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 Rectangle Steel Pipe and Hollow Section
Zinc coated rectangular hollow section in ASTM JIS and EN grades cut to length
Galvanized rectangle pipe is a rectangular hollow section carrying a zinc coating that protects the steel in outdoor and damp service. Structural fabricators, greenhouse and solar mounting builders, fencing contractors and equipment frame shops specify it when a painted section would need repainting within the life of the structure. Buying it already galvanized and cut to length removes a separate coating trip and the touch-up work that follows site cutting. Grades are quoted across the ASTM, JIS and EN BS families so one enquiry can cover projects written to different codes.
- Product Name — Galvanized Rectangle Pipe
- Also Known As — Galvanized rectangular hollow section
- ASTM Material — A36 A53 Gr. A Gr B A106 GR.A GR.B A333 GR1 GR3 GR6
- JIS Material — SS330 SS440 SS490 SPHD SPHE
- EN BS Material — S185 S235 S235JR S235 G2H S275 S275JR S355JRH S355J2H
Why It Is Specified
Key Benefits of Galvanized Rectangle Pipe
Corrosion Protection Applied Before Delivery
The zinc coating is on the section when it arrives, so a frame can be assembled and installed without booking a separate galvanizing run.
Three Grade Families on One Enquiry
ASTM A36 A53 A106 and A333, JIS SS330 SS440 SS490 SPHD SPHE, and EN BS S185 to S355J2H are all quoted, so a drawing written to any of the three can be priced from the same stock list.
Wall Thickness Across the Full Schedule Range
Walls run from SCH5S up to SCH160 and XS, covering 1.65mm to 80mm, so light fencing rails and heavy machine bases come from the same supplier.
Fixed Lengths That Match Container Loading
5.8m and 6m fixed lengths load cleanly into a standard container while 12m fixed suits long span members and 2-12m random reduces cost where offcuts are usable.
Rectangular Section for Flat Faced Connections
Flat faces simplify bolted brackets, cladding fixings and plate welds compared with a round tube that needs a saddle cut or a shaped seat.
Sizes Outside the Standard List on Request
Outside diameter, wall thickness and length are all quoted as customized, so a non-standard section can be produced instead of forcing a redesign.
Problems It Solves
What This Material Removes From Your Process
Paying Twice for Coating and Handling
Buying black section then sending it out to galvanize adds a transport leg and a queue. Section that arrives already galvanized goes straight into fabrication.
Drawings Written to a Grade You Cannot Source Locally
A frame specified in S275JR or SS490 often stalls a buyer working from an ASTM stock list. All three grade families are quoted together so the substitution discussion happens before the order.
Cutting Waste on Random Length Bundles
5.8m, 6m and 12m fixed lengths cut to a repeating module with little drop, while 2-12m random is available where the yard can use short pieces.
Thin Wall Sections Failing Under Load
Wall thickness up to 80mm is available, so a member that keeps deflecting can be stepped up in wall rather than changed to a heavier and larger section.
Standard Sizes That Do Not Fit the Design
Outside dimensions, wall and length are quoted as customized, which avoids reworking a design around whatever is on a stock list.
Application Scenarios
Where It Is Used
Greenhouse and Solar Mounting Frames
Purlins, posts and rails exposed to rain, irrigation water and soil contact where a painted section would corrode at the fixings first.
Fencing Gates and Handrail Posts
Perimeter fencing, gate frames and balustrade posts that stay outdoors for the life of the site.
Light Industrial Building Frames
Columns, bracing and secondary steelwork in workshops, canopies and covered walkways.
Equipment Frames and Machine Bases
Welded bases, guarding frames and conveyor supports where flat faces make bolting and plate welding straightforward.
Agricultural Structures and Livestock Pens
Sheds, pens and feed equipment where moisture and manure attack unprotected steel.
Signage and Display Structures
Sign gantries, billboard frames and display supports that need corrosion protection without a maintenance program.
