... :stainless steel certificate:ISO9001 and bv stainless steel 180 degree elbow Stainless Steel ElbowStandardASME SA403,BS16.9,GB12459,EN,DIN,JISMaterial304 ... Flange,Slip on Neck Flange,Welding Neck Flange,Blind Flange,Socket Welding Flange,Thread Flange,Screwed Flange,Lap Joint Stainless Steel ... '')ThicknessSCH5~XXSOur company certificate:contact way: stainless steel 180 degree elbow