Engineering Procedure 11 July 2021

SAEP-365
Machinery Spare Parts Reverse Engineering
Document Responsibility: Pumps, Seals, and Mixers Standards Committee)

Previous Revision: 11 July 2018 Next Revision: 11 July 2023

Contact: DHAFIAA Page 1 of 37
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 Document Responsibility: Standards Management Committee SAEP-365
Issue Date: 11 July 2021
Next Revision: 11 July 2023 Machinery Spare Parts Reverse Engineering

Contents
Summary Of Changes ................................................................................................... 3
1 Scope ...................................................................................................................... 4
2 Conflicts and Deviations .......................................................................................... 4
3 References .............................................................................................................. 4
3.1 Saudi Aramco References ................................................................................ 5
3.2 Industry Codes and Standards .......................................................................... 5
4 Terminology ............................................................................................................ 5
4.1 Acronyms .......................................................................................................... 5
4.2 Definitions.......................................................................................................... 6
5. Instructions .............................................................................................................. 6
5.1 General ............................................................................................................. 6
5.2 Applicable 9com Listing ..................................................................................... 9
5.3 Purchase Order Instructions and Specifications ................................................ 9
5.4 Manufacturing Facility Assessment Procedure ................................................ 14
6. Roles and Responsibilities .................................................................................... 16
Document History ........................................................................................................ 17
Appendix A - Re-Engineering Facility Pre-Visit Survey Form ......................................... 18
Appendix B - Re-Engineering Facility Auditing Aid ......................................................... 20
Appendix C - Technical Capabilities Audit Report Samples ........................................... 23
Appendix D - Pump Spare Parts Technical Specification Examples............................... 24

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 Document Responsibility: Standards Management Committee SAEP-365
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Summary of Changes

Paragraph Number Change Type

(Addition, Modification, Deletion, Technical Change(s)
Previous Revision Current Revision New)
(11 July 2018) (11 July 2021)
Old SAEP format New SAEP templet Editorial Modification Editorial revision to extend the
format standard duration from 3 to 5
years. This SAEP was
converted to the new SAEP
templet.

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 Document Responsibility: Standards Management Committee SAEP-365
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1 Scope

1.1 This Saudi Aramco Engineering Procedure (SAEP) establishes the

methodology for obtaining reverse engineered spare parts from an approved
spare parts manufacturer. It specifies the minimum requirements and quality
checks that need to be included in the purchase order (PO). This procedure
also identifies the responsibilities of the various Saudi Aramco involved
departments.

Castings for fire water pumps shall be approved by Fire Protection Department / Fire
Operations Technical Support Group.
1.2 This SAEP also establishes guidelines for surveying and assessing the
technical capabilities and Quality Management System effectiveness of new or
existing reverse engineering spare parts manufacturing facilities being
considered for addition to the Saudi Aramco approved manufacturers.

1.3 Additional requirements may be included in Scopes of Work, Drawings, or other

Instructions or Specifications pertaining to the PO.

1.4 Reverse engineering shall be considered only for non- patented designs or for
patented designs for which the patent covering the design has expired.

Saudi Aramco will not indemnify or defend any spare parts manufacturer
against patent infringement to whom a PO is issued hereunder. If there is any
concern regarding issues involving patents, the Law Department should
immediately be consulted.

1.5 Reverse engineering shall not be used unless one of the conditions in Section
5.1.1 is met.

1.6 Any party involved in preparing the PO and subsequent party to whom work is
awarded shall not use or have access to OEM drawings.

2 Conflicts and Deviations

Any conflicts between this document and other applicable Mandatory Saudi
Aramco Engineering Requirements (MSAERs) shall be addressed to the
EK&RD Coordinator.

Any deviation from the requirements herein shall follow internal company
procedure SAEP-302.

3 References
All referenced specifications, standards, codes, drawings, and similar material
are considered part of this engineering procedure to the extent specified,
applying the latest version, unless otherwise stated.
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 Document Responsibility: Standards Management Committee SAEP-365
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3.1 Saudi Aramco References

Saudi Aramco Engineering Procedures
SAEP-302 Waiver of a Mandatory Saudi Aramco Engineering
Requirement
SAEP-1142 Qualification of non-Saudi Aramco NDT Personnel
Saudi Aramco Inspection Requirements

175-791100 Re-engineered Parts made by Machining or Welding

175-791200 Re-engineered Cast Parts Other than Impellers
175-791300 Re-engineered Pump Impellers

3.2 Industry Codes and Standards

American Society of Mechanical Engineers
ASME SEC VIII D1 Rules for Construction of Pressure Vessels
ASME SEC IX Qualification Standard for Welding and Brazing
Procedures, Welders, Brazers, and Welding and Brazing
Operators
International Standards Organization
ISO 8062-3:2007 General Dimensional and Geometrical Tolerances and
Machining Allowances for Castings
ISO 9000 Quality Management Systems - Fundamentals and
Vocabulary
ISO 9001 Quality Management Systems Requirements
Manufacturers Standardization Society
MSS-SP-55 Rules for Construction of Pressure Vessels
ASME SEC IX Quality Standard for Steel Castings for Valves, Flanges
and Fittings and Other Piping Components - Visual Method
for Evaluation of Surface Irregularities
4 Terminology

4.1 Acronyms

9COM: Commodity Number.

Approved Manufacture: SAP approved spare parts manufacturer other than
the OEM.

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CR&OU: Contracted Repair & Operation Unit

CSD: Consulting Services Department Equipment Specialist/Engineer
ID: Inspection Department
MSSD: Mechanical Services Shop Department
NDE: None Destructive Examination
NDT: None Destructive Testing (same as NDE)
OEM: Original Equipment Manufacturer
ID&SSD: Industrial Dev & Strategic Supply Department
PMI: Positive Material Identification
PO: Purchase Order
VID: Vendor Inspection Division
SAEP: Saudi Aramco Engineering Procedure
SAP: Saudi Aramco corporate database that includes various types of material
masters, i.e., 9COM, 9CAT, etc.
SCC: Standards Committee Chairman of a specific CSD machinery discipline
such as Pumps & Seals-Mixers Committee, Compressors & Steam Turbines,
motors and generators, etc.
4.2 Definitions
Quality Plan: Document specifying which procedures and associated
resources shall be applied by whom and when to a specific project, product,
process or contract. [ISO 9000]
Quality System: Organizational structure, procedures, processes and
resources needed to implement quality management. [ISO 9000]
Reverse Engineering: The process by which a mechanical component can be
modeled by evaluating its mechanical and performance characteristics and
measuring its physical dimension in order to produce a duplicate or an
enhanced version of the component.

5. Instructions

5.1 General

5.1.1 Reverse engineering shall only be considered when:

i) The OEM no longer exists or no longer produces the product.

