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Painting Procedure Document No.: P-04
Document Title : Painting Procedure
Document No. : P-04
Client : EL KHARAFI NATIONAL
Contractor : E.I.M.
QC Engineer QC Manager
0 10/3/2011 Review
Rev. Date Issue for Prepared by Checked by
Client
E.I.M.
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Date: 10/3/2011
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Painting Procedure Document No.: P-04
Content:
1. Scope
2. Codes and Standards
3. Surface Preparation
4. Coating Application
5. Quality Management and Control
6. Documentation
7. Inspection
8. Acceptance Criteria
9. Certification
10. Attachments
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1. Scope:
This Procedure set out preparation, application & inspection requirements for painting
and protective coating of (Platforms, staircase, penthouse, ladders, handrails, steel
structure, etc.).
2. Codes and Standards:
Code Standard
ISO 8501-2 Preparation of steel substrata before application of paint
SSPC Steel Structures Painting Council
SP.CO Surface preparation specification committee
3. Surface Preparation:
Prior to blasting, the surfaces that are not to be coated (e.g. markings, Designation
plates, flange faces, sight glasses) shall be appropriately Protected.
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The surfaces to be coated shall be free from contamination (e.g. welding slag,
welding spatter, dust, oil, grease salt, mill scale, laitance, rust, old coatings).
Surface defected (e. g. cricks, lamination, burrs, pitting). Shall be removed by
suitable methods. Sharp edges (e.g. saw cuts, oxygen cutting). Shall be adequately
rounded by grinding.
Standard designations according to
Preparation grade
EN, DIN, ISO, SSPC
Thorough wire-brushing or power tool
grinding St 3 SP3
Light blast cleaning Sa 1 SP7
Thorough blast cleaning Sa 2 SP6
Very thorough blast cleaning Sa 2½ SP10
Blast cleaning to pure metal Sa 3 SP5
SSPC = Steel Structure Painting Council, USA
Blasting materials shall be stored in a dry place and carefully covered. Blasting
work shall be performed with out impending the activities of other contractors.
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After blasting, the blasting material shall be properly removed from the cleaned
surface (e.g. by vacuum cleaner, compressed air, brush).
After the work has been finished the working area shall be cleaned, And the
blasting material removed.
Surface cleaned according to preparation grade Sa 2½ shall be coated within 6
hours, surfaces cleaned according to preparation grade Sa 3 within one hour.
cleaned surface on which a rust film has formed shall be re-blasted by the
Specified methods.
4. Coating application:
4.1 Climatic Condition:
Humidity not more than 80%.
Maximum allowed steel temperature for paint application not more than 50 oc.
Minimum allowed steel temperature for paint application not less than 4 oc.
Steel temperature to be minimum 3oc higher than the recorded dew point.
Windy & rainy condition should stop painting activities.
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4.2 Coating materials and equipments:
The contractor shall insure that all the regulations regarding health protection and
occupational safety are observed during the performance of the surface
Preparation and coating work and during the use the selected coating materials.
Environmental protection regulations of local authorities shall also be observed.
Document concerning the surface preparation and coating system / coating
material, with information in relation to:
Coating work
Requirements
Supervision
Properties / characteristic
Miscellaneous
control surface
The color of each coating, edge protection included, shall be different. The color
of the last undercoat shall be hidden by the top coat.
The performance of the surface preparation and coating work shall be supervision
during all the work operation. The supervision personnel shall be suitably
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qualified and experienced. The contractor for the relevant assemblies shall be
responsible in this connection.
The location of the control surface for the relevant assemblies shall be selected by
all the contracting parties together.
All surface preparation and coating work on control surface shall be performed in
the presence of representative of all contracting parties, who shall confirm that the
control surface conform to the specification.
The contractor for the coating systems shall comply with local regulations on
health protection and occupational safety in relation to the use of solvents and
coating products.
Surfaces to be coated shall be dry and free from contamination; the surface
temperature shall be at least 3 C above the ambient air during coating.
The coating materials shall be applied with a uniform thickness.
Corners, edges, bolt heads ,etc., which are difficult to reach shall be pre-coated
with small brushes.
Suitable equipment shall be used for spray application.
Rollers must not apply prime coats.
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To avoid defects of the coating (e.g. blisters, pores, inclusion of thinner, bulling of
thinner ) and changes of the intervals between coats ,the surface temperature
should be in the range recommended by the paint manufacturer during coating
,hardening ,and curing of the coating materials
Prior to any others test, the coating shall be subjected to a visual check should be
limited to coaling defects (e.g. spray dazzle ,areas left uncoated ,inclusions of dirt
, blisters , porosity ,sags ,tears ,brush marks).Areas in which the blasting material
has remained under the coating shall be blasted again and recoated.
The wet film thickness shall be measured on a random basis with a comb-type
gauge immediately after applying the coating material.
The dry film thickness shall be measured after adequate hardening or curing of
the coating. (Calibration of gauge according to equipment manufacture).
To observe the specified total film thickness, the thickness of each individual
layer should be measured. .(measurement according to SSPC.)
Storage containers of coating material should be in dry, good ventilation rooms,
with temp (5-23oC) and as recommended by coating manufacturers.
Coating material shall contain no lead, cadmium or chromate.
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4.3 Personnel:
Qualified blasters & painters to be involved in paint activity.
4.4 Supervision:
Qualified paint inspector to supervise paint activities and to advise for normal and
trouble painting issues.
4.5 Painting System:
Blasting: according to ISO 8501-1: SA 2 ½.
Painting:
Applying Primer Coat, Zinc dust / Ethyl Silicate, 75 Microns DFT before
Fabrication for all carbon steel and touch up on weld joints and heat affected
zones.
o NOTE: All surfaces to be welded in site must be no painted, but protected with weld
able primer; all friction (contact) surface of bolted connection must be only painted
with primer (inorganic zinc primer).
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5. Quality management and control:
The quality control, quality assurance and recording arrangements shall comply with ISO
9002 and shall be the responsibility of the contractor performing the coating work for the
relevant assemblies.
Neutral control by external bodies shall be provided for the individual assemblies and
shall be agreed with the relevant painting contractor prior to the individual coating
operations.
6. Documentation:
The quality assurance documents shall be as follows individually for each coat film :
Standard data sheets for the specified coating system for each coat film.
Standard form for the reports on corrosion-preventive work for the selected
control Surfaces..
Technical Data Sheets relating to the coating materials specified.
Safety Data Sheets of the coating material specified.
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7. Inspection:
The painting quality control inspector shall make sure form the following:
The sandblasting is carried out in accordance with the relevant standards and the
client specification.
The proper Cleaning had done before applying the coat to remove the blasting
material from the cleaned surface (e.g. by vacuum cleaner, compressed air)
There are no any surfaces without covering.
Check wet film thickness (W.F.T).
Check dry film thickness (D.F.T).
In addition the following inspection shall be done in random way; (Ref. to client
spec. & I .T. P)
Checking visually for uniformity, coverage any damages and flaws.
H. Acceptance criteria: Refer to manufacturer data sheet & client specs.
8. Certification:
All consumable certificates validity will be guaranteed upon individual Batch
number which will be used during application.
9. Attachments:
Painting Inspection Report.
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