COVER PAGE

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 ADDITIONAL AGREEMENT/APPROVAL RECORD

Party Ref Ind. Name Sign Date

Project Lead

Project Engineer

Revision Philosophy

 Revisions for review will be issued at R01, with subsequent R02, R03, etc. as required.

 All revisions approved for issue or design will be issued at A01, with subsequent A02, A03, etc as required.

 Documents approved for Construction will be issued at C01, C02, C03, etc as required

 Documents or drawings revised as “As built” will be issued as Z01, Z02 Z03 etc as required

 Narrative sections revised from previous approved issues are to be noted in the table below and/or
highlighted in the RH margin (using the appropriate revision status) thus: A02

 Previous revision highlighting to be removed at subsequent issues.

 Drawings/diagrams revised from previous approved issues are highlighted by 'clouding' the affected areas and
by the use of a triangle containing the revision status.

 If a document is cancelled the document will be issued at the next sequential number and suffixed with a X.
For example, if 02R is the current revision then 03X will be the Cancelled revision
 All revisions to this document must be approved by the relevant Technical authority

Revision History

Revision No. Date of issue Document ID/Reason for change

R01 Issued For Review And Comment

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 TABLE OF CONTENT

1.0 INTRODUCTION........................................................................................... 4
2.0 PURPOSE …………………………......................................................................... 4
3.0 STATEMENT OF THE WORK......................................................................... 4
4.0 REFERENCES………........................................................................................ 4
5.0 SCOPE OF WORK ……………………………………………………………………………………. 4 - 5
6.0 PAINTING EXECUTION SEQUENCE............................................................... 5 - 10
7.0 KEY PERSONNEL and MAJOR EQUIPMENT.................................................. 10
8.0 PAINTING SYSTEM....................................................................................... 11

ATTACHMENT

PAINTING INSPECTION REPORT …………………………………………… 12

GRIT BLASTING REPORT ………………………………………………………. 13

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1.0 INTRODUCTION
This blasting & painting procedure for BOGT Produce Water Inline Meter Installation (SPDC- Bonny Oil &
Gas Terminal) is intended to explain the coating steps to be implemented by Step II International Nigeria
Limited during the blasting and painting of the fabricated carbon steel components. The procedure shall
take cognizance of applicable codes, standards, SPDC DEP 30.48.00.31 and AFC drawings.
The blasting and the subsequent painting shall be carried out by experienced blaster and spray painter.
The painting shall be accomplished utilizing airless spray-gun process. However, repair painting shall be
effected by hand brushes.
Coating materials such as paint, thinner to be used shall be the approved and shall be applied in
accordance with the manufacturer’s recommendations. All paints shall be thoroughly mixed to attain
uniformity before application. The mixing shall be achieved by mechanical agitation and shall be
stirred intermittently to maintain consistency.

2.0 PURPOSE
The purpose is to ensure that painting and blasting steps followed is consistent with quality requirements
and the components are fit for purpose. This procedure is also to assist and enhance the good
workmanship of the blasting and painting team to achieve high quality requirement of the piping
component.

3.0 STATEMENT OF WORK

The works to be carried out are blasting and painting of fabricated carbon steel components. To
achieve the above objective, careful studies and technical preparation has been made to enable the
execution of the painting process in a safe manner.

4.0 REFERENCES
 DEP 30.48.00.31 – Protective coatings for onshore and offshore facilities.
 SSPC – SPID – Near white metal blasting technique.

5.0 SCOPE OF WORK

The scope of work shall consist of all activities to be executed by Step II anti-corrosion team to effect the
protective coating on the fabricated carbon steel components. The scope of work shall include but not
limited to the following:
 Blasting of the fabricated carbon steel components.
 Priming of the blasted carbon steel components.
 Application of intermediate coat paint.
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  Application of the finished or final coat Paint.
 Measurement of DFT achieved for each of the coating.
 Painting report.

6.0 PAINTING EXECUTION SEQUENCE

Prior to commencement of the blasting and painting operation the following checks should be made:
 The paint manufacturer’s recommendations to be examined and followed with respect to
quantity, mixing and application of the coating to achieve the requirements of the client’s
specifications.
 The requirement of the contract, the coating system, shall be duly followed.
 That all paints and coating materials supplied shall be in good condition.
 The product and safety data sheets are available and the paint is within its shelf-life. The
paint is stored in a secure and adequately ventilated container at approximately 20oC.

6.1 Preparatory Work

Prior to blasting and painting process of the pre-fabricated components, the following action
shall be performed sequentially:
6.1.1 Move prefabricated components to painting bay and arranged on the stands.
6.1.2 Setup the blasting equipment and tools.
6.1.3 Check weather conditions and take record of temperature, humidity.
6.1.4 Assemble the paint materials (primer).
6.1.5 All items to be blasted will be free from oil, grease and other contaminant prior to
blasting.
6.1.6 All weld spatter and sharp protrusions must be removed.
6.1.7 Blasting shall only to be carried out when the temperature of the steel surface is
more than 3°C above dew point.
6.1.8 All blasted surfaces remaining overnight or for more than 4 hours without been
primed shall be re-blasted before application of primer.