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ii) The product performance and features need improvement.

iii) The OEM is quoting an inflated price.
iv) The OEM is quoting an unacceptable delivery time that cannot
be improved with application of commercially reasonable
premium payments.
5.1.2 Reverse engineering shall be considered only for non-patented
designs or for patented designs for which the patent covering the
design has expired.
Saudi Aramco will not indemnify or defend any spare parts
manufacturer against patent infringement to whom a PO is issued
hereunder. If there is any concern regarding issues involving patents,
the Law Department should immediately be consulted.
5.1.3 Procurement of spare parts made by a manufacturer not listed as
approved spare part manufacturer in Saudi Aramco SAP system is
not allowed without approval. Approval may be granted on a case-
by-case basis limited to a specific PO in accordance with the Saudi
Aramco one time approval procedure. Such business decision shall
be established jointly by the party requesting the approval and the
technical authority (CSD and ID) in the best interest of Saudi Aramco,
technically and commercially. Requests for approval of an
unapproved manufacturer must be supported by documentation
identifying how this manufacturer would better serve Saudi Aramco
over the approved manufacturers.
5.1.4 Approved spare parts manufacturers may be considered as an
alternative supplier in addition to the OEM for a specific equipment
spare part, if the manufacturer provided spare parts to Saudi Aramco
that had served for more than two years with satisfactory operation.
5.1.5 Any modification to an existing spare part design shall be submitted
for the review and concurrence by the SCC.
5.1.6 If a sample or a Saudi Aramco drawing is not available for reverse
engineering of parts, then the approved spare part manufacturers
may be allowed to design a new spare part to meet the pump
requirements. In such case, CSD shall be consulted to determine the
proper required testing to verify the parts suitability such as factory
testing or field testing.
5.1.7 The main target for this procedure is spare parts for rotating
equipment. Other stationery equipment spare parts can also be
included as needed. These targeted parts are manufactured by
casting, machining or fabrication/welding. This should exclude parts
that are made using special manufacturing procedures such as

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antifriction and hydrodynamic bearings and parts made by forging.

The below table show the typical parts that can be made by reverse
engineering and the parts that are typically excluded from reverse
engineering.

Equipment Reverse Engineered Parts ( Note Part Excluded from

1) Reverse Engineering
Centrifugal Impellers, Shafts, Sleeves, Bearings, Parts made by
Pumps Bushings, Wear Rings, Keys, precision castings or
Deflectors, etc. forging.
Centrifugal Shaft Sleeve, Labyrinths Seal, Shaft, Casing, Bearing
Gas Balance Piston, Shaft Seal; Bushing Housing, Impeller, Bearings,
Compressor Type Mechanical Seals
Centrifugal Diffuser Scroll Housing, Low Speed High Speed Impeller, HS-LS
Air Impeller, Diffuser Vanes, Intercooler Shafts, Gears, Oil Pump,
Compressor Bundle, Aftercooler Shell. Gearbox Casing, Bearings.
Reciprocating Piston, Cast Cylinder, Cylinder Forged Cylinder, Welded
Gas Head Cover, Cylinder Liner, Piston Cylinder, Oil Pump,
Compressor Rings-Rider Band, Piston Rod. Crankshaft, Crosshead,
Bearings, Frame, Distance
Piece.
Centrifugal Impeller, Shaft, Shaft Sleeve, Casing, Bearing Housing,
Air Blower Labyrinths Bearings
Steam Stationary Blading, Blade Carrier, Casing, Bearing Housing,
Turbine; Shaft, Labyrinth Seals, Governor Wheel, Rotating Blades,
Special Valve components; Stem, Valve Bearings
Purpose Plug, Bushings.
Multistage
Steam Rotating & Stationary Blading, Casing, Wheel, Bearings,
Turbine; Bearing Housing, Gland Box Mechanical Seals.
General Housing, Shaft, Labyrinth Seal,
Purpose Governor Valve components: Stem,
Single Stage Valve Plug, Bushings.
Shaft Hubs Spool, Spacer Assembly,
Coupling All Shim Pack, Bolt Set.
Sizes
Motor Shaft, Rotor (Note 2), Cooling Fan, Casing, Bearings.
Bearing Housing, junction box,
aluminum seals.
Fin Fan Fan Shaft, Motor Pulley, Fan Pulley Blades, Hub, Bearing.
Note 1:
Reverse engineering should not be applied to parts that are made using special
manufacturing procedures even if they fall within this above criteria. If reverse engineering for
such parts is needed, please consult with CSD to verify the vendor’s capability to make such
parts.
Note 2:
Rotor’s of motors are not fully reversed engineered due to its construction. Rotor’s
construction is made up of rotors, cages and core. These require a manufacturer type of
knowledge to perform a reversed engineering. Therefore, the reverse engineering is limited to
the shaft (element) but fully reverse a motor rotor is not possible.

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5.2 Applicable 9COM Listing

5.2.1 9COM number 6000012812: Re-Engineered Machinery Components

made by Casting or 3D printing.
The inspection and testing requirements for this 9COM shall be in
accordance with the PO instructions and inspection form 175-791300
for impellers and inspection form 175-791200 for casing parts. This
9COM includes the following pressure retaining and non-pressure
retaining spare parts made by casting: impellers, casings, bearing
housings, diffusers, discharge bowls, suction bell mouths, and
stuffing boxes.
Note:
The spare parts inspection requirement may be waived for machinery in non-critical
applications if accepted by the SCC.
5.2.2 9COM number 6000011675: Re-Engineered Machinery Parts made
by Machining or Welding.
The inspection and testing requirements for this 9COM shall be in
accordance with the PO instructions and inspection form 175-791100.
This 9COM includes but not limited to the following spare parts:
shafts, sleeves, bushings, wear rings, column pipes, vertical pump
head, and coupling hubs.
5.3 Purchase Order Instructions and Specifications

As there are no specific standards addressing spare parts manufacturing, it is

the responsibility of Saudi Aramco repair facility requesting the part to include
all applicable technical specification in the PO specification. To assist in this
manner, the below instructions are given in addition to the technical
specification guideline in Appendix D.
5.3.1 Saudi Aramco repair facility should specify the spare part exact
material in the PO. If there is a need for a material upgrade, they
may contact CSD for recommended upgrade material.
5.3.2 The PO shall specify all the casting and machining tolerances. For
machining, special focus shall be given to clearance and interference
fits which shall be based on OEM settings, international standards
limits or MSSD repair procedures. For pump casting, special focus
shall be given to vane thickness, inlet and outlet vane angels, and
vane profile for impellers, diffusers, and volutes.
5.3.3 Saudi Aramco repair facility shall include a detailed drawing in the PO
to show the locations and values of the required critical dimensions
such as runout and concentricity. Original OEM drawing shall not be
included in the PO nor shall original OEM drawings be used to
generate any drawings. Saudi Aramco will not indemnify or defend
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any spare parts manufacturer against patent or copyright

infringement to whom a PO is issued hereunder.
For reverse engineered parts where a detailed drawing is not
available, a sample of the part shall be given to the manufacturer to
develop his own drawing.
Unless accepted by the SCC, the manufacturer shall develop a
detailed drawing for cast parts using 3D measurement device if one
or more of the following criteria is met:

Pump Impellers Pressure Retaining Casing Parts

Pressure casings for all between bearing

Rotating speed above 3,600 rpm
pumps

Diameters larger than 15 in.

