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By certification 
size Seamless:from 1/2"-24",Welding: 24"--72"
Type con & ecc
thickness SCH20,SCH30,SCH40,STD,SCH80,SCH100,SCH120,SCH160,XXS
standard ASME B16.9 DIN2616 JISB2311 JISB2312 JISB2313, BS, GB, ISO
material Alloy steel(ASTM A234 WP12,WP11,WP22,WP5,WP9,WP91, ect)
qualification ISO9001 API CE
packing Wooden case&pallets
Application Petroleum, chemical, machinery, electric power, shipbuilding, papermaking, construction, etc
Equipment Press machine,Bend machine,Pushing machine,Grooveing machine,Gush arenaceous,etc,etc
Testing direct reading spectrometer,Hydrostatic test,X-Ray flaw detector,Ultrasonic flaw detector,Magentic particle inspection,etc
Special design available as the requirement of customer
Type con & ecc
thickness SCH20,SCH30,SCH40,STD,SCH80,SCH100,SCH120,SCH160,XXS
standard ASME B16.9 DIN2616 JISB2311 JISB2312 JISB2313, BS, GB, ISO
material Alloy steel(ASTM A234 WP12,WP11,WP22,WP5,WP9,WP91, ect)
qualification ISO9001 API CE
packing Wooden case&pallets
Application Petroleum, chemical, machinery, electric power, shipbuilding, papermaking, construction, etc
Equipment Press machine,Bend machine,Pushing machine,Grooveing machine,Gush arenaceous,etc,etc
Testing direct reading spectrometer,Hydrostatic test,X-Ray flaw detector,Ultrasonic flaw detector,Magentic particle inspection,etc
Special design available as the requirement of customer
