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Advantages of plastic-coated steel pipe as cable protection pipe
Plastic-coated pipes are coated pipes that not only have good corrosion resistance but also have good electrical insulation and low water absorption, extending the service life of the pipes and achieving long-term use. Advantages of plastic-coated steel pipes as cable protection pipes: 1. Suitabl...Read more -
What are the acceptance criteria for steel pipes
① Steel pipe wall thickness inspection: micrometer, ultrasonic thickness gauge, no less than 8 points at both ends and recorded. ② Steel pipe outer diameter and ovality inspection: snap gauge, vernier caliper, ring gauge, measuring point, minimum point. ③Steel pipe length inspection: steel tape m...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 -
How to treat the surface of high frequency welded steel pipe
1.Cleaning. Solvents and emulsions are used to clean the surface of the steel to remove oil, grease, dust, lubricants, and similar organic matter, but it cannot remove rust, oxide scale, solder, etc. on the surface of the steel, so it is only used as an auxiliary means in anti-corrosion productio...Read more -
Production process of large-diameter straight seam steel pipe
A large-diameter longitudinally welded pipe is a general term. It is produced by a steel strip. The pipes that are welded by high-frequency welding equipment are called longitudinally welded pipes. (The name is given because the welds of the steel pipe are in a straight line). Among them, accordi...Read more -
Seamless steel pipe quality inspection
1. Chemical composition analysis Both instrumental analyses and chemical analyses can be used. The samples used for chemical analysis are smelt samples, ingot drill chips samples, and pipe samples. The smelt sample generally adopts the instrumental analysis method, and the finished pipe sample ad...Read more -
There is no hidden danger in the mixed-use of galvanized pipe and galvanized seamless steel pipe
Galvanized pipe, also known as galvanized steel pipe, has the advantages of thick hot-dip galvanized layer, uniform coating, strong adhesion, and long service life. The hot-dip galvanized seamless steel pipe has a hollow section and is used as a pipeline for transporting fluids, such as pipelines...Read more -
Common defects in the welding area of spiral steel pipe
1. Bubbles Bubbles mostly occur to the center of the weld bead. Hydrogen is still hidden in the weld metal in the form of bubbles. The main reason is that the welding wire and flux have moisture on the surface. They are used directly without drying, and the current is relatively high during the w...Read more -
What are the advantages of plastic-coated composite steel pipe
Plastic-coated composite steel pipe is based on a welded steel pipe and seamless steel pipe, and the inner and outer walls are coated with epoxy resin or polyethylene powder. It is an anti-corrosive, corrosion-resistant, non-toxic, and non-radiation green environmental protection pipe, which is u...Read more -
Basic requirements for the appearance of welds of straight seam steel pipes
1. The surface of the welding joint: A. Cracks, lack of fusion, pores, slag inclusion, and splashes are not allowed. B. The weld surface of pipes whose design temperature is lower than -29 degrees, stainless steel and alloy steel pipes with a greater tendency to hardening shall not have undercut....Read more -
Control Measures for Submerged Arc Steel Pipe Welding
Submerged arc steel pipe has become the steel pipe of large-scale oil and gas transportation projects at home and abroad due to its large wall thickness, good material quality and stable processing technology. In large-diameter submerged arc steel pipe welded joints, the weld seam and heat-affect...Read more -
Analysis of the difference between seam stainless steel pipe and seamless stainless steel pipe
4. Pipe strength The strength of the pipeline depends on the alloy composition, so the seamless stainless steel pipe and the seamed stainless steel pipe containing the same alloy and the same heat treatment are essentially the same in strength. After the tensile test and three-dimensional vibrati...Read more
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