ERW Steel Pipe

Forever Steel Manufacturing Co., Ltd
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ERW Steel Pipe

Premium ERW Steel Pipe
ASTM A53 Grade B ERW steel pipe for construction and gas
Hot dipped galvanized ERW pipe for water transportation
Black steel ERW pipe with plain ends for mechanical use
black varnish painted pipes ready for marking

Product Name: ERW Steel Pipe, Electric Resistance Welded Pipe, ERW CS Pipe, EFW Steel Pipe

Outer Diameter: 1/2"-28"

Wall Thickness: 1.65-20mm (SCH40, SCH80, SCH160, SCHXS, SCHXXS, All Schedules)

Length: 5.8-12M or As Customer Requirement

Standard: ASTM 5L, ASTM A53, ASTM A178, ASTM A500/501, ASTM A691, ASTM A252, ASTM A672, EN 10217

Packing: Bundled/In Bulk, Plastic Caps Plugged, Waterproof Paper Wrapped

  • Overview
  • Specification
  • Standard
  • Process
  • FAQ

ERW stands for Electric Resistance Welding.
Electric Resistance Welded (ERW) steel pipes represent a cornerstone of modern industrial piping solutions. Manufactured through high-frequency induction welding of premium hot-rolled coils, ERW pipes provide a high-performance, cost-effective alternative to seamless pipes for a wide range of mid-stream and structural applications.


1. Technical Specifications & Size Range

Outside Diameter (O.D.):1/2" – 24" (21.3mm – 660mm)

Wall Thickness (W.T.):2.0mm – 20mm (SCH 10, SCH 20, SCH 40, SCH 80, SCH 160, STD, XS)

Single Pipe Length: SRL (Single Random Length):5m – 7m

DRL (Double Random Length):10m – 12.8m

Fixed Length:Customized up to 18 meters for special projects.


2. Global Manufacturing Standards & Steel Grades

We support multi-national standards to facilitate seamless integration into global supply chains:

Region / Standard

Common Standards

Available Steel Grades

American (API/ASTM)

API 5L (PSL1/PSL2), ASTM A53, ASTM A500

Grade B, X42, X46, X52, X56, X60, X70

European (EN/DIN)

EN 10219, EN 10217, DIN 2458

S235JR, S275JR, S355J2H, P235TR1/TR2

Japanese (JIS)

JIS G3444, JIS G3452

STK400, STK500, SGP

Australian (AS/NZS)

AS/NZS 1163, AS/NZS 1074

C250, C350, C450

German (DIN)

DIN 1626, DIN 17120

St37.0, St44.0, St52.0


3. Pipe End Preparation

To ensure efficient on-site installation, we offer professional end finishing:

Bevelled Ends:Standard 30° (+5°/-0°) with 1.6mm root face (per ANSI B16.25) for easy welding.

Plain Ends:Square cut for structural use or socket welding.

Threaded & Coupled (T&C):Precise threading according to API 5B or ASTM standards.

Grooved Ends:Suitable for rapid mechanical coupling systems.


4. Surface Treatment & Corrosion Protection

Customized coating solutions to protect against atmospheric and soil corrosion:

Temporary Protection:Black Vanish painting, Light Oiling.

High-Durability Coating:Hot-Dipped Galvanized (HDG) – Zinc coating up to500g/m².

Advanced Anti-Corrosion:3PE (Three-Layer Polyethylene), FBE (Fusion Bonded Epoxy), or 3PP coating for underground burial.


5. Packaging & Logistics Excellence

We understand that long-distance international shipping requires superior packaging to prevent damage:

Hexagonal Bundling:Small diameter pipes are bundled with high-tensile steel strips and heavy-duty nylon lifting slings.

End Protection:Heavy-duty plastic caps or metal ring protectors to safeguard bevels and threads.

Sea-Worthy Marking:Each pipe is stenciled withHeat No., Size, Grade, Standard, and Manufacturer Logo(Customized marking supported).

