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Steel hollow sections are fundamentally categorized into round, rectangular (RHS), and square (SHS) profiles. These carbon steel tubes serve as the foundational framework for demanding structural projects, ranging from heavy-duty construction and engineering to low-pressure liquid delivery, fencing, and greenhouse architecture. The surface finish is meticulously processed, offering options in raw black steel or a heavily galvanized coating. The galvanized finish provides a distinct, smooth tactile feel and a visually uniform spangle, engineered specifically to resist harsh corrosive elements, rust, and acidic environments, thereby significantly extending the lifecycle of the infrastructure. Beyond basic durability, these structural hollow sections deliver an exceptional strength-to-weight ratio. Their uniform stress distribution, excellent ductility, and superior buckling resistance allow engineers to reduce the overall dead load of buildings, ultimately driving down material costs while maintaining uncompromised structural integrity and ease of welding.
Brand name: Friend | |||||
Factory address: Tianjin, China | |||||
Product name: SHS ( square hollow section ), RHS ( rectangular hollow section) | |||||
Size: 20*20 - 400*400 | |||||
Thickness: 0.6-16 mm | |||||
Material: Q195, Q235, Q345 / S235, S355 / SS400 STK500 | |||||
Standard：GB T3094, EN10210, ASTM A500, etc. | |||||
Application: mainly construction | |||||
Surface treatment: black, HD galvanized, pre galvanized, painted, etc. | |||||
Certification: ISO, SGS, BV and other third party testing |
Our manufacturing facility operates multiple advanced Electric Resistance Welding (ERW) production lines, ensuring a steady and reliable output capable of fulfilling large-scale procurement demands without delay. By maintaining a robust upstream raw material supply chain, we guarantee consistent metallurgical properties across every batch, from the initial melt to the final extrusion. To ensure maximum reliability, each steel tube undergoes stringent non-destructive testing (NDT), checking for micro-fissures and weld integrity. We implement a comprehensive traceability system with independent serial numbers for every production run, guaranteeing that all structural hollow sections strictly comply with international standards such as ASTM, EN, and GB. This meticulous attention to detail minimizes project risks and ensures structural safety in critical applications.
These carbon steel tubes are engineered solutions designed for diverse and rigorous environments. They are extensively utilized in constructing heavy steel structures, providing essential support for bridge frameworks, and serving as durable components in machinery manufacturing and the automotive industry. Furthermore, their solid pressure tolerance makes them highly suitable for oil and gas pipeline protection, adapting seamlessly to both exposed outdoor conditions subject to wind and rain, and intensive industrial settings where vibration and stress are constant factors.
square hollow section | rectangular hollow section | other size can also be customized | ||
20*20 | 100*100 | 40*20 | 120*60 | |
25*25 | 120*120 | 50*30 | 120*80 | |
30*30 | 140*140 | 60*40 | 140*80 | |
40*40 | 150*150 | 70*50 | 150*100 | |
50*50 | 160*160 | 80*40 | 160*80 | |
60*60 | 180*180 | 80*60 | 180*100 | |
80*80 | 200*200 | 100*40 | 200*100 | |
250*250 | 100*50 | 250*150 | ||
300*300 | 100*60 | 300*100 | ||
350*350 | 100*80 | 300*150 | ||
400*400 | 300*200 | |||
400*200 | ||||
400*300 | ||||
Beyond the standard dimensions listed above, we understand that complex engineering projects often require tailored solutions. We provide comprehensive, one-stop deep fabrication services to match your exact specifications. Our capabilities include precision laser cutting for exact lengths, expert welding for pre-assembled components, accurate hole drilling for immediate on-site bolting, and specialized bending or forming to accommodate unique architectural designs. Additionally, we offer OEM branding and dedicated engineering design support. This means your structural hollow sections arrive at the site ready for immediate installation, drastically reducing your local labor costs, eliminating the need for secondary processing facilities, and accelerating project timelines. Whether you require distinct wall thicknesses for varying load-bearing requirements or specific steel grades for extreme temperature environments, our technical team collaborates directly with your engineers to deliver exact matches.
Visual inspection is a critical component of our material verification process. The following images showcase the distinct surface finishes, precise edge formations, and uniform structural integrity of our hollow sections. From the raw, dark finish of standard carbon steel to the bright, spangled appearance of our heavy-duty galvanized tubes, these visual records reflect the stringent manufacturing standards maintained across our production facilities.
Protecting the integrity of the steel during transit is a top priority. Every bundle of our structural hollow sections is meticulously prepared for the rigors of international ocean freight. Our standard packaging protocol includes:
End Protection: Application of durable plastic caps on both ends to prevent internal debris accumulation and edge damage during transit.
Surface Preservation: Comprehensive coating with anti-rust oil, combined with heavy-duty waterproof woven bag wrapping to resist marine moisture.
Flexible Container Loading: Optimized stacking and securing within 20ft and 40ft containers, alongside bulk cargo arrangements for oversized dimensional orders, ensuring safe and punctual delivery to any global port.
To facilitate a smooth and secure purchasing experience, we have structured our supply chain services to minimize buyer risk. We encourage material verification by offering free sample testing prior to mass production. Our financial terms are designed for flexibility, supporting secure payment methods including T/T and L/C. Coupled with a reasonable Minimum Order Quantity (MOQ) policy and a strictly adhered-to, transparent delivery schedule, our dedicated commercial team provides end-to-end support, ensuring your procurement process is as solid and reliable as the steel we manufacture.
