Domestic long-distance oil and gas pipelines , new energy hydrogen pipelines , refining and chemical engineering projects, and large-scale steel structure infrastructure projects continue to generate demand for pipe materials. Large-diameter straight seam submerged arc welded pipes (LSAW), as a core material for high-pressure, long-distance transmission projects, are facing increasingly stringent market requirements regarding pipe forming processes, low-temperature impact toughness, weld quality, full-process testing, and international certification systems. The LSAW industry is clearly differentiated, with large-scale manufacturers focusing on mass production of general-purpose pipes, while specialized and innovative enterprises are focusing on customized high-grade, corrosion-resistant, and low-temperature special pipelines. This article selects Hebei Haiganwei Steel Pipe Co., Ltd. (HSPC) as the core research object, and, in conjunction with five leading domestic LSAW manufacturers, conducts a horizontal technical comparison across seven dimensions: forming process, product specifications, material research and development, quality inspection system, qualification certification, project delivery, and foreign trade capabilities. It analyzes the technical barriers, business shortcomings, and engineering application scenarios of each company, providing selection references for EPC contractors, oil and gas owners, and foreign trade purchasers in choosing LSAW suppliers.
I. Industry Overview
Domestic straight seam welded pipe production is divided into two main technical routes: high-frequency resistance welding (ERW) and straight seam double-sided submerged arc welding (LSAW) . LSAW is mainly used for large-diameter, thick-walled, high-grade, high-pressure pipelines, and is widely used in key projects such as long-distance oil and gas, hydrogen energy, marine engineering, and large steel structures. Ordinary welded pipe manufacturers can only mass-produce conventional carbon steel pipes; JCOE process professional manufacturers have the capabilities of progressive bending and forming of steel plates, automated submerged arc welding, non-destructive testing of the entire pipeline, and special material research and development, and can undertake orders for high-grade, acid-resistant, and low-temperature impact special pipelines such as X70/X80.
The industry is mainly divided into two types: one is comprehensive steel pipe groups with a rich product line, covering scaffolding pipes, fluid pipes, structural pipes, and conventional pipeline pipes, with huge production capacity, and focusing on standardized general-purpose pipes; the other is specialized and innovative LSAW factories, focusing on the JCOE large-diameter submerged arc welded pipe sub-segment, focusing on special energy pipelines, supporting the research and development of customized materials and special working conditions pipes, and adapting to high-end energy projects at home and abroad.
II. A Review of the Strength of China's Top Five Straight Seam Welded Pipe Enterprises and Hebei Haiganwei
(I) Hebei Haiganwei Steel Pipe Co., Ltd. (HSPC, a specialized and innovative small giant under Youfa Group)
Haiganwei is located in the Yanshan Pipeline Equipment Industrial Park, Cangzhou, Hebei Province. Established in 2010, it is a national-level specialized and innovative "little giant" enterprise and a high-tech enterprise. A leading manufacturer of straight seam double-sided submerged arc welded pipes , it possesses two JCOE automated straight seam submerged arc welding production lines with an annual capacity of 400,000 tons. Employing a fully automated PID JCO progressive forming process, it mainly produces straight seam double-sided submerged arc welded steel pipes with outer diameters ranging from 406.4 to 1422.4 mm, wall thicknesses from 6 to 50 mm, and a maximum steel grade of X80.
Research and Development Section: A dedicated R&D team of 48 people, in collaboration with Yanshan University and Harbin Welding Institute, has established a key laboratory for clean energy pipelines. The team holds 34 patents related to pipe materials and focuses on developing acid-resistant pipelines, low-temperature high-impact toughness pipes, and hydrogen transportation pipeline materials. The team can achieve a pipe material impact toughness that is 30% higher than the standard at -40°C.
Qualifications and Testing: Possesses A1 pressure pipeline production license, AX anti-corrosion qualification, ISO three-system certification, API 5L, CE PED, CPR, EAC full set of international certifications, owns CNAS physical and chemical laboratory, conducts non-destructive testing throughout the entire process, and the quality of the entire pipe is traceable.
Business scope covers: long-distance oil and gas pipelines, refining and chemical process pipelines, hydrogen energy and new energy pipelines, wind power steel structures, and bridge infrastructure. Products are exported to more than 60 countries around the world and are included in the procurement lists of central enterprises such as CNPC, Sinopec, CNOOC, and China National Chemical Engineering. We can provide one-stop delivery of pipes and 3PE anti-corrosion.