Loading Precautions:

Use of wooden dunnage and rubber separators to prevent steel-on-steel friction.

Rigid bracing and lashing within containers or bulk vessels to prevent shifting during transit.


6. Quality Assurance (QA/QC)

Mill Test Certificate (MTC):Issued according toEN 10204 3.1or 3.2.

Third-Party Inspection:We welcome and facilitate inspections by SGS, BV, TUV, or Lloyd's Register.

Testing Protocol:100% Hydrostatic Test, Online Ultrasonic (UT) of weld seams, and Flattening/Bending tests.


7.Strategic Application Sectors

ERW steel pipes are engineered to deliver reliability across diverse and demanding environments:

a. Energy & Hydrocarbon Infrastructure

A primary solution for the gathering and transmission of crude oil, natural gas, and refined petroleum. ERW pipes are highly valued in the energy sector for their balance of high tensile strength and economic viability.


b. Public Utilities & Water Management

Essential for large-scale municipal water supply systems, irrigation networks, and sewage treatment facilities. Their compatibility with various anti-corrosion linings ensures a long service life in underground environments.


c. Structural Engineering & Construction

Extensively utilized in the construction of airports, stadiums, and high-rise buildings as structural hollow sections (HSS). They offer excellent load-bearing capabilities for piling, trusses, and decorative architectural frameworks.


d. Industrial & Fire Safety Systems

The industry standard for fire-protection sprinkler systems and low-pressure steam/air conveyance. Their durability ensures system integrity during critical emergency responses.


e. Mechanical & Automotive Manufacturing

High-precision ERW tubes are vital components in the automotive industry (chassis and steering columns) and the manufacturing of heavy-duty machinery, rollers, and conveyor systems.

ERW Steel Pipe Size Specifications Sheet

Outer Diameter (OD) Wall Thickness (WT) Range Length Range Common Schedule / Standards
1/2" (21.3 mm) 1.50 mm – 2.80 mm 5.8m – 12.0m SCH 40, SCH 80
3/4" (26.7 mm) 1.50 mm – 3.00 mm 5.8m – 12.0m ASTM A53, BS 1387
1" (33.4 mm) 1.65 mm – 4.55 mm 5.8m – 12.0m Water & Gas Service
1-1/4" (42.2 mm) 1.65 mm – 4.85 mm 5.8m – 12.0m Structural / Scaffolding
1-1/2" (48.3 mm) 1.65 mm – 5.08 mm 5.8m – 12.0m SCH 40, SCH 80
2" (60.3 mm) 1.65 mm – 6.00 mm 5.8m – 12.0m ASTM A53 / API 5L
2-1/2" (73.0 mm) 2.11 mm – 7.01 mm 5.8m – 12.0m Fire Sprinkler Systems
3" (88.9 mm) 2.11 mm – 8.00 mm 5.8m – 12.0m SCH 10, 40, 80
4" (114.3 mm) 2.11 mm – 10.00 mm 5.8m – 12.0m Standard Line Pipe
5" (141.3 mm) 2.77 mm – 12.00 mm 5.8m – 12.0m Fluid Transmission
6" (168.3 mm) 2.77 mm – 12.70 mm 5.8m – 12.0m SCH 40, SCH 80
8" (219.1 mm) 3.20 mm – 14.27 mm 5.8m – 12.0m Oil & Gas Conveyance
10" (273.1 mm) 3.50 mm – 15.00 mm 5.8m – 12.0m Structural Piling
12" (323.9 mm) 4.00 mm – 16.00 mm 5.8m – 12.0m ASTM A252 Gr. 2/3
14" (355.6 mm) 4.50 mm – 16.00 mm 5.8m – 12.0m Large Structural Tubes
16" (406.4 mm) 5.00 mm – 16.00 mm 5.8m – 12.0m Pumping Stations
18" (457.0 mm) 5.50 mm – 18.00 mm 5.8m – 12.0m Low-pressure Gas
20" (508.0 mm) 6.00 mm – 20.00 mm 5.8m – 12.0m Municipal Water Works
24" (609.6 mm) 6.35 mm – 20.00 mm 5.8m – 12.0m Maximum ERW Diameter


