Square rectangular pipe is a name for square pipe and rectangular pipe, that is, steel pipes with equal and unequal side lengths. It is made of strip steel by processing and rolling. Generally, the strip is unpacked, flat, crimped, welded to form a round tube, which is then rolled into a square tube and cut to the required length.
Also known as square and rectangular cold-formed hollow steel, referred to as square tube and rectangular tube, code F and J respectively
1. The allowable deviation of the wall thickness of the square rectangular pipe shall not exceed plus or minus 10% of the nominal wall thickness when the wall thickness is less than 10mm, and plus or minus 8% of the wall thickness when the wall thickness is greater than 10mm, except for the wall thickness of the corner and weld area.
2. The usual delivery length of rectangular tubes is 4000mm-12000mm, with 6000mm and 12000mm being the majority. Square pipe allows the delivery of not less than 2000mm short size and non-fixed size products, can also be delivered in the form of interface pipe, but the buyer should cut the interface pipe when in use. The weight of short size and non-fixed size products shall not exceed 5% of the total delivery volume, and for square pipe with a theoretical weight greater than 20kg/m, it shall not exceed 10% of the total delivery volume.
3, the bending of the square tube shall not be greater than 2mm per meter, and the total bending shall not be greater than 0.2% of the total length.
Product Description
| Standard |
ASTM A53, BS1387-85, GB/T3091-08, DIN2440, JIS-G3444, EN10240, EN10255 etc. |
| Grade |
Q195, Q215, Q235, Q345, S235JR, S275JR, STK400, STK500 etc. |
| Type & Zinc Coating |
Hot dip galvanized steel pipe (zinc coating: 60g/m2-275g/m2) |
| Pre-painted galvanized steel pipe (zinc coating: 80g/m2-275g/m2) |
| Outer Diameter |
Round pipe: 17mm-273mm |
| Square pipe: 15mm x 15mm - 400mm x 400mm |
| Rectangular pipe: 10mm x 20mm -200mm x 400mm |
| Wall Thickness |
Round pipe: 0.6mm-12mm |
| Square pipe: 0.6mm-20mm |
| Rectangular pipe: 0.6mm-20mm |
| Length |
Length: 2m-5.8m/6m/12m ( We can adjust length according to your request) |
| Process |
Cold Drawn Tube / Hot Rolled Tube |
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Process classification
Square pipe according to the production process: hot rolled seamless square pipe, cold drawn seamless square pipe, extrusion seamless square pipe, welded square pipe.
Which welded square pipe is divided into
1, according to the process - arc welded square tube, resistance welded square tube (high frequency, low frequency), gas welded square tube, furnace welded square tube
2, according to the weld points - straight seam welded square pipe, spiral welded square pipe.
Material classification
Square pipe according to the material: ordinary carbon steel square pipe, low alloy square pipe.
1, general carbon steel is divided into: Q195, Q215, Q235, SS400, 20# steel, 45# steel, etc.
2, low alloy steel is divided into: Q345, 16Mn, Q390, ST52-3 and so on.
Production standard classification
Square pipe according to production standards: national standard square pipe, Japanese standard square pipe, British square pipe, American standard square pipe, European standard square pipe, non-standard square pipe.
Section shape classification
The square pipe is classified by section shape:
1, simple section square tube: square square tube, rectangular square tube.
2, complex section square tube: flower square tube, open square tube, corrugated square tube, shaped square tube.
Surface treatment classification
Square pipe according to surface treatment: hot galvanized square pipe, electric galvanized square pipe, oil square pipe, pickling square pipe.
Detailed Photos
We can also supply round galvanized steel pipe:
Company Profile
Packaging & Shipping
FAQ
1. Is your samples free?
Yes, we can provide free samples to my clients.
2. How many days will the samples be finished?
Generally the samples will be sent immediately by the air express in 2~3 days if the goods are in stock.
3. And how about the mass production?
Normally within 20-25 days according to your order.
4. Are you a manufacture?
Yes, we have been in providing the products in this field for 15 years.
5. Is customized available?
Yes, we can OEM according to your detailed drawings.
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Audited Supplier 
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