Explore our premium grade steel tubes, coils, and scaffolding system accessories manufactured to strict global engineering standards.
Established in 1998, Tianjin Minjie Steel Co., Ltd. has grown into an international benchmark for structural steel manufacturing and scaffolding systems (Echafaudage Professionnel). Our advanced fabrication plant spans over 70,000 square meters, strategically situated just 40 kilometers from XinGang Port, the primary maritime gateway in Northern China. This logistics advantage guarantees seamless export operations and optimized transit timelines for global construction campaigns.
As a licensed manufacturer and exporter, we specialize in high-strength pre-galvanized steel pipes, hot-dip galvanized structural tubes, ERW welded steel tubes, square/rectangular hollow sections (RHS/SHS), and comprehensive modular scaffolding frameworks. We hold 3 national utility patents, including custom designs for Groove Pipes, Shoulder Pipes, and high-pressure Victaulic Couplings, reflecting our dedication to mechanical R&D.
Scaffolding is not just steel tubes—it is the structural backbone of personnel safety and structural load distribution in modern mega-infrastructure projects.
Whether in urban high-rises or infrastructure projects, our EN 12810 standard Ringlock (Echafaudage Multidirectionnel) and Cuplock systems provide massive load-bearing capacities. The steel tubing (primarily Q345B grade) offers optimized yield strength, lowering the overall weight of scaffold towers while retaining structural rigidity.
Refineries present highly corrosive, high-temperature, and hazardous environments. Our hot-dip galvanized scaffolding tubes feature a zinc coating thickness exceeding 500g/m² (70+ microns), ensuring superior rust and corrosion resistance. Perfect for circular boiler scaffolding, piperack access, and routine maintenance turnarounds.
Offshore structures demand absolute failure-proof design. Salt spray resistance is maximized through specialized chemical passivation of our structural steel tubes. Engineered to handle seismic, high-wind, and tidal forces, Minjie's scaffolding components are trusted in deep-sea installations and harbor maintenance.
| Scaffolding & Structural Tubing Standard | Steel Grade & Yield Strength | Zinc Coating Options | Typical Applications |
|---|---|---|---|
| EN 12810 / EN 12811 (European Scaffolding Standard) | S235JR (≥ 235 MPa) / S355JR (≥ 355 MPa) | Hot-Dip Galvanized (HDG) ≥ 500 g/m² (70 μm) | Facade Scaffolding, Heavy Shoring, Multidirectional Access |
| BS 1387 / EN 10255 (British Standard Tube) | Class A, B, C (Q235B Equivalent) | Pre-Galvanized (200 g/m²) or Hot-Dip Galvanized | Tube & Clamp Scaffolding Systems, Mechanical Piping |
| ASTM A53 / A500 (American Structural Specification) | Grade A, B, C (Q235B / Q345B / Q355B) | Untreated Black Steel / Galvanized / Powder Coated | Structural Columns, Frames, Roof Truss Beams |
| JIS G3444 (Japanese Scaffolding Tube Standard) | STK400 (Yield ≥ 235 MPa) / STK500 (Yield ≥ 355 MPa) | Electro-galvanized / Hot-Dip Galvanized | System Scaffolding, Framing Tubes, Safety Handrails |
Our commitment to technical consultation and customer service has forged long-term distribution networks in over 50 countries.
In September 2019, we visited our clients in Singapore to audit onsite scaffolding safety performance and solidify long-term procurement lines.
A leading Korean construction conglomerate visited our factory in 2019, bringing custom design plans. We fabricated custom modular frames meeting local KOSHA requirements.
Our long-term Australian partners returned in November 2018 for a comprehensive quality control audit, certifying our hot-dip galvanized AS1576 scaffolding tubes.
After evaluating multiple regional plants, a top Indian infrastructure firm selected Tianjin Minjie in 2019, signing a monthly contract for 10 structural containers.
A major Middle Eastern distributor inspected our facilities in June 2017 and signed an immediate order for 1,000 tons of high-strength structural tubes.
Initially connected at the Canton Fair, our Saudi Arabian partners visited our plant in 2018. They signed a supply chain contract for heavy-duty scaffolding pipes.
Tianjin Minjie is a regular exhibitor at the prestigious Canton Fair. These events allow us to connect with B2B buyers directly, explaining our quality control procedures, mechanical testing regimens, and steel grade options. Approximately 80% of our new clients visit our manufacturing site in Tianjin post-fair, confirming our technical capabilities and factory output firsthand.
Our production facilities utilize modern technology to ensure every structural tube maintains absolute dimensional and structural uniformity.
Our manufacturing processes conform to the ISO 9001:2015 Quality Management System. Raw steel coils from domestic giants (like HBIS and Baosteel) are chemically and mechanically analyzed before entering the mill. Our testing labs perform regular yield/tensile strength tests, flattening tests, and hydrostatic pressure verification.
We operate 4 pre-galvanized production lines, 8 High-Frequency ERW tube lines, and 3 dedicated hot-dip galvanizing lines, maintaining complete control over manufacturing from raw steel coil to finished pipe bundle.
Tianjin Minjie is actively developing next-generation structural steel solutions, minimizing lifecycle costs for project developers.
We are incorporating ZAM coatings into our structural product line. ZAM coatings provide up to three times the corrosion resistance of standard hot-dip galvanization, offering self-healing protection on sheared edges and reducing maintenance overhead in industrial environments.
By shifting to refined low-carbon S355JR steel, our engineering team has reduced wall thickness requirements by 15% without compromising structural integrity. This delivers a lighter, safer scaffolding system that reduces manual labor and shipping costs.
To meet modern environmental standards, we employ chromium-free passivation techniques. Our operations utilize high-efficiency gas-fired systems, aligning our processes with global sustainability regulations.
Explore our structural tubing, steel coils, and heavy building materials used on sites worldwide.
PPGI, PPGL, Powder Coated Steel Coil & Color Strips
HDG, Pre-Galvanized, Zinc-Aluminum Scaffolding Tube
SHS & RHS Structural Hollow Sections
Hot Rolled Equal/Unequal Galvanized Angle Iron
Reliable rectangular steel pipes for machinery, manufactured in compliance with EN 10219 standards.
High-tensile Q235B low carbon structural tubing ideal for construction projects.
Hollow-section steel posts, designed for fencing, structural supports, and foundation piles.
Threaded and coupled BS1387 tubing for scaffolding systems and light fluid transportation.
Tianjin metal building materials customized welded steel pipes for construction.
Tianjin metal building materials customized welded steel pipes for construction.
Large-diameter spiral welded steel pipes for pipelines, piling, and structural columns.
Direct factory pricing for hot-dip galvanized pipes suited for greenhouse and plumbing networks.
Heavy wall thickness black welded steel pipe Q345 for mechanical and structural load frames.
Get answers to technical queries, shipping timelines, packaging configurations, and global compliance standards.
Complete your supply chain with our range of structural hollow section tubes, high-frequency welded pipes, and carbon steel coils.
Minjie Steel
