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 :Repair requirements for the shortcomings of spiral steel pipe welds Update : 2022-06-02 View(s) : 1042
The repair requirements for the shortcomings of spiral steel pipe welds are as follows: The minimum length of the repair weld is 50mm. If the defect direction on the base metal of the steel pipe is allowed, the repair welding seam should be along the circumferential direction. Repair welds s...
Keywords :What requirements should the weld repair of pressure steel pipelines meet Update : 2022-06-01 View(s) : 1104
(1) Before repairing, analyze the causes of defects and propose corresponding repairing measures. (2) When repair welding is required for repair, the qualified welding process shall be adopted, and the welding shall be carried out by a qualified welder. (3) When the number of repairs for the sam...
Keywords :Heating requirements for spiral steel pipes Update : 2022-05-31 View(s) : 1128
Before the steel is hot rolled, heating the raw material not only improves the mental plasticity, reduces the deformation force, but also facilitates rolling. In addition, during the heating process of the steel, some structural defects and stresses caused by the ingot can also be eliminated for the...
Keywords :Spiral tubes can be divided into several categories according to their use Update : 2022-05-30 View(s) : 1193
There are roughly four types of spiral steel pipes according to their uses: drainage spiral steel pipes , dredging spiral steel pipes , piling spiral steel pipes , and oil and gas spiral steel pipes . Spiral steel pipe for drainage: Spiral steel pipe material for drainage: Q235A, ...
Keywords :Causes of trachoma at the welding seam of spiral seam submerged arc welded steel pipe Update : 2022-05-27 View(s) : 1
Spiral steel pipe is made of strip steel through the coiling machine, bending in a spiral direction, and then double-sided submerged arc welding by a capacitor. In the production process of spiral steel pipe welding, many galvanized channel steel situations such as missing welding and misalign...