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  • Knowledge of seamless steel pipe inspection

    Knowledge of seamless steel pipe inspection

    1、chemical composition test 1.according to the chemical composition and mechanical properties of domestic seamless pipe, such as 10, 15, 20, 25, 30, 35, 40, 45 and 50 steel chemical composition should comply with the provisions of GB/T699-88.Imported seamless pipes shall be inspected according ...
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  • Seamless steel tube knowledge

    Seamless steel tube knowledge

    The outer diameter of hot-rolled seamless pipe is generally greater than 32mm, and the wall thickness is 2.5-200mm. The outer diameter of cold-rolled seamless steel pipe can reach 6mm, and the wall thickness can reach 0.25mm. The outer diameter of thin-walled pipe can reach 5mm and the wall thick...
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  • Steel prices before and after the Spring Festival: before the festival is not bearish, not bullish after the festival

    Steel prices before and after the Spring Festival: before the festival is not bearish, not bullish after the festival

    2021 has passed and a New Year has begun.Looking back on the year, the steel market has had its ups and downs.In the first half of the year, the global economic recovery, the rapid growth of domestic real estate and fixed asset investment, driving the demand for steel, steel prices into the risin...
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  • Five kinds of heat treatment process for seamless steel tube and precision steel tube

    Five kinds of heat treatment process for seamless steel tube and precision steel tube

    The heat treatment process of steel pipe mainly includes the following 5 categories: 1, quenching + high temperature tempering (also known as quenching and tempering) The steel pipe is heated to the quenching temperature, so that the internal structure of the steel pipe is transformed into auste...
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  • Introduction to alloy steel tube

    Introduction to alloy steel tube

    Alloy steel pipe is mainly used in power plant, nuclear power, high pressure boiler, high temperature superheater and reheater and other high pressure and high temperature pipeline and equipment, it is made of high quality carbon steel, alloy structure steel and stainless heat-resistant steel mat...
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  • Structure with seamless pipe

    Structure with seamless pipe

    1 .Brief introduction of structural pipe Seamless pipe for structure (GB/T8162-2008) is used for the general structure and mechanical structure of the seamless pipe.Seamless steel tube is divided into a variety of different uses. Stainless steel seamless pipe for structure (GB/T14975-2002) is a ...
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  • Oil steel pipe

    Oil steel pipe

    Petroleum steel pipe is a kind of long steel with hollow section and no joint around, while petroleum cracking pipe is a kind of economic section steel.Role: widely used in the manufacture of structural and mechanical parts, such as oil drill pipe, automobile drive shaft, bicycle frame and steel ...
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  • Boiler tube

    Boiler tube

    Implement GB 3087, GB/T 5310, DIN 17175, EN 10216, ASME SA-106/SA-106M, ASME SA-192/SA-192M, ASME SA-209/SA-209M, ASMESa-210 /SA-210M, ASME SA-213/SA-213M, ASME SA-335/SA-335M, JIS G 3456, JIS G 3461, JIS G 3462 and other related standards. Standard name Standard Common grade of steel Seamle...
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  • Steel Pipe Knowledge (Part 4)

    Steel Pipe Knowledge (Part 4)

    Standards referred to as” There are many standards for Steel products in the United States, mainly including the following: ANSI American national standard AISI American Institute of Iron and Steel standards ASTM Standard of American Society for Materials and Testing ASME Standard AMS Aeros...
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  • Knowledge of Steel Pipe (Part Three)

    Knowledge of Steel Pipe (Part Three)

    1.1 Standard classification used for steel pipes:      1.1.1 By region   (1) Domestic standards: national standards, industry standards, corporate standards   (2) International standards:         United States: ASTM, ASME         United Kingdom: BS         Germany: DIN         Japan: JIS      1.1...
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  • Part 2 of applicable standards for seamless pipes

    Part 2 of applicable standards for seamless pipes

    GB13296-2013 (Seamless steel pipes for boilers and heat exchangers). Mainly used in boilers, superheaters, heat exchangers, condensers, catalytic tubes, etc. of chemical enterprises. Used high-temperature, high-pressure, corrosion-resistant steel pipe. Its representative materials are 0Cr18Ni9, 1...
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  • Applicable Standards for Seamless Pipes (Part One)

    Applicable Standards for Seamless Pipes (Part One)

    GB/T8162-2008 (Seamless steel pipe for structure). Mainly used for general structure and mechanical structure. Its representative materials (brands): carbon steel #20,# 45 steel; alloy steel Q345B, 20Cr, 40Cr, 20CrMo, 30-35CrMo, 42CrMo, etc. To ensure the strength and flattening test. GB/T8163-20...
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  • Steel pipe knowledge part one

    Steel pipe knowledge part one

    Classified by production methods (1) Seamless steel pipes-hot rolled pipes, cold rolled pipes, cold drawn pipes, extruded pipes, pipe jacking (2) Welded steel pipe Classified by pipe material-carbon steel pipe and alloy pipe Carbon steel pipes can be further divided into: ordinary carbon steel pi...
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  • The difference between ERW tube and LSAW tube

    The difference between ERW tube and LSAW tube

    ERW pipe and LSAW pipe are both straight seam welded pipes, which are mainly used for fluid transportation, especially long-distance pipelines for oil and gas. The main difference between the two is the welding process. Different processes make the pipe possess different characteristics and are s...
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  • The latest market report

    The latest market report

    This week steel prices rose as a whole, as the country in September to invest in the market capital brought by the chain reaction gradually emerged, downstream demand has increased, entrepreneurs macroeconomic index also showed that many enterprises said the economy in the fourth quarter good ope...
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  • Steel Market Information

    Steel Market Information

    Last week (September 22-September 24) the domestic steel market inventory continued to decline. Affected by the non-compliance of energy consumption in some provinces and cities, the operating rate of blast furnaces and electric furnaces dropped significantly, and the domestic steel market price ...
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