Standard Number: YB/T 4173-2021(YB/T4173-2021)
Chinese:高温用锻造镗孔厚壁无缝钢管
English:Forged boring thick-walled seamless steel tubes for high temperatures
Effective Date:2022-04-01
Standard Applicability:This document specifies the size, shape, weight and permissible deviation, technical requirements, test methods, inspection rules, packaging, marking and quality certificate of forged and bored thick-walled seamless steel pipe for high temperature. This document applies to the manufacture of high-pressure and above pressure steam boiler, pipeline seamless steel pipe.
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