Vertical pump bowls with O.D. above 20 in.
Power (per stage) exceeds 150 HP

Unless For other pump parts than the above, the manufacturer is free
to choose the appropriate measurement method including hand
measurement to produce a 2-D drawing which shall be sent for
purchaser review. Hand tools can be used to make the pattern.
Metal loss of the supplied sample and the casting shrinkage shall be
taken into account. For other machinery spare parts made by casting,
consult with the relevant machinery SCC for advice.
When a 3D measurement is required, the manufacturer shall
generate the 3D model of the part taking into account any existing
damage in the original sample such as thinning due to erosion and
corrosion. This 3D model shall be sent for purchaser review. All
critical dimensions and tolerances shall be clearly specified in this
drawing in order to be verified by the purchaser. The finalized 3D
model shall be used to develop the casting pattern, using an
automated 3D machining device, taking into account all casting
process effects such as shrinkage. A 3D measurement shall be
conducted for the final product and shall be compared with the
original 3D model to ensure meeting the PO tolerances. For
components requiring 3D measurements, the use of hand tools to
develop impeller and pressure casing pattern is not allowed unless
approved by the SCC and proponent.
5.3.4 Radiographic examination shall be conducted on cast pump impellers
if the peripheral velocity at rated speed is 75 m/s (250 ft/s) or higher.
Radiographs shall be made after machining and shall cover impeller
shrouds over the outer 75 mm (3 in) of the radius. In addition,

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radiographs shall also be taken through the impeller, thus showing

the intersection of the vanes and shrouds.
Pump impellers shall be subjected to a fluorescent magnetic particle
examination (ferromagnetic material) or a liquid penetrant
examination (non-ferromagnetic material) if the peripheral velocity of
the impeller at rated speed is 45 m/s (150 ft/s) or higher. All visible
surfaces of the finished impeller (prior to wear ring installation) shall
be examined and shall be in agreement with the criteria set forth in
the ASME SEC VIII D1, Appendices 6 and 8. Deviation from this
requirement requires SCC concordance.
5.3.5 Hardness testing shall be required in the PO for parts subjected to
sour service or if the material needs to have a specific hardness such
as wear rings.
5.3.6 NDT requirements specified in the inspection forms represent the
minimum requirements. The Saudi Aramco repair facility may specify
additional NDT testing in the purchase order.
Note:
The repair facility may consult with Saudi Aramco Operations Inspection Department NDE Unit
to determine the feasibility of additional NDE testing.
5.3.7 The Saudi Aramco repair organization such as MSSD or field
maintenance department shall contact CSD to determine the
additional requirements that need to be included in the PO for
manufacturing cast spare parts for machinery that meet one or more
of the following criteria:
i) Machinery speed is more than 3,600 rpm.
ii) Machinery driver is more than 1,000 HP.
iii) Machinery liquid specific gravity is less than 0.7.
iv) Machinery liquid temperature is more than 250°F or less than
32°F.
v) Machinery maximum allowable working pressure more than 900
psig.
vi) Machinery in sour service with H2S concentration of more than
1,000 ppm.
5.3.8 All weld repairs and post weld heat treatment shall conform to the
original material specification of the casting. All welding procedure
specifications, performance qualification records, and weld map
documents must be available for the purchaser inspector review upon
his request.

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Weld repairs of pressure containing castings and for impellers shall

be considered major if any of the following conditions apply:
a) Castings leak during hydrostatic testing
b) The depth of the repair cavity prepared for welding exceeds 20%
of the wall thickness or 25 mm (1 in), whichever is smaller
c) The surface area of the repair cavity exceeds 65 cm² (10 in²).
All major weld repair procedures, including the welding procedure
specifications (WPS), with supporting documentation shall be
prepared and submitted to the Buyer Representative for review and
concurrence by the SCC prior to any repairs being conducted.
Welders shall be qualified in accordance with the requirements of
ASME SEC IX.
All major repairs shall be documented. The documentation shall
include the following:
a) Extent of the repair
b) Location
c) Size
d) The welding procedure specification
e) Detailed photographs of the defect:
1) Prior to any preparatory work
2) After preparation but prior to the actual repair.
If the location of the defect cannot be clearly defined by photographic
means, the location shall be indicated on a sketch or drawing of the
affected component.
The Purchaser may require additional non-destructive examinations
to verify the acceptability of the repair. Such additional requirements
shall then be subject to mutual agreement between the Purchaser
and the Vendor.
5.3.9 Surfaces of castings shall be cleaned by sandblasting, shot blasting,
chemical cleaning or other standard method to meet the visual
acceptance requirements of MSS-SP-55. Mould-parting fins and
remains of gates and risers shall be chipped, filed, or ground flush.
5.3.10 For pressure retaining casings, magnetic-particle or liquid-penetrant
examination is required for auxiliary connection welds. Radiographic
examination is required for the welded areas of the suction and
discharge nozzles and any casing welds. Radiographic examination

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may be substituted by ultrasonic or liquid penetrant examination if

accepted by the SCC.
5.3.11 For pressure retaining castings, magnetic particle examination shall
be conducted on all accessible surfaces of ferromagnetic castings
except machined gasket surfaces. Liquid penetrant examination shall
be conducted on all machined gasket surfaces of all materials and on
all accessible surfaces of non-ferromagnetic castings.
5.3.12 For pump pressure retaining castings, radiographic examinations
shall be performed for the following services:
a) Services where the maximum discharge pressure exceeds 900
psig (integrally geared pumps are excluded);
b) Services where the maximum temperature exceeds 260°C
(500°F);
c) Boiler feed water services where the maximum operating
temperature exceeds 149°C (300°F);
d) Services where the minimum operating temperature is below
minus 29°C (minus 20°F);
e) Autoignition services;
f) Sour services with H2S concentration above 1,000 ppm;
g) Flashing hydrocarbon services where the maximum allowable
working pressure exceeds 500 psig.
Radiographic examinations shall be performed on the pressure
retaining castings at following areas:
i- Junctions of risers, gates and feeders;
ii- Transition between casing and both suction and discharge
nozzles;
iii- Transition between casing and volute flanges;
iv- Transition between casing and feet;
v- Junction where the casing meets the seal housing.
5.3.13 Hydrostatic test shall be conducted for all pressure retaining parts
and shall be witnessed by VID inspector or proponent. The test shall
be performed at 1.5 times the maximum allowable pressure at
ambient temperature and for a minimum of 30 minutes. In case of
test failure, the vendor shall submit his repair procedure to Saudi
Aramco for review and approval.
5.3.14 Pump impellers, balancing drums, and similar major rotating
components shall be dynamically balanced to ISO 1940-1 Grade

