Annual sales of the Company Chenggang seamless steel tubes, the rule of seamless steel pipe, seamless steel tubes Anshan Iron and Steel Company, Baotou Steel seamless steel tubes, Tianjin Seamless Steel Tube spot seamless tube plant, the company annual sales Chenggang, Baoshan Iron and Steel, Baotou Steel , Several major steel mills, such as Anshan Iron and Steel Company of the cash seamless tube, standing for the material resources: 20 #, 45 #, 16 Mn, 27SiMn, 12Cr1MoV, 15CrMo, 10CrMo910, and so on. Implementation of the standards: the structure of the GB8162-1999, the fluid GB8163-1999, in the low-pressure boiler tubes GB3087-1999, high-pressure boiler tubes GB5310-1995, exclusive of fertilizer GB6479-2000, oil cracking of GB9948-88. In addition to steel pipe company for the sale of oil, coal, chemicals, fertilizers, boilers, construction machinery, shipbuilding and other industries, but also widely used in automotive components such as mechanical processing enterprises.