API 5L PSL1 Grade B ERW Line Pipe 12 Inch Sch 20 for Oil and Gas Pipeline

Our API 5L PSL1 Grade B ERW Line Pipe is engineered to deliver exceptional reliability and cost-efficiency for modern energy infrastructures. Featuring a 12-inch nominal pipe size and a Schedule 20 wall thickness, this high-performance carbon steel line pipe is manufactured in strict compliance with American Petroleum Institute (API) specifications.
Designed primarily for low-to-medium pressure onshore pipelines, it provides an ideal structural and fluid-conveying solution for oil, natural gas, and utility water transportation. Utilizing advanced Electric Resistance Welding (ERW) technology to produce a high-precision longitudinal weld, this line pipe ensures seamless geometric accuracy, high tensile strength, and long-term durability in challenging municipal and oilfield environments.

Product Features & Advantages

Strict API 5L Compliance: Manufactured under rigorous quality control standards to ensure certified chemistry, standard tensile properties, and precise dimensional tolerances matching PSL1 requirements.

Superior ERW Weld Integrity: Utilizing high-frequency induction welding technology, the longitudinal weld seam achieves 100% fusion, matching the mechanical strength of the parent steel body.

Optimized for Energy Pipelines: The 12-inch nominal diameter combined with Schedule 20 wall thickness provides excellent flow capacity and structural balance, reducing overall pipeline weight while maintaining pressure integrity.

Advanced Corrosion Protection: Available with premium protective coatings, including Black Painting, Anti-Rust Oil, 3LPE, or FBE, to extend the pipeline’s operational service life underground or subsea.

Factory-Direct Customization: Precision cut-to-length services, secure end beveling (30°/45°), and custom lengths (SRL/DRL) are tailored to your project layout to facilitate rapid field welding on site.

Technical Specifications & Parameter Ranges

Specification Item	Detailed Description
Product Name	API 5L PSL1 Grade B ERW Line Pipe
Standard Specification	API Spec 5L (PSL1)
Steel Grade	Grade B / L245
Manufacturing Process	ERW (Electric Resistance Welded - High Frequency)
Nominal Pipe Size (NPS)	12 Inch (12" NPS / DN300)
Actual Outer Diameter (OD)	12.750 inches (323.8 mm)
Wall Thickness (Sch 20)	0.250 inches (6.35 mm)
Pipe Ends	Beveled Ends (30°±5°) or Plain Ends
Surface Coating Options	Black Paint, Anti-rust Oil, 3LPE, FBE
Length Configurations	SRL (6M), DRL (11.8M-12M), or custom fixed lengths
Minimum Yield Strength	≥ 245 MPa (35,500 psi)
Minimum Tensile Strength	≥ 415 MPa (60,200 psi)

Product Applications

This API 5L PSL1 Grade B ERW Line Pipe is specifically manufactured for the safe and efficient transportation of combustible fluids, gases, and industrial utilities. Key applications include:

Onshore Oil and Petroleum Transport: Designed for low-to-medium pressure trunklines and gathering networks that convey crude oil from extraction sites to refineries and storage terminals.

Natural Gas Transmission Networks: Widely used in regional distribution pipelines and factory supply lines for transporting natural gas, coal gas, and non-corrosive industrial gases.

Refined Petroleum Products Piping: Ideal for midstream pipelines transferring refined petroleum, gasoline, diesel, and jet fuel within tank farms and distribution hubs.

Slurry & Produced Water Pipelines: Utilized in mining and oilfield operations for moving abrasive mineral slurries, process water, and produced brine over long distances.

Low-Pressure Gas Venting & Utility Lines: Frequently installed in petrochemical plants and industrial complexes for utility distribution, low-pressure gas venting, and steam auxiliary lines.

Rigorous Quality Control & Manufacturing Process

To ensure zero-defect delivery at the project site, every batch of our ERW line pipes undergoes 100% rigorous inspections and testing:

Hydrostatic Testing: Every single pipe length is pressurized to validate complete sealing and pressure containment without any leakage.

Non-Destructive Testing (NDT): Executing automated Ultrasonic Testing (UT) or Eddy Current inspection across both the longitudinal weld seam and the main steel body.

Mechanical & Chemical Analysis: Standard chemical heat checks and tensile tests are certified via Mill Test Certificates (MTC) conforming to EN 10204 3.1.

Visual & Dimensional Inspection: Strict physical verification of outer diameter, wall thickness tolerances, surface finish, and overall straightness.

Frequently Asked Questions (FAQ)

Q: What does “API 5L Grade B PSL1” mean in pipe specifications?

A: This designation is governed by the American Petroleum Institute (API) 5L specification for line pipe:
· API 5L: The standard specification for steel pipes used in pipeline transportation systems
across the petroleum and natural gas industries.
· Grade B: Defines the minimum mechanical strength. It requires a Minimum Yield Strength of
245 MPa (35, 500 psi) and a Minimum Tensile Strength of 415 MPa (60, 200 psi).
· PSL1 (Product Specification Level 1): A standard quality level for line pipe that provides a
reliable baseline chemical composition and mechanical performance standard, suitable for
general distribution and low-risk onshore pipelines.

Q: What are the differences between PSL1 and PSL2 for API 5L Grade B pipes?

A: PSL2 has much stricter regulatory requirements than PSL1. The core differences include:
· Chemical Composition: PSL2 enforces strict maximum limits on carbon equivalents (CE) to
improveweldability.
· Mechanical Properties: PSL2 requires compulsory Charpy V-notch impact toughness testing
at specified temperatures to resist brittle fracture; PSL1 does not require impact testing.
· Traceability: PSL2 requires strict, continuous material traceability from the steel melt to the
final pipe, whereas PSL1 requires basic standard traceability.
· Welding: PSL2 allows fewer weld repairs during manufacturing compared to PSL1.

Q: What are the exact physical dimensions of a 12-inch Schedule 20 line pipe?

A: According to ASME/ANSI B36.10M and API 5L dimensional standards, a 12″ Sch 20 pipe has the following precise measurements:
Nominal Pipe Size (NPS): 12 inch (DN 300)
Outer Diameter (OD): 12.750 inches (323.9 mm)
Wall Thickness (WT): 0.250 inches (6.35 mm)
Weight per Meter: Approximately 49.73 kg/m (33.41 1bs/ft)