6.2 Surface Preparation

6.2.1 Blasting of the components
 The blasting will be carried out when it is certain that weather is conducive and
there is no imminence of rain or showers.
 The mills scale, rust and defective paints work shall be removed using blast.

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  Because it is a new construction and complete coating, Blast clean to Sa 3 –ISO
8501-1(near white SSPC-SP10).
 Abrasive for use in blast cleaning carbon steel and low alloy steels specified in ISO
8504-2 that are suitable:
 Chilled iron grit and shot.
 Steel and malleable iron grit and shot.
 Non-metallic abrasives (Aluminium oxide, copper, slag etc.).
 The coating inspector shall confirm that the abrasives used are the correct type
and size as stated in the project specification.
 The blasting air shall be devoid of moisture and or oil. This shall be checked prior
to commencement of blasting.
 The compressor air lines shall be fitted with oil and moisture traps and water
injections means and blasting will be performed by competent blaster.
 The structure shall be blast cleaned to SA 3 quality level according to ISO 8501
standard. On completion of the blasting, the blasted components shall be cleaned
thoroughly with compressed air to remove all blasting dust.

6.3 Priming/Painting
Paints shall be mixed by rotating power tools, vibrators or rolling rigs, until the solids are
distributed equally throughout the container.
An approved flow-cup shall be used in measuring the correct viscosity of the paint after
thorough mixing.
Paints visually showing deterioration such as setting, separation gelling shall be discarded.

6.4 Coating spray Sequence

6.4.1 Coating application shall be airless spray unless otherwise stated.
6.4.2 Blasting and power disc prepared surface shall be coated with the applicable coat within
four hours of cleansing operation.
6.4.3 All coating materials shall be thoroughly stirred with a power mixer for sufficient time to
thoroughly mix the pigments.
6.4.4 Any surface to be coated shall be rendered dust free before application of the coating.
This can be accomplished by blowing off the surface with clean dry air or by using
industrial vacuum cleaners.
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 6.4.5 During the application of each coat, all areas such as corners, edges, weld, small brackets,
bolts, nuts and interstices shall be pre coated by brush to ensure that these areas have
the minimum specified film thickness and to ensure adequate continuity of the coating
surface.
6.4.6 Drying/Curing period between successive coats shall be observed in accordance with
vendor’s Recommendations, taking prevailing environmental conditions into
consideration.
6.4.7 If a coating material requires the addition of a catalyst, the pot life under specific
applicable conditions shall be clearly stated on the label and shall not be exceeded.
When the pot life limit is reached, the spray pot shall be emptied, the material
discarded, the equipment cleaned and new material catalyzed.
6.4.8 When spraying, the personnel shall wear an air fed mask supplied with clean filtered air.
6.4.9 The spray gun shall be held no closer than 200mm or more than 600mm from the
surface to be coated and shall always be held at right angle to the surface. In application
of paint, each spray pass shall overlap the previous pass by 50%.
6.4.10 Coating with brush shall be used on areas which cannot be properly spray coated.
Surface not reachable by brush shall be painted by other suitable means to ensure a
uniform film of adequate thickness e.g. Roller.
6.4.11 BRUSHES APPLICATION:
 Where areas cannot be properly coated by spraying for any reason.
 For Touch-up or repairs to localised damaged or areas of incorrectly applied paints.
 For applying the initial coat of paint to corners, edges, crevices, holes, welds or other
irregular surfaces prior to spray application.
 Where the manufacturer considers the coating material suitable for brush application.
6.4.12 ROLLER APPLICATION:
 The total minimum dry film thickness: 300microns.
 Primer: 75, Intermediate coating: 150, Final coating: 75. Total: 300 microns.
 All the abrasive cleaning and coating application must be witnessed by SPDC Rep for
corrosion and painting.

6.5 Subsequent Coatings

Subsequent coatings shall be strictly in conformity with manufacturer’s recommended

durations and cure. Prior to additional coats, the components shall be inspected for
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condensation or contamination has occurred on the painted surface. Each coat applied must
be devoid of paint runs, sags or other defects and if any are present, they shall be repaired in
line with the SPDC painting specification prior to the application of the next coat.

6.5.1 Coat Thickness Measurements

Dry film thickness (DFT) of each coat shall be determined by taking minimum of
three readings on each components painted. The achieved DFT shall be recorded.

6.5.2 QA/QC Inspections

The company shall have the right to inspect the paint work at all stages and to reject
any tools, instruments, materials, equipment or work, which do not conform to the
specification.

On completion of each coat and all coats, the painted components shall be inspected
visually. Generally, each shall be check for defects such as holidays (bare spots) and lack
of good adhesion, paint runs, sag. Adhesion checks will be carried out on the first item
at the start of each new paint coating, by means of a cross-cut test in accordance with
ISO 2409.

To ensure that the final paint is free from obvious defects, the painting process shall be
closely monitored and subjected to various tests, such as wet and dry film thickness
tests, adhesion tests, etc. Painting Inspectors shall cross-check and examine by non-
destructive method the applied paint coatings and the weather conditions to ascertain
the quality of the coatings.

