... , GB0.8-12mm,19-275mmMainly used in petroluem,chemical,power,gas,water,shipbuiding,construction,etcLow & mid-pressure Boiler PipeCr5Mo, Cr9Mo, 15CrMo ... ,Q345,etcGB,ASTM20-426mm,0.5-10mmMainly used in petroluem,natrual gas and heating pipelineStainless Steel AngleSS400-SS540 SeriesASTM,JIS,GB,EN3 ...