Welded Stainless Steel Square Pipe
Longitudinally welded square hollow section in austenitic duplex and ferritic stainless grades
Specifications
Stainless Steel Pipe, Steel Pipe
Welded Stainless Steel Rectangular Hollow Section
Rectangular hollow section that puts the deeper wall where the bending load acts
Welded stainless steel rectangle pipe is a rectangular hollow section roll formed from stainless strip and closed with a longitudinal weld, produced against EN10216, ASTM A312 or JIS G3463 in grades from 201 and 202 up to 316Ti, 2205 and 904L. Structural steelwork detailers, transport body builders and process equipment shops specify the rectangular profile when a member carries bending in one plane and a square or round section would waste metal to achieve the same depth. Making the section to your dimensions rather than picking the nearest catalogue size keeps the frame weight and the material spend where the load actually is. Orders start at 1 ton and a free sample can be released first if the grade has to be verified.
- Product Name — Welded Stainless Steel Rectangle Pipe
- Section Shape — Rectangular hollow section
- Technique — Welded
- Standard — EN10216 ASTM A312 JIS G3463
- Material Grades — 201 202 301 304 304L 309S 310S 316 316Ti 316L 410 430 2205 904L
Why It Is Specified
Key Benefits of Welded Stainless Steel Rectangle Pipe
Depth Where the Bending Moment Is
A rectangular section carries more bending about its major axis than a square section of the same perimeter. Spans can be held with less metal in the frame.
Made to Your Section Rather Than a Catalogue
Width, depth and wall thickness are customized. You detail the member the structure needs instead of redrawing around what a stockist happens to hold.
Full Stainless Grade Spread Including Duplex
201, 202, 301, 304, 304L, 309S, 310S, 316, 316Ti, 316L, 410, 430, 2205 and 904L are all available. Heat resistant 309S and 310S and chloride resistant 2205 sit in the same order as the general purpose grades.
Two Wide Faces for Cladding and Panels
The long faces give a generous landing for panel edges, gaskets and fixing plates. Cladding and infill details get simpler than they are on round tube.
Standard Nominated by You
The section can be supplied to EN10216, ASTM A312 or JIS G3463 so European, American and Japanese drawings are all buildable from the same supply.
Certification Set Covering ISO9001 BV SGS and RoHS
The stated certification covers ISO9001, BV, SGS and RoHS. Ask for the mill test certificate so the grade is traceable in the project file.
Problems It Solves
What This Material Removes From Your Process
Over Heavy Frames Built From the Nearest Stock Size
When only catalogue sizes are available a detailer rounds up and carries the extra weight for the life of the structure. A customized section lets the member match the calculated depth.
Carbon Steel Frames That Need Repainting
Painted carbon rectangular tube fails first at welds, cut ends and fixing holes. A stainless section removes the repaint cycle from the maintenance plan.
Scaling on Frames Near Heat Equipment
304 loses surface integrity around furnaces and hot process equipment. 309S and 310S are available in the same rectangular section so the hot zone members can be upgraded alone.
Buying Blind Across a Long Shipping Route
A free sample can be released and minimum order is 1 ton, so a first time buyer can assess the weld seam and finish before committing a container.
Application Scenarios
Where It Is Used
Structural Frames and Portal Members
Rectangular members used as beams and posts in stainless framework where painting a carbon steel frame is not acceptable.
Vehicle and Trailer Body Frames
Chassis rails, side frames and tail lift supports on tankers, food trucks and specialist bodies built in 304 or 316L.
Process Skid and Platform Supports
Skid bases, walkway stringers and pump platform frames in chemical and pharmaceutical plants.
Signage Canopy and Facade Substructures
Rectangular members carrying cladding panels, signage boxes and canopy soffits on building frontages.
Furnace and Heat Equipment Frames
309S and 310S members around heat treatment and furnace equipment where ordinary austenitic grades scale.
Conveyor and Material Handling Structures
Side frames and leg assemblies for conveyors handling wet, acidic or food grade product.
