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Welded square pipe mechanical pipe Seamless square pipe

Short Description:

Square pipe is a name for square pipe and rectangular pipe, that is, steel pipe with equal and unequal side lengths. It is made of rolled strip steel after process treatment. Generally, the strip steel is unpacked, leveled, crimped and welded to form a round pipe, then rolled into a square pipe, and then cut into the required length. Also known as square and rectangular cold-formed hollow section steel, referred to as square tube and rectangular tube, code names are F and J respectively.

Product Detail

Product Tags

Product Description

The allowable deviation of the wall thickness of square pipe shall not exceed plus or minus 10% of the nominal wall thickness when the wall thickness is not greater 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 corner and weld area. The normal delivery length of square rectangular pipe is 4000mm-12000mm, mostly 6000mm and 12000mm. The rectangular tube is allowed to deliver short and non fixed length products not less than 2000mm, or in the form of interface tube, but the Demander shall cut off the interface tube when using it. The weight of short length and non fixed length products shall not exceed 5% of the total delivery volume, and for square moment tubes with theoretical weight greater than 20kg / m, it shall not exceed 10% of the total delivery volume. The bending degree of square rectangular pipe shall not be greater than 2mm per meter, and the total bending degree shall not be greater than 0.2% of the total length.

Product Parameter

Steel pipe grade 20 45 Q345 40cr 42crmo A53 SA53 ST35E235ST37.4 ST45E255 ST52E3551045 S45C gr.50 5120 5140
Lengh 6/12m
Outer Diameter 10*10-500*500 mm
wall thickness 0.5-30mm
Processing Service Cutting/Bending/Punching or according to the customer's demand
Surface Galvanized Coated,black painted
Technology Seamless or with seam
Packaging Details Bare packing/wooden case /waterproof cloth
Terms of Payment T/T L/C at sight
20 feet container contains dimension Length under 6000mm/25T
40 feet container contains dimension Length under 12000mm/27T


Samples Free samples are provided but the freight is paid by the buyer
Min order 5 Ton

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Processing Services




Our company has a large number of inventory, can meet your needs in time.


provide relevant information in time according to the customer's demand to ensure the quantity and quality of products.


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Product Application

For engineering construction, glass curtain wall, door and window decoration, steel structure, guardrail, machinery manufacturing, automobile manufacturing, household appliance manufacturing, shipbuilding, container manufacturing, electric power, agricultural construction, agricultural greenhouse, bicycle frame, motorcycle frame, shelf, fitness equipment, leisure and tourism products, steel furniture, various specifications of oil casing, oil pipe and pipeline pipe, water, gas, sewage Air, heating and other fluid transportation, fire fighting and support, construction industry, etc.

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