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Seamless Steel Pipe

Seamless Pipes

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Discover the Excellence of Seamless Steel Pipes from Our Factory

Specifications Range

Our seamless steel pipes are designed to meet a wide range of industrial requirements, offering exceptional performance and reliability. Here’s a snapshot of our specifications:

  • Outer Diameter: 1/4 inch – 36 inch
  • Wall Thickness: 1.25 mm – 50 mm
  • Length: 3.0m – 18m

Types of Seamless Carbon Steel Pipe from Our Factory

We provide a variety of seamless carbon steel pipes tailored for different applications:

  1. Structure Purposes: Ideal for general structural and mechanical uses.
  2. Liquid Services: Perfect for conveying petroleum, gas, and other fluids.
  3. Low and Medium Pressure: Suitable for steam and boiler manufacturing.
  4. Hydraulic Pillar Service: Designed for hydraulic support applications.
  5. Auto Semi-shaft Casing: Used in auto semi-shaft casing.
  6. Line Pipe: Essential for oil and gas conveying.
  7. Tubing and Casing: Used in the oil and gas industry for conveying purposes.
  8. Drill Pipes: Integral for well drilling operations.
  9. Geological Drilling Pipes: Used in geological drilling.
  10. Petroleum Cracking Tubes: Essential for furnace tubes, heat exchangers.

Chemical Composition and Mechanical Properties

standard Grade Chemical Components (%) Mechanical Properties
C Si Mn P S Tensile STrength(Mpa) Yield STrength(Mpa)
ASTM A53 A ≤0.25 – ≤0.95 ≤0.05 ≤0.06 ≥330 ≥205
B ≤0.30 – ≤1.2 ≤0.05 ≤0.06 ≥415 ≥240
ASTM A106 A ≤0.30 ≥0.10 0.29-1.06 ≤0.035 ≤0.035 ≥415 ≥240
B ≤0.35 ≥0.10 0.29-1.06 ≤0.035 ≤0.035 ≥485 ≥275
ASTM A179 A179 0.06-0.18 – 0.27-0.63 ≤0.035 ≤0.035 ≥325 ≥180
ASTM A192 A192 0.06-0.18 ≤0.25 0.27-0.63 ≤0.035 ≤0.035 ≥325 ≥180
API 5L PSL1 A 0.22 – 0.9 0.03 0.03 ≥331 ≥207
B 0.28 – 1.2 0.03 0.03 ≥414 ≥241
X42 0.28 – 1.3 0.03 0.03 ≥414 ≥290
X46 0.28 – 1.4 0.03 0.03 ≥434 ≥317
X52 0.28 – 1.4 0.03 0.03 ≥455 ≥359
X56 0.28 – 1.4 0.03 0.03 ≥490 ≥386
X60 0.28 – 1.4 0.03 0.03 ≥517 ≥448
X65 0.28 – 1.4 0.03 0.03 ≥531 ≥448
X70 0.28 – 1.4 0.03 0.03 ≥565 ≥483
API 5L PSL2 B 0.24 – 1.2 0.025 0.015 ≥414 ≥241
X42 0.24 – 1.3 0.025 0.015 ≥414 ≥290
X46 0.24 – 1.4 0.025 0.015 ≥434 ≥317
X52 0.24 – 1.4 0.025 0.015 ≥455 ≥359
X56 0.24 – 1.4 0.025 0.015 ≥490 ≥386
X60 0.24 – 1.4 0.025 0.015 ≥517 ≥414
X65 0.24 – 1.4 0.025 0.015 ≥531 ≥448
X70 0.24 – 1.4 0.025 0.015 ≥565 ≥483
X80 0.24 – 1.4 0.025 0.015 ≥621 ≥552

Standards and Applications

Our seamless steel pipes adhere to various international standards, ensuring quality and reliability across different applications:

