PAINTING INSPECTOR HANDBOOK THIS HANDBOOK IS COMPILED TO ASSIST PAINTING INSPECTORS AND SUPERVISORS ON THE QCS ONSHORE FACILITIES PROJECT
Golden Rules for Blasting & Painting Before start of any Blasting or Painting activities, weather condition should be: Relative Humidity < 85, Surface temperature at-least 3º C and 5º F above Dew Point. Surface to be blasted should always be, free from oil, grease and other contamination. Prior to blasting, check for compressed air, if free from water, oil etc. Protect the areas not to be blasted / painted prior to blasting & painting. (E.g. Tags, Flanges faces & Bevel ends etc...) Mixing of Paints to be done using proper measuring jars to get the correct ratio as per manufacturers recommended quantities only. Before applying paints, strip coat the areas required. Maintain correct WFT as per requirement to avoid rework / Low DFT. Maintain the over coating interval as per requirement. Ensure paint surface to be visually good and free from runs, sags, wrinkles etc... All Records to be compiled and completed after completion of Painting for Final DFT Check & Holiday check.
References: ASTM D 3276
Standard Guide for Painting Inspector
ISO 8501 BS 7079
Preparation of steel substrates before application of paints and related products – visual assessment of surface cleanliness
SIS-05-59-00 (Swedish Standard)
Rust grades and preparation grades of uncoated steel substrates and of steel substrates after overall removal of previous coatings.
SSPC PA-1
Shop, Field and Maintenance Painting Application Specification
SSPC PA-2
Measurement of dry paint thickness using Magnetic gauges.
SSPC PA-3
A Guide to Safety in Paint Application
SSPC-Vis 1
Visual Standard for Abrasive Blast Cleaned Steel
Inspection prior to Blasting Quality All inspection for blasting & painting shall be in accordance with Inspection and Test Plan. All Spools / Pipes released for Painting/Coating should have Identification Tag, Spool No and Drawing numbers duly filled. Check the Surface prior to blasting for mechanical damages (like spatters, slag’s etc.) Check the Surface to be free from oil, grease and other contamination. Ensure before the start of blasting, the weather temperature whether suitable for blasting. Check for compressed air, if free from water, oil etc. Protect the areas not to be blasted. (E.g. Tags, Weld Joints, Flanges faces & Bevel ends etc...). High Pressure water washes to remove salt and other contaminations. Stop Blasting activity if dusty wind, rain or likely for the change of bad weather. Abrasive used shall be as per the required specification. Strictly!!! No reuse of Abrasives in Open Blast condition. Check the Blasting Nozzle Pressure – Supervisor / Charge-hand in Charge Ensure the Batch Certificate copy of Abrasive used at the Site office or yard. Painting Supervisor is responsible for all activities.
Safety Warning Signs/Caution Tape must be exhibited and regular inspection of equipment must be carried out. Other Safety Points relating to equipment are: Carbon Impregnated hose to be used to reduce static shock. Deadman’s handle to be used. Regular check of Hoses used. Personal Protective Equipment to be worn. Personal should be present at the Blasting Pot and Compressor at all times. Painting Supervisor / Charge-hand is responsible for all activities. Inspection after Blasting All blasted surface should be inspected for proper cleaning. Visually check for any mechanical damage/lamination. If found Visual standards may be used for confirming the degree of surface cleanliness. Check the surface preparation for any contamination. – Cello Tape Test. Chloride Test to be carried out, if required. Surface Profile Test shall be verified by using either course or extra course replica Tape. Record to be maintained after blasting Inspection is carried out. Painting Inspector is responsible for all activities. Shifting/ Handling of Blasted Spools / Pipes Blasted Spools/Pipes should be shifted/handled carefully, to avoid any damage, rework and other contamination. Painting Supervisor/Painting Inspector is responsible. Inspection Prior to Painting. Surrounding areas to be covered to prevent overspray. Area to be masked properly. 50mm (2”) for above ground and 75mm for underground. Ensure painting system as per specification. Paint will be mixed and prepared in accordance with the approved manufacturer instructions. Mixing of Paints to be done, using proper measuring jars to get the correct ratio as per manufacturers recommended quantities only. Homogenous mix, properly mixed, no lumps or solid left. TIP size and spraying procedure (when sprayed) shall be adhered. Solvent dilution shall be used on to aid application/painting in accordance with the manufacturer instruction and recommendations. Before applying paints, strip coat the areas required. Ensure that the Paints, Curing Agent, Thinner used are within the Shelf Life and from the same manufacturer.
Weather Condition to be checked and recorded.
Application of Paint. Paint applied shall be as per specification and related paint system. Paint mixed, agitated used shall be applied within the specified Pot Life. Paint shall be applied to ensure an even coating thickness at overlapping passes and to achieve the specified dry film thickness. WFT spot check to be carried out to achieve required DFT. Maintain the over coating interval as per requirement “STOP” painting activity if dusty wind, rain or likely for the change of bad weather. Ensure Proper coating system applied during Intervals. Completion of Paint Ensure paint surface to be visually good and free from runs, sags, wrinkles etc... Record to be maintained after Painting. Subcontractor Painting Inspector and CTJV supervisor shall inspect or test a product. Only after acceptance or satisfaction Request for Inspection shall be raised. On acceptance from the Company & CTJV the coated/painted spools or pipes shall be released to subsequent processes. Transportation of Painted Pipes Proper care shall be carried out while shifting, handling and transportation of coated pipes to site. All coated pipes should be stacked on wooden skids. All damage and weld areas shall be pained as per specification.
Storage All materials shall be stored as per manufactures recommendation. Materials stored shall be as per FIFO. Final Inspection All final test and inspections shall be conducted by subcontractors and shall be witnessed by CTJV/QG Inspectors in accordance with project specification. During final inspection all documents and records should be available with the subcontractor for verification. For U/G piping backfilling shall be carried out immediately after the completion of Holiday testing.
General Requirements Blast Cleaning Standards
Degrees of Blast Cleaning
SSPC
SP1
Solvent Cleaning
SSPC
SP2
St 2
Hand Tool Cleaning
SSPC
SP3
St 3
Power Tool Cleaning
SSPC
SP5
Sa 3
White Metal Blast
SSPC
SP6
Sa 2
Commercial Blast
SSPC
SP7
SSPC
SP10
SSPC
SP11
Brush-off Blast Sa 2 1/2
Near White Metal Power Tool Cleaning to bare steel
Specification for Painting Coating System Description CS - AA Shop / Field Application of Coal Tar Epoxy for Carbon Steel External CS - AB Shop / Field Application of Epoxy for Hot-dip Galvanized Steel External CS – AC Shop / Field Application of Epoxy for Austenitic Stainless Steel External CS – B Cold Applied Tape Wrap C–1 Tape Application for Elbows C–2 Tape Application for Branch Connections C–3 Tape Application for Flanges C–4 Tape Application for Post Indicator Valves System AA (Shop / Field)
Spec SP10 st 1 Coat
Brand Name
DFT (Mic)
Colour
Hempadur 15130
200
μ
Brown
Finish
Hempadur 15130
200
μ
Black
Reference to some of the painting requirement & colour coding is attached. For further details and more information please refer to the project specifications.
