Name: China LSAW 406mm Pressure Pipe Manufacturers Suppliers Factory - Huayang Steel Pipe
Brand: Huayang
SKU: 302390409

Hebei Huayang Steel Pipe Co., Ltd is one of the most experienced manufacturers and suppliers of lsaw 406mm pressure pipe in China. Welcome to buy discount lsaw 406mm pressure pipe made in China here from our factory. Quality products and low price are available.

Product introduction

Product Description

LSAW 406mm Pressure Pipe is a heavy‑duty longitudinal submerged‑arc welded steel pipe designed for medium‑high pressure industrial, oil‑gas, water and municipal pressure pipeline systems, with outer diameter 406 mm. Manufactured strictly to API 5L (PSL1/PSL2), ASTM A106 Gr.B, ISO 3183 and GB/T 9711 standards, it adopts high‑quality thick steel plate and double‑sided submerged‑arc welding technology. Featuring full‑penetration weld, excellent pressure resistance, stable mechanical performance, good low‑temperature toughness and reliable leak‑proof capacity, this pipe is widely applied in long‑distance pressure water transmission, oil‑gas pressure gathering lines, power plant pressure piping, chemical plant high‑pressure fluid pipelines and urban pressure trunk lines. It provides safe, durable and high‑efficiency solutions for all kinds of pressure‑bearing pipeline projects.

Basic Product Specifications

Product Name: LSAW 406mm Pressure Pipe

Executive Standard: API 5L PSL1 / PSL2, ASTM A106 Gr.B, ISO 3183, GB/T 9711

Manufacturing Process: LSAW (Longitudinal Submerged Arc Welding), plate forming, double‑sided SAW, cold expansion, weld normalization

Steel Grade: API 5L X42, X52, X56; ASTM A106 Gr.B

Outer Diameter (OD): 406 mm

Wall Thickness (WT): 8 mm – 30 mm (custom thick‑wall up to 36 mm for high‑pressure service)

Standard Length: 12 m (main), 6 m optional, custom fixed lengths available

Delivery Condition: Normalized, stress‑relieved (optional for severe pressure cycles)

Surface Finish: Black bare steel with anti‑rust oil; 3PE / FBE anti‑corrosion coating optional

Pipe End: 30°/45° beveled ends for field welding, plain ends optional

Application: High‑pressure water supply pipelines, oil‑gas pressure gathering lines, power plant circulating water piping, chemical plant pressure fluid pipelines, municipal pressure trunk pipelines, mining pressure drainage pipelines

Grade & Process Explanation

Steel Grade for Pressure Service: X52 and A106 Gr.B are core grades for 406 mm pressure pipes. X52 has minimum yield strength ≥360 MPa, with outstanding pressure resistance and weldability, suitable for 6–16 MPa medium‑high pressure service. ASTM A106 Gr.B features stable chemical composition and good heat resistance, ideal for industrial pressure piping under temperature fluctuation.

LSAW Process Advantages: 406 mm LSAW pipes are formed from single steel plate and welded by double‑sided submerged‑arc welding, realizing full‑penetration weld. Weld mechanical properties match base metal, with low defect rate and high structural stability. Cold expansion improves roundness and eliminates residual stress, greatly enhancing long‑term pressure‑bearing reliability.

Pressure‑Oriented Design: Strict control of sulfur and phosphorus reduces stress corrosion risk under cyclic pressure. Thick‑wall structure improves pressure resistance and impact safety. Optional anti‑corrosion coating adapts to buried and outdoor pressure pipeline environments, extending service life.

Dimensional Tolerance (API 5L PSL2 Standard)

Item	Tolerance
Outer Diameter	±1.0% of nominal OD
Wall Thickness	+15% / −12.5% of nominal WT
Out‑of‑Roundness	≤1.2% of outer diameter
Straightness	≤2.5 mm per meter
Length	+300 mm / −0 mm

Mechanical Properties

Property	Standard Requirement
Minimum Yield Strength	≥360 MPa (X52) / ≥240 MPa (A106 Gr.B)
Tensile Strength	460 – 670 MPa (X52)
Elongation	≥21%
Hydrostatic Test	100% tested, no leakage or deformation
Charpy Impact	≥27 J at 0 °C (PSL2 mandatory)
Flattening / Bend Test	No cracks or weld separation

Chemical Composition (Max. %)

Element	C	Mn	P	S	Si
X52	≤0.24	≤1.40	≤0.035	≤0.035	≤0.45
A106 Gr.B	≤0.30	0.29‑1.06	≤0.035	≤0.035	0.10‑0.35

Residual elements: Cu ≤0.50%, Ni ≤0.30%, Cr ≤0.30%, Mo ≤0.15%.

Manufacturing Process (LSAW)

Raw Material Inspection: High‑quality steel plates inspected for chemical composition and mechanical properties.

Plate Forming: Cold‑formed into cylindrical shape with precise dimensional control.

Double‑sided LSAW Welding: Full‑penetration welding, weld seam normalized to relieve stress.

