Threeway Steel Co., Ltd
E-mail: sales@srtsteelpipe.com
Address: 22nd Floor, Royal Wing Tower, Long Champ International Building, No.9 Xiangfu Road, Changsha, Hunan, China, PC: 410116Phone:0086-731-8873-9521
Keywords : Update : 2015-11-22 View(s) : 1966
Steel pipe- Condition of delivery It refers to the status of plastic deformation or heat treatment when loading. Usually we called it hot rolled or cold drawing(rolling) when producing withou heat treatment, and heat treatment if opposite. Or classify as normalizing heat treatment (often),...
Keywords : Update : 2016-02-24 View(s) : 2011
First, acid pickling the steel pipe to clean oxide of iron on the surface. After that, clean the pipe by ammonium chloride or zinc chloride or ammonium chloride and zinc chloride mixed aqueous solution in tank, and then sent to the hot dip plating tank. Hot dip galvanized steel pipe has adva...
Keywords : Update : 2015-11-16 View(s) : 2221
1) Domestic oil casing adopt SY/T6194-96 standard, and random length from 8m-13m. And length under 6m is available, quantity is low than 20%. 2) No folding, hairline, delamination, crack, rolling and scarring on the surface both outside and inside. All the flaw should be cleaned. And...
Keywords : Update : 2015-11-15 View(s) : 2120
Large diameter steel pipe generally refers to OD over 500 mm diameter straight seam steel pipe, for now the biggest diameter can reach 2020 mm, single seam weld maximum diameter is 1220 mm. Standard Domestic usually adopt GB/T3091-2008、GB/T9711.1-1997、API 5L standard 。 General materi...
Keywords : Update : 2015-11-12 View(s) : 2337
1) Pipes have a longitudinal weld, internal and external weld both adopts a submerged arc welding. 2) With the whole mechanical expanding processing, stress in the internal of steel pipe is small and uniform distribution, which can effectively prevent stress corrosion cracking, and high dimensiona...