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Factory directly price 30mm ss square steel pipe seamless tube 100×100

Short Description:

Square steel pipe is a kind of name of square pipe, that is, the steel pipe with the same side length.It is made of strip steel after processing. Drawing square pipe: generally, strip steel is unpacked, flat, curled, welded into a round pipe, and then rolled into a square pipe by the round pipe and then cut into the required length.


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Classification of square tube

1. Process classification
Square steel pipe according to the production process: hot rolled seamless square pipe, cold drawn seamless square pipe, extrusion seamless square pipe, welded square pipe.

The welded square pipe can be divided into
(a) By process: arc welding square pipe, resistance welding square pipe (high frequency, low frequency), gas welding square pipe, furnace welding square pipe.
(b) According to the welding line - straight seam welded square pipe, spiral welded square pipe.

2. The material classification
Square steel pipe according to the material: carbon steel square pipe, low alloy square pipe.Common carbon steel is divided into :Q195, Q215, Q235, SS400, 20# steel, 45# steel, etc.Low alloy steel is divided into Q345, 16Mn, Q390, ST52-3, etc.
JIS G3466-88 Japanese general structural rectangular tube fitting range standard can be implemented.

3. Folded section shape classification
Square pipes are classified by section shape
(1) Simple cross section square tube -- square tube, rectangular tube.
(2) Complex cross - section square pipe: flower - shaped square pipe, open - shaped square pipe, corrugated square pipe, shaped square pipe.

4. Folding surface treatment classification
Square steel pipe according to the surface treatment: hot galvanized square pipe, electric galvanized square pipe, oil coated square pipe, pickling square pipe.
Classification of folding USES
Square steel pipes are classified by use -- square pipes for decoration, for machine tools, for mechanical industry, for chemical industry, for steel structure, for shipbuilding, for automobile, for steel beam and column, for special purpose.

5. Folding wall thickness classification
Square pipes are classified by wall thickness - super - thick - wall, thick - wall and thin - wall.

Size Dimension 15*15-500*500mm
Wall Thickness 0.45-20mm
ZINC COATED 1)Pre-galvanized:Z60-200g/m2
2)Hot dip galvanized:Z260-520g/m2
Steel material Q195 → Grade B, SS330,SPHC, S185
Q215 → Grade C,CS Type B,SS330, SPHC
Q235 → Grade D,SS400,S235JR,S235JO,S235J2
Q345 → SS500,ST52
Standard BS1387, EN10297, BS6323, BSEN10217, GB/T13793-1992,
GB/T14291-2006, GB/T3091-1993, GB/T3092-1993,
GB3640-88, ASTM A53/A36, EN39/EN10219, API 5L,
GB/T9711.1-99 etc
Section shape Round/Square/Rectangular
Type Welded Pipe
Technique Electronic Resistance Welded (ERW )
Electronic Fusion Welded (EFW)
Double Submerged Arc Welded (DSAW)
Welded Line Type Longitudinal
Ends 1)Plain
2)Beveled
3)Thread with Coupling or cap
End protector 1) Plastic pipe cap
2) Iron protector
Surface Treatment 1) Bared
2) Black Painted (varnish coating)
3) Galvanized
4) With Oiled
5) 3 PE, FBE, corrosion resistant coating
Inspection With Hydraulic Testing, Eddy Current , Infrared Test
Class A test pressure 4.83MPa-13.10Mpa
Package 1.Big OD:in bulk
2.Small OD:packed by steel strips
3.woven cloth with 7 slats
4.plastic bags
5.as per customer's option
Application construction structure, machinery making, container, hall structure, sun seeker, offshore oil field, sea trestle, motorcar cassis, airport structure, shipbuilding, automobile axle pipe and so on.
Delivery 1) Container
2) Bulk carrier
Port of Shipment Qingdao Port,Tianjin Port, China
Date of Delivery According To The Quantity And Specification Of Each Order
Payment L/C T/T
Addition Special design available according to requirment
Anti-corrosion and high-temperature resistant with black painting
All the production process are made under the ISO9001:2000 strictly

Square tube specifications

Square steel pipe001
Square steel pipe11
Square steel pipe12
Square steel pipe13
Square steel pipe14

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