ERW steel pipe chemical components and mechanical properties sheet

    Chemical Components (%) Mechanical Properties Impact Test
Standard Grade C (%) max Mn (%) max P (%) max S (%) max Yield Strength (MPa) min Tensile Strength(MPa) min CVN Impact Energy (J) min

API 5L

(Line Pipe)

B (PSL1) 0.28 1.2 0.03 0.03 245 415 Not Required
B (PSL2) 0.24 1.2 0.025 0.015 245 – 450 415 – 655 27 J @ 0°C
X42 (PSL1) 0.28 1.3 0.03 0.03 290 415 Not Required
X42 (PSL2) 0.24 1.3 0.025 0.015 290 – 495 415 – 655 27 J @ 0°C
X52 (PSL1) 0.28 1.4 0.03 0.03 360 460 Not Required
X52 (PSL2) 0.24 1.4 0.025 0.015 360 – 530 460 – 760 27 J @ 0°C
X60 (PSL1) 0.28 1.4 0.03 0.03 415 520 Not Required
X60 (PSL2) 0.24 1.4 0.025 0.015 415 – 565 520 – 760 27 J @ 0°C
X70 (PSL1) 0.28 1.4 0.03 0.03 485 570 Not Required
X70 (PSL2) 0.24 1.4 0.025 0.015 485 – 635 570 – 760 27 J @ 0°C
ASTM A53 Grade A 0.25 0.95 0.05 0.045 205 330 Not Required
Grade B 0.3 1.2 0.05 0.045 240 415 Not Required

EN 10219

(Structural)

S235JRH 0.17 1.4 0.04 0.04 235 360 – 510 27 J @ 20°C
S275J0H 0.2 1.5 0.035 0.035 275 410 – 560 27 J @ 0°C
S355J2H 0.22 1.6 0.03 0.03 355 470 – 630 27 J @ −20°C
AS/NZS 1163 C250 / L0 0.2 1.6 0.04 0.03 250 320 27 J @ 0°C
C350 / L0 0.2 1.6 0.04 0.03 350 430 27 J @ 0°C

ERW Pipe Standards Dimensional Tolerances Sheet

Standard Outside Diameter (D) Wall Thickness (t) Length (L)
API 5L(Line Pipe)

Pipe Body:0.75

Pipe End: ±0.020 in (0.5 mm) or ±0.5%, whichever is less

t≤0.197 in: +0.024 in / −0.020 in

0.197in<t<0.591 in: +15%/−12.5

% t≥0.591 in: +1.5 mm / −1.2 mm

Random: ±1.64 ft (0.5 m)

Fixed: −0/+2 in (50 mm)

ASTM A53(General Use)

≤ NPS 1 1/2: ±1/64 in (0.4 mm

 ≥ NPS 2: ±1%

All Sizes: −12.5%

(No upper limit specified, usually follows manufacturing capability)

Single Random: 16–22 ft min.

Fixed: ±0.25 in (or per agreement)

EN 10219(Structural)

D≤406.4 mm: ±1% (min ±0.5 mm

 D>406.4 mm: ±0.75%

D≤406.4 mm: ±10%

D>406.4 mm: ±10% (max ±2 mm)

Fixed Length:<6 m: +10 / 0 mm

≥6 m: +15 / 0 mm

ERW Pipe Production Process

Frequently Asked Questions


1. How do you guarantee the weld quality of ERW steel pipe before shipment?

We implement internal quality control from raw material review to final shipment release. For orders related to water lines, structural applications, scaffolding, and medium-diameter pipeline projects, buyers usually expect the product to match both the application and the supporting ERW steel pipe, ASTM A53, API 5L ERW pipe, and UT inspection on the weld seam requirements.

2. Do you provide UT records, hydro test results, and MTC for ERW steel pipe?

Yes. We can provide Mill Test Certificates according to EN 10204 3.1, and 3.2 can be arranged when required. Third-party inspection by agencies such as SGS, BV, or ABS can also be accepted before shipment.