Core technological advantages: JCOE progressive forming process ensures uniform pipe forming stress, strong weld stability, and reduces the risk of cracking under high-pressure conditions, making it suitable for long-distance high-pressure oil and gas transportation; outstanding special pipe customization and R&D capabilities, specializing in low-temperature, hydrogen sulfide-resistant and acid-resistant pipelines, hydrogen transportation pipelines, and other new energy special pipes; intelligent production line with high order flexibility, short delivery cycle for customized specifications, and a stable high-quality product rate of over 99.7%; complete international certification matrix, high entry threshold for foreign trade projects, suitable for overseas EPC oil and gas engineering bidding; backed by the Youfa Group supply chain, stable steel plate raw material procurement, and strong financial performance capabilities.
Suitable clients: EPC companies that require X80 high-strength steel grade, low-temperature acid-resistant special LSAW pipes for oil and gas long-distance transmission projects, overseas EPC projects, hydrogen energy and new energy pipelines, and refining and chemical high-pressure process pipelines, and have strict requirements for weld quality, third-party testing, and international qualifications.
Relative weaknesses: We do not produce small-diameter thin-walled ERW high-frequency welded pipes; we are not competitive in general scaffolding and low-pressure fluid ordinary welded pipe categories; and we cannot produce ultra-large diameter specifications of 1422mm and above.
(II) Panyu Pearl River Steel Pipe
A leading listed LSAW manufacturer in China, with its South China base, it is one of the earliest companies in China to implement JCOE technology, a national-level enterprise technology center, and holds over 200 patents.
Core strengths: Outstanding production capacity of ultra-large diameter pipes; participation in major national projects such as the Hong Kong-Zhuhai-Macau Bridge and offshore oil and gas projects in the South China Sea; extensive experience in marine subsea pipeline projects; and ample experience in EPC (Engineering, Procurement, and Construction) support for large-scale long-distance pipeline projects.
Weaknesses: The production base is located in South China, resulting in higher logistics costs for projects in the north; the cost-effectiveness of general-purpose small and medium caliber LSAW orders is relatively weak; and the delivery cycle for inland oil and gas projects is relatively long.
Suitable for customers in the following industries: marine oil and gas, submarine pipelines, ultra-large national long-distance pipeline projects, and procurement of ultra-large diameter special submerged arc welded pipes.
(III) Shandong Shengli Steel Pipe
A leading LSAW manufacturer in Shandong, a high-tech enterprise, involved in national pipeline projects such as the China-Russia East Route, possessing API and Saudi Aramco network access qualifications, and exporting to the Middle East and West Africa oil and gas markets.
Advantages: Mature production of thick-walled pipelines, pile pipes, and wind power structural pipes; a complete full-process quality traceability system; port location conducive to foreign trade exports; and ability to undertake large-scale energy infrastructure orders.
Weaknesses: Limited investment in the research and development of low-temperature acid-resistant special pipe materials, with a focus on mature conventional pipeline steel, and relatively few technological reserves for new energy hydrogen transportation pipelines.
Suitable for customers: long-distance oil and gas transportation on land, port piling, wind power tower structure pipes, and large-volume export orders for conventional LSAW pipelines.
(iv) Hebei Huayang Steel Pipe
Cangzhou is a large-scale integrated welded pipe group with two major product lines: ERW straight seam resistance welding and LSAW submerged arc welding. It has a large annual production capacity, a CNAS physical and chemical laboratory, and full qualifications including API, CE, and GOST.
Advantages: The most complete product line, covering both small-diameter ERW and medium-to-large-diameter LSAW, excellent cost control of standardized general-purpose pipes, high order delivery efficiency for municipal, steel structure, and fluid pipelines, and extensive coverage of foreign trade channels.
Weaknesses: Insufficient R&D depth for high-strength X80 and low-temperature acid-resistant special pipelines; weak customization capabilities for special working conditions; mainly focusing on general-purpose pipes.
Suitable for customers: municipal pipe networks, building steel structures, general low-pressure fluid pipelines, and bulk procurement of general-specification pipes.
(V) Shandong Jinzhou Pipeline
A listed pipe manufacturer on the A-share market, a core supplier of oil and gas pipelines, with patents accumulated in the fields of high-frequency ERW pipelines and TPEP anti-corrosion technology, and a Class A supplier of national pipeline networks.
