Galvanized Welded Square Steel Pipe
Four equal faces and a zinc coating for frames posts and site structures
Specifications
Galvanized Steel Pipe, Square/Rectangle Steel Pipe
Galvanized Welded Rectangular Hollow Section Steel Pipe
Zinc coated welded rectangular section in lengths from 0.3 to 18 M
Galvanized welded rectangle steel pipe is electric resistance welded hollow section that is zinc coated after forming, so the flat faces and the corner radii carry the same protective layer. It is bought by structural fabricators, greenhouse and solar mounting builders and general engineering workshops working to ASTM A53, EN10217, DIN 2458, IS 3589, JIS G3452 or BS1387. Because it arrives already coated, the fabricator skips the paint shop queue and the site crew stops repainting sections that rusted in the yard before erection. The published range covers 21.3mm to 660.4mm with wall thickness from 1.5mm to 22.2mm in lengths from 0.3 to 18 M.
- Product Name — Galvanized Welded Rectangle Steel Pipe
- Standard — ASTM A53 EN10217 DIN 2458 IS 3589 JIS G3452 BS1387
- ASTM Material — A53 GR A and GR B
- EN Material — S275 S275JR S355JRH S355J2H
- GB Material — Q195 Q215 Q235 Q345 L175 L210 L245 L320 L360 to L555
Why It Is Specified
Key Benefits of Galvanized Welded Rectangle Steel Pipe
Zinc Coating Applied Before It Reaches Your Yard
The section is galvanized at the mill rather than painted in your workshop. Material can sit outdoors through a project delay without the surface preparation bill that follows bare black pipe.
Six Standards Quoted Against One Size Range
ASTM A53, EN10217, DIN 2458, IS 3589, JIS G3452 and BS1387 are all covered, which keeps a multi market project on a single purchase line.
Wall Thickness From Light Frame To Heavy Structure
Wall runs from 1.5mm up to 22.2mm, so the same supplier covers a light greenhouse purlin and a heavy column base section.
Length Cut To The Erection Sequence
Lengths are supplied from 0.3 M up to 18 M. Short members can be ordered cut instead of sawn from stock bars and paid for twice.
Grades Across American European And Chinese Systems
ASTM A53 Gr A and Gr B, EN S275 S275JR S355JRH and S355J2H, and GB Q195 through Q345 are all listed, so the drawing grade can be met directly.
Documented Test Regime
Chemical analysis, tensile yield and elongation, flattening bending blow and impact tests, size inspection and a hydrostatic test are all part of the stated test scope.
Problems It Solves
What This Material Removes From Your Process
Painted Sections Rusting Before Erection
Black section stored on a wet site starts corroding before it is lifted. A galvanized section reaches the structure with its coating already in place and does not need touching up before handover.
Paint Shop Capacity Setting The Programme
Coating in house creates a bottleneck between fabrication and dispatch. Buying the section already galvanized takes that step out of the workshop schedule entirely.
Drawings Written To A Standard You Cannot Source
A design called to IS 3589 or JIS G3452 often forces a substitution argument. All six listed standards come from the same range so the drawing grade can be quoted directly.
Paying For Offcuts On Short Members
Lengths start at 0.3 M, so short posts and cleats can be ordered at length instead of being cut from a 6 M bar with the remainder scrapped.
No Documentary Trail For The Inspector
An EN 10204/3.1 certificate plus the stated chemical mechanical and hydrostatic test results give the site inspector something to sign against.
Application Scenarios
Where It Is Used
Structural Frames And Portal Buildings
Rectangular members used as beams purlins and bracing where the flat faces simplify bolted and welded connections.
Greenhouse And Solar Mounting Structures
Coated section for outdoor frames that sit in wet soil and condensation for the whole service life.
Handrail Barrier And Fencing Systems
Rectangular tube for guardrails gates and perimeter fencing where the coating replaces a repainting cycle.
Conveyor Gantries And Plant Walkways
Support frames access platforms and walkway stringers in plants where painting an erected structure is awkward.
Trailer Body And Equipment Frames
Chassis rails and body frames on trailers and skid mounted equipment that are exposed to road spray.
Water And Service Line Supports
Sleeve and support sections to ASTM A53 or BS1387 used around buried and above ground service runs.
Who It Is For
Buyers Who Specify This Product
- Structural steel fabricators buying coated hollow section for frames they do not want to paint
- Greenhouse and solar mounting contractors specifying galvanized rectangular members for outdoor structures
- Civil contractors buying fencing barrier and handrail tube for site perimeters
- Trailer and equipment builders sourcing rectangular chassis rails to S355J2H or Q345
- Pipe and tube distributors carrying a wall range from 1.5mm to 22.2mm for regional workshops
- Project buyers reconciling a drawing written to BS1387 against a supply offered to EN10217
Technical Data
Specifications and Technical Features
Values below come from the product data published by Shandong Tianyu Metal Products. Confirm the exact grade and size against your order.
