In modern engineering, the 4 inch square steel pipe (specifically the 100mm x 100mm structural hollow section) serves as the backbone for high-stress applications. Beyond simple aesthetics, these pipes are engineered for superior torsional rigidity and compressive strength. As a leading manufacturer, Shaanxi Kerlimar focuses on "Semantic Quality"—ensuring that every technical specification meets the precise search intent of global procurement officers.
We utilize high-grade carbon steel (S235JR, S355J2H) and advanced stainless steel alloys. Our pipes adhere to ASTM A500, EN 10219, and JIS G3466 standards, ensuring consistency in wall thickness and corner radii.
Through our Premium Anti-Corrosion technology, we offer hot-dip galvanizing and electrostatic powder coating, extending the lifespan of square pipes in marine and industrial environments by up to 300%.
Utilizing ERW (Electric Resistance Welding) and seamless manufacturing techniques, we eliminate internal bead stress, providing a smooth finish essential for architectural and precision machinery applications.
Established in 2003, Shaanxi Kerlimar Engineers Co., Ltd. has been at the forefront of the international pipe and fitting trade for over 21 years. We specialize in carbon steel, alloy steel, and stainless steel solutions, ranging from seamless pipes to sophisticated spiral welded configurations.
Our commitment to ASTM, ASME, EN, and JIS standards makes us a trusted partner for global enterprises seeking high-performance steel products with a competitive edge in pricing and delivery.
Years of Experience
National Patents
National Certification
Supply Chain Network
Our Chairman, Mr. Ming SUN, drives a culture of environmental stewardship. Since 2019, we have pivoted towards clean energy technology, specifically vertical axis wind turbines. This innovative mindset translates directly into our steel pipe manufacturing, where we apply high-precision engineering used in wind power (maglev, grid structures) to our 4 inch square steel pipe production.
In 2021, we were recognized at the China-Finland High Technology Match Conference and awarded at the China Innovation and Entrepreneurship Competition. Our presence at the Dubai COP28 Conference underscores our dedication to the "Double Carbon" goals.
In urban development, the 4 inch square pipe is the standard for safety railings, pedestrian bridges, and framework for modern high-rises. Its uniform geometry allows for easy bolting and welding.
Specifically used in solar panel mounting systems and our patented vertical axis wind turbine support frames. The pipe's ability to withstand high wind loads makes it indispensable for green energy projects.
Used in the construction of large-scale automated greenhouse structures where high strength-to-weight ratios are critical for maximizing crop yield and structural stability.
The "Square Section Tube" is vital for conveyor belts, heavy machinery chassis, and automotive logistics racks, providing a stable platform for precision components.
China has evolved from a volume-based producer to a precision-based manufacturing hub. For global enterprises, sourcing 4 inch square steel pipes from Shaanxi Kerlimar offers three distinct advantages:
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