Galvanized Welded Rectangle Steel Pipe
Zinc coated welded rectangular section in lengths from 0.3 to 18 M
Specifications
Galvanized Steel Pipe, Square/Rectangle Steel Pipe
Galvanized Welded Square Hollow Section Steel Tube
Four equal faces and a zinc coating for frames posts and site structures
Galvanized welded square steel pipe is a closed square hollow section, formed and seam welded from strip and then zinc coated so every face and corner carries the same protection. Designers reach for it when a member has to take load from more than one direction and still present a flat face for a bolted or welded cleat, and it is specified against ASTM A53, EN10217, DIN 2458, IS 3589, JIS G3452 and BS1387. Buying it coated means the fabrication shop can go straight from cutting and drilling to dispatch without booking paint booth time. Sizes span 21.3mm to 660.4mm with wall from 1.5mm to 22.2mm and lengths anywhere between 0.3 and 18 M.
- Product Name — Galvanized Welded Square 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 Square Steel Pipe
Equal Section Properties On Both Axes
A square profile behaves the same way about both principal axes, which simplifies column and post design and removes the orientation mistakes that happen on site with rectangular members.
Coating Already Applied At The Mill
The zinc layer goes on the formed section, so cut and drilled members can be dispatched without a painting stage. Only the cut ends and welds need local attention.
Standards Written For Six Different Markets
ASTM A53, EN10217, DIN 2458, IS 3589, JIS G3452 and BS1387 are all supported, so a design exported to another market does not need a redraw or a substitution note.
Load Grades From Q195 Up To S355J2H
The grade list covers ASTM A53 GR A and GR B, EN S275 to S355J2H and GB Q195 to Q345, so post sections and heavy columns can share one purchase order.
Wall Range That Covers Fence Post To Column
Wall thickness from 1.5mm to 22.2mm means the same source handles a light fencing upright and a loaded structural column.
Hydrostatic And Mechanical Testing On Record
Chemical analysis, tensile yield and elongation, flattening bending blow and impact tests, size inspection and a hydrostatic test are all named in the test scope.
Problems It Solves
What This Material Removes From Your Process
Maintenance Painting On Outdoor Frames
A painted frame in a wet environment needs recoating within the building life. The galvanized section moves that cost out of the maintenance budget.
Orientation Errors During Erection
Rectangular members fitted the wrong way round change the stiffness of the frame. A square section has the same properties either way, so the crew cannot get it wrong.
Mixed Standard Project Documentation
A project quoting JIS G3452 on one drawing and DIN 2458 on another normally means two supply chains. Both are covered here from the same size range.
Scrap From Cutting Short Members
Posts and cleats cut from 6 M bars leave unusable remainders. Lengths from 0.3 M upward let you order the member instead of the bar.
Missing Test Evidence At Handover
An EN 10204/3.1 certificate with the chemical mechanical and hydrostatic results attached answers the inspector without a chase back to the mill.
Application Scenarios
Where It Is Used
Columns And Posts In Light Steel Buildings
Square members carrying axial load in portal frames canopies and mezzanine structures.
Carport Canopy And Shed Framing
Outdoor frames where the coating has to survive rain and condensation without a maintenance painting cycle.
Fencing Gates And Security Barriers
Upright posts and gate frames set in ground or bolted to base plates around plants and compounds.
Racking Shelving And Workshop Furniture
Square tube frames for storage racks benches and machine guarding where flat faces take bolted panels.
Scaffold Bracing And Temporary Works
Bracing members and props on temporary structures that are erected dismantled and stored outdoors repeatedly.
Agricultural Buildings And Livestock Structures
Frames pens and gates in wet corrosive farm environments where painted steel fails early.
