Welded Stainless Steel Pipe: Comprehensive Guide

Welcome to Amardeep Steel Centre’s definitive guide on welded stainless steel pipe. Here, we delve into everything you need to know about these essential components in the construction and industrial sectors. From manufacturing processes to size considerations and supplier insights, let’s explore how SS welded pipes are integral to your projects.

Understanding Welded Stainless Steel Pipes

Welded SS pipes are crafted from strips of stainless steel that are welded together to form a tubular structure. These pipes offer excellent strength, durability, and corrosion resistance, making them ideal for various applications across industries such as oil and gas, chemical processing, automotive, and structural engineering.

Type of SS Welded Pipes

  1. Stainless Steel ERW Pipes (Electric Resistance Welding):
    • Process: Formed from strips of stainless steel that are passed through forming rolls and welded longitudinally by electric resistance welding.
    • Advantages: Cost-effective, suitable for both thin and thick-walled pipes, and ideal for applications with low to medium pressures.
    • Applications: Used in structural, plumbing, and mechanical applications where corrosion resistance and precise dimensions are critical.
  2. Stainless Steel EFW Pipes (Electric Fusion Welding):
    • Process: Manufactured by rolling plate and welding the seam by fusion welding process under an electric arc.
    • Advantages: Offers high strength and durability, suitable for high-pressure applications.
    • Applications: Widely used in industries such as oil and gas, chemical processing, and power generation where corrosion resistance and reliability are essential.
  3. Stainless Steel SAW Pipes (Submerged Arc Welding):
    • Process: Produced by welding an arc submerged beneath a layer of granular flux.
    • Advantages: High welding speed, capable of producing strong welds in thick-walled pipes.
    • Applications: Commonly used in marine and offshore applications, structural piping, and construction projects where durability and resistance to corrosion are crucial.
  4. Stainless Steel Spiral Welded Pipes:
    • Process: Formed by twisting strips of stainless steel into a spiral shape and welding the seam along the spiral.
    • Advantages: Provides strength and versatility, reduces stress and static in pipelines due to the natural spiral shape.
    • Applications: Used in transportation of fluids such as oil and gas, water distribution systems, and where high strength and corrosion resistance are required.
Aluminium ERW processed pipes

ERW (Electric Resistance Welded) Stainless Steel Pipe

2 big EFW stainless steel pipes

EFW (Electric Fusion Welded) Stainless Steel Pipe

bulk stack of Spiral Welded pipes

Spiral Weld Stainless Steel Pipe

SAW aluminium processed pipes stored

SAW (Submerged Arc Welded) Stainless Steel Pipe

Schedule Chart for Welded SS Pipes

Pipe Type Schedule Wall Thickness (inches) Diameter (inches)
Stainless Steel ERW Pipes 5S 0.065 1/8 to 12
10S 0.083 1/8 to 24
40S 0.109 1/8 to 24
Stainless Steel EFW Pipes 10 0.109 2 to 24
40 0.156 2 to 24
80 0.218 2 to 24
Stainless Steel SAW Pipes STD 0.237 10 to 72
XS 0.337 10 to 72
XXS 0.500 10 to 72
Stainless Steel Spiral Welded Pipes 20 0.250 6 to 144
40 0.375 6 to 144
80 0.500 6 to 144

Mechanical Properties Chart for SS Welded Pipes

Property ERW Pipes EFW Pipes SAW Pipes Spiral Welded Pipes
Tensile Strength (MPa) High Very High High High
Yield Strength (MPa) Moderate to High High High High
Elongation (%) 20-35 25-40 20-30 20-35
Hardness (HV) 150-250 HV 180-280 HV 160-260 HV 150-250 HV
Impact Strength (J) Good Excellent Good Good

Specifications Chart for Stainless Steel Welded Pipes

Specification ERW Pipes EFW Pipes SAW Pipes Spiral Welded Pipes
ASTM A312 / A358 Yes Yes – –
ASTM A249 / A269 Yes – – –
ASTM A53 / A106 Yes – – –
API 5L / 5LC – Yes Yes –
DIN 2458 / 1626 Yes Yes Yes Yes

