ERW Pipes

Name: ERW Pipes
Brand: JAYANT IMPEX
Price: 60.0 INR
Availability: InStock

60.0 INR/Piece

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Product Details:

Temperature Range -20C to +400C
Coating Type Black Paint, Zinc Galvanized
Thread Type As per requirement
Bend Radius As per Diameter, Not intended for cold bending
Tolerance 0.5 mm
Diameter 21.3 mm - 508 mm
Sealing Type Dependent on Application
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ERW Pipes Price And Quantity

Price 60.0 INR/Piece
Minimum Order Quantity 1 Piece

ERW Pipes Product Specifications

Temperature Range -20C to +400C
Length 6 m / 12 m / Custom Length
Color Black with Blue Ends
Rated Pressure As Per Standard Specification
Outer Diameter 21.3 mm to 508 mm
Standard ASTM A53, IS 1239, BS 1387
Thread Type As per requirement
Bend Radius As per Diameter, Not intended for cold bending
Product Type ERW Pipes
Coating Type Black Paint, Zinc Galvanized
Material Grade IS 1239, ASTM A53 Gr. A/B, API 5L Gr. B
Surface Treatment Black Painted, Galvanized
Connection Plain End / Beveled End
Shape Round
Sealing Type Dependent on Application
Diameter 21.3 mm - 508 mm
Tolerance 0.5 mm
Usage Industrial, Water, Plumbing, Structural
Flexibility Rigid
Application Oil and Gas Transmission, Water Supply, Construction
Thickness 2 mm to 12 mm
Connection Type Plain, Screwed, Grooved
Material Mild Steel / Carbon Steel
Yield Strength 195 - 415 MPa
Section Shape Circular
Tensile Strength 330 - 550 MPa

Corrosion Resistance High (if galvanized/coated)
End Protection Plastic Caps on Ends
Weight As per size & thickness
Manufacturing Process Cold Formed from Hot Rolled Coil
Packing Bundles with Steel Strips / Loose
Inspection 100% Hydrostatic & Eddy Current Tested
Welding Type Electric Resistance Welded (ERW)

Product Description

ERW (Electric Resistance Welded) pipes are manufactured by cold-forming a flat steel strip (skelp) into a cylindrical shape and passing an electric current across the meeting edges to fuse them together through resistance heating.

Unlike conventional arc welding processes, modern ERW pipe manufacturing requires no filler metalthe bond relies entirely on high-frequency electrical current (HFW) combined with mechanical pressure from squeeze rolls.

Manufacturing Process

Modern high-frequency welding (HFW) typically follows a multi-step continuous line:

Uncoiling & Leveling: Hot-rolled coil steel strip is uncoiled, flattened, and trimmed to precise width.
Cold Roll Forming: A series of roller dies progressively bend the flat strip into a open circular profile.
High-Frequency Welding: High-frequency current (typically 100 kHz to 500 kHz) concentrates along the meeting edges. The localized electrical resistance heats the steel to its forging temperature (~1350C to 1400C).
Squeeze & Flash Removal: Squeeze rolls press the molten edges together to form a solid forged bond. Continuous cutting tools scrape away excess internal and external weld flash (bead).
Seam Heat Treatment: The heat-affected zone (HAZ) is inline induction-annealed to normalize the microstructure and restore mechanical toughness around the weld seam.
Sizing & NDT Inspection: The tube is sized to exact outer diameter tolerances and passed through non-destructive ultrasonic or eddy-current testing before final hydrostatic testing.

