Boiler pipe

Boiler pipe main steel 20G、15CrMoG、12Cr2MoG、12Cr5MoG、12Cr9MoG、T11、T22、T5、T22、T9、T91 production standard GB5310《seamless steel tube for high-pressure boiler》 ASME SA213《Seamless ferrite and austenitic alloy steel tube for boiler, super heater and heat exchanger》

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