Proper surface preparation shall be performed. The surface shall be blast-cleaned to Sa

3 and/or power tool cleaned to Sa 3 and ISO 8501-1. A surface profile shall be attained
and measured non-destructively by a surface profile Comparator in accordance with
paint manufacturer’s specifications.

QA/QC personnel shall monitor paint mixing and mixing ratios. During paint application,
the required paint film thickness shall be built. Frequently, both the wet comb gauge
and dry film thickness gauge (Elcometer) readings shall be taken to verify the achieved
wet film paint and dry film thickness, respectively, in accordance with paint
manufacturer’s specifications. A minimum of five (5) readings shall be taken at random
for each 10m2 of coated surface. For a surface area less than 10m 2, a minimum of three
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 (3) readings shall be taken. Additional readings shall be taken if there has been any
change in application of equipment, spray nozzle sizing, thinning of parts, etc. No
painting/blasting operations shall be performed if the relative humidity is above 85%, or
if it is suspected that there could be rain within two (2) hours after paint application.
The relative humidity shall be determined with the Hygrometer or Dew Meter. No
coatings shall be sprayed onto surfaces in excess of 40 oC. All required Holiday Testing
shall be performed in accordance with ASTM D-5162.
Finished paint work shall have correct shade, degree of gross and evenness and be free
from tackiness after drying/curing and cracks, holidays, runs, sags, wrinkles, patches,
brush or roller marks, or other defect that may be deleterious to the quality of the
coating.
All the equipment/ instrument for the inspection shall be calibrated.

6.5.3 Repair Painting

Cracked paint work or areas found to be deficient in DFT shall be repaired using high
quality paint brushes. The edges of cracked paint work shall be sandpapered to
blend smoothly with undamaged areas prior to the painting touch-up.

7.0 PERSONNEL & EQUIPMENT LIST

7.1.1 PERSONNEL
The personnel listed below are essential to the safe and successful performance of
fabrication operation.
 Project Engineer
 QC Inspector
 Safety Officer
 Blaster
 Spray painter
 Helpers

7.1.2 EQUIPMENT
 150 psi Air Compressor
 600LB Blasting pot
 50mm Blasting hoses
 High pressure pneumatic pump

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  8Bar spray gun and hoses
 Hygrometer
 Thermometer
 Mixers
 DFT Gauge
 Blasting hood

8.0 PAINTING SYSTEM

The ambient temperature shall be above 40oC and relative humidity shall not exceed 85%
Grade of cleanliness Sa 3 (ISO 8501-1). Total DFT shall be as per the Table 7 of the DEP 30.48.00.31.
Paint
Dry film Relative Over coating Intervals
Manufacturer
thickness Humidity
(Microns). Min. Max.
Primer Interzinc 52 75 microns 85% International 4 hours Unlimited

Intermediate Coat Intergard 475HS 150 microns 85% International 16 hours

Unlimited
Finish Coat Interthane 990 75 microns 85% International 10 hours Unlimited

REPAIR SYSTEM MINOR

Grade of cleanliness Sa 3 (ISO 8501-1)
Paint
Dry film Relative Over coating Intervals
Manufacturer
thickness Humidity
(Microns).
Min. Max.
Primer Interzinc 52 75 microns 85% International 4 hours Unlimited

Intermediate Coat Intergard 475HS 150 microns 85% International 16 hours

Unlimited
Finish Coat Interthane 990 75 microns 85% International 10 hours Unlimited

Note: Final colour light NATIONAL/SHELL GREY WHITE colour.

PAINTING INSPECTION REPORT

PROJECT TITLE

DATE: LOCATION: REPORT NO:

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LINE NUMBERS:
DRAWING NUMBERS:
Environmental Condition AM(HRS) PM(HRS)
Time Readings Taken
Air Temperature (OC)
Relative Humidity (%)
Dew Point (OC)
Surface Temperature (OC)
Tool & Solvent Cleaning
Tool Type Tool Used Surface Cleaning Standard achieved

Paint Applications method

Airless
Application Method Brush Roller Others
Spray
Paint Coating Data
Paint Manufacturer
Item/Component Paint Batch No Application Time DFT Visu
Coat Paint Name
Identification Part A Part B Start Stop (µ) al

Thinner Batch No.

Inspection And Test Acceptance: Yes No

CONTRACTOR: STEP II INTERNATIONAL NIGERIA LIMITED CLIENT: SPDC

INSPECTED BY: Signature: INSPECTED BY: Signature:

POSITION: POSITION:

DATE: DATE:

QUALITY CONTROL CHECKS

1) Wet Film Thickness (WFT)
2) Dry Film Thickness (DFT)
3) Surface Contamination

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 GRIT BLASTING REPORT
S/NO. DRAWING NO. SPOOL NO. REMARKS

The above spools / lines have been inspected after grit/sand blasting and found satisfactory. Hence, the items are
released for painting. Checked after primer installation and satisfactory.
Steve Integrated SPDC REP
Name:
Sign:
Date:

Revision Document Prepared By Checked By Approved By Date Client’s

Status Approval

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