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Steel manufacturing facility

United Steel Industry – Global Leader in Steel Tubular Solutions

Premium manufacturer of seamless, welded, stainless, and coated steel pipes for Oil & Gas, Offshore, Construction, and Water Supply industries. ISO-certified, API-compliant, and built for performance.

Trusted Steel Pipe Manufacturer Since 2016

United Steel Industry Co., Ltd. is a professional manufacturer and exporter of steel pipes and tubular products based in Suzhou, China. With advanced production lines and strict quality control, we deliver high-performance steel solutions to over 60 countries worldwide.

Our products meet international standards including API 5L, ASTM, ASME, GB, and ISO. We specialize in seamless, welded, stainless, alloy, and coated steel pipes for critical applications in Oil & Gas, Offshore, Construction, and Infrastructure.

60+
Countries Served
15+
Years Experience
Factory interior Steel pipe production Quality inspection Warehouse storage

Our Main Products

Comprehensive range of steel pipes and tubular products engineered for durability, precision, and compliance with global standards.

Seamless Steel Pipe

  • OD: 13.72–914.4mm
  • WT: 1.25–50mm
  • Length: 5.8–12m
  • API 5L, ASTM A106, A53

ERW Steel Pipe

  • OD: 21.3–660mm
  • WT: 1–20mm
  • Length: 5.8–12m
  • High-frequency welded

LSAW Steel Pipe

  • OD: 406–1626mm
  • WT: 6–60mm
  • Length: 5.8–12m
  • Longitudinal submerged arc

SSAW Steel Pipe

  • Spiral submerged arc
  • Large diameter options
  • High strength & durability
  • Oil & gas transmission

API Casing Pipe

  • OD: 114.3–508mm
  • WT: 5.21–22.22mm
  • R1/R2/R3 Lengths
  • API 5CT Certified

API Tubing

  • OD: 40–115mm
  • WT: 3–16mm
  • Oil & gas extraction
  • Corrosion resistant

3PE Coated Pipe

  • Triple-layer polyethylene
  • Anti-corrosion protection
  • Buried pipeline use
  • Long service life

Stainless Steel Pipe

  • OD: 18–610mm
  • WT: 1.6–40mm
  • 304, 316, 321, 904L
  • Seamless & welded

Alloy Steel Pipe

  • High-temperature resistant
  • Boiler & heat exchanger
  • ASTM A213, A335
  • Seamless & welded

Galvanized Steel Pipe

  • Hot-dip & pre-galvanized
  • Zinc-coated for rust protection
  • Construction & scaffolding
  • Long-lasting durability

Pipe Fittings & Flanges

  • Elbow, Tee, Reducer, Cap
  • Carbon & stainless steel
  • ANSI, DIN, JIS standards
  • Welded & threaded

Structural Steel Sections

  • H-Section, Square & Rectangular
  • Construction & infrastructure
  • High load-bearing capacity
  • Custom sizes available

Comprehensive Support Services

From logistics to inspection, we ensure seamless delivery and quality assurance for every order.

Global Logistics

Door-to-door shipping with tracking and customs support.

Quality Inspection

Third-party and in-house testing for compliance.

Warehousing

Two modern warehouses for fast dispatch.

Sales Support

Dedicated team for technical and commercial queries.

Project Management

End-to-end coordination for large-scale projects.

Global Project Experience

Trusted by leading energy and infrastructure companies across continents.

Indonesia offshore project

Indonesia Offshore Engineering

Supply of LSAW and SSAW pipes for offshore platform construction and subsea pipelines.

Peru petroleum project

Peru Petroleum Pipeline

API 5L X65 seamless and welded pipes for onshore oil transportation network.

Venezuela oil project

Venezuela Oil Transportation

Large-diameter coated pipes for crude oil pipeline expansion project.

Frequently Asked Questions

What standards do your pipes meet?

Our products comply with API 5L, API 5CT, ASTM A106, A53, A213, A335, ASME, GB, and ISO standards.

Do you offer custom sizes and coatings?

Yes, we provide custom OD, WT, length, and coating options including FBE, 3PE, and concrete.

What is your production capacity?

We have an annual production capacity of over 500,000 tons across multiple advanced manufacturing lines.

How do you ensure quality control?

We conduct 100% ultrasonic, hydrostatic, and dimensional testing, along with third-party inspections upon request.

Get in Touch

Contact our sales team for inquiries, quotes, or technical support. We respond within 24 hours.

Phone: 0086 731 8564 8266
Email: Sales@united-steel.com
Email: info@united-steel.com
Address: N0.405, Suzhou East Road, Suzhou Industrial Park, Suzhou, Jiangsu 215026 China

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