Standard Number: YB/T 4837-2020(YB/T4837-2020)
Chinese:超（超）临界高压锅炉管用连铸圆管坯
English:Continuous casting round billet for ultra (super) critical high pressure boiler tube
Effective Date:2021-04-01
Standard Applicability:This standard specifies the super (ultra) critical high pressure boiler tube with 9% -12% Cr series steel continuous casting round billet order content, size, shape and weight, technical requirements, test methods, inspection rules, packaging, marking and quality certification. This standard applies to the center of the center drilling after rolling or center extrusion punching after pipe making process manufacturing seamless steel pipe billet.
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