3. How do you protect ERW pipe ends and bevels during truck transport and sea freight?

We use export-oriented packing and loading methods based on the product type, including end protection, stable bundling or blocking, waterproof wrapping where needed, and careful loading control. The goal is to reduce rust, scratches, bevel damage, face damage, coating damage, thread damage, or handling impact during domestic transport and long sea shipment.


4. Is ERW steel pipe normally used for water lines and structural steel applications?

This product is commonly supplied for water lines, structural applications, scaffolding, and medium-diameter pipeline projects, with buyer demand often tied to ERW steel pipe, ASTM A53, API 5L ERW pipe, and UT inspection on the weld seam.


ERW Steel Pipe Size Specifications Sheet

Outer Diameter (OD) Wall Thickness (WT) Range Length Range Common Schedule / Standards
1/2" (21.3 mm) 1.50 mm – 2.80 mm 5.8m – 12.0m SCH 40, SCH 80
3/4" (26.7 mm) 1.50 mm – 3.00 mm 5.8m – 12.0m ASTM A53, BS 1387
1" (33.4 mm) 1.65 mm – 4.55 mm 5.8m – 12.0m Water & Gas Service
1-1/4" (42.2 mm) 1.65 mm – 4.85 mm 5.8m – 12.0m Structural / Scaffolding
1-1/2" (48.3 mm) 1.65 mm – 5.08 mm 5.8m – 12.0m SCH 40, SCH 80
2" (60.3 mm) 1.65 mm – 6.00 mm 5.8m – 12.0m ASTM A53 / API 5L
2-1/2" (73.0 mm) 2.11 mm – 7.01 mm 5.8m – 12.0m Fire Sprinkler Systems
3" (88.9 mm) 2.11 mm – 8.00 mm 5.8m – 12.0m SCH 10, 40, 80
4" (114.3 mm) 2.11 mm – 10.00 mm 5.8m – 12.0m Standard Line Pipe
5" (141.3 mm) 2.77 mm – 12.00 mm 5.8m – 12.0m Fluid Transmission
6" (168.3 mm) 2.77 mm – 12.70 mm 5.8m – 12.0m SCH 40, SCH 80
8" (219.1 mm) 3.20 mm – 14.27 mm 5.8m – 12.0m Oil & Gas Conveyance
10" (273.1 mm) 3.50 mm – 15.00 mm 5.8m – 12.0m Structural Piling
12" (323.9 mm) 4.00 mm – 16.00 mm 5.8m – 12.0m ASTM A252 Gr. 2/3
14" (355.6 mm) 4.50 mm – 16.00 mm 5.8m – 12.0m Large Structural Tubes
16" (406.4 mm) 5.00 mm – 16.00 mm 5.8m – 12.0m Pumping Stations
18" (457.0 mm) 5.50 mm – 18.00 mm 5.8m – 12.0m Low-pressure Gas
20" (508.0 mm) 6.00 mm – 20.00 mm 5.8m – 12.0m Municipal Water Works
24" (609.6 mm) 6.35 mm – 20.00 mm 5.8m – 12.0m Maximum ERW Diameter


ERW steel pipe chemical components and mechanical properties sheet

    Chemical Components (%) Mechanical Properties Impact Test
Standard Grade C (%) max Mn (%) max P (%) max S (%) max Yield Strength (MPa) min Tensile Strength(MPa) min CVN Impact Energy (J) min

API 5L

(Line Pipe)

