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GB/T 9711-2017 Petroleum and natural gas industries -- Steel pipe for pipeline transportation systems ICS 75.200 E98 National Standards of People's Republic of China Replace GB/T 9711-2011 Steel pipe for oil and gas industry pipeline transportation system (ISO 3183.2012, MOD) Released on.2017-05-12 2017-12-01 implementation GB/T Standard Pipe,Seamless Steel Pipe,ERW Steel Pipe Yanshan is China GB/T standard pipe manufacturer. We offer various types of products such as GB/T standard pipe, slip on weld flange, galvanized steel pipe. Our products are high quality and competitively priced. ERW steel pipe is a pipe formed by electric resistance welding. It has a welded joint in its cross section. ERW steel pipe is for water and gas conveyance, structural and engineering Steel Manufacturers & Suppliers, China steel Manufacturers steel manufacturer/supplier, China steel manufacturer & factory list, find qualified Chinese steel manufacturers, suppliers, factories, exporters & wholesalers quickly on Made-in-China. Hot Sale GB/T700-2006 Q235B Thick Steel Plain Factory Supplier. ERW Steel Pipe , Welded Steel Pipe , Carbon Steel Pipe , Steel
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