We usually refer to thick straight seam steel pipe refers to the ratio of the diameter and wall thickness of less than 20 steel pipe, straight seam steel pipe thick oil is mainly used as geological drilling pipe, used in petrochemical cracking tubes, boiler tubes, bearing tube as well as automobiles, tractors, precision aviation structures tubes. thick straight seam steel pipes and the biggest difference is that the thin-walled straight seam steel pipe wall thickness is generally believed that the wall thickness / diameter equal to 0.02 is thick and straight seam steel pipe watershed straight seam steel thin-walled, wall thickness / diameter of less than 0.02 was thin-walled steel pipe, straight seam larger than the thick-walled steel pipe, on purpose, the thin-walled steel pipes used for the pipeline. The thick-walled hollow straight seam steel pipe used in multiple parts of the blanks and the use of pressure pipes more important source of information:.. Www.czfggs.com Steel Tube Co., Ltd. Cangzhou million