Hebei Huayang Steel Pipe Co., Ltd is one of the most experienced manufacturers and suppliers of project grade lsaw steel pipe api 2b in China. Welcome to buy discount project grade lsaw steel pipe api 2b made in China here from our factory. Quality products and low price are available.
Product introduction
Product Description
Project Grade LSAW Steel Pipe API 2B is a heavy‑duty longitudinal submerged‑arc welded steel pipe manufactured strictly to API 2B standard, specially engineered for large‑scale industrial projects, municipal infrastructure, water conservancy, offshore construction, port engineering and heavy‑load buried pipeline systems. Produced from high‑grade carbon steel plates with JCOE forming and double‑sided submerged‑arc welding (LSAW), this project‑grade pipe features high structural stability, excellent pressure‑bearing performance, strict dimensional precision, superior weld integrity and strong environmental adaptability. Designed for long‑term heavy‑load, complex‑condition engineering service, it is widely used in large‑diameter fluid transmission, structural support pipelines, foundation engineering and industrial trunk‑line projects worldwide, delivering reliable, durable and standard‑compliant pipeline solutions for global engineering construction.
Basic Product Specifications
Product Name: Project Grade LSAW Steel Pipe API 2B
Executive Standard: API 2B, compatible with GB/T 9711, ISO 3183
Manufacturing Process: LSAW (Longitudinal Submerged Arc Welding), JCOE cold forming, edge milling, double‑sided SAW welding, cold expansion, weld normalization, stress‑relieved heat treatment
Steel Grade: API 2B, Q355B, X46, X52 (project‑grade matched grades)
Outer Diameter (OD): 323.9 mm – 1626 mm, customizable
Wall Thickness (WT): 8 mm – 45 mm, custom thick‑wall up to 60 mm for heavy‑load project service
Standard Length: 12 m (standard), 6 m / 9 m optional, custom fixed lengths up to 18 m
Delivery Condition: Normalized + stress‑relieved (project‑grade standard for long‑term stability)
Surface Finish: Black bare steel with anti‑rust oil; 3PE / FBE / coal tar epoxy anti‑corrosion coating for buried/offshore use
Pipe End: 30°‑45° beveled ends for field welding; plain ends / flanged ends optional
Application: Municipal comprehensive pipe galleries, industrial heavy‑load process pipelines, water conservancy diversion projects, offshore engineering auxiliary pipelines, port and bridge support pipelines, large‑scale foundation engineering pipelines
Grade & Process Explanation
API 2B Project‑Grade Performance: API 2B is a widely recognized structural steel pipe standard for heavy‑duty engineering projects, featuring stable chemical composition, high yield strength, excellent weldability and impact toughness. Strict low‑sulfur & low‑phosphorus control improves resistance to soil corrosion, seawater erosion and long‑term fatigue damage, fully meeting heavy‑load structural and pressure‑bearing requirements for large engineering projects.
LSAW Process Advantages for Project Grade: Single‑plate JCOE forming ensures uniform wall thickness and high roundness for large‑diameter thick‑wall pipes. Double‑sided full‑penetration submerged‑arc welding guarantees weld mechanical properties consistent with base metal, low defect rate and high structural safety. Cold expansion and post‑weld stress‑relieved treatment eliminate residual stress, resisting long‑term ground load, temperature change and construction‑induced stress, core for project‑grade long‑service‑life performance.
Project‑Oriented Special Design: Optimized for harsh engineering working conditions including buried heavy load, offshore salt corrosion and cold‑region low temperature. Strict dimensional tolerance ensures precise connection with engineering flanges, valves and supports. Professional anti‑corrosion systems adapt to complex underground and marine environments, extending service life over 30 years for permanent engineering infrastructure.