  • API Standards:
    • API 5L: Line pipe for pipeline transportation systems.
    • API 5CT: Tubing and casing for wells.
    • API 5DP: Drill pipe for well drilling.
  • ASTM Standards:
    • ASTM A53: Used as structural steel or for low-pressure plumbing.
    • ASTM A106: Seamless carbon steel pipe for high-temperature service.
    • ASTM A335: Seamless ferritic alloy-steel pipe for high-temperature service.
    • ASTM A213: Seamless ferritic and austenitic alloy-steel boiler, superheater, and heat-exchanger tubes.
    • ASTM A179: Seamless cold-drawn low-carbon steel heat-exchanger and condenser tubes.
    • ASTM A192: Seamless carbon steel boiler tubes for high-pressure service.
    • ASTM A210: Seamless medium-carbon steel boiler and superheater tubes.
    • ASTM A333: Seamless steel pipe for low-temperature service and other applications requiring notch toughness.
    • ASTM A519: Seamless carbon and alloy steel mechanical tubing.
    • ASTM A252: Seamless and welded steel pipe piles.
  • DIN Standards:
    • DIN 17175: For heat-resistant seamless steel pipe lines.
    • DIN 1629: For seamless circular tubes of non-alloy steels with special quality requirements.
    • DIN 2391: For cold-drawn or cold-rolled precision seamless steel tubes.
  • JIS Standards:
    • JIS G3454: Seamless carbon steel pipe for pressure service.
    • JIS G3456: Seamless carbon steel pipe for high-temperature service.
    • JIS G3461: Seamless carbon steel pipe for boiler and heat exchanger.
  • EN Standards:
    • EN 10210: For hot-finished seamless structural hollow sections of non-alloy steels.
    • EN 10216: Seamless steel tubes for pressure purposes.
  • BS Standards:
    • BS 3059: For carbon, alloy, and austenitic stainless steel tubes with specified elevated temperature properties.

Dimension Tolerances of Seamless Carbon Steel Pipe

Our seamless carbon steel pipes are manufactured with precise dimension tolerances to ensure high quality and performance:

  • Hot Rolled Pipes:
    • Outer Diameter (OD):
      • < 50 mm: ±0.50 mm
      • ≥ 50 mm: ±1%
    • Wall Thickness (WT):
      • < 4 mm: ±12.5%
      • 4 – 20 mm: +15%, -12.5%
      • 20 mm: ±12.5%
  • Cold Drawn Pipes:
    • Outer Diameter (OD):
      • 6 – 10 mm: ±0.20 mm
      • 10 – 30 mm: ±0.40 mm
      • 30 – 50 mm: ±0.45 mm
      • 50 mm: ±1%
    • Wall Thickness (WT):
      • < 1 mm: ±0.15 mm
      • 1 – 3 mm: ++ 15%, – 10%
      • >3mm   + 12.5%, – 10%
Process

Specification
NOMINAL  PIPE  SIZE OD

(mm)

  