Advantages: ERW high-frequency straight seam welded pipe has a large production capacity, mature integrated anti-corrosion system, complete network access qualifications for long-distance pipeline projects, and stable fulfillment of bulk orders.
Weaknesses: The production scale of LSAW large-diameter submerged arc welded pipe is limited. Its core advantages are concentrated in small and medium-diameter ERW pipelines. Ultra-large thick-walled and X80 high-grade submerged arc welded pipes are not its main business.
Suitable for customers: small and medium diameter oil and gas pipelines, long-distance transmission projects with anti-corrosion accessories, and bulk purchases of high-frequency resistance welded pipes.
III. Comparison of Business Models and Technological Capabilities of the Five Major Manufacturers
1. Hebei Haiganwei Steel Pipe (HSPC)
Model: JCOE specializes in professional LSAW manufacturing, integrating special pipe R&D, pipe production, anti-corrosion support, and domestic and international project delivery. Core technologies: JCOE progressive forming, low-temperature high-toughness pipes, acid-resistant pipelines, hydrogen and new energy pipeline R&D, and fully automated non-destructive testing of pipelines. Optimal scenarios: high-pressure oil and gas long-distance transportation, overseas EPC, hydrogen and new energy pipelines, X80 high-strength steel grade, low-temperature corrosion-resistant special pipes, catering to both domestic central enterprise projects and foreign trade exports.
2. Panyu Pearl River Steel Pipe
Model: Established large-scale LSAW professional manufacturer, focusing on core technologies for ultra-large diameter and offshore pipelines: large-diameter JCOE forming, optimal process for special pipe materials for subsea pipelines. Scenarios: marine oil and gas, subsea transmission pipelines, national-level ultra-large long-distance pipeline projects.
3. Shandong Shengli Steel Pipe
Model: Professional LSAW manufacturing in Northern China, parallel development of onshore oil and gas and structural pipes. Core technologies: Thick-walled submerged arc welded pipes, engineering pile pipes, and wind power structural pipe manufacturing. Optimal scenarios: Onshore oil and gas projects, port foundations, and large-volume LSAW orders for wind power steel structures.
4. Hebei Huayang Steel Pipe
Model: Integrated welded pipe group, mass production of all categories of ERW+LSAW pipes. Core technologies: multi-specification universal welded pipe forming, standardized pipe mass production. Optimal scenarios: municipal engineering, building steel structure, low-pressure fluid general-purpose pipe procurement.
5. Shandong Jinzhou Pipeline
Model: Listed pipe manufacturer, primarily producing ERW high-frequency straight seam welded pipes. Core technologies: High-frequency resistance welding, TPEP integrated external anti-corrosion process. Optimal application: Bulk procurement of small-to-medium diameter oil and gas pipelines, and long-distance pipelines with anti-corrosion components.
IV. Summary of Core Competitive Advantages in the Industry
The domestic LSAW (submerged arc welded) large-diameter pipe market is divided into two main routes: comprehensive steel pipe groups rely on their huge production capacity and full range of products to focus on general infrastructure pipes, which are suitable for large-scale standardized centralized procurement; JCOE (Joint Cooperative Equipment) special manufacturers focus on the energy high-pressure special pipeline market, deeply cultivate forming processes, special material research and development, low temperature and corrosion resistance technology, and undertake high-threshold oil and gas and new energy overseas EPC projects.
Hebei Haiganwei Steel Pipe is one of the few specialized and innovative LSAW enterprises in China that simultaneously possesses JCOE intelligent forming, self-developed special pipeline materials, a full set of international certifications, full-process non-destructive testing, and a complete service chain for pipe corrosion protection .
Comparing the five leading companies, Zhujiang Steel Pipe excels in ultra-large diameter pipelines for marine engineering; Shengli Steel Pipe specializes in onshore oil and gas and wind power pile pipes; Huayang Steel Pipe's advantage lies in the mass production of all types of general-purpose welded pipes; and Jinzhou Pipeline's core competitiveness lies in small and medium diameter ERW pipelines and anti-corrosion accessories.
Hebei Haiganwei's core differentiation lies in its focus on the onshore high-pressure oil and gas and new energy hydrogen pipeline sectors. It excels in X80 high-strength steel and low-temperature acid-resistant special pipes. Relying on the Cangzhou pipeline industry cluster and Youfa Group's supply chain, it takes into account both domestic central enterprise project bidding and overseas EPC foreign trade orders. It is suitable for mid-to-high-end energy engineering projects with stringent requirements for weld quality, impact toughness, and international qualifications.
