Poly Urea Coating
Painting specification for the project is given by PMC or Client in FEED or BEP. It is updated by material engineer on the project. Engineering firm can use its own standard painting specification if allowed by client.
Preparation of painting specification involves understanding environmental factors, location of piping (indoor or outdoor), insulation requirements, operating and design temperatures. It may also involve local rules and regulations as well as availability of materials.
Applicability of Standards
Painting Specification is prepared by Material Engineer to assure high quality painting work on the project as per international standards. Various international codes and standards should be followed for painting.
Painting Workflow
Ensure all tests are performed on piping system before starting painting work.
Clean painting surface to remove oils, grease, dirt.
Ensure proper room temperature and humidity levels.
Use hand tools, machine tools, shot blasters etc. as per standards.
Apply primer within 4 hours of surface preparation.
Apply paint coats after previous coats have dried as per manufacturer instructions.
Components Requiring Painting
Un-insulated carbon steel pipes, fittings, valves, special items etc. require painting
Carbon steel ducts, furnaces and stacks require painting.
All un-insulated equipments like columns, vessels, drums, heat exchangers, pumps, compressors, electrical panels, motors etc. require painting.
All structural componets like steel members, platforms, ladders,handrails etc. required painting.
Insulated Lines and Equipments
Painting of markings over insulation cladding is required on all piping for identification of lines. In some cases, painting under insulation is also required for carbon steel piping.
Plastic Piping
Plastic or plastic coated components do not require painting. Identification markings may be applied on plastic piping when required.
Stainless Steel Piping
Stainless steel piping is not painted. Identification marking may be applied on this piping.
Paint Quantity Estimation
Quantity of paint required to achieve the specified Dry Film Thickness (DFT) depends on various application and surface factors.
Surface Preparation
Piping and equipment components may rust over time. Rust must be removed before painting, following grades defined by the Swedish Corrosion Institute.




