LSAW steel pipe is widely used for large-diameter pipelines, oil and gas transportation, water transmission, structural projects and other industrial applications where pipe diameter, wall thickness and weld quality are critical.
The key points buyers need to confirm before ordering LSAW steel pipe: common standards and grades, size and wall thickness, inspection requirements, LSAW vs. SSAW, and how to evaluate an LSAW pipe supplier.
It is written for stock distributors, trading companies and engineering contractors sourcing LSAW pipe for industrial and pipeline projects.
What Is LSAW Steel Pipe?
LSAW stands for Longitudinal Submerged Arc Welded Steel Pipe.
LSAW pipe is manufactured from steel plate. The plate is formed into a cylindrical shape and welded along the longitudinal seam using submerged arc welding. Common forming methods include JCOE and UOE.
Because of its large diameter and thick-wall capability, LSAW pipe is commonly used for:
- Oil and gas pipelines
- Water transmission
- Water treatment and desalination
- Mining projects
- Structural and piling applications
- Petrochemical and industrial projects
LSAW Steel Pipe Specifications
When requesting an LSAW pipe quotation, buyers should provide the complete specification rather than only the pipe diameter.
| Item | Typical Requirement |
|---|---|
| Pipe Type | LSAW / Longitudinal SAW |
| Outside Diameter | 406 mm and above, depending on production capability |
| Wall Thickness | According to project requirement |
| Steel Grade | API 5L Grade B, X42, X52, X60, X65, X70, etc. |
| Standard | API 5L, ISO 3183 or project specification |
| Length | Random or fixed length |
| End | Plain or beveled |
| Testing | Hydrostatic / UT / RT as required |
| Coating | Bare / 3PE / FBE / other |
| Documents | MTC / EN 10204 3.1 or project requirement |
JS FITTINGS currently lists 406–1570 mm OD and 8–40 mm wall thickness for its LSAW steel pipe range.
The final dimensions and tolerances should always be confirmed against the applicable standard and purchase specification.
Common LSAW Steel Pipe Standards
API 5L and ISO 3183
API 5L and ISO 3183 are commonly specified for oil and gas pipeline applications.
Common grades include:
- Grade B
- X42
- X52
- X60
- X65
- X70
For API 5L pipe, buyers should also confirm the required PSL level, chemical composition, mechanical properties, impact testing and NDT requirements.
Do not specify only “API 5L X52” if the project specification also requires a particular PSL or supplementary testing.
ASTM Standards
ASTM standards cover different applications and should not be treated as interchangeable.
For example:
- ASTM A252 — commonly used for steel pipe piles.
- ASTM A671 — covers electric-fusion-welded steel pipe made from pressure-vessel-quality plate for atmospheric and lower-temperature service.
Always select the standard according to the actual application and project specification.
LSAW vs. SSAW vs. ERW
| Pipe Type | Weld Configuration | Typical Applications |
|---|---|---|
| LSAW | Longitudinal seam | Large-diameter pipelines, water, oil & gas |
| SSAW | Spiral seam | Water, piling, infrastructure |
| ERW | Longitudinal electric weld | Small and medium-diameter industrial piping |
The choice should be based on diameter, wall thickness, pressure, steel grade, applicable standard and project requirements, rather than price alone.
More differences between LSAW VS SSAW Vs ERW Pipe, please click here.
How to Choose LSAW Steel Pipe Supplier?
Before placing a large order, check these points.
1. Confirm the Actual Production Range
Make sure the supplier can manufacture your required:
- Diameter
- Wall thickness
- Steel grade
- Pipe length
A supplier listing LSAW pipe does not necessarily mean it can produce every specification.
2. Check Quality and Traceability
Ask for relevant:
- Material certificates
- Chemical analysis
- Mechanical test results
- Hydrostatic test records
- NDT reports
- Dimensional inspection records
For project orders, pipe marking and documentation should be traceable to the supplied material.
3. Confirm NDT Requirements
Depending on the project, requirements may include:
- Ultrasonic testing
- Radiographic testing
- Weld inspection
- Hydrostatic testing
- Third-party inspection
Always confirm the inspection method, coverage and applicable standard before production.
4. Check Coating and Export Capability
For buried pipelines and other applications requiring corrosion protection, suppliers may offer 3PE, FBE or other specified coatings.
Also confirm export packing, marking, documentation and shipping arrangements before placing the order.
5. Look Beyond the Lowest Price
For distributors and project contractors, consistent quality and delivery are often more important than a one-time low price.
Check whether the supplier can maintain consistent:
Grade → Size → Testing → Documentation → Packing → Delivery
across repeat orders.
LSAW Steel Pipe FAQ
What does LSAW stand for?
LSAW means Longitudinal Submerged Arc Welded Steel Pipe.
What is the difference between LSAW and SSAW pipe?
LSAW has a longitudinal straight weld seam, while SSAW has a spiral weld seam. LSAW is commonly used for large-diameter industrial and pipeline applications.
What is the common LSAW pipe size range?
The available range depends on the manufacturer’s equipment. JS Steel Pipes currently lists 406–1570 mm OD and 8–40 mm wall thickness for its LSAW pipe range.
Is LSAW pipe suitable for oil and gas pipelines?
Yes. LSAW pipe is widely used in large-diameter pipeline projects. API 5L and ISO 3183 may be specified depending on the project.
What API 5L grades are commonly used?
Common grades include Grade B, X42, X52, X60, X65 and X70, subject to production capability and project requirements.
Can LSAW pipe be supplied with 3PE coating?
Yes. LSAW pipe can be supplied with 3PE, FBE or other specified anti-corrosion coatings.
What information do I need to request a quotation?
Provide the OD, wall thickness, grade, standard, length, quantity, end preparation, coating, testing requirements and destination.
The more complete the RFQ, the more accurate the quotation will be.
LSAW Steel Pipe Supplier for Industrial Orders
JS FITTINGS, a steel pipe supply brand of Hebei Jinsheng Pipe Fitting Manufacturing Co., Ltd., supplies industrial steel pipes for overseas distributors, trading companies and engineering contractors.
The company operates a 35,000+ sqm production base with 100+ team members, with a stated capacity of 90+ containers per month. Products are supplied for industrial applications with export documentation and inspection support.
For an LSAW steel pipe quotation, send us your:
Pipe Size + Wall Thickness + Grade + Standard + Quantity + Destination
Email: info@jssteelpipes.com
WhatsApp: +86 180 0311 9682
