... , Certificate: ISO9001, API 5L 1, Seamless carbon tubes2,OD:20-325mm3, W.T.:2-50mm4, Certificate: ISO9001, API 5L ... plate, seamless steel pipe, thick wall steel pipe, round steel, square tube, rectangular tube.Products: pipe: (GB/T8162-2008): (GB/T8163-2008), ... -6121594.5-612168612180612194612203612219612140-2197-109-11140-21912-207-9Note: 10#, 20#3, 30#, 45#, 16MN, 27SIMN, 37MN5, 35MN2V, 42CRMO, 40CR ...