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G2.5. The mass of the arbor used for balancing shall not exceed the
mass of the component being balanced.
5.3.15 When the engineering drawing or the 3D model is developed by the
vendor based on a provided sample, the ownership of the drawing or
3D model shall belong to Saudi Aramco. The vendor shall provide
the full detailed drawing or 3D model to Saudi Aramco for use in
future orders.
5.4 Manufacturing Facility Assessment Procedure

5.4.1 Facility Evaluation Phases

This section provides general guidelines to be considered by Saudi
Aramco auditors conducting facility assessment visits. Typical
manufacturing facility survey consists of both technical and quality
system evaluations and can be implemented in two main phases;
pre-visit phase and facility visit phase.
The below two subsections for the two phases contain the minimum
information needed to complete the assessment. It shall be
completed to the full extent possible; additional engineering judgment
shall also be part of the evaluation, as occasionally it may not be
possible to complete all the inquiry fields.
5.4.1.1 Pre-Visit Phase
This phase addresses the data that need to be collected before the
visit and the items that need to be prepared prior to the plant visit.
The below list covers some of the main items in this pre-visit phase:
a) Obtain a copy of the factory invitation letter.
b) Request a list of sub-suppliers, their locations to visit if
needed.
c) Ask for experience list.
d) Obtain an organizational chart for the specified manufacturing
plant to show all available facilities.
e) Obtain a copy of the ISO 9001 Quality Manual and six
mandatory procedures.
f) Obtain a copy of the ISO 9001 Certificate if the manufacturer is
certified.
g) If the manufacturer has an engineering department, then
obtain a copy of the department organization chart and
determine the number of engineers and their disciplines. If
not, determine if there is any outside design consultants used
and get their information.

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h) Request the manufacturer to fill in the pre-visit survey form

shown in Appendix A.
i) Request a list of in-house and outsourced manufacturing
activities and available in-house design software and tools.
The assessment team shall meet and review the provided
information from the manufacturer and agree on the individuals
responsibilities.
The lead auditor shall inform the organization of the audit schedule
at least seven days prior to the assessment.
5.4.1.2 Facility Visit Phase
This phase addresses the items to be covered during the plant visit.
Appendix B addresses the visit plan and some of the main checks
needed to complete the assessment.
The team should obtain copies of all needed procedures and
qualification records for review by the responsible Saudi Aramco
organizations such as Non-destructive Testing Unit for approving the
NDT process, NDT procedures, NDT qualifications, and NDT written
practice.
5.4.2 Quality Requirements and Evaluation
This section provides general guidelines to be considered by Saudi
Aramco auditors conducting facility assessment visits. Typical
manufacturing facility survey consists of both technical and quality
system evaluations and can be implemented in two main phases;
pre-visit phase and facility visit phase.
5.4.2.1 ISO 9001 certification is not mandatory. However, the spare parts
manufacturer shall operate a Quality System in accordance with ISO
9001 which will be verified during the survey by Saudi Aramco ID
representative.
5.4.2.2 Qualification of Non-Saudi Aramco Non-destructive Testing (NDT)
personnel should be as per SAEP-1142. NDT national and
international Certification Programs may be accepted if approved by
Non-destructive Testing Unit of Saudi Aramco Inspection
Department.
5.4.3 Reporting
Upon completion of the plant assessment visit, a technical
assessment report should be generated to compile the assessment
findings and reflect the conclusions and recommendations. The
report should be addressed to the VID and copies may be distributed
as needed to: MSSD, CSD, and other related departments. A copy of

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this report should be attached in the SAP workflow by VID to be used

for later reviews. The report must include as a minimum the following
items (Appendix C) shows a sample report format):
i) Introduction that provides background description of the plant
being surveyed, plant products, certifications, and surveying
organizations.
ii) Summary of the survey key highlights including: activities done
during the visit, plant capabilities, equipment, manufacturing
processes, inspection and testing capabilities, production
limitations, etc.
iii) Recommendations, concerns and required corrective actions for
approving the manufacturer.
iv) Attachment of the completed facility survey forms shown in
Appendices A and B.
The technical survey team must issue their technical assessment
report within five working days of completing the survey and send it to
the SCC for review. VID auditors will complete the quality system
auditing report which will be added in the SAP workflow.

6. Roles and Responsibilities

6.1 CSD shall be the technical approval authority for manufacturers not listed as
approved manufacturer in Saudi Aramco SAP System.

6.2 ID is responsible for reviewing and approving the manufacturer Quality Plan
and inspection and test plans. ID is also responsible for the quality
management system approval of the reverse engineering vendors.

6.3 It is the responsibility of ID&SSD to register new casting and fabrication facilities
and to initiate and coordinate the SAP Approval Workflow.

6.4 MSSD, CSD, and other surveying organizations are responsible for reviewing
the technical capabilities of the manufacturer.

6.5 It is the responsibility of VID inspector, proponent or proponent representative

(such as MSSD) to witness and verify the material tests and dimensional
checks for impellers and casing parts as specified in the inspection forms. For
spare parts that do not require witnessing at the manufacturing facility, it is the
responsibility of the spare part receiving organization, such as MSSD or plant
maintenance department, to conduct in-house Positive Material Identification
(PMI) and dimensional checks for verifying compliance to the PO specifications.

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6.6 Saudi Aramco repair facility shall be responsible to supply the required spare
part dimensions by providing a sample or non OEM drawings and include all
required critical dimensions (such as runout and concentricity) in the PO.

The original equipment manufacturer (OEM) drawings shall not be included in

the P.O. nor shall be used to generate any drawings.
6.7 For machinery repaired by a non-Saudi Aramco repair facility, it is the
responsibility of the Saudi Aramco organization requesting the repair, such as
MSSD or field maintenance department, to ensure that the requirements of this
procedure are adhered to when the repair facility is going to utilize a reverse
engineered spare part.

6.8 Non-destructive Testing Unit of the Operations Inspection Division shall be

responsible for approving the NDT process, NDT procedures, NDT
qualifications, NDT written practice, etc.

Document History
11 July 2021 Editorial revision to change the revision cycle from three to five years as per the
updated SAEP-301. The format was converted to the new template.
11 July 2018 Major revision is done to change the document scope from pumps only to
general machinery. The new revision allows the reverse engineering of other
machinery parts such as compressor, steam turbines, motors, and fin fans. This
is the main change in the procedure.
18 March 2018 Editorial revision to modify Section 2, paragraphs 6.3, 6.5, 7.1(Note), 8.3
paragraph #3, 8.8 paragraph #3, 8.10, 8.15, and Appendix D.
26 September 2016 Major revision to update some requirements to be aligned with the local
facilities capabilities, to include firewater pumps in re-engineering, and to
update the inspection requirements (175 forms).