Chemical Composition Chart for Stainless Steel Welded Pipes

Element ERW Pipes EFW Pipes SAW Pipes Spiral Welded Pipes
Carbon (C) ≤ 0.08% ≤ 0.08% ≤ 0.08% ≤ 0.08%
Manganese (Mn) ≤ 2.00% ≤ 2.00% ≤ 2.00% ≤ 2.00%
Phosphorus (P) ≤ 0.045% ≤ 0.045% ≤ 0.045% ≤ 0.045%
Sulfur (S) ≤ 0.030% ≤ 0.030% ≤ 0.030% ≤ 0.030%
Silicon (Si) ≤ 1.00% ≤ 1.00% ≤ 1.00% ≤ 1.00%
Chromium (Cr) 18.0 – 20.0% 18.0 – 20.0% 18.0 – 20.0% 18.0 – 20.0%
Nickel (Ni) 8.0 – 11.0% 8.0 – 11.0% 8.0 – 11.0% 8.0 – 11.0%

Application Chart for Stainless Steel Welded Pipes

Application ERW Pipes EFW Pipes SAW Pipes Spiral Welded Pipes
Construction Structural support High-pressure systems Bridges, buildings Water distribution
Oil and Gas Transmission lines Pipelines Offshore platforms Oil and gas pipelines
Chemical Processing Process piping Chemical plants Chemical transfer Chemical transportation
Power Generation Boiler tubes Heat exchangers Power plants Power distribution
Water Treatment Water supply Sewage systems Water treatment plants Sewage transportation

Manufacturing Process of Stainless Welded Steel Pipes

The manufacturing process of welded stainless steel pipes involves several key steps:

  1. Material Preparation: Stainless steel strips or plates are inspected and prepared for forming.
  2. Forming: The strips or plates are shaped into cylindrical forms either through cold forming or hot forming methods.
  3. Welding: Longitudinal welding is performed using either Electric Resistance Welding (ERW), Electric Fusion Welding (EFW), Submerged Arc Welding (SAW), or Spiral Welding techniques.
  4. Sizing and Straightening: The welded pipes undergo sizing to meet dimensional specifications and straightening to ensure alignment.
  5. Finishing and Testing: Pipes are finished to remove imperfections and undergo various tests to ensure quality, including pressure testing and non-destructive testing (NDT).

Global Reach

Amardeep Steel Centre boasts a robust global presence, committed to delivering unparalleled service and quality to clients around the world. Our dedication to prompt delivery and exceptional customer care sets us apart in the industry. Major corporations across the USA, Europe, Asia, and other regions place their trust in our high-quality stainless steel welded pipes. This widespread trust underscores our reputation for reliability and excellence. By consistently meeting and exceeding the expectations of our international clientele, we continue to solidify our position as a leader in the global steel market.

Metal globe

Countries We Export To

UNITED STATES, EUROPE, UK, UAE, SAUDI ARABIA, OMAN, KUWAIT, JORDAN, QATAR, INDONESIA, MALAYSIA, BRAZIL, SPAIN, ITALY, FRANCE, GERMANY, BAHRAIN, SRI LANKA, AZERBAIJAN, AUSTRALIA, AUSTRIA, PHILIPPINES, TURKEY, RUSSIA, IRAN, IRAQ, CANADA, KOREA, JAPAN, YEMEN, FINLAND, ZIMBABWE, HUNGARY, PORTUGAL, VIETNAM, MOROCCO, THAILAND, SOUTH AFRICA, MEXICO, SINGAPORE, GREECE, KUWAIT, POLAND, NEW ZEALAND, SWEDEN, SWITZERLAND, BELGIUM, BHUTAN, BANGLADESH, TAIWAN, ROMANIA, CAMBODIA, KAZAKHSTAN, AFGHANISTAN.

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