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Metal Building Materials Black Square And Rectangular Carbon Steel Tube
Square pipe is a name for square pipe and rectangular pipe, that is, steel pipe with equal and unequal side length. 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 from the round pipe, and then cut into the required length.Square tube is used in construction, machinery manufacturing, steel construction projects, shipbuilding, solar power generation support, steel structure engineering, power engineering, power plants, agricultural and chemical machinery, glass curtain walls, automobile chassis, airports, boiler construction, highway railings, housing construction, pressure vessels, petroleum storage tanks, bridges, power station equipment, lifting and transportation machinery and other high load welded structural parts, etc.
Spuare Steel Pipe Specification;
| Product name | Square Rectangular Pipes |
| Size | Rectangular Tube: 10*20-120*80mm Square Tube : 16*16-250*250 mm (check sizes provided from below table) |
| Length | 6m or based on your request |
| Standard | EN10210, EN10219, DIN17100, ASTM A36,JIS G3466 |
| Materials | Q195, Q235, Q235B, Q275, Q345B, S235, S235jr, S355, S355jr, SS400, SS330, STK490,St33, St37, St52/ ASTM A36, A53, A106 |
| Surface | Oil, bared, black paint, galvanized |
| End finish | Plain end |
| Technique | Hot rolled, welded(erw) |
| Usage | Civil engineering, architecture, steel towers, shipyard, scaffoldings, struts, piles for suppression of landslide and other structures |
| Packing | Export standard package, suit for all kinds of transport, or as required. |
| Outer Diameter | 1/2”~8” 20~219mm |
| Thickness | 0.8~2.75mm |
| Length | Normal 5.8m, 6m ,random length can be customized |
| Zinc Coating | 40~275g/㎡ |
| Tolerance | OD:+/-0.5mm |
| WT: +/-0.05mm | |
| Length: +/-20mm | |
| Straightness | As Per Standard |
| Material | Q195,Q215,Q235,Q355, Gr.A, Gr.B, S235-JRH,STK400,STK500 |
| Standard | GB/T6728-2016 ,EN10219, ASTM A500, EN10305, AS1163 |
| Certificate | ISO 9001,IS014001,ISO45001,ISO50001,CE,LR,ICC,SGS.BV etc |
| Surface Treatment | Zinc plated ,Passivation, Marking,Embossing |
| Pipe End | Plain end / Blunt end / Screwed and socked & protected by plastic caps |
| Deep Processing | Threaded,sockets,end cap,painting,powder coated, oiled, punching,shrink,woven bag, stamping,embossing ect. |
| Packing | In Bundles, Water Proof Plastic Packing ,in Bulk etc |
| In hexagonal seaworthy bundles packed by steel strips. | |
| small sizes nested into big sizes. | |
| Applications | Steel Structure,Scaffolding,Fence,Conduit,Greenhouse,Decorative pipe, Post, Roofing |
| Techinical | ERW (high - frequency welded) |
| Shipping Port | Xin’gang, China |
| Trade Term | FOB, CFR, CIF, EXW, FCA |
| MOQ | Marketing (normal) Size: 0 MOQ OEM Size: 10 tons for each size |
| Shipment | 20 feet container , the max length 5.85m without coupling, 5.8m with coupling |
| 40 feet container , the max length 12.0m or 6.0m in two rows. | |
| Bulk carrier no limits on pipe length. |
| Square Hollow Section (SHS) | WT (mm) | Rectangular Hollow Section (RHS) | WT (mm) |
| 16*16 | 0.8-1.5 | 20*40 | 0.8-2.0 |
| 19*19 | 0.8-2.0 | 25*50 | 0.8-2.0 |
| 20*20 | 0.8-2.0 | 30*40 | 0.8-2.0 |
| 25*25 | 0.8-2.0 | 30*50 | 0.8-2.0 |
| 30*30 | 0.8-2.0 | 37*57 | 0.8-2.0 |
| 32*32 | 0.8-2.0 | 40*60 | 0.8-2.0 |
| 35*35 | 0.8-2.0 | 37*77 | 0.8-2.0 |
| 38*38 | 0.8-2.0 | 25*75 | 1.0-2.0 |
| 40*40 | 0.8-2.0 | 40*80 | 1.0-2.2 |
| 50*50 | 0.8-2.0 | 50*100 | 1.0-2.2 |
| 60*60 | 1.0-2.2 | 50*75 | 1.0-2.2 |
| 80*80 | 1.0-2.2 | 38*75 | 1.0-2.2 |
| 100*100 | 1.0-2.3 | 50*75 | 1.0-2.2 |
Square Steel Pipe Type:
1. Production process classification of rectangular tube
Rectangular tubes are classified according to the production process: hot-rolled seamless square tubes, cold-drawn seamless square tubes, extruded seamless square tubes, and welded square tubes. Among them, the welded square pipe is divided into: (a) According to the 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 weld-straight Seam welded square pipe, spiral welded square pipe
2. Material classification of rectangular tube
Square pipes are classified according to their materials: plain carbon steel square pipes and low-alloy square pipes. 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.
3. Standard classification of rectangular tube production
Square pipes are classified according to production standards: national standard square pipes, Japanese standard square pipes, imperial square pipes, American standard square pipes, European standard square pipes, and non-standard square pipes.
4. The shape classification of the rectangular tube section
Square pipes are classified according to their cross-sectional shapes: (1) simple cross-section square pipes-square square pipes, rectangular square pipes (2) complex cross-section square pipes-flower-shaped square pipes, open-shaped square pipes, corrugated square pipes, special-shaped square pipes
5. Surface treatment classification of rectangular tube
Square pipes are divided into surface treatments: hot-dip galvanized square pipes, electro-galvanized square pipes, oil-coated square pipes, pickled square pipes
6. Use classification of rectangular tube
Square pipes are classified by purpose-square pipes for decoration, square pipes for machine tools, square pipes for machinery industry, square pipes for chemical industry, square pipes for steel structures, square pipes for shipbuilding, square pipes for automobiles, square pipes for steel beams and columns Tube, special purpose square tube
7. Classification of rectangular tube wall thickness
Rectangular pipes are classified by wall thickness-super thick-walled rectangular pipes, thick-walled rectangular pipes and thin-walled rectangular pipes
Squre Steel Pipe Features:
1. Corrosion resistance: Galvanizing is an economic and effective rust prevention method that is often used. About half of the world's zinc output is used in this process. Not only does zinc form a dense protective layer on the steel surface, but it also has a cathodic protection effect. When the zinc coating is damaged, it can still prevent the corrosion of the iron base material by cathodic protection.
2. Good cold bending and welding performance: mainly used low carbon steel grade, the requirements have good cold bending and welding performance, as well as a certain stamping performance
3. Reflectivity: It has high reflectivity, making it a barrier against heat
4, the coating toughness is strong, galvanized layer forms a special metallurgical structure, this structure can withstand mechanical damage in transport and use.
Square Steel Pipe Packing :
bundles tied with steel trips; In bulk ; With waterproof