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 Document Responsibility: Standards Management Committee SAEP-365
Issue Date: 11 July 2021
Next Revision: 11 July 2023 Machinery Spare Parts Reverse Engineering

Appendix A - Re-Engineering Facility Pre-Visit Survey Form

1.0 FACILITY INFORMATION

Company Name:
Address: Website ( if available):

City: Telephone:
Country: Fax:
Contact person: e-mail:
Vendor partner company/group name:
Address:

Company start up name & date:

2.0 MAJOR CUSTOMERS (list all major customers and supplied products)

3.0 PUMPS SPARE PARTS PRODUCT INFORMATION (Tick one Box)

Experienced in manufacturing the part. Capable of making the part but did not manufacture it before. Not Capable of manufacturing the part.
Experienced Capable Not Experienced Capable Not
Capable Capable
Impellers Column pipes
Casings Stuffing boxes
Diffusers Bearing housings
Shafts Discharge bowls
Sleeves Coupling hubs
Bushings Suction bell mouths
Wear rings
Others Pump Spare Parts (Please specify):

3.2 List all company license, certification and standards and codes used:

3.3 Type of re-engineering measurement tools and methods. Manual Automated

(Please specify):

3.4 What is your production limitation?

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3.5 Do you have long term filling system for the part drawings, QA tests, etc. ? YES NO
3.6 Do you have a material traceability system? YES NO
3.7 List all the main casting materials:

3.8 List all used casting methods:

4.0 MANPOWER
Total Number of Employees: Number of Engineers:
Number of QA/QC Personnel: Saudization %:
Number of qualified welders: Total Number of qualified NDE personnel:

5.0 PROCESS (Tick Box if applicable)

Welding Processes: SMAW GTAW FCAW SAW PLASMA

NDT Processes: PT MT UT RT
Painting/ Coating YES NO N/A Surface Blasting YES NO N/A
Heat Treatment YES NO N/A Mechanical Testing Lab YES NO N/A
Hydro Test YES NO N/A Metallurgical Lab YES NO N/A
Calibration Lab YES NO N/A Foundry YES NO N/A
Others (Please specify):

6.0 SUB-SUPPLIERS and SUB-CONTRACTORS

6.1. List the major Sub-Suppliers of raw materials/Sub-Components
Sub-Supplier Name Raw Material/Sub-Components

6.2. List the major Sub-Contractors of work/service

Sub-Contractor Name Service

Completed by:
Name: Position: Signature: Date:

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 Document Responsibility: Standards Management Committee SAEP-365
Issue Date: 11 July 2021
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Appendix B - Re-Engineering Facility Auditing Aid

Visit Plan:

• Brief presentation
• Plant tour
• Discussions
Items to be covered in the presentation:
• Company history
• Organization chart
• Quality management system and certifications
• Company license, certification, standards, and codes used
• Manufacturing process
• Production facilities and equipment
• Material standards and traceability
• Major customers and success stories
• Experience list if available
• In-house and outsourced manufacturing activities
• Available in-house design software and tools
• Safety
• Casting technique and capability/limitations if applicable
• Automated measurement tools for casting part if applicable
• Casting material grades if applicable
• Machining/ fabrication/ balancing capability/limitations if applicable.
Items to be covered in the Discussions:
• Verifications and clarifications for the submitted data in the pre-visit phase such as the data
in the facility pre-visit survey form and the quality manual
• Quality management system in compliance with International Organization for
Standardization ISO 9001 which will be verified during the survey by Saudi Aramco ID
representative
• The manufacturer should describe the overall Quality Management System employed on
the project and identify those processes, procedures, and other documents that ensure
effective operation and control of the processes including those of subcontractors.
• Discussion of any corrective actions required by the manufacturer.

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 Document Responsibility: Standards Management Committee SAEP-365
Issue Date: 11 July 2021
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Re-Engineering Facility Check List:

No. Item To be Checked Yes No N/A Comments
Is the facility familiar with ISO (International
1
Standard Organization)?
Is the facility familiar with API (American Petroleum
2
Institute)?
Is the facility familiar with ASME (American Society
3 of Mechanical Engineers) and ASTM standards
(American Society for Testing and Materials)?
Is the facility familiar with SASO (Saudi Arabian
4
Standard Organization)?
Verify all company license, certification, standards,
5
and codes used.
6 Does the facility have a Quality System manual?
Are all the employees (including craftsmen) aware
7
of this Quality manual?
Is Quality System manual being practiced by all
8
employees (including craftsmen)?
9 Does the facility have a Quality Assurance manual?
Does the facility produce evidence of completing
10
similar request level of spare parts?
11 Is the facility size suitable for the intended work?
Does the facility own separate and environmentally
12 controlled serviceable and unserviceable spare
parts and raw material store area/shelter?
Is the facility equipped with necessary handling
13
equipment (overhead cranes, forklifts, etc.)?
Does the facility issue the required safety protective
14
tools, clothing, etc., to its employees?
Are the employees formally aware of potential
15 manufacturing hazards, e.g., hot materials, toxic
fumes, etc.?
Do the facility premises contain a chemical
15
cleaning facility?
State the Saudi percentage in the management
16
workforce?
State the Saudi percentage in the shop floor
17
workforce?
Does the facility have automated measurement
18
tools?
Does the facility have an adequate job tracking
19
system?
Does the facility have welders and welding
procedures?
20 Does the facility welders qualification and welding
procedures comply with international standards
such as ASME SEC IX

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No. Item To be Checked Yes No N/A Comments

Are the certified welders’ certificates valid?
Does the facility have welder qualification records
and is it updated?
Does the facility have post weld heat treatment
capabilities with certified procedures?
Does the facility have long term filling system for
21
the parts drawings, QA tests, etc.
Does the facility contain a Calibration shop?
Does the facility have a certified calibration work
force and procedures?
22
If yes, are their certificates valid?
Does the facility calibrate its measuring tools and
instruments utilizing a third party?
Does the facility contain Radiography testing (RT)
capabilities
Does the facility have a certified RT personnel and
procedures?
23 Does the facility contain NDT capabilities?
Does the facility have a certified NDT personnel
and procedures?
If yes, are their certificates valid?
Does the facility contain a material analysis
laboratory?
Does the facility have a certified material analysis
24
personnel and procedures and calibrated
equipment?
If yes, are their certificates valid?
Do facility premises contain Hydrotest Area?
Does the facility have mechanical testing
capabilities for hardness?
25
Is the facility equipped with certified testing
workforce and procedures?
If yes, are their certificates valid?
Does the facility have Internal Coating capabilities
(e.g., Hard coating)?
26 Does the facility have a certified work force and
procedures for internal coating?
If yes, are their certificates valid?
Does the facility have criteria for assessing in-
27
service (reject/accept) parts?
Do the above criteria (Item # 27) conform to Saudi
28
Aramco procedures and ISO 9001:2000?
29 Does the facility have machining capabilities?

