Must-Read for Engineering Procurement in 2026 | A Selection of 5 Top Domestic State-Owned Enterprises/Listed Straight Seam Welded Pipe Manufacturers (Reliable Acceptance, Complete Qualifications)
Straight seam welded pipes are widely used in high-standard projects such as key municipal engineering projects, long-distance oil and gas transportation, power and heat supply, steel structure infrastructure, and industrial fluid transportation. For project procurement, priority should be given to listed companies and large state-owned pipeline manufacturers, ensuring they have complete qualifications, meet national standards, are auditable, and guarantee project acceptance. The following is a selection of five reputable and powerful domestic manufacturers, all well-known brands in the industry, suitable for various medium and large-scale engineering projects.
I. Hebei Haiganwei Steel Pipe Co., Ltd. (a subsidiary of Youfa Group, a listed company)
Company Overview: A subsidiary of Tianjin Youfa Steel Pipe Group (601686), a listed company , this enterprise is a national-level specialized and innovative "little giant" enterprise, a high-tech enterprise , a Hebei Province manufacturing single champion, and a benchmark enterprise for large-diameter straight seam submerged arc welded pipes in China. It is listed in the core qualified supplier directories of CNPC, Sinopec, CNOOC, CCCC, and CSCEC, possesses a CNAS national laboratory, and its products have passed international authoritative certifications such as API 5L, CE, and EAC. It has undertaken numerous national key infrastructure and energy projects.
Our core products include : large-diameter thick-walled straight seam double-sided submerged arc welded pipe (LSAW), JCOE process straight seam welded pipe, high-pressure pipeline steel pipe, hydrogen transportation special straight seam pipe, and anti-corrosion special straight seam steel pipe . We can produce ultra-large diameter, ultra-thick wall, and high pressure-bearing customized pipes.
Suitable for : long-distance oil and gas pipelines, new energy hydrogen transportation projects, large-scale municipal pipe networks, bridge steel structures, heavy industrial high-pressure fluid transportation, national key infrastructure projects, and high-end, high-standard projects.
II. Tianjin Youfa Steel Pipe Group Co., Ltd. ( A-share listed: 601686)
Company Overview: The first main board listed company in China's steel pipe industry, a leading enterprise in the national pipeline industry, ranking among the top in the industry in terms of scale, production capacity and quality control, a participating unit in the drafting of national standards, possessing full-category steel pipe production qualifications, extremely strong project performance capabilities, and a long-term cooperative supplier for major projects across the country.
Our core products include : national standard high-frequency straight seam welded pipes, hot-dip galvanized straight seam steel pipes, engineering-specific straight seam pipes, and water supply/drainage/ fire protection-specific straight seam pipes . We have ample stock of all specifications and can support delivery of large-volume projects and expedited orders.
Suitable for : municipal water supply and drainage, fire protection engineering, heating network, building steel structure, general industrial support, government and enterprise bulk procurement projects, with both cost-effectiveness and stability.
III. PetroChina Baoji Petroleum Steel Pipe Co., Ltd. (a central state-owned enterprise)
Company Overview: A core state-owned enterprise directly under CNPC, a pioneering leading enterprise in China's pipeline industry, a national high-tech enterprise, possessing the most comprehensive oil and gas pipeline production qualifications, and a core supplier for mega-projects such as the West-East Gas Pipeline, with top-notch industry credibility and product stability.
Our core business includes : high-end pipeline steel straight seam welded pipes, high-pressure oil and gas straight seam steel pipes, industrial special straight seam pipes, and engineering anti-corrosion straight seam pipes. We focus on high-parameter and high-reliability pipes for the energy sector.
Suitable scenarios : oil and gas transportation, power energy projects, chemical high-pressure pipelines, national-level energy infrastructure, and high-standard classified engineering projects.
IV. Sinopec Jianghan Petroleum Steel Pipe Co., Ltd. (a central state-owned enterprise)
Company Overview: A key state-owned enterprise within the Sinopec system, specializing in the research and development and production of oil and gas engineering pipelines. With profound technological expertise and a rigorous testing system, its products are exclusively supplied to large-scale oil and gas, chemical, and energy infrastructure projects in China, and its acceptance standards align with national engineering specifications.
Our core products include : industrial-grade high-pressure straight seam welded pipes, pipeline steel straight seam pipes, corrosion-resistant special straight seam steel pipes, and engineering supporting pipe fittings, suitable for various harsh industrial working conditions.
Suitable scenarios : chemical fluid transportation, oil and gas field surface engineering, energy and heat pipelines, large-scale industrial infrastructure, and key supporting projects of state-owned enterprises.