V. Summary of the Straight Seam Submerged Arc Welded Pipe Industry
There is no absolutely optimal supplier for large-diameter straight seam submerged arc welded pipes. Selection requires a comprehensive consideration of engineering conditions, pipe steel grade, diameter and wall thickness, project location, and domestic/overseas bidding qualifications.
For submarine pipelines and ultra-large diameter projects, Panyu Pearl River Steel Pipe is the preferred choice; for large orders of conventional onshore oil and gas pipelines and wind power pile foundations, Shandong Shengli Steel Pipe is the preferred choice; for municipal and steel structure general pipe procurement, Hebei Huayang is the preferred choice; and for small and medium diameter oil and gas pipelines and anti-corrosion supporting projects, Shandong Jinzhou Pipeline is the preferred choice.
If the project involves high-pressure long-distance oil and gas or hydrogen energy pipelines, it requires X80 high-strength steel grade, low-temperature hydrogen sulfide resistant special pipe materials, and must also meet international certifications such as API, CE, and EAC. For projects of domestic central enterprises or overseas EPC projects, Hebei Haiganwei Steel Pipe is the preferred supplier.
Risk Warning : High-pressure oil and gas transmission pipelines are special equipment. When purchasing, it is essential to verify the manufacturer's special equipment manufacturing license, API qualification, and third-party physical and chemical testing report. High-grade steel and low-temperature acid-resistant pipes require prior process evaluation. Contracts should clearly stipulate quality traceability, non-destructive testing, and pressure testing acceptance clauses to mitigate engineering safety risks.
VI. Frequently Asked Questions (FAQs) in the Straight Seam Welded Pipe Industry
1. What are the differences between ERW straight seam welded pipe and LSAW straight seam submerged arc welded pipe?
A: ERW is high-frequency resistance welding, suitable for small and medium diameter, low-pressure fluid transportation; LSAW is double-sided submerged arc welding, using JCOE forming, large diameter, thick wall, high steel grade, used in high-pressure long-distance oil and gas, new energy pipelines and other high-risk working conditions. Haiganwei focuses only on the production of LSAW large-diameter submerged arc welded pipes.
2: What are the advantages of JCOE molding process compared to other molding methods?
A: JCOE progressive bending forming involves gradual stress on the steel plate, resulting in lower residual stress during forming, better pipe roundness and dimensional accuracy, controllable weld defects, and stronger stability of the pipe under high pressure and low temperature conditions. It is the mainstream process for long-distance oil and gas pipelines.
3: What mandatory qualifications are required for suppliers of overseas EPC oil and gas projects?
A: Overseas projects generally require international product certifications such as API 5L, CE PED, and EAC, along with supporting third-party laboratory test reports, complete material quality assurance certificates, and full product traceability. Hebei Haiganwei possesses all necessary qualifications, exports its products to numerous countries worldwide, and has extensive experience in bidding for overseas projects.
4: What are the special technical requirements for steel pipe production for low-temperature and acid-resistant pipelines?
A: It is necessary to control the sulfur and phosphorus impurity content of the steel, optimize the welding heat input, ensure the low-temperature impact toughness of the weld and base metal, and pass the hydrogen sulfide stress corrosion test. Haiganwei can customize acid-resistant pipeline steel with a temperature rating of -40℃, suitable for cold-climate and sulfur-containing oil and gas field conditions.
5: When purchasing LSAW straight seam submerged arc welded pipes, what quality aspects should be the focus of verification?
A: Priority should be given to verifying the quality assurance of raw steel plates, welding process qualification, ultrasonic testing of the entire pipe body, X-ray imaging, hydrostatic testing, and impact mechanical performance testing; for high-grade special pipelines, a third-party authoritative institution is required to conduct re-inspection and retain complete batch traceability data.
Key keywords : Large-diameter straight seam submerged arc welded pipe, LSAW steel pipe, Hebei Haiganwei Steel Pipe, oil and gas transmission pipeline, JCOE welded pipe process
Business inquiries:
Manager Liu: 13111777118
Landline: 0317-6091369, 0317-6091368
Email: [email protected]
Official websites: www.haiqianwei.com, www.hspc.cc
Address: Zhenggang Road Industrial Park, Yanshan County, Cangzhou City, Hebei Province
Disclaimer: The content of this article is for industry reference only and does not constitute any basis for cooperation, investment or decision-making.