Pipe
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ASTM A234 WPB & WPC PIPE SIPETING E aofia ai tuliloa, tee, sosolo
O lenei faʻamatalaga o loʻo i ai i le carbon carbon steel ma alloy uʻamea masani o le le gaoia ma le faʻaaogaina o le fausiaina. O nei mea faigaluega e mo le faʻaaogaina i le oona o le paluga ma i totonu o le faʻasoesa o le osofaʻiga mo le tautua i le tau feololo ma maualuga le vevela. The material for fittings shall consist of killed steel, forgings, bars, plates, seamless or fusion-welded tubular products with filler metal added. Forging or shaping operations may be performed by hammering, pressing, piercing, extruding, upsetting, rolling, bending, fusion welding, machining, or by a combination of two or more of these operations. The forming procedure shall be so applied that it will not produce injurious imperfections in the fittings. Fittings, after forming at an elevated temperature, shall be cooled to a temperature below the critical range under suitable conditions to prevent injurious defects caused by too rapid cooling, but in no case more rapidly than the cooling rate in still air. The fittings shall be subjected to tension test, hardness test, and hydrostatic test.