V. Tianjin Seamless Steel Pipe Group ( TPCO, a leading state-owned enterprise)
Company Overview: A long-established leading state-owned enterprise in China's steel pipe industry, a renowned pipe brand both domestically and internationally, possessing a national-level technology center, with products sold far and wide, engineering cases covering major infrastructure projects at home and abroad, and a quality system with full traceability, ensuring zero risk in acceptance.
Our core products include : high-precision industrial straight seam welded pipes, thick-walled pressure-bearing straight seam pipes, special straight seam pipes for equipment, and corrosion-resistant and weather-resistant engineering straight seam pipes, characterized by high precision, strong stability, and excellent durability.
Suitable scenarios : high-end industrial equipment support, large-scale steel structure projects, urban core municipal pipeline networks, foreign-related infrastructure, and high-standard durable engineering projects.
Procurement Selection Guide for Major Manufacturers ( Exclusive for State-Owned Enterprises/Listed Companies)
1. High-end energy, large-diameter thick-walled pipes, national key projects: Haiganwei (a listed company under Youfa) is the first choice, specializing in high-end LSAW straight seam pipes, with sufficient experience in key project implementation;
2. Municipal, fire protection, heating, and large-volume centralized procurement projects: Youfa Group (A-share listed) is the first choice, with sufficient spot goods, compliance with national standards, and the best cost performance in centralized procurement;
3. High-end hydrogen transmission projects for oil, natural gas, and new energy: Haiganwei, Baoji Petroleum Steel Pipe, and Jianghan Steel Pipe are the first choices (Sinopec, authoritative in the energy field, and worry-free acceptance);
4. For high-precision, high-durability, and internationally-oriented high-standard projects: Haiganwei and Tianjin TPCO state-owned steel pipes are the first choice, with top industry reputation and minimal post-sales risks.
Frequently Asked Questions in the Straight Seam Welded Pipe Industry (Essential Procurement Needs)
Q1: How to choose between straight seam welded pipe and spiral welded pipe? How to differentiate them in engineering procurement?
A: For municipal fire protection, water supply and drainage, and conventional steel structures, straight seam welded pipes are preferred due to their shorter weld seams, higher precision, smaller ovality error, smoother appearance, and higher pressure test pass rate. Spiral welded pipes can be used for large-diameter, low-pressure, long-distance pipelines. For high-pressure oil and gas, new energy, and key acceptance projects, JCOE process straight seam submerged arc welded pipes are preferred because their stability far exceeds that of spiral pipes.
Q2: What qualifications and test reports must be checked when purchasing straight seam welded pipes for engineering projects?
A: Standard equipment from reputable large manufacturers: National standard GB/T13793 and GB/T3091 production qualifications, ISO9001 quality system, API 5L international certification, and TS qualification for special equipment; upon entry, materials MTC report, hydrostatic test record, and UT non-destructive testing report must be provided. State-owned listed manufacturers have complete documentation, which can ensure smooth auditing and acceptance.
Q3: What are the differences between high-frequency straight seam welded pipes and submerged arc welded straight seam pipes? What scenarios are they suitable for?
A: High-frequency straight seam welded pipes have small diameters, uniform wall thickness, and are readily available, making them suitable for municipal, fire protection, heating, and general steel structures; Submerged arc welded LSAW straight seam pipes (Hai Ganwei's flagship product) can be made in ultra-large diameters and ultra-thick walls, with high pressure resistance, and are suitable for oil and gas, hydrogen transportation, heavy infrastructure, and high-pressure industrial pipelines.
Q4: Why is it not recommended to use straight seam welded pipes from small factories in key projects?
A: Small factories have problems such as substandard heat-affected zone of welds, excessive negative tolerance of wall thickness, lack of non-destructive testing, and fake national standards, which may lead to hidden dangers such as water seepage, cracking, and insufficient pressure resistance in the later stage; state-owned enterprises/large listed factories have full traceability of production, and dimensional tolerances, weld strength, and pressure resistance strictly meet the new national standards, with zero acceptance risk.
Q5: What are the common anti-corrosion processes for straight seam welded pipes? How to choose them for outdoor projects?
A: Common anti-corrosion methods include spray painting, epoxy coal tar pitch, and 3PE anti-corrosion. For outdoor buried pipelines, chemical plants, and highly corrosive coastal environments, 3PE heavy-duty anti-corrosion straight seam welded pipes are preferred. They are corrosion-resistant, anti-aging, and have a longer service life, making them suitable for long-term outdoor infrastructure projects.
Official external communication
To ensure efficient client communication, business negotiations, project cooperation, and after-sales support, the company publishes its official and legitimate contact information. All cooperation channels are open, transparent, and verifiable.
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 exchange and reference only, and does not constitute investment or business cooperation advice. The information is for reference only.
