... PipeQ195-Q345ASTM, GB0.8-12mm,19-275mmMainly used in petroluem,chemical,power,gas,water,shipbuiding,construction,etcLow & mid-pressure Boiler ... N80,etcGB,ASTM,API5L2.1-110mm,10.3-508mmUsed in oil & gas fieldsWelded Steel Pipe10#,20#,45#,Q195,Q215,Q235,Q345 ... ,etcGB,ASTM20-426mm,0.5-10mmMainly used in petroluem,natrual gas and heating pipelineStainless Steel AngleSS400-SS540 SeriesASTM,JIS, ...