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How to treat the surface of high frequency welded steel pipe
The anti-corrosion layer specification requires the surface of thick-walled steel pipes, and continuously improves the surface treatment methods of thick-walled steel pipes: 1.Cleaning. Solvents and emulsions are used to clean the surface of the steel to remove oil, grease, dust, lubricants, and ...Read more -
Submerged arc steel pipe forming method
Submerged arc steel pipe forming methods include continuous twist forming (HME), roll forming method (CFE), Uing Oing Expanding forming method (UOE), roll bending forming method (RBE), Jing Cing Oing Expanding forming method (JCOE), etc. However, three forming methods, UOE, RBE, and JCOE, are wid...Read more -
Main points of processing technology of large diameter straight seam steel pipes
① The large-diameter straight seam steel pipe, tooth shape, and pitch of the wire head of the processed steel reinforcement thread are consistent with the tooth shape and pitch of the connecting sleeve, and the matching gauge has passed the inspection. ②When processing reinforced threads, water-s...Read more -
Main technological characteristics of spiral steel pipe
a. During the forming process, the steel plate deforms evenly, the residual stress is small, and the surface does not produce scratches. The processed spiral steel pipe has greater flexibility in the size and specification range of diameter and wall thickness, especially in the production of high...Read more -
Welding technology and production method of large-diameter straight seam steel pipes
1. Control of the weld gap The strip steel is sent to the welded steel pipe unit, after rolling by multiple rollers, the strip steel is gradually rolled up to form a round tube blank with an open gap, and the reduction of the squeeze roller is adjusted to control the weld gap to 1~3mm, And make t...Read more -
How to do electric welding of spiral steel pipe
When using spiral steel pipes, how to do the actual operation of electric welding? Next, let’s talk to friends. Before using spiral steel pipes, it is necessary to use deoxidizers to do deoxidation work. During the operation, the number and size of debris will be reduced. It should be understood ...Read more -
What should be done at the end of cooling of large-diameter steel pipes
(1) When the cooling is over, that is, when the temperature of the surface layer and the core part are all the same, the elastic deformation of the surface layer and the core part also disappears and return to the original state. Although instantaneous thermal stress is generated during the cooli...Read more -
What requirements should be met for weld repair of pressure steel pipes
(1) Before repair, the causes of steel pipe defects should be analyzed and corresponding repair measures should be proposed. (2) When reworked steel pipes require repair welding, qualified welding processes should be used and welded by qualified welders. (3) When the number of repairs for the sam...Read more -
What is a stainless steel profile
Stainless steel profiles are stainless steel materials with different cross-sectional shapes obtained by hot melting and extruding stainless steel rods. The production process of stainless steel profiles mainly includes three processes: casting, extrusion, and coloring. Among them, coloring mainl...Read more -
Embroidery removal technology for submerged arc steel pipes
Introduction to the embroidery removal technology of submerged arc steel pipes: During the anti-corrosion construction process of oil and gas pipelines, the surface treatment of large-diameter submerged arc steel pipes is a key factor that determines the anti-corrosion service life of the pipelin...Read more -
What is the difference between high-pressure boiler steel tubes and low- and medium-pressure boiler steel tubes
The differences between high-pressure boiler steel tubes and low- and medium-pressure boiler steel tubes are as follows: 1. Different implementation standards High-pressure boiler steel tube implementation standard: GB/T5310-2018 Low and medium pressure boiler steel tube implementation standards:...Read more -
What is the main function of valves
Valves are pipeline accessories used to open and close pipelines, control flow direction, and adjust and control the parameters (temperature, pressure, and flow) of the conveyed medium. According to their functions, they can be divided into shut-off valves, check valves, regulating valves, etc. V...Read more