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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 -
How to control the quality of high frequency welding steel pipe
The main points of high-frequency welding quality control In the process of high-frequency welding of steel pipes, the control of the welding process and process parameters, the placement of the induction coil and the impedance device, etc. have a great influence on the welding quality of the ste...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 properties should the anti-corrosion layer of steel pipelines have
The anti-corrosion layer of steel pipelines should have the following properties: (1) Effective electrical insulation. (2) It has good moisture-proof and waterproof properties. (3) It has muscular mechanical strength. (4) The anti-corrosion layer has good adhesion to the steel surface. (5) The ma...Read more -
What measures can be taken to reduce the resistance of steel pipe fittings
The resistance of the fluid is responsible for energy loss (i.e. drag loss). One is the resistance loss along the way caused by the viscosity and inertia of the fluid; the other is caused by the sudden expansion or contraction of the pipeline-interface, etc. The blocking and disturbance effects o...Read more -
What are the common categories of stainless steel pipes on the market
1. Production method: Stainless steel welded pipes are divided into two categories: seamless pipes and welded pipes according to the production method. Seamless steel pipes can be divided into hot-rolled pipes, cold-rolled pipes, cold-drawn pipes, and extruded pipes. Cold-drawn, cold-rolled It is...Read more -
Thin-walled stainless steel pipe construction and installation
1) Thin-walled stainless steel pipes and fittings should not be in direct contact with cement, cement mortar, and concrete. When the pipeline is concealed, anti-corrosion tape should be wrapped around the outer wall of the pipe or plastic-coated thin-walled stainless steel pipe should be used. 2)...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