Comparison: ERW vs. Seamless vs. LSAW

Feature	ERW (Electric Resistance Welded)	Seamless (SMLS)	LSAW (Longitudinal Submerged Arc)
Raw Material	Hot-Rolled Strip / Coil	Solid Steel Billet	Heavy Steel Plate
Filler Metal	None (Forged seam)	None (Solid extrusion/piercing)	Wire & Flux (Submerged arc)
Diameter Range	1/2" to 24" (DN15 DN600)	1/8" to 26" (DN6 DN650)	16" to 60"+ (DN400 DN1500+)
Wall Thickness	Light to medium	Medium to heavy	Heavy / Extra-heavy
Dimensional Tolerance	Extremely uniform wall thickness	Variable wall eccentricity	Very precise
Cost Efficiency	High (Cost-effective for long runs)	Higher manufacturing cost	Higher per-ton production cost

Key Standards & Material Grades

ERW pipes are specified across major international standards based on operating pressure and application:

ASTM A53 / A135 / A500: General structural, plumbing, and low-pressure fluid transport (Grades A, B, C).
API 5L (Line Pipe): Oil and gas transportation lines (Grades B through X70; PSL1 and PSL2 levels).
EN 10217-1 / EN 10255: European pressure purposes and non-alloy steel tubes (e.g., P235TR1, S235JR).
DIN 2458 / ISO 3183: Metric dimensional and delivery standards for welded steel pipes.

Common Applications

Fluid Transport: Low-to-medium pressure water mains, fire protection lines, HVAC chilled water, and gas distribution.
Oil & Gas Gathering: Onshore flowlines and transmission pipelines operating under moderate pressure regimes.
Structural & Mechanical: Scaffolding, piling, hollow structural sections (HSS), automotive shafts, and furniture tubing.
Casing & Tubing: Low-depth water wells and shallow oil/gas well casing (API 5CT ERW grades).

Precision Engineering and Surface Protection

Our ERW pipes are crafted with meticulous attention to detail, employing a cold-forming process from hot rolled coils. Each pipe undergoes rigorous hydrostatic and eddy current testing, with end protection provided by durable plastic caps. A high-quality external coating-either black paint or zinc galvanization-further shields the pipes from corrosion and mechanical wear, ensuring longevity even in harsh environments.

Versatile Applications and Customization

ERW Pipes are extensively employed across industries for water supply, oil and gas transmission, construction, plumbing, and various structural applications. Available in a wide range of diameters (21.3 mm to 508 mm) and thicknesses (2 mm to 12 mm), with customizable lengths and ends (plain, beveled, screwed, threaded), they provide adaptable solutions meeting standard specifications and demanding project requirements.

FAQ's of ERW Pipes:

Q: How are ERW Pipes with end protection manufactured?

A: These pipes are produced using Electric Resistance Welding (ERW), where cold-formed pipes are shaped from hot rolled coils and joined via a high-frequency electric current along the seam. End protection is added by fitting plastic caps to prevent damage during transit and handling.

Q: What advantages do galvanized or coated ERW pipes offer?

A: Galvanized or zinc-coated ERW pipes exhibit high corrosion resistance, making them suitable for water, oil, gas, and industrial applications. The protective coating extends the service life, particularly in environments where pipes are exposed to moisture or chemicals.

Q: When should ERW Pipes be used in construction and industrial projects?

A: ERW Pipes are ideal for structural, water supply, plumbing, and oil and gas transmission projects requiring precision, strength, and reliable performance. Their adaptability in length, diameter, and finish supports diverse and custom project requirements.

Q: Where are these pipes commonly supplied and who can purchase them in India?

A: These pipes are widely available from dealers, exporters, fabricators, manufacturers, producers, retailers, suppliers, and traders across India, supporting a wide distribution network for timely and reliable supply.

Q: What is the inspection and quality assurance process for these pipes?

A: Each ERW pipe undergoes 100% hydrostatic and eddy current testing. These stringent inspections ensure every pipe meets the required tolerance (0.5 mm) and quality standards such as ASTM A53, IS 1239, and BS 1387 before dispatch.

Q: How do end caps benefit ERW pipes during transportation and installation?

A: Plastic caps on pipe ends protect against mechanical damage, contamination, and corrosion ingress, ensuring pipes reach their destination in optimal condition and maintain structural integrity during storage and installation.

Q: What type of surface treatment is available for ERW pipes?

A: Surface treatments include black painting and zinc galvanizing. These finishes enhance corrosion resistance, extend the pipe's lifespan, and are selected based on the intended use and environmental exposure conditions.

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