B (PSL1) 0.28 1.2 0.03 0.03 245 415 Not Required
B (PSL2) 0.24 1.2 0.025 0.015 245 – 450 415 – 655 27 J @ 0°C
X42 (PSL1) 0.28 1.3 0.03 0.03 290 415 Not Required
X42 (PSL2) 0.24 1.3 0.025 0.015 290 – 495 415 – 655 27 J @ 0°C
X52 (PSL1) 0.28 1.4 0.03 0.03 360 460 Not Required
X52 (PSL2) 0.24 1.4 0.025 0.015 360 – 530 460 – 760 27 J @ 0°C
X60 (PSL1) 0.28 1.4 0.03 0.03 415 520 Not Required
X60 (PSL2) 0.24 1.4 0.025 0.015 415 – 565 520 – 760 27 J @ 0°C
X70 (PSL1) 0.28 1.4 0.03 0.03 485 570 Not Required
X70 (PSL2) 0.24 1.4 0.025 0.015 485 – 635 570 – 760 27 J @ 0°C
ASTM A53 Grade A 0.25 0.95 0.05 0.045 205 330 Not Required
Grade B 0.3 1.2 0.05 0.045 240 415 Not Required

EN 10219

(Structural)

S235JRH 0.17 1.4 0.04 0.04 235 360 – 510 27 J @ 20°C
S275J0H 0.2 1.5 0.035 0.035 275 410 – 560 27 J @ 0°C
S355J2H 0.22 1.6 0.03 0.03 355 470 – 630 27 J @ −20°C
AS/NZS 1163 C250 / L0 0.2 1.6 0.04 0.03 250 320 27 J @ 0°C
C350 / L0 0.2 1.6 0.04 0.03 350 430 27 J @ 0°C

ERW Pipe Standards Dimensional Tolerances Sheet

Standard Outside Diameter (D) Wall Thickness (t) Length (L)
API 5L(Line Pipe)

Pipe Body:0.75

Pipe End: ±0.020 in (0.5 mm) or ±0.5%, whichever is less

t≤0.197 in: +0.024 in / −0.020 in

0.197in<t<0.591 in: +15%/−12.5

% t≥0.591 in: +1.5 mm / −1.2 mm

Random: ±1.64 ft (0.5 m)

Fixed: −0/+2 in (50 mm)

ASTM A53(General Use)

≤ NPS 1 1/2: ±1/64 in (0.4 mm

 ≥ NPS 2: ±1%

All Sizes: −12.5%

(No upper limit specified, usually follows manufacturing capability)

Single Random: 16–22 ft min.

Fixed: ±0.25 in (or per agreement)

EN 10219(Structural)

D≤406.4 mm: ±1% (min ±0.5 mm

 D>406.4 mm: ±0.75%

D≤406.4 mm: ±10%

D>406.4 mm: ±10% (max ±2 mm)

Fixed Length:<6 m: +10 / 0 mm

≥6 m: +15 / 0 mm

ERW Pipe Production Process

Frequently Asked Questions


1. How do you guarantee the weld quality of ERW steel pipe before shipment?

We implement internal quality control from raw material review to final shipment release. For orders related to water lines, structural applications, scaffolding, and medium-diameter pipeline projects, buyers usually expect the product to match both the application and the supporting ERW steel pipe, ASTM A53, API 5L ERW pipe, and UT inspection on the weld seam requirements.

2. Do you provide UT records, hydro test results, and MTC for ERW steel pipe?

Yes. We can provide Mill Test Certificates according to EN 10204 3.1, and 3.2 can be arranged when required. Third-party inspection by agencies such as SGS, BV, or ABS can also be accepted before shipment.


3. How do you protect ERW pipe ends and bevels during truck transport and sea freight?

We use export-oriented packing and loading methods based on the product type, including end protection, stable bundling or blocking, waterproof wrapping where needed, and careful loading control. The goal is to reduce rust, scratches, bevel damage, face damage, coating damage, thread damage, or handling impact during domestic transport and long sea shipment.


4. Is ERW steel pipe normally used for water lines and structural steel applications?

This product is commonly supplied for water lines, structural applications, scaffolding, and medium-diameter pipeline projects, with buyer demand often tied to ERW steel pipe, ASTM A53, API 5L ERW pipe, and UT inspection on the weld seam.


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ERW Steel Pipe Supplier,ASTM A53 Electric Resistance Welded Pipe

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