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The difference between reinforced 3PE anti-corrosion steel pipes and ordinary 3PE anti-corrosion steel pipes
Currently, there are two standards for 3PE anti-corrosion steel pipes, namely GB/T 23257-2009 and GB/T 23257-2017. GB/T 23257-2017 is a new standard and was implemented in December 2017. The two standards differ mainly in the following aspects: 3PE anti-corrosion steel pipe 1. The design temperat...Read more -
Detailed explanation of spiral steel pipe production process and process characteristics
Spiral steel pipe production process (1) Raw materials include steel strip coil, welding wire, and flux. They must undergo strict physical and chemical inspections before being put into use. (2) The head and tail of the steel strip are butt-jointed using single-wire or double-wire submerged arc w...Read more -
Defects of anti-corrosion of steel pipes coated with epoxy coal pitch paint
1) During on-site construction, the curing of epoxy resin is affected by temperature, the curing is slow, and the construction period is long. 2) Since a large amount of solvent is added during construction, it is easy for some construction units to have the opportunity to cut corners (add more s...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 -
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 -
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 -
Eight characteristics of 3PE anti corrosive steel pipe
1. The polyethylene material used in 3pe steel pipes makes the pipes have a long service life, large molecular weight, good stability, and aging resistance. Under normal working temperature and pressure, the service life can be guaranteed for more than 50 years. 2. The corrosion-resistant polyeth...Read more -
The purpose of preheating the pipe before welding the spiral steel pipe
The purpose of preheating before welding is as follows: (1) Preheating can slow down the cooling rate after welding, allowing hydrogen to diffuse and escape in the weld metal, thus avoiding cracking caused by hydrogen. It can also reduce the degree of hardening of welds and heat-affected zones to...Read more -
Anti-corrosion countermeasures of oil casing
1. To make sure that the water quality meets the standards, and strictly monitor and manage the water quality. Implement cleaning and separate injection, strengthen the cleaning of main water pipelines, ensure that the water quality in the station and the bottom of the well meets the standard, an...Read more
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