Dimensional Tolerance (API 2B 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 (API 2B Reference)
|
Property |
Standard Requirement |
|
Minimum Yield Strength |
≥245 MPa |
|
Tensile Strength |
415 – 655 MPa |
|
Elongation |
≥21% |
|
Hydrostatic Test |
100% tested at 1.5× working pressure, no leakage or permanent deformation |
|
Charpy Impact |
≥27 J at 0 °C, optional ≥20 J at −20 °C for cold‑region projects |
|
Flattening / Bend Test |
No cracks, weld separation or structural defects |
Chemical Composition (Max. %, API 2B)
|
Element |
C |
Mn |
P |
S |
Si |
|
API 2B |
≤0.26 |
≤1.40 |
≤0.035 |
≤0.035 |
≤0.45 |
Residual elements: Cu ≤0.50%, Ni ≤0.30%, Cr ≤0.30%, Mo ≤0.15%. Strict impurity control prevents stress corrosion and fatigue cracking in heavy‑load engineering service.
Manufacturing Process
Raw Material Inspection: High‑quality API 2B grade steel plates strictly tested for chemical composition and mechanical properties.
Plate Edge Milling & Pre‑Bending: Precision edge processing and pre‑bending to ensure forming quality for large‑diameter project pipes.
JCOE Cold Forming: Multi‑step stamping forming for uniform wall thickness and high roundness.
Double‑sided LSAW Welding: Full‑penetration internal‑external welding + weld normalization; 100% online UT inspection.
Cold Expansion: Optimize circularity and relieve residual stress for heavy‑load stability.
Stress‑Relieved Heat Treatment: Standard process for project‑grade long‑term anti‑fatigue performance.
NDT Inspection: 100% UT + RT for weld seams, meeting API 2B high‑safety requirements.
Hydrostatic Test: Full‑line pressure testing per API 2B standard.
Finishing: End beveling, anti‑rust treatment, marking, anti‑corrosion coating optional.
Product Advantages
API 2B Standard‑Compliant Project Grade: Fully meets international engineering structural pipe standards, accepted by global project owners and third‑party inspectors.
Heavy‑Load Structural Performance: Thick‑wall LSAW structure and stress‑relieved treatment resist long‑term ground load, offshore pressure and construction stress.
Ultra‑Stable Weld Quality: Double‑sided full‑penetration welding with low defect rate, ideal for permanent engineering infrastructure.
High‑Precision Dimensional Control: Strict tolerance ensures perfect assembly with engineering fittings, improving construction efficiency.
Multi‑Environment Adaptability: Customizable anti‑corrosion coatings adapt to buried, coastal, cold‑region and industrial environments.
Complete Quality Traceability: Heat number tracking, MTR reports, SGS/BV third‑party inspection available for project acceptance.
Main Applications
Large‑scale municipal infrastructure and comprehensive pipe gallery projects
Industrial heavy‑load process and high‑pressure transmission pipelines
Water conservancy diversion, reservoir and hydraulic engineering pipelines
Offshore engineering, port and coastal construction auxiliary pipelines
Bridge support, foundation engineering and heavy‑load buried pipelines
Global EPC large‑scale engineering permanent pipeline systems
Quality Inspection & Certification
Full dimensional inspection of OD, wall thickness, length, straightness and roundness
Tensile, flattening, bend, hydrostatic and mandatory Charpy impact tests
100% UT + RT weld inspection for project‑grade high‑safety level
Heat‑batch chemical composition analysis per API 2B
API‑standard Mill Test Report (MTR), third‑party inspection available
Packaging & Delivery
Packaging: Bundled with heavy‑duty steel strips, wrapped in waterproof woven cloth, steel end caps for pipe‑end protection
Marking: API 2B, LSAW, Project Grade, OD×WT, steel grade, heat number, batch number
Trade Terms: FOB, CIF, CFR, DAP available
Shipping Ports: Tianjin, Qingdao, Shanghai, Ningbo
Customization: Custom wall thickness, anti‑corrosion coating, length and pipe‑end forms supported
Contact Us
For quotation, stock availability, delivery schedule and customized technical solutions of Project Grade LSAW Steel Pipe API 2B, please contact our sales team. We provide API‑compliant project‑grade LSAW steel pipes and professional engineering‑oriented technical support for your global heavy‑load infrastructure 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.
Certifications
API 2B
API 5L
GOST
ISO 9001
EN 10219
EN 10210
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