| Product Name | Galvanized Welded Rectangle Steel Pipe |
|---|---|
| Standard | ASTM A53 EN10217 DIN 2458 IS 3589 JIS G3452 BS1387 |
| ASTM Material | A53 GR A and GR B |
| EN Material | S275 S275JR S355JRH S355J2H |
| GB Material | Q195 Q215 Q235 Q345 L175 L210 L245 L320 L360 to L555 |
| Outside Diameter | 21.3mm to 660.4mm equal to 1/2 inch to 26 inch |
| Wall Thickness | 1.5 to 22.2mm |
| Length | 0.3 to 18 M |
| Technique | Welded |
| Surface | Galvanized |
| Certificate | EN 10204/3.1 |
| Test | Chemical component analysis mechanical properties technical properties exterior size inspection hydrostatic test |
| Certification | ISO9001 BV SGS RoHS |
| Place of Origin | China |
Technical Features
- Standards ASTM A53 EN10217 DIN 2458 IS 3589 JIS G3452 and BS1387
- ASTM A53 grades GR A and GR B
- EN grades S275 S275JR S355JRH and S355J2H
- GB grades Q195 Q215 Q235 Q345 and line pipe grades L175 to L555
- Outside diameter 21.3mm to 660.4mm equal to 1/2 inch to 26 inch
- Wall thickness 1.5mm to 22.2mm
- Length 0.3 M to 18 M
- Certificate issued to EN 10204/3.1
Materials
- ASTM A53 GR A and GR B carbon steel
- EN structural grades S275 S275JR S355JRH and S355J2H
- GB grades Q195 Q215 Q235 and Q345
- Line pipe grades L175 L210 L245 L320 and L360 to L555
- Zinc coating applied to the formed section
Certification
- ISO9001
- BV
- SGS
- RoHS
- EN 10204/3.1 certificate
Manufacturing
How It Is Made and Processed
Strip selection against the ordered ASTM EN or GB grade
Roll forming the strip to the rectangular profile
Electric resistance welding of the longitudinal seam
Sizing to the ordered outside diameter and wall thickness
Galvanizing the formed section
Cutting to ordered lengths between 0.3 and 18 M
Hydrostatic and dimensional testing
Bundling marking and packing for export
Quality Control
Checks Before It Ships
- Chemical component analysis against the ordered grade
- Mechanical testing for ultimate tensile strength yield strength and elongation
- Flattening bending blow and impact tests on the formed section
- Exterior size inspection against the ordered dimensions
- Hydrostatic test before release
- EN 10204/3.1 certificate issued with the shipment
Customization
What We Can Change on Your Order
- Section size selected within the 21.3mm to 660.4mm range
- Wall thickness chosen between 1.5mm and 22.2mm for the design load
- Cut lengths anywhere from 0.3 M to 18 M against your cutting list
- Grade specified in ASTM EN or GB designation to match the drawing
- Standard nominated from ASTM A53 EN10217 DIN 2458 IS 3589 JIS G3452 or BS1387
- Bundle size and marking arranged to suit the erection sequence
Comparison
Galvanized Welded Rectangle Steel Pipe Against the Alternatives
| Black welded rectangular tube | The zinc coating is already on the section, so there is no shop painting step and no touch up after outdoor storage. |
|---|---|
| Seamless rectangular pipe | Welded section is the economical choice for structural duty where the wall does not have to be seamless, and it covers the same 1.5 to 22.2mm wall range. |
| Galvanized angle or channel | A closed rectangular section carries torsion far better than an open profile and gives flat faces for bolted cleat connections. |
| Painted structural tube on site | Site painting depends on weather and access, while a galvanized section arrives coated and needs attention only where it is cut or welded. |
Use Guide
Specifying Handling and Welding Notes
- Name the governing standard on the order because ASTM A53 EN10217 and BS1387 differ in test and tolerance requirements
- Repair the coating at cut ends and welds with a zinc rich product to keep the protection continuous
- Ventilate enclosed sections before welding galvanized material and extract the fume at the arc
- Order cut lengths against the erection list rather than standard bars to avoid paying for offcuts
- Stack bundles clear of the ground with spacers so trapped water does not sit between sections
- Ask for the EN 10204/3.1 certificate with the shipment so the site inspector has the test record on delivery
Questions Buyers Ask
Galvanized Welded Rectangle Steel Pipe FAQ
What size range do you cover on rectangular section?
The published range runs from 21.3mm to 660.4mm, equal to 1/2 inch to 26 inch, with wall thickness from 1.5mm to 22.2mm.
Can you cut the pipe to our lengths?
Yes. Lengths are supplied from 0.3 M up to 18 M, so short members can be ordered at length instead of sawn from a standard bar.
Which certificate comes with the pipe?
An EN 10204/3.1 certificate is issued for the material, and the product is supplied under ISO9001, BV, SGS and RoHS certification.
What tests are carried out before shipment?
Chemical component analysis, tensile yield and elongation testing, flattening bending blow and impact tests, exterior size inspection and a hydrostatic test.
Our drawing calls S355J2H but the mill offers Q345. Is that acceptable?
Both grades are on the supply list, so tell us which designation the inspection will be carried out against and the material will be quoted and certified to that one.
Do we have to paint the section after erection?
The section is already galvanized. Attention is normally needed only where it has been cut, drilled or welded, and a zinc rich repair coating covers that.
How is the pipe packed for export?
Sections are bundled and marked before loading. Tell us the bundle size that suits your unloading equipment and the packing will be arranged to match.
Same Range
Related Products
Galvanized Seamless Rectangle Steel Pipe
Jointless hollow section with a zinc coated surface in schedule wall thicknesses
Specifications
Galvanized Seamless Square Steel Pipe
Jointless square section with heavy schedule walls and a zinc coated surface
Specifications
Galvanized Seamless Steel Pipe
Galvanized seamless pipe in A53 A106 A333 and S355 grades to fixed or random lengths
SpecificationsGo Deeper
Industries and Guides Related to This Product
Construction and Infrastructure
Construction and infrastructure buyers order steel by the part it becomes: mild steel plate for base plates gussets and stiffeners
Read more
Construction Machinery and Agriculture
One loader or one tractor needs four different steels and most fabrication shops buy them from four different suppliers. The struc
Read more
Power Generation and Energy
Energy projects are audited on documents as much as on steel. A boiler header, a cooling water line, a coal transfer chute and a s
Read moreNeed a Price on Galvanized Welded Rectangle Steel Pipe
Send the grade, thickness, width and quantity you need together with your destination port. A cutting list or drawing gets you a firmer number.