High-Quality Square & Rectangular Tubes Manufacturer

Leading Global Supplier of Structural Steel Solutions & Sustainable Engineering Excellence

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Shaanxi Kerlimar Engineers Co., Ltd

Established in 2003, Kerlimar has been at the forefront of international steel trade for over two decades. We specialize in high-grade square and rectangular tubes, carbon steel, and alloy solutions meeting global standards like ASTM, ASME, EN, and JIS.

21+ Years Experience
40+ Global Patents
OEM Custom Service
PCT Int'l Patents

方形矩管行业发展趋势 / Industry Roadmap & Future Evolution

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Green Steel & Sustainability

The global steel industry is pivoting towards "Green Steel." As a company deeply committed to environmentalism, we focus on low-carbon manufacturing processes for our rectangular section tubes, aligning with the global 1.5°C temperature control goal.

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Prefabricated Construction

High-precision square tubes are the backbone of modern modular architecture. The shift toward prefabricated buildings demands tighter tolerances and higher structural integrity, which our automated factory lines provide.

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Advanced Alloy Integration

Beyond traditional carbon steel, the industry is seeing a surge in demand for lightweight, high-strength alloy square tubes that offer superior weight-to-strength ratios for the aerospace and automotive sectors.

Company Culture
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Global Procurement & Supply Chain Resilience

Modern procurement is no longer just about price; it's about Technical Reliability and ESG Compliance. Global enterprises are seeking partners who understand the macro-economic shifts. Under the leadership of Mr. Ming SUN, Kerlimar integrates environmental stewardship with technological innovation.

  • Timely Delivery: Optimized logistics for seamless cross-border trade.
  • Certification: Full compliance with ASTM, EN, and JIS standards.
  • Environmental Impact: Focus on clean energy technology R&D.

Macro-Industry Solutions: From Steel to Clean Energy

The Convergence of Steel & Wind Energy

Since 2019, Kerlimar has branched into clean energy R&D, specifically Vertical Axis Wind Turbine (VAWT) technology. Our high-quality steel tubes serve as the structural foundation for these innovations. With over 40 patents, we are solving the bottlenecks of traditional wind power through:

  • Rail Maglev & Suspension Systems: Utilizing precision-engineered steel frameworks.
  • Grid Structures: Enhancing the stability of land-based and floating wind units.
  • Scalable Units: Developing 10KW-500KW series for rural revitalization.
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Excellence & Awards

National High-tech Enterprise (2020), Excellence Award in the 11th China Innovation and Entrepreneurship Competition, and participants of COP28 Dubai. Our strength lies in bridging heavy industry with future-tech.

Our Strength
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Our Strength & Global Responsibility

"We will become an indispensable part of the new productivity." Shaanxi Kerlimar is dedicated to the "Double Carbon" goals. By providing high-quality seamless and welded pipes, we support the infrastructure necessary for a sustainable future. Our commitment to the global average temperature rise limit of 1.5°C is reflected in every project we undertake.

Localization Support & Quality Assurance

Localized Technical Support

We provide on-site engineering consultation and local compliance verification to ensure that every square tube meets the specific building codes of the destination country, whether in Europe, North America, or Southeast Asia.

Rigorous Quality Control

Every batch undergoes non-destructive testing (NDT), ultrasonic inspection, and chemical analysis. We provide full MTC (Material Test Certificates) according to EN 10204 3.1 or 3.2.

Strategic Stockpiling

To mitigate global supply chain fluctuations, we maintain a robust inventory of standard sizes, allowing for rapid deployment to urgent infrastructure projects worldwide.

Frequently Asked Questions (FAQ)

What are the primary advantages of square and rectangular tubes over round pipes?
Square and rectangular tubes (Hollow Structural Sections) offer better flat surfaces for joining and welding. They provide higher torsional resistance and are more efficient for column and beam applications in construction.
How does Kerlimar ensure the anti-corrosion properties of its pipes?
We offer various coating options, including hot-dip galvanizing, 3PE coating, and FBE (Fusion Bonded Epoxy), specifically designed to withstand harsh industrial and offshore environments.
Can you handle custom OEM specifications for large-scale energy projects?
Yes, Shaanxi Kerlimar specializes in OEM manufacturing. With over 21 years of experience and 40+ patents, we can tailor chemical compositions and physical dimensions to meet unique project requirements, such as vertical wind power structures.
What standards do your products comply with?
Our manufacturing follows international benchmarks including ASTM (A500, A53), ASME, EN (10210, 10219), and JIS standards, ensuring global interoperability and safety.