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ASTM A234 WPB & WPC trubkasi, shu jumladan tirsaklar, tee, qizilchalar
This specification covers wrought carbon steel and alloy steel fittings of seamless and welded construction. These fittings are for use in pressure piping and in pressure vessel fabrication for service at moderate and elevated temperatures. Fitinglar uchun materiallar, o'ldirilgan po'latdan, kechirishlar, panjara, plitalar, plitalar, plitalar, plyonkali payvandlangan naycha mahsulotlardan iborat bo'lishi kerak. Shlaklar yoki shakllantirish operatsiyalarini bolish, bosish, pirsing, ekish, ko'tarish, egilib, ko'tarish, siljish, siljish, ishlov berish, ishlov berish yoki ushbu operatsiyalarning ikki yoki undan ortiq kombinatsiyasi bilan amalga oshirilishi mumkin. 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. Armatura kuchlanish sinoviga, qattiqlik sinovi va gidrostatik testga duchor bo'ladi.