Who It Is For
Buyers Who Specify This Product
- Light steel building fabricators buying square columns and posts already galvanized
- Fencing and gate contractors sourcing coated upright posts in the 1.5mm to 22.2mm wall range
- Racking and shelving manufacturers specifying square tube frames to Q235 or S275
- Carport and canopy installers buying members cut between 0.3 M and 18 M for direct erection
- Agricultural building contractors replacing painted frames that corrode in livestock housing
- Tube distributors stocking square section against ASTM A53 JIS G3452 and BS1387 for mixed customers
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 Square 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 ultimate tensile strength yield strength elongation flattening bending blow and impact tests 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
- Square hollow section welded from strip then galvanized
- ASTM A53 GR A and GR B material
- EN S275 S275JR S355JRH and S355J2H material
- GB Q195 Q215 Q235 Q345 and L175 to L555 material
- 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 with EN 10204/3.1 certificate
Materials
- Carbon steel to ASTM A53 GR A and GR B
- European structural grades S275 S275JR S355JRH and S355J2H
- Chinese grades Q195 Q215 Q235 and Q345
- Line pipe grades L175 through L555
- Zinc coating covering all four faces and the corner radii
Certification
- ISO9001
- BV
- SGS
- RoHS
- EN 10204/3.1 certificate
Manufacturing
How It Is Made and Processed
Strip cut to the developed width for the ordered square size
Roll forming to the square profile with formed corner radii
Longitudinal seam welding
Sizing and straightening to the ordered dimensions
Galvanizing of the finished section
Cutting to ordered lengths within the 0.3 to 18 M range
Hydrostatic and dimensional inspection
Bundling strapping and marking for export
Quality Control
Checks Before It Ships
- Chemical component analysis against the ordered ASTM EN or GB grade
- Tensile yield strength and elongation measured on the finished section
- Flattening bending blow and impact tests recorded
- Exterior size inspection covering face width wall and length
- Hydrostatic test carried out before release
- EN 10204/3.1 certificate raised against the shipment
Customization
What We Can Change on Your Order
- Square face size chosen within the published 21.3mm to 660.4mm range
- Wall thickness set anywhere from 1.5mm to 22.2mm for the design load
- Cut lengths from 0.3 M to 18 M supplied against your member schedule
- Grade nominated in ASTM EN or GB terms to match the drawing
- Inspection standard chosen from the six listed specifications
- Marking and bundle configuration set to your site handling equipment
Comparison
Galvanized Welded Square Steel Pipe Against the Alternatives
| Rectangular hollow section | A square section has identical properties on both axes, which suits columns and posts where load direction is not fixed. |
|---|---|
| Round galvanized pipe | Flat faces take bolted cleats brackets and infill panels directly without saddles or coped connections. |
| Painted square tube | Zinc coating applied at the mill removes the shop painting stage and the first maintenance repaint on outdoor structures. |
| Galvanized angle sections | A closed square profile resists torsion far better than an open angle at a comparable weight. |
Use Guide
Specifying Handling and Welding Notes
- State which of the six standards governs the order so the correct tolerance and test set is applied
- Treat cut ends drilled holes and site welds with a zinc rich coating to close the gaps in the protection
- Provide fume extraction when welding galvanized material and keep the arc out of the operator breathing zone
- Set base plates and fixings so water drains off horizontal faces instead of ponding on them
- Send a member schedule so lengths arrive cut and the yard does not generate offcuts
- Store bundles on timber bearers with air gaps to prevent wet storage staining between sections
Questions Buyers Ask
Galvanized Welded Square Steel Pipe FAQ
What wall thicknesses are available in square section?
Wall thickness runs from 1.5mm to 22.2mm, which covers light fencing posts through to loaded structural columns.
Can I mix grades on one order?
Yes. ASTM A53 GR A and GR B, EN S275 to S355J2H and GB Q195 to Q345 are all on the supply list and can appear as separate line items.
What length can you supply?
Anywhere from 0.3 M to 18 M. Give us the member schedule and sections are cut before shipment.
Is the pipe hydrostatically tested?
Yes. A hydrostatic test is part of the stated test scope alongside chemical analysis, mechanical testing and exterior size inspection.
Do you supply to Indian and Japanese standards?
IS 3589 and JIS G3452 are both on the standards list, together with ASTM A53, EN10217, DIN 2458 and BS1387.
How should we handle welding on the galvanized surface?
Weld with extraction in place and clean the zinc back from the joint area, then restore the coating over the finished weld with a zinc rich product.
What documents come with the shipment?
An EN 10204/3.1 certificate covering the ordered grade, plus the ISO9001, BV, SGS and RoHS certification held for this product.
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