Pipa pipa
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Astma A234 WPB Pipe & WPC FPC kaasup siku, tee, réduksi
Spesifikasi ieu nyertakeun bata baja karbon sareng alooy nyita bittings anu mulus sareng dikelungsi. Ieu mangrupikeun pake kanggo pakep tekanan sareng dina hutan tekanan pikeun jasa dina sistem sedeng sareng suhu. 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. Kacilakaan kedah subjek pikeun uji tegangan, tés karasa, sareng test hidrostatik.