... , JIS, UL for structure, fluid, conduit, sprinkler system,fence tubing galvanized pipe, including ERW and Seamless, round and rectangular or square ... , Wall thickness:0.8mm---20mm. PURPOSE: fence tube, structural tube, scaffolding tube, water transferring tube, oil pipe, casing pipe, sprinkler fire ... tube and so onCERTIFICATE: ISO9001, UL, FM, CE,JIS,API galvanized pipe