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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 -
Several forms of steel rolling
According to the deformation principle of rolled parts, steel rolling is generally divided into the following three forms: *.1 Longitudinal rolling: the running direction (axis) of the rolled piece is perpendicular to the axis of the roll, and the rolled piece moves in a straight line; production...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 -
Non-destructive testing of steel pipe fittings
The relevant provisions in the national standard for steel pipe fittings “GB/T13401-2017 Technical Specifications for Steel Butt Welded Pipe Fittings”: 7.3 Non-destructive testing 7.3.1 Tees, crosses, press-formed reducers, and pipe caps formed by the direct cutting of bars of all mat...Read more