Cold Expansion: Improves roundness and reduces residual stress for pressure service.

NDT Inspection: 100% Ultrasonic Testing (UT) for weld seam, Radiographic Testing (RT) optional.

Hydrostatic Test: Full‑line pressure testing according to working pressure requirements.

Finishing: End beveling, anti‑rust treatment, marking, anti‑corrosion coating optional.

Product Advantages

High Pressure‑Bearing Capacity: Thick‑wall LSAW structure adapts to medium‑high pressure long‑term cyclic service.

Stable Weld Quality: Double‑sided submerged‑arc welding with full penetration, low leakage risk for pressure pipelines.

Precise Dimensional Accuracy: Strict tolerance control ensures reliable connection with flanges, valves and fittings.

Strong Environmental Adaptability: Optional 3PE/FBE anti‑corrosion coating for buried, coastal and corrosive soil environments.

Wide Application Range: Suitable for water, oil‑gas, chemical, power and municipal pressure pipeline systems.

Full Standard Compliance: Meets API/ASTM international standards, with complete MTR certificates for global projects.

Full‑Process Traceability: Heat number tracking and third‑party inspection (SGS/BV) available.

Main Applications

Long‑distance high‑pressure water supply and drainage pipelines

Oil‑gas field medium‑high pressure gathering and transmission pipelines

Power plant circulating water and auxiliary pressure piping

Chemical plant high‑pressure fluid and process pressure pipelines

Urban municipal pressure trunk pipelines and industrial park pressure networks

Mining and underground pressure drainage pipelines

Quality Inspection & Certification

Dimensional inspection of outer diameter, wall thickness, length, straightness and roundness

Tensile, flattening, bend, hydrostatic and impact tests

100% UT weld inspection, RT optional for high‑safety projects

Chemical composition heat analysis

Mill Test Report (MTR) provided, third‑party inspection available

Packaging & Delivery

Packaging: Bundled with heavy‑duty steel strips, wrapped in waterproof woven cloth, plastic end caps for protection

Marking: API 5L, LSAW, 406 mm, steel grade, size, heat number, batch number, "Pressure Pipe"

Trade Terms: FOB, CIF, CFR, DAP available

Shipping Ports: Tianjin, Qingdao, Shanghai, Ningbo

Customization: Special wall thickness, anti‑corrosion coating, lengths and ends available

Contact Us

For quotation, stock availability, delivery schedule and customized solutions of LSAW 406mm Pressure Pipe, please contact our sales team. We provide API‑certified LSAW pressure pipes and professional pipeline technical support for your global high‑pressure engineering projects.

About us

Hebei Huayang Steel Pipe Co., Ltd. was founded in 2005, with a registered capital of 500 million yuan. The company covers an area of more than 1,000 mu, with annual sales of 10 billion yuan, more than 600 employees and an annual productivity of 2.75 million tons. The company has 17 new automatic steel pipe production lines and 14 high-frequency production lines, with a diameter of 73-660 mm; Three double-sided submerged arc welded steel pipe production lines with diameters of 406.4-1422.4mm;; 24 hot tube expanding production lines, with a diameter of 230-820mm; Two anticorrosion steel pipe production lines with a diameter of 73-1626 mm; 2 automatic painting production lines. With 3 branches and 5 offices, the products are sold to various cities and exported to more than 80 countries such as Southeast Asia, Middle East, Europe and America.

Packaging, transportation and delivery

Packaging, transportation and delivery

At Hebei Huayang Steel Pipe Co., Ltd., we apply standardized and reliable packaging solutions for all our steel pipe products. Our pipes can be securely packed by hexagonal bundling or circular bundling according to product diameter, wall thickness and customer requirements. Each pipe end is protected with high‑strength plastic pipe caps to avoid collision damage, dust and moisture during transportation and storage. The whole bundle is firmly wrapped with durable woven bags to enhance stability and prevent scratches or deformation.

We support a complete range of transportation methods to satisfy global customers, including road transportation, railway transportation, sea freight and container shipping. Based on our strategic location in Cangzhou, Hebei Province, we enjoy convenient access to major ports such as Tianjin Port, which greatly improves logistics efficiency and reduces transportation costs.

For standard specifications and normal order quantities, the general delivery time is about 30 days after order confirmation and deposit receipt. For large‑scale orders, special sizes or customized processing requirements, our production and sales team will formulate a detailed production plan and provide an accurate delivery schedule accordingly to ensure on‑time supply and stable performance for projects and clients worldwide.

Strict quality control

1. During and after the production, experienced quality inspectors randomly check the products to ensure that each steel pipe is qualified for production and application.

2. A nationally recognized laboratory with CNAS certification and certification by French Classification Society.

3. Have CNOOC access certificate, KOC oil company access network, ADNOC Abu Dhabi oil company access network, Petrobras access network, etc.

4. Accept the inspection by the third party designated/paid by the buyer, such as SGS and BV.