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  • [Industry News] The difference between seamless steel pipe and welded pipe

    In the appearance of steel pipes, the difference between seamless steel pipes and welded steel pipes is that the inner wall of the welded pipe has welding ribs, while the seamless steel pipe does not. The pressure of seamless pipes is higher. Welded pipes are generally around 10 MPa. Now welded pipe

  • [Industry News] Derusting method of spiral pipe

    Spiral pipe is also called spiral steel pipe or spiral welded pipe. It is made by rolling low-carbon structural steel or low-alloy structural steel strip according to a certain spiral angle (called forming angle) into a tube blank, and then welding the pipe seam together. It can produce large-diamet

  • [Industry News] Comparison of spiral steel pipe, straight seam steel pipe and seamless steel pipe

    The production process of longitudinally welded pipe is relatively simple. The main production processes are high-frequency welded longitudinally welded pipe and submerged arc welded longitudinally welded pipe. The longitudinally welded pipe has high production efficiency, low cost, and rapid develo

  • [Industry News] Wear resistance of seamless pipe

    Thick-walled seamless pipes have been widely used in pipelines in recent years. In pipeline applications, due to the transportation of a large number of relatively high-viscosity liquids, its wear resistance is reflected. What are the characteristics of the wear resistance of the seam pipe?1. Wear r

  • [Industry News] How to distinguish between straight seam steel pipe and seamless steel pipe correctly

    How to distinguish between straight seam steel pipe and seamless steel pipe correctlyNow all walks of life are really very competitive. No matter what industry has competition, the straight seam steel pipe industry is no exception. In order to increase profits, many manufacturers will stop using str

  • [Industry News] Seamless steel tube product details

    10# seamless steel pipe mechanical properties:Tensile strength σb (MPa): ≥410 (42) Yield strength σs (MPa): ≥245 (25) elongation δ5 (%): ≥25 shrinkage rate ψ (%): ≥5, hardness: unheated ,≤156HB, sample size: sample size 25mm  10# Seamless steel pipe instructions   Used in various fields such as auto

  • [Industry News] In June, export steel hit a new low in 8 years, and import steel hit a new high in 10 years.

    Futures Daily News (Reporter Tan Yamin) According to data from the General Administration of Customs on July 14, 2020, China exported 3.701 million tons of steel products in June 2020, a decrease of 699,000 tons from the previous month, a year-on-year decrease of 30.3%; The export of steel products

  • [Industry News] Seamless steel tube wall thickness and pressure comparison table

    1. In the table, CS stands for carbon steel seamless pipe, applicable materials GB8163 "Seamless steel pipe for fluid transportation", GB3087 "Seamless steel pipe for low and medium pressure boilers", GB6479 "High-pressure seamless steel pipe for fertilizer equipment" GB9948 "Petroleum cracking" Use

  • [Industry News] What is the cold expansion technology of straight seam steel pipes?

    Straight seam steel pipe expansion is a pressure processing technology that uses hydraulic or mechanical means to apply force from the inner wall of the steel pipe to expand and expand the steel pipe radially outward. The mechanical method is simpler and has a higher speed than the hydraulic met

  • [Industry News] What are the acceptance criteria for steel pipes?

    The inspection and acceptance of straight seam steel pipes shall be carried out by the technical supervision department of the supplier. The supplier needs to ensure that the straight seam steel pipe meets the requirements of the corresponding product standards at the time of delivery. The purch

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