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 Document Responsibility: Standards Management Committee SAEP-365
Issue Date: 11 July 2021
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Appendix C - Technical Capabilities Audit Report Samples

Date
"Manufacturer Name" Technical
Capabilities Evaluation Report
INSPECTION DEPARTMENT
VENDOR INSPECTION DIVISION

On "date", representatives from CSD, MSSD… conducted a technical evaluation for

"manufacturer name" facility located in "facility location" to verify their capabilities for reverse
engineering spare parts that falls under 9COM number 6000012812 and/or 6000011675. This
report summarizes the finding and recommendation of this Evaluation.
i) Surveying Participants

Participant Name Department Email Address (@aramco.com)

ii) Manufacturing Facility Background

(Introduction and summary of plant history, certifications, and experiences)
iii) Manufacturer Capabilities and Limitations Summary
(Summary of the survey key highlights including: activities done during the visit, plant
capabilities, equipment, manufacturing processes, inspection equipment, production
limitations, etc.)
iv) Recommendations and Corrective Actions
(Recommendations, concerns and required correction actions for approving the
manufacturer if any, suggestions for manufacturer development, etc.)

Participant's initials

Attachments:
1- Re-Engineering Facility Pre-Visit Survey Form
2- Re-Engineering Facility Check List

cc: Supervisor, CSD/RED/REU with attachment

RED Pump Engineers with attachment
Other Participants with attachment

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 Document Responsibility: Standards Management Committee SAEP-365
Issue Date: 11 July 2021
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Appendix D - Pump Spare Parts Technical Specification Examples

Use the following guideline to generate the technical specification documents for the
applicable part (examples are included):
I- Technical Specification Example for Impeller
1- Specify the original and new materials.
Original impeller material is ASTM A216 WCB.
New impeller material is ASTM A743 CF3M.

2- Specify the required quantity

Quantity: 3

3- Use the pump datasheet to specify pump parameters. Verify if any of the
criteria in paragraph 5.3.7 is met.
i- Pump speed = 3,600 rpm
ii- Pump driver HP Rating = 500 HP
iii- Pump fluid specific gravity = 0.8
iv- Pump liquid temperature = 115°F
v- Maximum allowable working pressure = 550 psig

Note:
Since none of SAEP-365 paragraph 5.3.7 limits are exceeded, it is not required to contact
CSD to specify any additional testing.
4- Include the impeller main dimensions.
Approximate impeller diameter = 32 inches. Other approximate dimensions are shown in
the below picture.

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Issue Date: 11 July 2021
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5- Specify the impeller weight

Approximate impeller weight = 200 Lb

6- Indicate the pump service

Service: Sweet Crude Oil (no H2S).

Note:
If the service is sour (H2S is present), hardness test shall be conducted and shall meet ISO
15156.
7- Include the following statement if any of the criteria in paragraph 5.3.3 is
met:

Using the result of the 3D measurement, the manufacturer shall generate

the 3D model of the part which should account for any existing damage in
the original sample such as thinning due to erosion and corrosion. This 3D
model shall be sent for purchaser review. All critical dimensions and
tolerances shall be clearly specified in this drawing in order to be verified by
the purchaser. The finalized 3D model shall be used to develop the casting
pattern using an automated 3D machining device, taking into account all
casting process effects such as shrinkage. A 3D measurement shall be
conducted for the final product and shall be compared with the original 3D
model to ensure meeting the PO tolerances. For components requiring 3D
measurements, the use of hand tools to develop impeller and pressure
casing pattern is not allowed unless accepted by the SCC and proponent.
Note:
Since the impeller diameter in the above example is more than 15 in, 3D scanning of the
provided sample impeller is required.
8- Include the following statement for Dimensional Tolerances:
The manufacturer shall ensure that the final product meets the below
required tolerances. Special focus shall be given to vane thickness, inlet
and outlet vane angels, vane profile and impeller inlet area. Unless
otherwise specified, the below tolerances shall be met:
I. Vane leading edge and trailing edge angels shall be within ±0.5
degree.
II. Unless otherwise specified in the drawing and agreed with purchaser,
the tolerances for the linear casting dimensions and wall thickness shall
be per ISO 8062-3:2007 Grade DCTG 6 and the tolerances for the
general geometrical casing shall be per ISO 8062-3:2007 Grade GCTG
5.

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 Document Responsibility: Standards Management Committee SAEP-365
Issue Date: 11 July 2021
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III. The tolerances for general machined surfaces shall not be more than
0.05 mm (0.002 in) and the tolerances for general machined length
shall be ±1.0 mm. Critical clearance and interference fits, such as
impeller bore and wear ring outer diameter, shall be agreed upon by
the manufacture and purchaser during the development and finalizing
of the impeller drawings.
9- Attach Inspection Form 175-791300. The manufacturer shall meet all the
inspection and testing requirements specified in the technical specification
and Inspection Requirement Form 175-791300.
Note:
Since none of SAEP-365 paragraph 5.3.7 limits are exceeded in this example, no addition
testing other than Inspection Requirement Form 175-791300 is required.
10- State that all subcontracted work, such as balancing, heat treatment and
hard coating, shall be done at an approved Saudi Aramco facility (contact
MSSD/CR&OU for the approved list). All applicable NDTs shall be done per
ASME BPVC, Section V. Machining of parts shall be done at a Saudi
Aramco approved facility under 9COM # 6000011675. The spare part
manufacturer shall refer to Saudi Aramco MSSD for list of approved
facilities.
11- Wear rings shall be per Section III of Appendix D.
12- Chaplets shall not be used in impeller castings.
13- Casting surfaces shall be cleaned by sandblasting, shot blasting, chemical
cleaning or other standard method to meet the visual requirements of MSS-
SP-55.
Mould-parting fins and remains of gates and risers shall be chipped, filed, or
ground flush.
14- Specify if Radiographic examination is required per paragraph 5.3.4.
Radiographic examination shall be conducted on the impeller since the peripheral velocity
at rated speed is 502 ft/s (3,600 / 60 x Π x 32” / 12).

15- Specify the required tests for all visible surfaces as per paragraph 5.3.4.
Since the impeller peripheral velocity (502 ft/s) is higher than 150 ft/s and since the impeller
material is non-ferromagnetic material, all visible surfaces of the finished impeller (prior to
wear ring installation) shall be examined by liquid penetrant and by shall be in agreement
with the criteria set forth in the ASME SEC VIII D1, Appendices 6 and 8.

16- Include paragraph 5.3.8 in the technical specification document:

All weld repairs and post weld heat treatment shall conform to the original
material specification of the casting. All welding procedure specifications,

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Issue Date: 11 July 2021
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performance qualification records, and weld map documents must be

available for the purchaser inspector review upon his request.

Weld repairs shall be considered major if any of the following conditions

apply:
a) The depth of the repair cavity prepared for welding exceeds 20% of the
wall thickness or 25 mm (1 in), whichever is smaller.
b) The surface area of the repair cavity exceeds 65 cm² (10 in²).

All major weld repair procedures, including the welding procedure

specifications (WPS), with supporting documentation shall be prepared and
submitted to the Buyer Representative for review and concurrence by the
SCC prior to any repairs being conducted.

Welders shall be qualified in accordance with the requirements of ASME

SEC IX.

