Company News
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How to clean straight seam steel pipe
The straight seam steel pipe structure can be a round pipe structure or a rectangular pipe structure according to the specific conditions of the components, supply conditions, production and processing conditions, and cost, or a mixture of the two types of steel pipes. When us...Read more -
The welding process of thick-walled steel pipe
Welding method: When welding thick-walled steel pipes, first clean the oil, paint, water, rust, etc. of the welding joint, and then open the groove according to the wall thickness. The gap is generally 1-1.5 times the diameter of the electrode or wire. If the groove is acciden...Read more -
What are the types of heat treatment for stainless steel welded pipes
In the production process of stainless steel welded pipe, intermediate heat treatment and finished heat treatment can be carried out. Because a bright surface without oxidation can be obtained, the traditional pickling process is eliminated. The use of this heat treatment proc...Read more -
Application Analysis of Spiral Steel Pipeline in West-East Gas Transmission Project
The West-East Gas Pipeline Project has taken corresponding measures to ensure the safety of the pipeline in terms of anti-corrosion of the spiral steel pipeline, pipeline design and construction, and dealing with complex environments. During the design and construction process...Read more -
Classification of the quality of large-diameter longitudinally welded steel pipes
The application of large-diameter longitudinally welded steel pipes has become very common in people’s lives, so do you know what grades the quality of large-diameter longitudinally welded steel pipes can be divided into? The following will introduce the specific content...Read more -
The purpose of preheating the pipe before welding the spiral steel pipe
The purpose of preheating the spiral steel pipe before welding is as follows: (1) Preheating can slow down the cooling rate after welding so that hydrogen diffuses in the weld metal and escapes to avoid cracking caused by hydrogen. It can also reduce the degree of hardening of...Read more -
The high-frequency welding process of submerged arc steel pipe
Introduction of the high-frequency welding process of submerged arc steel pipe: 1. Control of weld gap: After rolling by multiple rollers, the strip is sent to the welded pipe unit. The strip steel is gradually rolled up to form a circular tube blank with an opening gap, and t...Read more -
What is the difference between 2205 duplex stainless steel pipe and 304 stainless steel pipe
1. Compared with 304 stainless steel pipe, the advantages of duplex stainless steel pipe are as follows: (1) The yield strength is more than double that of ordinary austenitic stainless steel, and it has sufficient plastic toughness required for forming. The wall thickness of ...Read more -
What is the difference between spiral steel pipe and steel coil pipe
Both spiral steel pipes and steel coiled pipes belong to welded steel pipes, and the production processes of the two are very different. Spiral steel pipe is a spiral seam steel pipe made of strip steel coil as raw material, often warmly extruded, and welded by the automatic d...Read more