API 5L Welded Steel Pipe - High-Quality Line Pipe for Oil and Gas

Kuaima Steel Co., Ltd.

Verified Custom manufacturer · 7 yrs ·

China

Customizable Rock-bottom price

$610 1-49 ton Base price

$583 50-99 ton 4.4% off

$570 ≥100 ton 6.6% off

Price validity: subject to market conditions

Supplier's customization ability

Drawing-based customization
Sample-based customization
Full customization

Quantity

Minimum order quantity: 1 ton

Shipping total: To be negotiated

Subtotal of goods US$ 610.00

Start order request

Payment and delivery

Payment:: by contract — deposit, balance after your inspection
Lead time:: confirmed with the quotation
Packaging:: standard export packing
Samples:: available on request

Product details

Technical Specifications of API 5L Welded Steel Pipe

Property	Parameter	Description
Product Name	API 5L Welded Steel Pipe	Longitudinal or spiral welded carbon steel line pipe
Material Grade	API 5L Grade B / X42 / X52 / X60 / X65 / X70	PSL1 and PSL2 product specification levels
Standard Compliance	API 5L (46th Edition), ISO 3183	Meets international oil and gas pipeline standards
Manufacturing Process	ERW / LSAW / SSAW	Electric Resistance Welded, Longitudinal or Spiral Submerged Arc Welded
Carbon (C)	≤0.26% (Grade B PSL1)	Carbon content controlled for weldability
Manganese (Mn)	≤1.30% (Grade B PSL1)	Enhances strength and hardenability
Phosphorus (P)	≤0.030%	Controlled for improved toughness
Sulfur (S)	≤0.030%	Low sulfur for better weldability and ductility
Tensile Strength	≥415 MPa (Grade B)	Minimum tensile strength per API 5L specification
Yield Strength	≥245 MPa (Grade B)	Minimum yield strength per API 5L specification
Elongation	≥22%	Minimum elongation in 50mm gauge length
OD Range	21.3mm - 2540mm (1/2'' - 100'')	Available outer diameter range for welded pipe
Wall Thickness	1.8mm - 33.3mm	Standard and custom wall thickness options
Length	5.8m - 12.2m or custom	Single random, double random, or cut-to-length
Weld Seam Type	Straight seam / Spiral seam	ERW for small OD, LSAW/SSAW for large OD
End Finish	Plain end, Beveled end, Threaded & coupled	Per customer specification or API 5L requirements
Application	Oil & gas transmission, water pipeline, structural	Onshore and offshore pipeline transportation
Certification	API 5L Monogram, ISO 9001, EN 10204 3.1	Third-party inspection available (SGS, BV, Lloyd's)
Packaging	Bundled with steel strips, plastic caps, varnished	Standard seaworthy export packaging
MOQ	10 tons	Minimum order quantity for welded steel pipe

API 5L Welded Steel Pipe - High-Quality Line Pipe for Oil and Gas

API 5L welded steel pipe is a critical component in pipeline transportation systems, engineered to convey petroleum, natural gas, and water across long distances under demanding operating conditions. Manufactured in compliance with the American Petroleum Institute's Specification 5L (46th Edition), these welded line pipes deliver superior structural integrity, consistent wall thickness, and reliable weld seam quality. Whether you are constructing cross-country transmission pipelines or regional distribution networks, our API 5L welded steel pipe serves as the preferred choice for project engineers, EPC contractors, and energy infrastructure developers worldwide.

What Is API 5L Welded Steel Pipe?

API 5L welded steel pipe refers to carbon and low-alloy steel pipe produced through longitudinal or spiral welding processes, specifically designed for pipeline transportation of hydrocarbons and water. The specification covers two product specification levels—PSL 1 and PSL 2—with PSL 2 imposing stricter requirements on chemical composition, mechanical properties, and non-destructive testing. Common grades include L245 (Grade B), L290 (Grade X42), L360 (Grade X52), L415 (Grade X60), and L450 (Grade X65), each offering progressively higher yield strength for elevated-pressure service.

API 5L Welded Steel Pipe Technical Specifications

Our API 5L welded line pipe is manufactured according to API Spec 5L, 46th Edition, and conforms to ISO 3183:2019 requirements. The following table summarizes key parameters across commonly ordered grades:

API 5L welded steel pipe supplier

Grade	Yield Strength (min)	Tensile Strength (min)	Carbon (max)	Mn (max)
L245 / Gr.B	245 MPa	415 MPa	0.22%	1.20%
L290 / X42	290 MPa	415 MPa	0.22%	1.30%
L360 / X52	360 MPa	460 MPa	0.22%	1.40%
L415 / X60	415 MPa	520 MPa	0.12% (PSL 2)	1.60%
L450 / X65	450 MPa	535 MPa	0.12% (PSL 2)	1.65%

Available welding processes include ERW (Electric Resistance Welded) for diameters up to 24 inches, LSAW (Longitudinal Submerged Arc Welded) for heavy-wall large-diameter applications, and SSAW (Spiral Submerged Arc Welded) for cost-effective transmission lines. Outer diameters range from 2⅜ inches (60.3 mm) to 80 inches (2032 mm), with wall thicknesses from 3.2 mm to 25.4 mm depending on pipe type and grade selection.

