... fertilizer equipment,high pressure boiler,low & mid-pressure boiler,etc.Stainless Steel Pipe300 SeriesGB,JIS,ASTM, DIN6-720mm, 0.5-65mmWidely ... , GB0.8-12mm,19-275mmMainly used in petroluem,chemical,power,gas,water,shipbuiding,construction,etcLow & mid-pressure Boiler PipeCr5Mo, Cr9Mo, ... ASTM,API5L2.1-110mm,10.3-508mmUsed in oil & gas fieldsWelded Steel Pipe10#,20#,45#,Q195,Q215,Q235,Q345,etcGB,ASTM20- ...