Boiler tubes threaded Classification: NPT PT G. 1.NPT is National (America) Pipe Thread abbreviation belong American standard 60 ° spinal thread for North America, the national standard inspection GB / T12716-1991 2... .PT (BSPT) is Pipe Thread abbreviation Cover is 55 ° tapered pipe thread, is a Whitworth thread family of precision steel, used in Europe and the Commonwealth countries, water and gas pipes commonly used in industry, taper: 1:16, GB inspection GB / T7306-2000 precision steel Yangzhou, China, it is called ZG. 3.G is 55 ° non-thread sealing pipe thread, is a Whitworth thread family, labeled G, on behalf of the cylindrical threaded, GB consult GB / T7307-2001. hope Shandong Liaocheng Polygram steel explanations to help you. Liaocheng in Shandong Steel Pipe Manufacturing Co. Polygram within professional manufacturer of seamless steel pipe thread, please telecommunications needs of customers or to visit the factory! ! High-pressure boiler tube is a boiler tube Taizhou precision steel tubes, seamless steel pipe category belongs. Seamless same manufacturing method, but the steel pipe used for the manufacture of steel, there are strict requirements. High-pressure boiler tubes often in high temperature and high pressure conditions used in the role of high temperature gas pipe and water vapor, oxidation and corrosion will occur. Require durable steel with high strength, high corrosion resistance to oxidation and have good organizational stability. High-pressure boiler tube is mainly used to manufacture high and ultra-high pressure boiler superheater tubes, reheater tubes, airway, the main steam pipe. Low-pressure boiler pipe GB3087-1999, high-pressure boiler pipe GB5310-1999 is used in the manufacture of various structural low pressure boiler superheated steam pipes, boiling water pipes and superheated steam locomotive boiler tubes, opium pipe, small pipe and brick arch effective quality carbon structural steel hot-rolled and cold drawn (rolled) Suzhou precision steel tubes, Huaian precision steel (certified), Yancheng precision steel supplied by Polygram Liaocheng Steel Pipe Manufacturing Co., Ltd .. Shandong Liaocheng Polygram Pipe Manufacturing Co. (www.lcbljgg.com) (www.lcbljgg.com) (www.sdlcblj.com) (www.bljggzz.com) Shandong Liaocheng, wire, pipe, plate manufacturing equipment leaders, over the years, the company implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In Polygram steel leader with the staff warmly welcome all inquiries negotiations to create Polygram steel a better future. You can also access (www.lcbljgg.com/supply_details_42532295.html), for more information about the company.