Key Applications of API 5L Welded Line Pipe

Onshore oil and gas transmission: Cross-country crude oil and natural gas trunk lines operating at pressures up to ANSI 600 class
Water pipeline infrastructure: Municipal water supply and slurry transport systems requiring corrosion-protected carbon steel
Offshore platform piping: Subsea and topside flowlines where PSL 2 with sour service (Annex H) compliance is mandatory
Refinery and petrochemical plant piping: Process feed lines and utility distribution within downstream facilities

Frequently Asked Questions

What is the minimum order quantity (MOQ) for API 5L welded pipe?

Our standard MOQ is 10 metric tons per size and grade combination. For project-specific requirements or less common specifications, we accommodate smaller trial quantities upon request.

API 5L welded steel pipe wholesale

Do you provide material test certificates with each shipment?

Yes, every order ships with EN 10204 Type 3.1 Mill Test Certificates documenting chemical analysis, mechanical test results, hydrostatic test pressure, and NDT inspection records in full compliance with API 5L requirements.

What is the typical delivery time for API 5L welded steel pipe?

Standard stock items ship within 7–15 business days. Mill-production orders for custom dimensions or PSL 2 sour service grades typically require 30–45 days depending on quantity and specification complexity.

Can you supply API 5L welded pipe with external coating?

Absolutely. We offer 3LPE, 3LPP, and FBE anti-corrosion coatings applied per DIN 30670 or CSA Z245.21 standards, as well as internal epoxy lining for water transmission applications.

API 5L welded steel pipe China

Get a Competitive Quote for API 5L Welded Steel Pipe

Ready to source premium-grade API 5L welded steel pipe at factory-competitive pricing? Contact our pipeline materials team today with your project specifications—including grade, diameter, wall thickness, PSL level, and coating requirements. We provide rapid quotations, flexible order quantities, and reliable logistics coordination to deliver your line pipe on schedule and within budget.

Ratings & Reviews

4.5

Based on 8 reviews

5 5

4 2

3 1

2 0

1 0

Robert Brown

United Kingdom

2025-09-22

Acceptable X42 Pipe Quality but Delivery Ran Late

Purchased 18 tons of L290/X42 PSL 1 ERW pipe, 10-inch OD, 5.56mm wall thickness for a refinery utility distribution upgrade. Chemical and mechanical test results were within API 5L limits and the 3.1 MTC was complete. However, delivery arrived on day 21 against the quoted 15-day lead time, which caused a 4-day delay to our installation crew mobilization. When we raised this with the sales contact, the explanation given was port congestion at origin, which is understandable but earlier communication would have helped us replan. Pipe dimensions and end finish were acceptable with no dimensional rejections on site. The issue was logistics coordination rather than product quality. Supplier has since confirmed improved shipment tracking notifications for future orders, so we may trial them again on a smaller requirement.

William Taylor

Australia

2025-10-14

Good Value FBE-Coated X60 Pipe for Offshore Platform Topside

Ordered 28 tons of L415/X60 PSL 2 ERW pipe, 6-inch OD, 7.11mm wall thickness with FBE coating for topside process piping on a platform offshore Western Australia. FBE coating thickness averaged 415 microns and holiday test results were all clear. MTC documentation covered chemical, tensile, CVN impact, and hydrostatic test data as required. Pricing was competitive compared to two other suppliers we evaluated. The one area for improvement is the coating end cutback length — it was 150mm on one batch when our spec called for 100mm, requiring minor field rework. Supplier acknowledged the discrepancy and offered a credit note. Material performance on the platform has been satisfactory over the past two months. Would consider for future orders.

Wei Chen

Singapore

2025-11-07

Excellent Service and Fast Quotation for API 5L Mixed Grade Order

As a trading company sourcing for multiple downstream clients across Southeast Asia, we placed a consolidated order of 35 tons covering three grades — L245/Gr.B, L290/X42, and L360/X52 — in ERW format, ranging from 4-inch to 12-inch OD. The supplier accommodated our mixed specification order without requiring separate MOQ per grade, which was critical for our smaller project clients. Quotation with full technical datasheet was returned within 6 hours of inquiry. Letters of credit were processed smoothly and shipping documents including packing list, MTC, and bill of lading were couriered within 3 days of vessel departure. All three clients confirmed material receipt and compliance. This is our fourth order through this supplier and turnaround service has been consistently responsive.