1) standard: din2448, din1629, din17175, en10255, en10216 2) grade: st37, st44, st45, st52, s355jr 2) size: from 1/2" to 32", 3) wall thickness: 2-60mm 4) length: 4m to 12 m St52-3|st50-2|st60-2|st70-2|structural steel plate Packing 1) packing in bundles, 2) surface: varnish coating 3) ends: beveled or square cut, plastic capped. 4) the pipes also can be 3pe or fbe or galv. Coated. Inspection & certification 1) certification: iso, api, astm, din etc. 2) mill test certificate: en10204/3.1b 3) third party inspection: sgs, bv, lloyds etc. We are a great manufacturing corporation in china, specializing in seamless steel pipe, welded steel pipe and galvanized steel pipe. Company through the iso9001 certification, we can produce according to the customer's demand.