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