
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 : 2015-11-26 View(s) : 3341
1. Appearance; Welded steel pipe have a welding line on the inner wall but seamless have no. 2. Pressure; Pressure of seamless pipe is higher. Generally welded pipe is around 10 MPa, and have welded pipe seamless process. 3.Welded pipe is completed by cold rolling system, high frequency we...

Keywords : Update : 2015-11-23 View(s) : 3041
However,in front of 2015, it is a big challenge for us. For now, our challenge now is double; On the one hand, economic rights speed slow. On the other hand, from the marketing, research and development, production, logistics, and the impact to the enterprise management. Five tips ...

Keywords : Update : 2015-11-22 View(s) : 2963
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) : 2962
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) : 3273
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...