Flange Fitting Color Band Requirements According to BS381

1. MARKING OF PIPING MATERIALS Marking shall generally be accomplished by either one or a combination of casting-out, forging-out, punching, stenciling, tagging, labeling and taping. Punching or die stamping if used shall be low stress stamps (dot or round bottomed) with at least 6 mm high. Stenciling color shall be black; however, for piping components whose surfaces are black or dark, it shall be white. 2. COLOR STANDARD BS 381C color standard shall be used. For piping commodities, which require PMI (Positive Material Identification), Marking and color-coding shall be done only after the successful completion of PMI on the final product. Paint shall be resistant to salt water atmosphere and tropical climate, and be durable and of a distinctive identifying color. It shall not cause corrosion of the material to which it is applied, neither during storage and construction, nor during operation of the equipment. Paints and markers shall not contain harmful metals or metal salts such as Zinc Aluminum, Lead or Chlorides, sulphur or other halogens that may be harmful to the alloy. Color coding marks shall not obliterate any other markings required by COMPANY General Specifications, International Standards, codes, applicable local laws and regulations. 3. METHOD OF IDENTIFICATION. The following color codes for Bulk Piping Materials shall be applied Carbon Steel ( Non -Sour Service) None None Carbon Steel – Sour (Pipes, Fittings, Flanges) Salmon Pink 447 Stainless Steel (Pipes, Fittings ,Flanges) Rail Red 593 Duplex Stainless Steel (Pipes, Fittings, Flanges) Light Orange 557 ASTM A 193 Grade B7M (Stud bolts) Lemon 355