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Seamless Steel Pipe Different Standard And Grade - China

price: contact company for price

SMLS(Seamless Steel Pipe)


Applicable to the general structure, mechanical structure with seamless steel tubes and transport liquid, gas, oil etc.

Quality Standard:

GB/T 8163: Seamless steel tubes for liquid service

GB 3087: Seamless Steel Tubes for Low and Medium Pressure

GB 5310: Seamless steel tubes and pipes for high pressure boiler

ASTM A106: Standard Specification for Seamless Carbon Steel Pipe for High-Temperature Service

ASTM A179: Standard Specification for Seamless Cold-Drawn Low-Carbon Steel Heat-Exchanger and Condenser Tubes

ASTM A192: Standard Specification for Seamless Carbon Steel Boiler Tubes for High-Pressure Service

ASTM A333: Standard Specification for Seamless and Welded Steel Pipe for Low-Temperature Service

ASTM A335: Standard Specification for Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service

JIS G3452: Carbon Steel Pipes for Ordinary Piping

JIS G3454: Carbon Steel Pipes for Pressure Service




API 5L: Line Pipe

Steel Grade:

GB/T 8163: 10#, 20#, 35#, 45#, 16MN(Q345B)

GB 3087: 10#, 20#, 35#, 45#, 16MN(Q345B)

GB 5310: 20GG, 12CrMoG

ASTM A106: Gr A, Gr B, Gr C

ASTM A333: Gr 1, Gr 3, Gr 6, Gr 8

ASTM A335: P1, P2, P5, P9, P11, P12, P22

JIS G3452: SGP

JIS G3455: STS 370, STS 410, STS 480

BS3059: HFS320, CFS320

DIN 1629: St 37.0, St 44.0, St 52.0

DIN 17175: St35.8, St45.8, 17Mn4, 19Mn5, 15Mo3, 13CrMo910, 10CrMo910, 14MoV63, X20CrMoV121

API 5L: A B X42, X46, X52, X60, X65, X70, X80


Outer Diameter: Cold drawn: 0.875' - 18'

Wall Thickness: Cold drawn: 0.035' - 0.875'

Length: Random Length, Fixed Length, SRL, DRL

Heat treatment:

Annealed, Normalized


Zinc coating, black phosphated, oiled


Plastic plugs in both ends, Hexagonal bundles of max. 2, 000kg with several steel strips, Two tags on each bundle, Wrapped in waterproof paper, PVC sleeve, and sackcloth with several steel strips


Chemical Component Analysis, Mechanical Properties (Ultimate tensile strength, Yield strength, Elongation), Technical Properties (Flattening Test, Flaring Test, Bending Test, Hardness Test, Blow Test, Impact Test etc), Exterior Size Inspection, Nondestructive Test (Ultrasonic flaw detector, Eddy current flaw detector), Hydrostatic Test.

Company Contact:

  • Phone: 008673188678534

  • Address: No.9 Xiangfu Road, Changsha, China

  • Email: Email

Published date: November 6, 2013 -

  • Business Description: Threeway Steel Co., Ltd. is a leading steel company engaged in meeting the growing demands from all over the world with a variety of competitive steel products for the construction and allied industries. The steel products include Galvanized steel pipe, GI tube, square tube, rectangular tube, scaffolding tube, scaffolding clamps, coupler, and other related steel products.

    As a key member and external gateway of our group, the main role of Threeway Steel is to export the steel products made by associated companies under our group and provide professional service for the foreign customers. The export steel products meet the steel requirements of international systems.

    We exported to South America,Mid East etc. and mainly do steel pipe covering seamless steel pipe, welded steel pipe(SSAW,LSAW,ERW), galvanized steel pipe ,stainless pipe etc. Details are as follows:

    1. Seamless Steel Pipe:
    Outside dimension: 10mm 610mm; Wall thickness: 2mm 50mm;
    The ordinary fixed length: 5.8mtr 11.8mtr;

    2. ERW Steel Pipe:
    Outside dimension: 21.3mm 660mm; Wall thickness: 2mm 25.4mm;
    The ordinary fixed length: 6mtr 12mtr;

    3. LSAW Steel Pipe:
    Outside dimension: 325mm 1800mm; Wall thickness: 8mm 50mm;
    The ordinary fixed length: 6mtr 12mtr;

    4. SSAW Steel Pipe:
    Outside dimension: 219mm 4064mm; Wall thickness: 6mm 25.4mm;
    The ordinary fixed length: 6mtr 12mtr.

    Our products are qualified with multiple quality standard such as GB/T 3091/9711, SY/T 5037, ASTM 53, API 5l, BS 534/3601, DIN 1626/2440, EN 10240, JIS G3444, IS 1978, etc., and most of the material is accordance with the customers all over the world.

    One is that we are equipped with the complete machines, such as the heat furnace, piercing mill, hot rolling mill, tube cutter, cooling bed, ultrasonic and eddy current detection facility and various concerned welders and the full inspecting and marking equipment and so on.

    Another one is that we have one full service system including the efficient purchase ability, the quality control organization, the convenient logistics and the open ways of payment and so on. In one word, we would serve you based on the complete service system, best but competitive products and the mutual profitable business minds.

    Meanwhile, don't hesitate to contact me at your convenience if you would like know more details in further.

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