Potrubie
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Táto špecifikácia pokrýva kvantnú uhlíkovú oceľ a zliatinové oceľové armatúry bezšvovej a zváranej konštrukcie. These fittings are for use in pressure piping and in pressure vessel fabrication for service at moderate and elevated temperatures. 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. Postup formovania sa musí uplatňovať tak, že v príslušenstve nebude spôsobovať škodlivé nedokonalosti. 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. Prípravky musia byť podrobené testu napätia, testu tvrdosti a hydrostatickému testu.