All major repairs shall be documented. The documentation shall include the
extent of the repair, location, size, welding procedure specification, and
detailed photographs of the defect prior to any preparatory work and after
preparation but prior to the actual repair.

If the location of the defect cannot be clearly defined by photographic

means, the location shall be indicated on a sketch or drawing of the affected
component.

The Purchaser may require additional non-destructive examinations to verify

the acceptability of the repair. Such additional requirements shall then be
subject to mutual agreement between the Purchaser and the Vendor.
17- Specify the balancing requirements per paragraph 5.3.14.
18- The engineering drawings and 3D models shall be developed by the vendor
based on a provided sample. The ownership of the drawings and the 3D
model shall belong to Saudi Aramco. The vendor shall provide the full
detailed drawing and 3D model to Saudi Aramco for use in future orders.

II- Technical Specification Example for Pump Casing

1- Specify the original and new materials.
Original casing material is ASTM A216 WCB.
New casing material is ASTM A743 CF3M.

2- Determine the required quantity.

Quantity: 1

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3- Include the casing dimensions.

Approximate dimensions are shown in the below pictures.

4- Use the pump datasheet to specify the pump parameters in paragraph 5.3.7.
Pump Parameter

i- Pump speed = 3,600 rpm

ii- Pump driver HP Rating = 300 HP
iii- Pump fluid specific gravity = 0.47
iv- Pump liquid temperature = 129°F
v- Maximum allowable working pressure = 750 psig.

Note:
Since some of SAEP-365 paragraph 5.3.7 limits are exceeded, the person developing the PO
specification shall contact CSD to specify additional testing.
5- Specify the casing weight
Approximate casing weight = 2,000 Lb

6- Indicate the pump service and type

Service: NGL booster pump.

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Note:
If the service is sour (H2S is present), hardness test shall be conducted and shall meet ISO
15156. Since this is not a sour application (no H2S), hardness test is not required.
7- Include the following statement if any of the criteria in paragraph 5.3.3 is
met:

Using the result of the 3D measurement, the manufacturer shall generate

the 3D model of the part which should account for any existing damage in
the original sample such as thinning due to erosion and corrosion. This 3D
model shall be sent for purchaser review. All critical dimensions and
tolerances shall be clearly specified in this drawing in order to be verified by
the purchaser. The finalized 3D model shall be used to develop the casting
pattern, using an automated 3D machining device, taking into account all
casting process effects such as shrinkage. A 3D measurement shall be
conducted for the final product and shall be compared with the original 3D
model to ensure meeting the PO tolerances. For components requiring 3D
measurements, the use of hand tools to develop impeller and pressure
casing pattern is not allowed unless accepted by the SCC and proponent.
Note:
Since the pump is a between-bearing type, 3D scanning of the provided sample casing is
required. Drawing may be generated by manual measurement and casting pattern may be
developed using hand tools.
8- Include the following statement for Dimensional Tolerances:
The manufacturer shall ensure that the final product meets the below
required tolerances. Special focus shall be given to volute\diffuser wall
thickness, volute\diffuser leading edge angels, geometrical similarity for all
volutes\diffusers with correct centerline, and volutes\diffusers trailing edge
angels. Unless otherwise specified, the below tolerances shall be met:
I. Volutes\diffusers leading edge and trailing edge (when applicable)
angels shall be within ±0.5 degree.
II. Unless otherwise specified in the drawing and agreed with purchaser,
the tolerances for the linear casting dimensions and wall thickness
shall be per ISO 8062-3:2007 Grade DCTG 6 and the tolerances for
the general geometrical casing shall be per ISO 8062-3:2007 Grade
GCTG 5.
III. The tolerances for general machined surfaces shall not be more than
0.05 mm (0.002 in) and the tolerances for general machined length
shall be ±1.0 mm. Critical clearance and interference fits, such as
casing wear ring outer diameter, internal centering\alignments of all
casing machined surfaces and casing split line flatness, shall be agreed
upon by the manufacture and purchaser during the development and
finalizing of the casing drawings.
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9- Attach Inspection Form 175-791200. The manufacturer shall meet all the
inspection and testing requirements specified in this PO technical
specification and Inspection Requirement Form175-791200.
Note:
Since some of SAEP-365 paragraph 5.3.7 limits are exceeded, the person developing the PO
specification shall contact CSD to specify additional testing.
10- Include paragraph 5.3.13: Hydrostatic test shall be conducted for all
pressure retaining parts and shall be witnessed by VID inspector. The test
shall be performed at
1.5 times the maximum allowable pressure at ambient temperature and for a
minimum of 30 minutes. In case of test failure, the vendor shall submit his
repair procedure to Saudi Aramco for review and approval.
11- State that all subcontracted work, such as balancing, heat treatment and
hard coating, shall be done at an approved Saudi Aramco facility (contact
MSSD/CR&OU for the approved list). All applicable NDTs shall be done per
ASME BPVC, Section V. Machining of parts shall be done at a Saudi
Aramco approved facility under 9COM # 6000011675. The spare part
manufacturer shall refer to Saudi Aramco MSSD for list of approved
facilities.
12- Include paragraph 5.3.10: Magnetic-particle or liquid-penetrant examination
is required for auxiliary connection welds. Radiographic examination is
required for the welded areas of the suction and discharge nozzles (if
applicable) and any casing welds. Radiographic examination may be
substituted by ultrasonic examination, if accepted by the SCC.
13- Include the following requirements according to paragraph 5.3.12:
Radiographic examinations shall be performed on the pressure retaining
castings at following areas:
i. Junctions of risers, gates and feeders;
ii. Transition between casing and both suction and discharge nozzles;
iii. Transition between casing and volute flanges;
iv. Transition between casing and feet;
v. Junction where the casing meets the seal housing.
Note:
Since some of SAEP-365 paragraph 8.12 limits are exceeded, the above radiographic
examinations requirements were added to the PO specification.
14- Specify the applicable tests for all accessible surfaces.
Magnetic particle examination shall be conducted on all accessible surfaces
of ferromagnetic castings except machined gasket surfaces. Liquid

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penetrant examination shall be conducted on all machined gasket surfaces

of all materials and on all accessible surfaces of non-ferromagnetic castings.
15- Include the following testing requirements for welds.
Radiographic examination shall be conducted after major welds for pressure
containing part. All weld repairs and post weld heat treatment shall conform
to the original material specification of the casting. All welding procedure
specifications, performance qualification records, and weld map documents
must be available for the purchaser inspector review upon his request.
Weld repairs of pressure containing castings shall be considered major if
any of the following conditions apply:
a) Castings leak during hydrostatic testing.
b) The depth of the repair cavity prepared for welding exceeds 20% of the
wall thickness or 25 mm (1 in), whichever is smaller.
c) The surface area of the repair cavity exceeds 65 cm² (10 in²).
All major weld repair procedures, including the welding procedure
specifications (WPS), with supporting documentation shall be prepared and
submitted to the Buyer Representative for review and concurrence by the
SCC prior to any repairs being conducted.
Welders shall be qualified in accordance with the requirements of ASME
SEC IX.
All major repairs shall be documented. The documentation shall include the
extent of the repair, location, size, welding procedure specification, and
detailed photographs of the defect prior to any preparatory work and after
preparation but prior to the actual repair.
If the location of the defect cannot be clearly defined by photographic
means,
the location shall be indicated on a sketch or drawing of the affected
component.
The Purchaser may require additional non-destructive examinations to verify
the acceptability of the repair. Such additional requirements shall then be
subject to mutual agreement between the Purchaser and the Vendor.
16- Casting surfaces shall be cleaned by sandblasting, shot blasting, chemical
cleaning or other standard method to meet the visual requirements of MSS-
SP-55.
Mould-parting fins and remains of gates and risers shall be chipped, filed, or
ground flush.