Who It Is For
Buyers Who Specify This Product
- Steel fabricators buying galvanized hollow section for outdoor frames and canopies
- Greenhouse and solar mounting installers buying posts and purlins in fixed lengths
- Fencing and gate contractors buying rails and frame sections by the bundle
- Machine builders buying rectangular section for welded bases and guarding
- Project buyers matching a drawing written to ASTM JIS or EN BS grades
- Distributors and stockists buying mixed wall thicknesses for a regional trade counter
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 Rectangle Pipe |
|---|---|
| Also Known As | Galvanized rectangular hollow section |
| ASTM Material | A36 A53 Gr. A Gr B A106 GR.A GR.B A333 GR1 GR3 GR6 |
| JIS Material | SS330 SS440 SS490 SPHD SPHE |
| EN BS Material | S185 S235 S235JR S235 G2H S275 S275JR S355JRH S355J2H |
| Outside Diameter | 1/2 inch to 48 inch from 21.3mm or customized |
| Wall Schedule | SCH5S SCH10S SCH20S SCH20 SCH30 STD SCH40 SCH60 SCH80 SCH100 SCH140 SCH160 XS |
| Wall Thickness | 1.65mm-80mm or customized |
| Length | 5.8m 6m fixed 12m fixed 2-12m random or customized |
| Surface | Galvanized |
| Place of Origin | China |
| Certificate | ISO9001 BV SGS RoHS |
Technical Features
- ASTM grades A36 A53 Gr. A Gr B A106 GR.A GR.B A333 GR1 GR3 GR6
- JIS grades SS330 SS440 SS490 SPHD SPHE
- EN BS grades S185 S235 S235JR S235 G2H S275 S275JR S355JRH S355J2H
- Outside dimension 1/2 inch to 48 inch from 21.3mm or customized
- Wall schedules SCH5S SCH10S SCH20S SCH20 SCH30 STD SCH40 SCH60 SCH80 SCH100 SCH140 SCH160 and XS
- Wall thickness range 1.65mm to 80mm or customized
- Lengths 5.8m and 6m fixed 12m fixed or 2-12m random
- Zinc coated surface supplied galvanized
Materials
- Carbon steel strip in ASTM A36 A53 A106 and A333 grades
- Structural steel in JIS SS330 SS440 SS490 SPHD and SPHE
- European structural grades S185 through S355J2H
- Zinc coating applied over the formed section
Certification
- ISO9001
- BV
- SGS
- RoHS
- Mill test certificate supplied with the shipment
Manufacturing
How It Is Made and Processed
Strip decoiling to the width needed for the rectangular section
Roll forming and welding into hollow section
Sizing and shaping to the rectangular profile
Galvanizing to apply the zinc coating
Cutting to 5.8m 6m 12m fixed or 2-12m random length
End finishing and straightness check
Bundling strapping and loading for export
Quality Control
Checks Before It Ships
- Grade confirmed against the ordered ASTM JIS or EN BS designation
- Wall thickness checked against the ordered schedule within the 1.65mm-80mm range
- Section dimensions and squareness checked after sizing
- Zinc coated surface inspected for continuity and bare patches
- Cut lengths verified against the ordered 5.8m 6m 12m or 2-12m bundle
- Bundle count and strapping checked before loading
Customization
What We Can Change on Your Order
- Outside dimensions produced to your section size rather than a stock list
- Wall thickness selected across the 1.65mm to 80mm range
- Cut lengths set to your module instead of 5.8m or 6m fixed
- Grade selected from the ASTM JIS or EN BS family your drawing uses
- Bundle size and strapping arranged for your unloading equipment
Comparison
Galvanized Rectangle Pipe Against the Alternatives
| Black painted rectangle pipe | The zinc coating stays on cut edges and weld heat zones far longer than a paint film, so outdoor frames do not need a repaint cycle. |
|---|---|
| Galvanized round tube | Flat faces take bolted brackets, cladding rails and plate welds directly instead of needing a saddle cut or a shaped seat. |
| Hot dip galvanized angle or channel | A closed section resists torsion better at similar weight, which matters for gate frames and cantilevered signage. |
| Aluminium extruded section | Steel section carries higher load for the same wall and is welded with standard shop equipment rather than dedicated aluminium procedures. |
Use Guide
Specifying Handling and Welding Notes
- Order to the fixed length that matches your repeating module so drop is minimized
- Repair the zinc coating at site cuts and weld zones before the frame is exposed
- Check the wall schedule against the ordered dimension since SCH numbers change wall with size
- State whether the drawing follows ASTM JIS or EN BS so the grade is not substituted by assumption
- Seal or drain open ends on outdoor members so water cannot collect inside the section
- Ask for the mill test certificate with the order so the grade is documented for the project file
Questions Buyers Ask
Galvanized Rectangle Pipe FAQ
What wall thicknesses can you supply in galvanized rectangle pipe?
Walls run from 1.65mm to 80mm across the SCH5S to SCH160 and XS range. Non-standard walls are quoted as customized.
Which lengths do you cut to?
5.8m and 6m fixed are the usual container friendly lengths, 12m fixed is available for long span members, and 2-12m random is supplied where short pieces are usable.
Can you supply to a European grade rather than ASTM?
Yes. S185, S235, S235JR, S235 G2H, S275, S275JR, S355JRH and S355J2H are quoted alongside the ASTM and JIS grade families.
What section sizes are available?
Sections are quoted from 21.3mm upward across the 1/2 inch to 48 inch range, and dimensions outside that list are produced as customized.
Do we need to touch up the galvanizing after welding?
Yes. Welding burns the zinc back around the joint, so repair the coating at welds and at any site cut before the frame goes into service.
How is the material packed for export?
Sections are bundled and strapped for container loading. Tell us your unloading equipment and the bundle weight is set to suit it.
Which certificates come with the shipment?
Material is supplied against ISO9001, BV, SGS and RoHS certification, and the mill test certificate ships with the order when requested.
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