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Our production bases cover most of China, with a production capacity of 300,000 MT annually, Size range from Seamless pipe: O.D.6--325mm, W.T.0.8--25mm. (Cold Drawn Round Tube). O.D.141mm--610mm, W.T :5--25mm (Hot Rolled Round Pipe). 12mm-300mm*12mm-300mm*1.25-15mm(Seamless Square Tube) 25.4mm-100*70-100mm*1.25-7.0mm (Seamless Rectangle Pipe) Standard: 1, High pressure boiler tubes are mainly supplied as per GB5310-1995,and equivalent international standards : ASTM A106-96a ,ATSM A213-95a, ASTM A 210M, ASTM A 213M, JIS G3461-1988,JIS G3462-1998,DIN 17175-1979,DIN 1629, DIN 17121, BS3059:Part 2:1990 2, Low and medium pressure boiler tube usually supplied with standard: GB3087-1999 and equivalent international standards ASTM A179, ASTM A192, SA179, SA192, BS3059 3,Petroleum pipe API SPEC 5L, API SPEC 5CT Typical steel grade involved 20G,12CrMoG,20MnG,25MoG,20MoG,15CrMoG,12Cr1MoVG, 12Cr2MoWVTiB, 10Cr9Mo1VNb, St35.8, St45, St37.etc
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