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seamless carbon steel pipe 1) Outer diameter: 1/4" - 12" 2) Wall thickness: SCH40 - SCH160 3) Standard: ASTM A106/A53GR.B, AS Hebei New Sinda Pipes Manufacture Co. Ltd. Our company is a large -scale manufacturing enterprise ,specialized in manufacturing pipes and pipe fittings .It was established in 1997,covering an area of 50,000 square meters ,of which workshop covers 5,000 square meters and office building 1,000 square meters . Major products : thick-wall seamless steel pipes ,alloy pipes , large diameter thick-wall pipes , elbows, flanges, tees ,reducers,pipe caps, and so on, Special design are available. For more information, please refer to our website: http://www.hbxsd.com