... :stainless steel certificate:ISO9001 and bv stainless steel 180 degree elbow Stainless Steel ElbowStandardASME SA403,BS16.9,GB12459,EN,DIN,JISMaterial304 ... )Pressure Class150LB, 300LB, 400LB, 600LB, 900LB,1500LB, etc.TypePlate type Flat Welding Flange,Slip on Neck Flange,Welding Neck Flange,Blind ... '')ThicknessSCH5~XXSOur company certificate:contact way: stainless steel 180 degree elbow