Straight seam steel pipe for straight seam steel pipe

Straight seam steel pipe production of straight seam steel pipe use straight seam steel pipe specifications Shandong Liaocheng Kunlian Steel Pipe Co., Ltd. specializing in the production of straight seam steel pipe large diameter straight seam steel pipe thick-walled straight seam steel pipe. Straight seam steel pipe is a longitudinally parallel steel pipe. Usually divided into metric welded steel pipe, welded thin-walled pipe, transformer cooling oil pipe and so on. The straight seam welded pipe has a simple production process, high production efficiency, low cost, and rapid development. The strength of the spiral welded pipe is generally higher than that of the straight seam welded pipe. A narrower blank can be used to produce a larger diameter pipe, and a blank having a different diameter can also be produced using a blank of the same width. However, compared with the straight seam pipe of the same length, the length of the weld seam increases by 30 to 100%, and the production speed is low.
Straight seam steel pipe has the characteristics of relatively simple technology, rapid and continuous production, and has extensive use in civil construction, petrochemical, light industry and other departments. It can be used to transport low-pressure fluid or make various engineering components and light industrial products. The specifications of straight seam steel pipe can reach more than 1000 kinds. The specifications include 351-1050mm*8-30mm. The material includes Q235B series, Q345B series, #20, etc. It is used for structural engineering, fluids, and pipe processing.
Available standards include: GB/T3091-2001, GB/T 3092-1993, GB/T 9711.1-1997, GB/T9711.2, GB/T9711.3t and other domestic and international standards and technical agreements between supply and demand.
Straight seam steel pipe expansion is a pressure processing technology that uses hydraulic or mechanical force from the inner wall of the steel pipe to expand and form the steel pipe radially outward. Mechanical methods are simpler and more efficient than hydraulic methods, and the most advanced large-diameter straight seam steel pipe pipelines in the world have been used in the expansion process.
2.1 Straight seam steel pipes with an outer diameter of not less than 36 mm and special-shaped straight seam steel pipes with a perimeter of not less than 150 mm in circumference shall be stamped, stamped, rolled, stamped or pasted on the end of each straight seam steel pipe. The imprint should be clear and obvious and not easy to fall off. Imprint should include steel grades, product specifications, production standards, and supplier stamps or registered trademarks. The straight seam steel pipe of the alloy steel shall have a furnace number and a lot number printed on the steel grade. Geological and petroleum straight seam steel pipe joints shall have grade or steel grade markings. Threaded straight seam steel pipe with left-hand thread shall be printed with "left" after the standard number. Low-pressure fluid transport welded straight seam steel pipe and galvanized welded straight seam steel pipe, wire bushing, general-purpose welded straight seam steel pipe, special-shaped section welded straight seam steel pipe, complex section of seamless straight seam steel pipe, not every straight Printed on the seam pipe.
2.2 Longitudinal seam steel pipes with an outer diameter of less than 36 mm and profiled straight seam steel pipes with a perimeter of less than 150 mm may not be printed.
2.3 Each bundle of straight-sealed steel tubes in bundles shall be affixed with not less than 2 placards (each of which may be affixed with an imprint on the straight seam steel tube). The signage shall indicate: the supplier's mark or registered trademark, the grade of steel (other than the product standard does not stipulate delivery by furnace number), batch number, contract number, product specification, product standard number, weight or number, manufacturing date and The mark of the supplier's technical supervision department.
2.4 Straight seam steel pipe and pipe joints packaged in containers shall be attached with a sign in the container. On the outer surface of the container, a sign should also be attached. The content on the sign should meet the requirements of 3.3.
Straight seam steel pipe 73*2.5-4.0 114*2.25-4.75 159*8.6-10.0 245*4.75 426*8.25-10.0
Straight seam steel pipe 73*4.1-4.75 114*5-6.25 165*2.75-3.0 245*5.25-8.0 426*10.25-25.0
Straight seam steel pipe 73*4.8-5.25 114*5.5-10 165*3.25-5.0 245*8.25-10.0 457*5.25-8.0
Straight seam steel pipe 73*5.3-7.0 121*2.75-3.0 165*5.25-7.0 245*10.25-12.0 457*8.25-10.0
Straight seam steel pipe 76*0.9-2.25 121*3.25-4.75 168*2.75-3.25 273.1*5 457*10.25-25.0
Straight seam steel pipe 76*2.5-4.0 121*4.75-5.75 168*3.5-6.0 273.1*5.25-8.0 -
Straight seam steel pipe 76.1*4.1-4.75 121*6.0-7.0 168*6.25-8.0 273.1*8.25-10.0
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