Pyp toebehore
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ASTM A234 WPB & WPC Pipe -toebehore, insluitend elmboë, tee, verkleiners
Hierdie spesifikasie dek smeedkoolstofstaal- en legeringsstaal -toebehore van naatlose en gelaste konstruksie. Hierdie toebehore is vir gebruik in drukpype en in die vervaardiging van drukvat vir diens by matige en verhoogde temperature. 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. Die vormingsprosedure moet so toegepas word dat dit nie skadelike onvolmaakthede in die toebehore sal veroorsaak nie. 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. Die toebehore moet aan spanningstoets, hardheidstoets en hidrostatiese toets onderwerp word.