RUNYING Steel Group is a premier Tangshan-based manufacturer and exporter supplying high-performance precision welded (ERW) and seamless steel pipes to global oil & gas pipelines, structural engineering, mechanical fabrication, and solar energy projects.

Operating under a strict ISO 9001 Quality Management System, our steel tubes deliver exceptional dimensional precision (±0.15mm wall tolerance for ERW and ±0.05mm for cold-drawn precision tubes) with 100% non-destructive eddy current and ultrasonic testing (NDT/NDE) prior to ocean export via Tianjin Port.

Technical Specifications & Product Parameters

Key Core Advantages of RUNYING Steel Tubes

1. Structural Precision & Bending Strength:

 · Delivers up to 40% higher structural bending resistance in square and rectangular hollow sections. Cold-drawn mechanical tubes maintain an ultra-tight precision tolerance of ±0.05mm.

2. Sour Service & High-Pressure Compliance:

 · Specifically engineered for sour service applications with HIC/SSC crack resistance (compliant with NACE TM0284 / NACE MR0175) and capable of handling up to 42 MPa (SCH160) working pressure.

3. ISO 9001 Certified Quality Control:

 · Every batch undergoes full chemical spectrographic analysis, mechanical tensile/impact testing, hydrostatic testing, precision bevel end processing (API 5CT standard), and anti-rust surface oiling or 3LPE/FBE coating.

4. Sea-worthy Export Packaging:

 · Heavy-duty export bundles protected with plastic pipe end caps, high-tensile steel strapping, and waterproof anti-corrosion VCI wrapping for ocean shipping.

Industry Solutions & Recommended Specifications

Related Technical Guides & Products

 · Learn how density and coil/pipe geometry influence ocean freight limits: Why Are Steel Coils So Heavy? (Calculation & Density Guide)

 · Explore hot-dip galvanized flat steel options for ducting and framing: Hot-Dip Galvanized Steel Sheet in Coil (GI Sheet)

Request Your Factory-Direct Steel Pipe Quote

Looking for API 5L seamless line pipes, ERW structural hollow sections, or hot-dip galvanized water pipes? Receive real-time factory pricing, ISO 9001 / API compliance documentation, and Tianjin Port container loading solutions within 24 hours:

 · Direct Sales Email: admin@tsrysteel.com

 · WhatsApp / Phone: +86 15176700707

 · Official Web Homepage: http://www.tsrysteel.com

 · Product Catalog: Explore All Seamless, Welded & Structural Steel Solutions →