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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: 410116

Phone:0086-731-8873-9521  

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Repair requirements for the shortcomings of spiral steel pipe welds

Repair requirements for the shortcomings of spiral steel pipe welds

Keywords :Repair requirements for the shortcomings of spiral steel pipe welds        Update : 2022-06-02        View(s) : 761

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...

Heating requirements for spiral steel pipes

Heating requirements for spiral steel pipes

Keywords :Heating requirements for spiral steel pipes        Update : 2022-05-31        View(s) : 818

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...

Causes of trachoma at the welding seam of spiral seam submerged arc welded steel pipe

Causes of trachoma at the welding seam of spiral seam submerged arc welded steel pipe

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...

Causes of trachoma at the welding seam of spiral seam submerged arc welded steel pipe

Causes of trachoma at the welding seam of spiral seam submerged arc welded steel pipe

Keywords :Causes of trachoma at the welding seam of spiral seam submerged arc welded steel pipe        Update : 2022-05-25        View(s) : 725

Spiral steel pipe is made of strip steel passing through a coiling machine, bending in a spiral direction, and then double-sided submerged arc welding by capacitors. In the production process of spiral steel pipe welding, many galvanized channel steel situations such as missing welding and mis...

What is the stress state of the spiral steel pipe during the extrusion process

What is the stress state of the spiral steel pipe during the extrusion process

Keywords :What is the stress state of the spiral steel pipe during the extrusion process        Update : 2022-05-23        View(s) : 736

(1) During the extrusion process, the temperature of the inner lining of the spiral steel pipe increases continuously with the extrusion process. At the end of the extrusion, the temperature of the inner wall of the inner lining near the extrusion die is higher, reaching 631 °C. The temperature ...

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