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17- The use of chaplets in pressure castings shall be held to a minimum. The
chaplets shall be clean and corrosion-free (plating is permitted), and of a
composition compatible with the casting.
18- The engineering drawings and 3D models shall be developed by the vendor
based on a provided sample. The ownership of the drawings and the 3D
model shall belong to Saudi Aramco. The vendor shall provide the full
detailed drawing and 3D model to Saudi Aramco for use in future orders.

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III- Technical Specification Example for Wear Ring (Machined Part)

1- Specify the required wear ring material
Wear ring material shall be 316 SS with Stellite-6 weld overlay on the outside diameter.

2- Specify the total quantity

Quantity: 4

3- Use the pump datasheet to specify the pump parameters according to

paragraph 5.3.7
Pump Parameter
i- Pump speed = 3,600 rpm
ii- Pump driver HP Rating = 500 HP
iii- Pump fluid specific gravity = 0.99
iv- Pump liquid temperature = 115°F
v- Maximum allowable working pressure = 550 psig.

Note:
Since none of SAEP-365 paragraph 5.3.7 limits are exceeded, contacting CSD to specify
additional testing is not required.
4- Include the dimensions and tolerances
Dimensions and tolerances shall be as per the below drawing.

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5- Indicate the pumps service.

Service: Sweet Crude Oil. This is not a sour application (no H 2S).

6- Attach Inspection Form 175-791100. The manufacturer shall meet all the
inspection and testing requirements specified in this technical specification
and Inspection Requirement Form 175-791100.
Note:
Since none of SAEP-365 paragraph 5.3.7 limits are exceeded, no addition testing other than
Inspection Requirement Form 175-791100 is required.
7- State that all subcontracted work, such as balancing, heat treatment and
hard coating, shall be done at an approved Saudi Aramco facility (contact
MSSD/CR&OU for the approved list). All applicable NDTs shall be done per
ASME BPVC, Section V. Machining of parts shall be done at a Saudi
Aramco approved facility under 9COM # 6000011675. The spare part
manufacturer shall refer to Saudi Aramco MSSD for list of approved facilities.
8- The engineering drawings shall be developed by the vendor based on a
provided sample. The ownership of the drawings shall belong to Saudi
Aramco. The vendor shall provide the full detailed drawing to Saudi Aramco
for use in future orders.

IV- Technical Specification Example for Vertical Pump Suction Bell (Non-
pressure Retaining Part)
1- Specify the original and new materials.
Original casing material: NI-resist cast iron ASTM A436 Type 2.

New casing material: Same material.

2- Specify the required quantity

Quantity: 1

3- Use the pump datasheet to specify the pump parameters in paragraph 5.3.7.
Pump Parameter
i- Pump speed = 1800 rpm
ii- Pump driver HP Rating = 15 HP
iii- Pump fluid specific gravity = 1.0
iv- Pump liquid temperature = 90°F

Note:
Since none of SAEP-365 paragraph 5.3.7 limits are exceeded, contacting CSD to specify
additional testing is not required.

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 Document Responsibility: Standards Management Committee SAEP-365
Issue Date: 11 July 2021
Next Revision: 11 July 2023 Machinery Spare Parts Reverse Engineering

4- Specify the casing weight

Approximate part weight = 20 Lbs.

5- Indicate the pump service

Service: Waste water (no H2S)

Note:
If the service is sour (H2S is present), hardness test shall be conducted and shall meet ISO
15156. Since this is not a sour application (no H2S), hardness test is not required.
6- 3D measurement is not required.
7- Include the following statement for Dimensional Tolerances:
The manufacturer shall ensure that the final product meets the below
required tolerances. Special focus shall be given to inlet vane thickness and
outside wall thickness, and overall part shape:
I. Vane angels shall be 90 ± 2 degree.
II. Unless otherwise agreed with purchaser, the tolerances for the general
casting wall thickness shall be +3/-1 mm.
III. The general tolerances for general machined surfaces shall not be
more than 0.05 mm (0.002 in) and the tolerances for general machined
length shall be ±1.0 mm. Critical clearance and interference fits, shall
be as indicated in below drawing.
IV. Ensure that all radial machined surfaces are concentric.

© Saudi Arabian Oil Company, 2021 Page 35 of 37

Saudi Aramco: Company General Use

 Document Responsibility: Standards Management Committee SAEP-365
Issue Date: 11 July 2021
Next Revision: 11 July 2023 Machinery Spare Parts Reverse Engineering

V. Critical clearance and interference fits as shown in the below drawing

shall be:
A = 10 in + 0.00x/-0.00y
B = 6 in + 0.00x/-0.00y
C = 3 in + 0.00x/-0.00y
A
C

B
8- Attach Inspection Form 175-791200. The manufacturer shall meet all the
inspection and testing requirements applicable to a non-pressure retaining
parts as specified in this PO technical specification and Inspection
Requirement Form 175-791200.
9- State that machining of parts shall be done at a Saudi Aramco approved
facility under 9COM # 6000011675. The spare part manufacturer shall refer
to Saudi Aramco MSSD for list of approved facilities if machining will not be
done in-house.
10- Include the following testing requirements for welds.
If welding is done, all welding repairs and post weld heat treatment shall
conform to the original material inspection of the casting. All welding
procedure specifications, performance qualification records, and weld map
documents must be available for the purchaser inspector review upon his
request.
11- Casting surfaces shall be cleaned by sandblasting, shot blasting, chemical
cleaning or other standard method to meet the visual requirements of MSS-

© Saudi Arabian Oil Company, 2021 Page 36 of 37

Saudi Aramco: Company General Use

 Document Responsibility: Standards Management Committee SAEP-365
Issue Date: 11 July 2021
Next Revision: 11 July 2023 Machinery Spare Parts Reverse Engineering

SP-55. Mould-parting fins and remains of gates and risers shall be chipped,
filed, or ground flush.
12- Include pictures of the original part.

13- The engineering drawings shall be developed by the vendor based on a

provided sample. The ownership of the drawings shall belong to Saudi
Aramco. The vendor shall provide the full detailed drawings to Saudi
Aramco for use in future orders.

© Saudi Arabian Oil Company, 2021 Page 37 of 37

Saudi Aramco: Company General Use