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How to identify the quality and authenticity of alloy steel tubes
For alloy pipe magnets, verify their quality and authenticity. If they do not attract magnets, they are considered good and genuine; if they attract magnets, they are considered counterfeit. In fact, this is an extremely one-sided, unrealistic, and wrong method of identification. There are many t...Read more -
Galvanized steel pipe details
Welded steel pipes with hot-dip or electro-galvanized layers on the surface. Galvanizing can increase the corrosion resistance of steel pipes and extend their service life. Galvanized pipes are widely used. In addition to being used as pipeline pipes for general low-pressure fluids such as water,...Read more -
Surface treatment of thick-walled straight seam steel pipes
The uniformity of the wall of thick-walled straight-seam steel pipes will directly affect the later processing of parts. The wall of thick-walled straight-seam steel pipes cannot be controlled, which means that the overall steel pipe cannot be strictly controlled. Small and medium-sized steel, wi...Read more -
Diameter expansion technology and detection methods of straight seam steel pipes
Generally speaking, the diameter of the pipe can be divided into outer diameter, inner diameter, and nominal diameter. The outer diameter of a pipe whose material is a straight seam steel pipe is represented by the letter D, followed by the outer diameter size and wall thickness. For example, a s...Read more -
Wall thickness accuracy and straightening method of straight seam steel pipes
Controlling the wall thickness of straight seam steel pipes is a difficulty in steel pipe production. At present, the methods for wall thickness accuracy in production by straight seam steel pipe manufacturers generally include: 1. Heating of tube blanks: Heating should be even and avoid rapid te...Read more -
Hot rolling and cold rolling of stainless steel
Hot rolling and cold rolling are both processes for forming steel sections or steel plates. They have a great impact on the structure and properties of steel. The rolling of steel is mainly hot rolling, while cold rolling is only used to produce small sections of steel and thin plates. 1. Hot rol...Read more -
Advantages and installation points of plastic-coated steel pipes
Plastic-coated steel pipes, also known as plastic-coated pipes, steel-plastic composite pipes, and plastic-coated composite steel pipes, are based on steel pipes. A layer of plastic anti-corrosion layer or plastic anti-corrosion layer is fused to the inner surface of the steel pipe (bottom pipe) ...Read more -
What are the heat treatment methods for spiral steel pipes
1. Thermomechanical treatment: High-temperature thermomechanical treatment can improve the yield ratio and elastic limit of spiral steel pipes. Improve the comprehensive mechanical properties, fatigue properties, and stress relaxation properties of spiral steel pipes. Reducing the ductile-brittle...Read more -
Cleaning method of plastic-coated steel pipe
(1) Spray (throwing) rust removal: Spray (throwing) rust removal uses a high-power motor to drive the spray (throwing) blades to rotate at high speed, so that steel sand, steel shots, wire segments, minerals, and other abrasives are caused by centrifugal force. Spraying (throwing) the surface of ...Read more -
Submerged arc steel pipe high-frequency welding process
1. Control of the weld gap: After rolling with multiple rollers, the strip is fed into the welded pipe unit. The strip steel is gradually rolled up to form a circular tube blank with an opening gap. The reduction amount of the squeeze roller is adjusted to control the weld gap to 1~3mm and make b...Read more -
Defects that are prone to occur in the welding area of spiral steel pipes
Defects that are prone to occur in the welding area of spiral steel pipes include pores, hot cracks, and undercuts. The pores in the spiral steel pipe weld not only affect the tightness of the pipe weld and cause pipeline leakage but also become an induction point for corrosion, seriously reducin...Read more -
Selection of submerged arc steel pipes
1. For steel steel pipelines with high peak shaving requirements, due to the uneven gas consumption of users and frequent steel pipeline pressure fluctuations, the steel pipes bear great alternating stress, and the existing defects in the pipes will expand under the alternating stress. If you cho...Read more