Who It Is For
Buyers Who Specify This Product
- Structural detailers buying stainless rectangular members for exposed frames and walkways
- Truck and trailer body builders buying 304 and 316L chassis and side rails
- Process skid builders buying frame sections for pump and dosing packages
- Facade and signage contractors buying substructure members for cladding and canopies
- Heat treatment equipment makers buying 309S and 310S sections for furnace surrounds
- Distributors buying to drawing sizes their regional fabricators repeatedly ask for
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 | Welded Stainless Steel Rectangle Pipe |
|---|---|
| Section Shape | Rectangular hollow section |
| Technique | Welded |
| Standard | EN10216 ASTM A312 JIS G3463 |
| Material Grades | 201 202 301 304 304L 309S 310S 316 316Ti 316L 410 430 2205 904L |
| JIS Designations | SUS304 SUS304L SUS321 SUS316 SUS316L SUS309S SUS310S |
| EN Material Numbers | 1.4372 1.4373 1.4301 1.4833 1.4845 1.4401 1.4571 1.4404 |
| Size | Customized |
| Delivery | Within 7-10 working days after receiving the deposit or according to order quantity |
| Minimum Order | 1 ton or free sample |
| Certification | ISO9001 BV SGS RoHS |
| Price Term | TT or LC |
| Place of Origin | China |
Technical Features
- Rectangular hollow section formed from stainless strip and longitudinally welded
- Standards EN10216 ASTM A312 and JIS G3463
- Grades 201 202 301 304 304L 309S 310S 316 316Ti 316L 410 430 2205 and 904L
- JIS designations SUS304 SUS304L SUS321 SUS316 SUS316L SUS309S and SUS310S
- EN material numbers 1.4301 1.4372 1.4373 1.4401 1.4404 1.4571 1.4833 and 1.4845
- Width depth wall thickness and length customized
- Minimum order 1 ton or free sample
- Certification ISO9001 BV SGS and RoHS
Materials
- General purpose austenitic 304 304L 316 316L and stabilized 316Ti
- Heat resistant austenitic 309S and 310S for elevated temperature frames
- Chromium manganese 201 and 202 for cost driven indoor structures
- Ferritic 430 and martensitic 410 for dry service and wear facing details
- Duplex 2205 and super austenitic 904L for aggressive chloride environments
Certification
- ISO9001
- BV
- SGS
- RoHS
Manufacturing
How It Is Made and Processed
decoiling coil to the strip width calculated for the rectangular profile
Roll forming the strip through the breakdown and fin passes
Longitudinal welding of the closing seam
Sizing through Turks head rolls to the ordered width and depth
Straightening and cutting to the ordered length
Surface finishing end deburring and marking
Bundling with edge protection for container export
Quality Control
Checks Before It Ships
- Grade checked against the nominated EN ASTM or JIS designation
- Weld seam inspected along the full length before cutting
- Width depth and corner radius measured against the ordered section
- Wall thickness sampled through the production run
- Straightness and cut length verified at final inspection
- Bundle count and marking reconciled with the packing list
Customization
What We Can Change on Your Order
- Rectangular section width depth and wall thickness made to your detail
- Cut lengths supplied against your member schedule
- Grade nominated per member including 309S 310S 2205 and 904L
- Standard supplied as EN10216 ASTM A312 or JIS G3463
- Free sample before the first production order
- Bundle sizes and marking arranged for site delivery
Comparison
Welded Stainless Steel Rectangle Pipe Against the Alternatives
| Square hollow section of equal perimeter | The rectangular profile puts more material away from the neutral axis in the loaded plane, so it holds a longer span for the same weight of steel. |
|---|---|
| Painted carbon steel rectangular tube | Corrosion resistance comes from the alloy rather than a paint film, so drilled holes, cut ends and weld zones do not start the failure. |
| Seamless stainless rectangle pipe | The welded section is strip formed rather than pierced and drawn, which suits structural duty at a lower conversion cost. |
| Stainless channel or angle | A closed rectangular section resists torsion far better than an open profile and gives no internal ledge for product or water to sit on. |
Use Guide
Specifying Handling and Welding Notes
- Orient the deeper dimension in the plane of the bending load when detailing the member
- Place the weld seam on the compression face or the concealed face depending on whether load or appearance governs
- Use matching stainless filler and control heat input so distortion in the long faces stays manageable
- Passivate weld zones on food transport and process frames before the equipment goes into service
- Keep stainless sections off carbon steel racking and use stainless or nylon slings during handling
- Send the member schedule with depth width wall and length so sections arrive ready to fit
Questions Buyers Ask
Welded Stainless Steel Rectangle Pipe FAQ
Can you roll a rectangular section that is not on a standard size list?
Yes. Size is customized, so give the outside width, depth, wall thickness and length and the section is produced to those dimensions.
Which grade should we use for a food truck body frame?
304 covers most body frames and 316L is the usual choice where the body is washed with chloride bearing cleaners or works near coastal roads.
Do you have heat resistant grades in rectangular section?
309S and 310S are both in the grade range and are the normal choice for frames close to furnaces or hot process equipment.
What does the order have to be worth to start production?
Minimum order is 1 ton. A free sample can be issued separately if you want to see the material before ordering.
How long from deposit to shipment?
Within 7-10 working days after the deposit is received, or according to the quantity if the order is larger.
Which standard will appear on the paperwork?
Whichever of EN10216, ASTM A312 or JIS G3463 you nominate on the order. Ask for the mill test certificate so the grade is recorded.
Can rectangle and square sections ship on the same order?
Yes. Different section shapes and grades can be combined in one shipment as long as the total reaches the minimum order.
Same Range
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