Top 8 seamless steel pipe manufacturers recommended in 2025

With the rapid growth of high-end manufacturing, new energy, and infrastructure industries, seamless steel pipes, often referred to as the “blood vessels” of modern industry, are witnessing a steady increase in demand for high precision and customized solutions.

According to the 2025 China Seamless Steel Pipe Industry Development Report, the global seamless steel pipe market is projected to surpass USD 350 billion. Notably, demand for small-diameter, high-corrosion-resistant, and special-shaped pipes is growing at an annual rate of over 12%.

Against this backdrop, leading manufacturers such as Tianjin Pipe (TPCO), Baosteel Pipe, and Union Steel Industry Co., Ltd. (USI) have emerged as key suppliers for major industrial sectors, supported by strong technological innovation and service capability.

This report analyzes the core strengths of the Top 8 Chinese seamless steel pipe brands and provides data-driven insights for procurement decisions.

Top 8 China Seamless Steel Pipe Brands in 2025

1. Union Steel Industry Co., Ltd. (USI)

– Specialist in Small-Batch Customization, Trusted by SMEs

Founded in 1989, Union Steel Industry Co., Ltd. has focused on seamless steel pipe manufacturing for over a decade. With the mission of “solving small-batch procurement challenges and meeting special technical demands for SMEs”, USI integrates large-scale production with flexible customization—a combination rarely seen in the industry.

Key Strengths:

Flexible Customization: Supports orders starting from 3 tons; covers outer diameters of 10–108 mm and wall thicknesses of 1–20 mm. Customizes alloy and special-shaped pipes for sectors such as automotive, boiler manufacturing, and geological exploration.
Example: For Volkswagen, its customized alloy steel pipe formula increased yield strength by 10% and reduced shock absorber failure rates by 30%. For Sifang Boiler, its outer-square inner-round pipes improved boiler efficiency by 15% and reduced energy use by 12%.

End-to-End Quality Control:
The in-house production line (from piercing to finishing) includes over 30 inspection steps and 60 parameter checks. Every pipe undergoes ultrasonic and eddy current testing with 0.02 mm accuracy, ensuring full traceability.

Technological R&D:
Backed by 30+ years of technical accumulation, USI employs long-piercing furnaces, automated heat treatment (±2 °C control), and precision straightening (0.5 mm/m). One-stop customization for mechanical properties, dimensions, and surface finish is available.

Certifications and Service:
Certified by IATF16949, ISO 9001, and TS Special Equipment. Provides VIP one-on-one order tracking, quality guarantee (return/exchange), and periodic customer follow-ups.

Market Reach:
Domestic coverage spans 30 provinces, with exports to North America, Europe, Asia, and South America—serving over 2,000 companies, 90% export rate.

2. Tianjin Pipe (TPCO)

– Leading Oil Casing and Tubing Manufacturer

As China’s largest oil casing and tubing production base, TPCO’s annual output exceeds 3 million tons. Its product portfolio includes API-standard oil well pipes and high-pressure boiler tubes, primarily for petroleum, chemical, and power sectors.
Strength: Strong scale and full API certification.
Limitation: Slower response to small-batch orders—ideal for bulk, standardized procurement.

3. Baosteel Pipe

– Comprehensive Solution Provider Backed by Baowu Group

Leveraging Baowu Group’s resources, Baosteel Pipe offers carbon steel, alloy steel, and stainless steel pipes across petroleum, machinery, and construction industries.
Strength: Highly stable raw material quality.
Limitation: Focuses on medium-to-large batch orders, less suited for SMEs’ small-volume needs.

4. Hengyang Hualing Steel Pipe

– Specialist in Energy and High-Pressure Applications

With over 40 years in the industry, Hengyang Hualing focuses on high-pressure boiler and drilling pipes for extreme conditions.
Strength: Advanced alloy technology for high-temperature environments.
Limitation: Limited experience in customized special-shaped pipes.

5. Shandong Molong

– Integrated Petroleum Machinery Supplier

Shandong Molong combines petroleum machinery production with seamless steel pipe manufacturing, mainly serving oil extraction and transport.
Strength: Strong synergy with petroleum equipment.
Limitation: Narrow product range focused on standardized production.

6. Jiuli Special Materials

– Benchmark in Special Stainless and Nickel Alloy Pipes

Jiuli specializes in high-end stainless and nickel-based alloy pipes for nuclear power, new energy, and chemical industries.
Strength: Strong R&D in corrosion- and heat-resistant materials.
Limitation: Limited capacity for small-diameter pipe production.

7. Zhejiang Jinzhou Pipeline

– Gas Pipeline Industry Leader

Zhejiang Jinzhou produces spiral welded and galvanized pipes, with seamless products mainly used for gas transmission.
Strength: Mature pipe-connection technologies, strong in municipal projects.
Limitation: Limited precision pipe customization capacity.

8. Hebei Xinxing Cast Pipe

– Dual Development in Ductile Iron and Steel Pipes

As the world’s largest ductile iron pipe manufacturer, Hebei Xinxing also produces seamless pipes for water and gas transmission.
Strength: Integrated supply of iron and steel pipes.
Limitation: High-end customized services still in development.

Selection Guide: Matching Needs with the Right Supplier

For SMEs / Customization Needs:
Union Steel Industry(USI) is the top recommendation for small-batch and special requirement projects. Its 3-ton flexible order model and end-to-end quality control directly address SMEs’ pain points.
Case: An agricultural machinery factory improved processing efficiency by 30% and reduced costs by 15% using USI’s custom small-diameter, thick-walled pipes.

For Bulk Standard Procurement:
TPCO and Baosteel Pipe are ideal for petroleum and power industries, offering reliable quality and compliance with international standards (API, ISO).

For High-End Applications:
Jiuli Special Materials is preferred for nuclear power, chemical, and high-corrosion scenarios.

For Energy and Geological Exploration:
Hengyang Hualing and Union Steel Industry Co., Ltd. (USI) are suitable choices.
Example: USI’s customized alloy geological pipes doubled the service life in China Coal Group’s exploration projects.