NOMINAL WALL THICKNESS
DN NB(inch) ASME SCH10 SCH20 SCH30 STD SCH40 SCH60 XS SCH80 SCH100 SCH120 SCH140 SCH160 XXS
15 1/2″ 21.3 2.11 2.41 2.77 2.77 3.73 3.73 4.78 7.47
20 3/4″ 26.7 2.11 2.41 2.87 2.87 3.91 3.91 5.56 7.82
25 1″ 33.4 2.77 2.9 3.38 3.38 4.55 4.55 6.35 9.09
32 1.1/4″ 42.2 2.77 2.97 3.56 3.56 4.85 4.85 6.35 9.7
40 1.1/2″ 48.3 2.77 3.18 3.68 3.68 5.08 5.08 7.14 10.15
50 2″ 60.3 2.77 3.18 3.91 3.91 5.54 5.54 8.74 11.07
65 2.1/2″ 73 3.05 4.78 5.16 5.16 7.01 7.01 9.53 14.02
80 3″ 88.9 3.05 4.78 5.49 5.49 7.62 7.62 11.13 15.25
90 3.1/2″ 101.6 3.05 4.78 5.74 5.74 8.08 8.08
100 4″ 114.3 3.05 4.78 6.02 6.02 8.56 8.56 11.13 13.49 17.12
125 5″ 141.3 3.4 6.55 6.55 9.53 9.53 12.7 15.88 19.05
150 6″ 168.3 3.4 7.11 7.11 10.97 10.97 14.27 18.26 21.95
200 8″ 219.1 3.76 6.35 7.04 8.18 8.18 10.31 12.7 12.7 15.09 18.26 20.62 23.01 22.23
250 10″ 273 4.19 6.35 7.8 9.27 9.27 12.7 12.7 15.09 18.26 21.44 25.4 28.58 25.4
300 12″ 323.8 4.57 6.35 8.38 9.53 10.31 14.27 12.7 17.48 21.44 25.4 28.58 33.32 25.4
350 14″ 355.6 6.35 7.92 9.53 9.53 11.13 15.09 12.7 19.05 23.83 27.79 31.75 35.71
400 16″ 406.4 6.35 7.92 9.53 9.53 12.7 16.66 12.7 21.44 26.19 30.96 36.53 40.19
450 18″ 457.2 6.35 7.92 11.13 9.53 14.27 19.05 12.7 23.83 39.36 34.93 39.67 45.24
500 20″ 508 6.35 9.53 12.7 9.53 15.09 20.62 12.7 26.19 32.54 38.1 44.45 50.01
550 22″ 558.8 6.35 9.53 12.7 9.53 22.23 12.7 28.58 34.93 41.28 47.63 53.98
600 24″ 609.6 6.35 9.53 14.27 9.53 17.48 24.61 12.7 30.96 38.89 46.02 52.37 59.54
650 26″ 660.4 7.92 12.7 9.53 12.7
700 28″ 711.2 7.92 12.7 15.88 9.53 12.7
750 30″ 762 7.92 12.7 15.88 9.53 12.7
800 32″ 812.8 7.92 12.7 15.88 9.53 17.48 12.7
850 34″ 863.6 7.92 12.7 15.88 9.53 17.48 12.7
900 36″ 914.4 7.92 12.7 15.88 9.53 19.05 12.7
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Related Posts
Seamless steel pipe

Carbon steel seamless pipe is used in a range of applications in all different industries, including petrochemical, environmental, energy, and more. Thanks to more than 100 years of combined experience and vast knowledge across multiple industries, we can help match you with the right product for your unique application. Our friendly, knowledgeable customer service representatives will listen to your needs and can offer suggestions to get you products that meet your requirements.

Structural Seamless Steel Pipe

Structural seamless steel pipes are critical components in numerous industries due to their strength, durability, and versatility. These pipes are manufactured without seams, providing a uniform structure that can withstand high pressure and mechanical stress. This makes them suitable for mechanical and pressure applications and ordinary uses in steam, water, gas, and air lines. They are also ideal for welding and forming operations involving coiling, bending, and flanging, subject to certain qualifications.

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Boiler Steel Pipes are critical components in many industrial applications, providing reliable performance under extreme conditions. By adhering to strict quality standards and understanding the key properties and classifications of these tubes, industries can ensure the safe and efficient operation of their thermal systems.

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Mechanical steel tubes are essential for a variety of industrial applications requiring high strength, precision, and durability. The choice of material—whether carbon steel, alloy steel, or stainless steel—depends on the specific requirements of the application, such as mechanical properties, corrosion resistance, and ease of machining.

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JIS G3429 sets rigorous standards for seamless steel pipes used in high-pressure gas cylinders, ensuring they possess the necessary strength, toughness, and durability. By adhering to these standards, manufacturers can produce high-quality, reliable cylinders that safely store and transport gases under high pressure, meeting the demands of various industrial, medical, and safety applications.