Tianjin Minjie Steel Co., Ltd. was established in 1998. Our factory covers more than 70,000 square meters, strategically located just 40 kilometers from XinGang Port, which is the largest port in Northern China, offering unmatched logistics efficiency for international cargo transport.
We are a professional manufacturer and exporter of premier steel products. Our core product portfolio features pre-galvanized steel pipes, hot-dip galvanized pipes, welded steel pipes, square & rectangular structural tubes, and integrated scaffolding systems. To drive technology leadership, we have successfully registered three national patents: groove pipe, shoulder pipe, and Victaulic pipe.
Our infrastructure includes 4 advanced pre-galvanized lines, 8 high-frequency Electric Resistance Welded (ERW) lines, and 3 specialized hot-dipped galvanized coating systems. Standardized manufacturing rules guide our processes to comply strictly with international designations, including GB, ASTM, DIN, and JIS under a comprehensive ISO9001 certified Quality Management System.
A structural analysis of why global engineering, procurement, and construction (EPC) companies choose Chinese steel manufacturing hubs, particularly the industrial clusters in Tianjin.
Modern ERW manufacturing lines utilize advanced induction currents to weld seams without addition of filler metals. This yields isotropic tensile strength across the profile, matching seamless integrity at a fraction of the cost.
We combine pre-galvanization and hot-dip techniques. Zinc coating weights are customizable from 60g/m² to over 600g/m², offering a reliable protective barrier against atmospheric oxidation even in coastal C4/C5 environments.
Proximity to Xingang Port reduces inland transit risks. With the factory just 40km away, we guarantee minimal handling stress and direct loading onto containerized vessel units or bulk vessels, cutting transit cost and emissions.
Operating a professional manufacturing and exporting enterprise means structural reliability is non-negotiable. Our QA lab performs mechanical tensile tests, yield point evaluations, flattening tests, and hydrostatic tests for structural pipe and square hollow sections (SHS). Every shipment is traceable back to the raw steel ladle batch, backed by MTRs (Mill Test Reports) complying with EN 10204 3.1 standards.
Standardized designations and custom physical properties configured at our Tianjin facility:
| Standard | Common Steel Grades | Size Range (mm) | Thickness (mm) | Surface Finishes |
|---|---|---|---|---|
| ASTM A500 / A513 | Gr. A, Gr. B, Gr. C, Gr. D | 15x15 to 400x400 | 0.6 to 16.0 | Light Oiled, Pre-Galvanized, HDG, Powder Coated |
| EN 10219 / EN 10210 | S235JRH, S275J0H, S355J2H | 20x20 to 500x500 | 0.8 to 20.0 | Bare Black, Zinc Rich Primer, Hot Dip Galvanized |
| JIS G3466 | STKR400, STKR490 | 15x15 to 300x300 | 1.0 to 12.0 | Pre-Galvanized, Anti-rust Painted, Galvanized |
| GB/T 6728 / 3094 | Q195, Q235B, Q345B, Q355B | 10x10 to 600x600 | 0.5 to 25.0 | Hot Dipped Galvanized, Painted, Bare Structural Steel |
Square structural tubing is selected for projects requiring multidirectional loading capabilities. The square cross-section exhibits uniform torsional resistance and strength distribution, making it superior to round profiles in space frame and joist designs.
We host client delegations and maintain customer support across major economic corridors worldwide.
Tianjin Minjie Steel proudly exhibits at the Canton Fair every year. Over 80% of our new customers make it a priority to visit our Tianjin factory complex following the fair to evaluate our technical capabilities first-hand.
Our sales support features veteran engineers and global trade professionals who ensure clear specification design, smooth customs compliance, and reliable product delivery across diverse borders.
Hot dipped galvanized steel coil, pre-painted galvanized steel coil, color-coated strip.
Hot Dipped Galvanized, Pre-Galvanized, and Zinc-Aluminum alloy steel pipe.
Square Steel Pipe, Rectangular Steel Pipe, Galvanized Square Steel Pipe.
Hot Rolled Equal Angle, Galvanized Angle steel structural bars.
Our commitment to precision manufacturing is backed by rigorous testing. We maintain systematic quality certifications that confirm our production runs meet the performance requirements of global construction and machinery sectors.
Beyond our standard catalog, Tianjin Minjie Steel operates customized lines dedicated to producing specialized steel grades such as Q355B/S355 for structural wind bracing and bridge infrastructure. Our specialized corrosion protection protocols provide extended material lifespans in demanding environmental conditions.
Technical specifications, standard tolerances, and production capabilities commonly requested by engineering procurement leads.
Explore our reference case list featuring custom specifications and engineered designs deployed globally.
Minjie Steel