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Testing method of coated steel pipe
A. Visual inspection Visually inspects the appearance quality of the coated steel pipe. B. Thickness measurement Take two cross-sections of different lengths from the two ends of the coated steel pipe, and measure the coating thickness at any four points on the circumference at right angles with ...Read more -
Longitudinal welded pipe anti-rust maintenance and inspection methods
The longitudinal welded pipe has a simple production process, high production efficiency, low cost, and rapid development. The strength of spiral welded pipes is generally higher than that of straight seam welded pipes. A narrower blank can be used to produce welded pipes with larger pipe diamete...Read more -
What is the difference between cold-drawn steel pipe and hot-rolled steel pipe
(1) The difference between hot working and cold working: hot rolling is hot working, and cold drawing is cold working. The main difference: is that hot rolling is rolling above the recrystallization temperature, cold rolling is rolling below the recrystallization temperature, and cold rolling is ...Read more -
Anti-corrosion practices for buried steel pipes
Pipe rust removal → Apply primer → Top coat → Second coat of top coat → Wrap glass silk cloth → Top coat → Top coat; Inner wall construction process: pipe rust removal → primer application → top coat → second top coat → third top coat 1. Pipe rust removal Before applying primer, the surface of th...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 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 -
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 do fire steel fittings include
Fire steel pipe fittings refer to the metal joints on fire pipe belts. As a product made of special materials, the connection operation is very simple and does not require special professional skills. Ordinary workers can operate it with simple training. On the other hand, fire steel pipe fitting...Read more -
A brief introduction to boiler steel pipes
Boiler steel pipes refer to steel materials that are open at both ends and have hollow sections with a large length relative to the surrounding area. According to the production method, they can be divided into seamless steel pipes and welded steel pipes. The specifications of the steel pipes are...Read more