Cangzhou DoubleDragon Steel Pipe Co,Ltd.
May 15, 2024 No Comments
Introduce Q235B spiral seam welded pipe is a commonly used transportation pipeline. Q23B is a material of carbon steel pipe. Among them, Q235B consists of Q + number + quality…
Cangzhou DoubleDragon Steel Pipe Co,Ltd.
May 15, 2024 No Comments
According to the quality inspection results of spiral welded pipe, spiral welded pipe is usually divided into three categories: qualified product, repaired product and scrap product. 1.Qualified products refer to…
Cangzhou DoubleDragon Steel Pipe Co,Ltd.
May 15, 2024 No Comments
Spiral welded steel pipe quality inspection Spiral welded steel pipe should undergo mechanical performance tests, flattening tests and expansion tests before leaving the factory, and must meet the requirements of…
Cangzhou DoubleDragon Steel Pipe Co,Ltd.
May 15, 2024 No Comments
The principle requirement for stacking spiral steel pipes The principle requirement for stacking spiral steel pipes is to stack them according to types and specifications on the premise of ensuring…
Cangzhou DoubleDragon Steel Pipe Co,Ltd.
May 15, 2024 No Comments
The main process features of spiral steel pipe: a. During the forming process, the steel plate deforms evenly, has small residual stress, and does not produce scratches on the surface.…
Cangzhou DoubleDragon Steel Pipe Co,Ltd.
May 15, 2024 No Comments
Q235 is a material of ordinary carbon structural steel. Q represents the yield limit of this material. The following 235 refers to the yield value of this material, which is…
Cangzhou DoubleDragon Steel Pipe Co,Ltd.
May 15, 2024 No Comments
Spiral welded steel pipe wall thickness deviation range: Currently, spiral steel welded pipe manufacturers have two settlement methods when selling spiral steel pipes: one is to settle based on the…
Cangzhou DoubleDragon Steel Pipe Co,Ltd.
May 15, 2024 No Comments
The following tests are performed on spiral steel pipes before leaving the factory: 1: Appearance inspection: Appearance inspection is a simple and widely used inspection method. It is an important…
