ERW Steel Pipe
Electric Resistance Welded (ERW) steel pipe is formed by rolling a flat strip into a cylindrical shape and welding the seam using high-frequency induction. This process delivers consistent wall thickness and smooth internal surfaces, making it suitable for structural, conveyance, and low-to-moderate pressure applications where a weld line is acceptable. Jialu holds ERW pipe across carbon, structural, line-pipe, and s
- Weld seam is consistent and controlled, with no heat-affected zone beyond the weld zone, so it meets dimensional and mechanical requirements in standard service
- Carbon, structural, line-pipe, and stainless grades quoted on a single stock list and a single contract
- ASTM, API, DIN, EN and other international standards supplied against one enquiry, so mixed-standard projects stay on one order
- Round, square and rectangle sections available, which keeps structural and process scope with one supplier
Mill certificates issued against the ordered grade and standard. Third-party inspection available on request.
What This Material Is For
Electric Resistance Welded (ERW) steel pipe is formed by rolling a flat strip into a cylindrical shape and welding the seam using high-frequency induction. This process delivers consistent wall thickness and smooth internal surfaces, making it suitable for structural, conveyance, and low-to-moderate pressure applications where a weld line is acceptable. Jialu holds ERW pipe across carbon, structural, line-pipe, and stainless families on one stock list, so a project needing A53 pipe, A500 tubing, A252 piles, and API 5L line pipe does not have to be split across multiple mills and inspection dates. Round, square, and rectangle sections are available from the same order.
Why Buyers Choose It
- Weld seam is consistent and controlled, with no heat-affected zone beyond the weld zone, so it meets dimensional and mechanical requirements in standard service
- Carbon, structural, line-pipe, and stainless grades quoted on a single stock list and a single contract
- ASTM, API, DIN, EN and other international standards supplied against one enquiry, so mixed-standard projects stay on one order
- Round, square and rectangle sections available, which keeps structural and process scope with one supplier
- Third-party inspection can be booked before shipment instead of arranged after the pipe lands
Where It Is Used
- Structural framing and bracing using ASTM A500 Grade B and C in round, square and rectangle sections
- Water and gas conveyance lines in ASTM A53 Grade A and B, including galvanized variants
- Pile foundations and offshore support structures using ASTM A252 Grade 2 and 3
- Oil and gas transmission lines in API 5L PSL1 grades B through X70, with PSL2 available via HFW process
- Oil country tubular strings in API 5CT J55, K55, N80 casing and tubing
- Sanitary and process piping in ASTM A270, A312, A269 and A790 ferritic/austenitic/duplex stainless grades
Who It Is For
- EPC contractors buying mixed-standard pipe scope for a single plant or pipeline package
- Structural fabricators needing A500 tubing and A53 pipe in the same project
- Oilfield distributors stocking casing and tubing against API 5CT
- Food and pharmaceutical processors sourcing sanitary tubing in A270 and A312 grades
- Water and gas utilities specifying A53 and A252 pipe for distribution networks
Problems It Solves
- Splitting one pipe scope across several mills, which multiplies inspection visits and shipment dates
- Delays caused by grade availability when one mill cannot roll a size within the project window
- Mixed ASTM, API, DIN and EN callouts on one drawing set that no single domestic stockist covers
- Late grade substitution when a mill cannot supply a required standard or finish
- Need to manage multiple suppliers for carbon, structural, line-pipe and stainless scopes
Technical Features
- High-frequency electric resistance welding process ensures consistent seam quality and minimal distortion
- Grade coverage spans carbon, structural, line-pipe, pile, and stainless families including A312 TP304, TP316 and A789
- DIN EN 10219 S275 and S355 grades supplied to European structural callouts
- API 5L PSL1 grades B through X70 available, with PSL2 available via HFW process
- Sanitary and process grades A270, A269, A312 and A790 supplied for food, pharma and chemical service
- Precision dimensional control in round, square and rectangle sections to meet structural and process fit-up requirements
Grades Standards And Size Range
Values below come from the published product data. Anything not listed is confirmed per enquiry.
| ASTM structural tubing | A500 Grade B and C |
|---|---|
| ASTM line pipe | A134, A135 |
| DIN EN structural pipe | EN 10219 S275, S355 |
| ASTM stainless pipe | A269, A270, A312, A790 |
| API 5L line pipe | PSL1 grades B to X70, PSL2 via HFW process |
| API 5CT casing and tubing | J55, K55, N80 |
| Sections | Round, square, rectangle |
| Galvanizing | Available on A53 Grade A and B |
| Surface finish | Smooth internal and external surfaces, weld seam flush and consistent |
| Wall thickness range | TBC |
| Outside diameter range | TBC |
Materials
- Carbon steel for general structural, conveyance and low-pressure service in A53 and A252 families
- Structural carbon steel A500 for load-bearing frames and bracing
- Austenitic stainless steel TP304, TP304L, TP316 and TP316L for corrosion resistance in process and sanitary service
- Ferritic and duplex stainless in A790 for chloride and high-temperature environments
- Galvanized carbon steel for outdoor and corrosive service where coating extends life
Manufacturing Route
Quality Control
- Chemical composition and mechanical property checks against the ordered specification
- In-house laboratory holding CNAS certification carries out the routine testing
- Third-party inspection can be booked before shipment on buyer request
- Mill certificates issued against the grade and standard stated on the purchase order
Customisation Options
- Grade and standard selected per line item, so one order can mix ASTM, API, DIN and EN callouts
- Cut lengths and section shape specified at order stage
- OEM service accepted
- Packing and marking arranged to suit the destination port and inspection regime
- Galvanizing available on A53 Grade A and B upon request
How It Compares With The Alternatives
| Seamless steel pipe | ERW is cheaper and available in larger diameters; seamless is preferred for high-pressure, sour, or cryogenic service where a weld line is unacceptable |
|---|---|
| Spiral SSAW pipe | Spiral is better for large-diameter, thick-wall applications; ERW wins on smaller diameters and where consistent wall thickness is critical |
| HFW line pipe | HFW is used for API 5L PSL2; ERW is standard for PSL1 and lower-grade line pipe, with lower cost and faster delivery |
Buying Guide
- Start from the code the project is stamped to, then pick the grade family before the size
- For structural use confirm whether A500 Grade B or C is required for load capacity
- For oil and gas transmission, state whether PSL1 or PSL2 is needed, as PSL2 requires HFW process
- For sanitary or process service, specify the grade and finish (e.g. A270, A312) to ensure compliance
- Send the size table with the enquiry, because grade availability varies by outside diameter and wall thickness
Questions About ERW Steel Pipe
Which standards can you supply ERW pipe against?
ASTM A53, A252, A500, A134, A135, A269, A270, A312, A790, API 5L PSL1 and PSL2 (via HFW), API 5CT, and DIN EN 10219 S275 and S355.
Can one order mix grades and standards?
Yes. Mixed-standard scope on one purchase order is the normal case here, which is why buyers consolidate pipe, plate and coil with us rather than splitting across mills.
Do you supply square and rectangular sections?
Yes. Round, square and rectangle sections are all available.
Is galvanizing available?
Yes. Galvanizing is available on ASTM A53 Grade A and B pipe.
What certification backs the material?
The company holds ISO 9001, API Q1, PED, CE, API 5L, 5CT and 5DP, with an in-house CNAS-certified laboratory. Mill certificates are issued against the ordered specification.
Can we appoint our own inspector?
Yes. Third-party inspection is available on request and is best booked at order stage so the production schedule allows for it.
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Get ERW Steel Pipe Quoted
Send the grade, size and quantity. Availability, price and lead time come back per line item.