Square & Rectangular Tubes Manufacturer & Supplier in China
Our Square & Rectangular Tubes Product Range
Factory-direct square & rectangular tubes from our Tianjin plant, with MTC per EN 10204 3.1 on every shipment to Russia and Central Asia. Click a product for full specifications and a quote within 24 hours.
Square Steel Tube A500
ASTM A500 Gr.B / Gr.C | 20×20-200×200 mm, wall 1.0-12 mm
Square structural tubing to ASTM A500 for frames, racks and machinery, with sharp corners and tight tolerances.
Rectangular Steel Tube EN 10219
EN 10219, ASTM A500 | 40×20-200×100 mm, wall 1.0-12 mm
Rectangular hollow sections to EN 10219 for construction and fabrication, with certified mechanical properties.
Square Tube GOST 30245
GOST 30245 | 40×40-200×200 mm
Square profile pipe to GOST 30245 in St3 and 09G2S grades for Russian construction projects, with GOST documentation.
Pre-Galvanized Square Tube
EN 10305-5, GB/T 6728 | 20×20-100×100 mm, wall 0.8-3.0 mm
Ready-to-use pre-galvanized square tube for fences, solar mounts, furniture and light structures, no further coating needed.
Galvanized Rectangular Tube
EN 10219, ISO 1461 | 40×20-200×100 mm
Hot-dip galvanized rectangular tube for outdoor structures, trailers and agricultural equipment exposed to moisture.
Square Tube 09G2S
GOST 30245 | 40×40-200×200 mm
Low-alloy 09G2S square tube with improved low-temperature toughness for Russian and Siberian construction.
Cold-Formed Square Tube
EN 10219-2, GB/T 6728 | 20×20-200×200 mm
Cold-formed square hollow section with precise dimensions and smooth surface for visible structures and design elements.
Square Tube for Solar Mounting
EN 10219, GB/T 6728 | 40×40-100×100 mm
Square tube optimized for solar tracking and mounting structures, with zinc protection for 20+ years of outdoor service.
Why Buy Square & Rectangular Tubes Direct from a Chinese Factory
Importers and distributors who source square and rectangular tubes directly from our factory in Tianjin benefit from the complete manufacturing chain under one roof: steel input selection, production, surface treatment, quality testing, packing and export documentation. This integrated model removes trading markups and ensures that the specification approved in the quotation is the specification delivered.
- Direct factory pricing with no trading company markup
- Full quality control from steel input to finished product
- Complete documentation: MTC per EN 10204 3.1 on every shipment
- Flexible payment terms: T/T, L/C, D/A, D/P and O/A for long-term partners
- English and Russian sales support with a reply within 24 hours
- Sea freight to St. Petersburg, Novorossiysk, Vladivostok plus main EAEU ports
Range and Specifications of Our Square & Rectangular Tubes
| Standard | ASTM A500 / A513, EN 10219 |
| Available Grades | Q195, Q215, Q235, Q345, A500 Gr.B/C |
| Size Range | 20×20 – 200×200 mm, wall 1.0-12 mm |
| Surface / Finish | Black, galvanized or pre-galvanized |
| Certification | ISO 9001:2015, MTC per EN 10204 3.1, SGS / BV / TUV inspection available |
| Packaging | Seaworthy export packing, bundled or palletized per product |
| MOQ | 25 metric tons per size |
| Production Time | 15-25 days after specification confirmation |
| Payment | T/T, L/C, D/A, D/P, O/A |
How to Choose a Reliable Supplier in China
When comparing suppliers, buyers should evaluate five factors before placing a first order: factory ownership, documentation completeness, testing capability, delivery reliability and communication. A genuine factory supplier can show production lines, heat number traceability and in-house testing; a trading company can only relay documents.
- Verify factory ownership and production capacity
- Request the MTC and test reports from recent shipments
- Confirm the governing standard and grade for every size
- Agree on packing, marking and documentation requirements in writing
- Start with a sample or small order to verify product and service quality
Global Supply Capabilities and Export Markets
Sino East Steel operates within a 65,000 m² plant in Daqiuzhuang Industrial Park, Jinghai District, Tianjin, with an annual capacity of 500,000 metric tons across all product lines. We export to more than 50 countries, with growing demand from Russia and the CIS for certified steel products.
- Monthly rolling production plans reserve capacity for scheduled deliveries
- Container consolidation programs combine multiple product lines
- Dedicated export team with multi-market documentation experience
- Distribution agreements and exclusive-territory arrangements available
Quality, Certification and Factory Audit
Our factory operates under an ISO 9001:2015 quality management system, and every production batch is tested in accordance with the governing specification: chemical analysis, mechanical testing, dimensional checks and product-specific tests. Every item is traceable to its heat number through the Mill Test Certificate (MTC) per EN 10204 3.1. SGS, BV and TUV inspections can be arranged before loading.
How to Order as an Importer
- Send your required standard, grade, size, quantity and destination port
- Receive a formal quotation with delivery time and shipping options within 24 hours
- Confirm the specification in writing; production starts after order confirmation
- Track your shipment with full export documentation until arrival at the destination port
Frequently Asked Questions
What is the MOQ?
The MOQ is typically 25 metric tons per size, with mixed-size container loads of 20 or 40 feet welcomed for distributors.
What are your payment terms?
We accept T/T, L/C, D/A, D/P and O/A for long-term partners, with terms confirmed in the quotation for each order.
What is the production and shipping lead time?
Production takes 15-25 days after specification confirmation, followed by sea freight to St. Petersburg, Novorossiysk and main EAEU ports.
Can third-party inspection be arranged?
Yes, inspection by SGS, BV or TUV can be arranged at the factory before loading or at the destination port.
Do you support OEM and custom requirements?
Yes, we support OEM orders including custom sizes, finishes, packing marks and documentation, subject to MOQ.
Explore Our Square & Rectangular Tubes Range
Browse the full product range: Square & Rectangular Tubes category.
Request a Quote for Square Rectangular Tubes Manufacturer
Factory-direct price, MTC per EN 10204 3.1, EAC/GOST documentation and delivery to Russia and Central Asia. Our export desk replies within 24 hours.
Prefer email? Write to [email protected] or call / WhatsApp +86 186 2208 8833.