Strip Steel
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Round welded steel pipes, also known as welded pipes, are steel pipes made by welding steel plates or strips after curling and forming, and are generally fixed in length of 6 meters.
Welded square pipes, also known as welded pipes, are square pipes made by welding steel plates or strips after curling.
Process
Welded pipes are formed by hot-rolled coils through a forming machine, which deform the steel coils into a smooth cylindrical shape. The edge of the tube blank is heated and melted by the collection effect and proximity effect of high-frequency current or the arc burning under the flux layer, and finally cooled and formed. Large-diameter or thicker welded pipes are generally made directly from steel billets, while small welded pipes and thin-walled welded pipes only need to be directly welded through steel strips. Then, after simple polishing and wire drawing, it is done.
Raw material uncoiling-leveling-end shearing and welding-loop-forming-welding-removal of internal and external weld beads-pre-correction-induction heat treatment-sizing and straightening-eddy current detection-cutting-water pressure inspection-pickling-final inspection (strict control)-packaging-shipping.
Common materials
Q195, Q235A, Q235B, Q345, 20#, etc.
Round welded steel pipe specification
Outer diameter
Wall thickness
length
MOQ
Packing
Delivery time
20mm;25mm;32mm;40mm;
48mm;60mm;76mm;89mm;
108mm;114mm;133mm;
159mm;165mm;219mm;
1mm-6.25mm
4m-12m or other length for you requirement
30tons
Bundles or bulk
7-30days
Common size
Schedute number
Nominal Size
(inches)
Outer diameter
(mm)
Wall thickness
(mm)
Weight(black pipe)
(kg/m)
40
1/2
21.3
2.77
1.27
40
3/4
26.7
2.87
1.69
40
1
33.4
3.38
2.50
40
1-1/4
42.2
3.56
3.39
40
1-1/2
48.3
3.68
4.05
40
2
60.3
3.91
5.44
40
2-1/2
73.0
5.16
8.63
40
3
88.9
5.49
11.29
40
4
114.3
6.02
16.07
Square welded steel pipe specification specification
Outer diameter
Wall thickness
length
MOQ
Packing
Delivery time
10mm-200mm
0.5mm-9mm
6m-12m or other customized size
30tons
Bundles
Or bulk
7-30days
Common size
Size
(mm)
Length
(m)
Weight
(kg)
Packing
(pcs/bundle)
30×50×1.5
6
1120
104
30×50×1.7
6
1190
104
30×50×1.8
6
1330
104
30×50×2.0
6
1380
104
30×50×2.2
6
1640
104
30×50×2.5
6
1820
104
40×60×1.5
6
910
70
40×60×1.7
6
1030
70
40×60×1.8
6
1095
70
40×60×2.0
6
1200
70
40×60×2.2
6
1274
70
40×60×2.5
6
1480
70
40×40×1.5
6
1088
100
40×40×1.7
6
1226
100
40×40×1.8
6
1300
100
40×40×2.0
6
1431
100
40×40×2.2
6
1566
100
40×40×2.5
6
1766
100
50×50×1.5
6
860
64
50×50×1.7
6
968
64
50×50×1.8
6
1016
64
50×50×2.0
6
1038
64
50×50×2.2
6
1268
64
50×50×2.5
6
1386
64
40×80×1.5
6
830
50
40×80×1.7
6
918
50
40×80×1.8
6
896
50
40×80×2.0
6
1068
50
40×80×2.2
6
1178
50
40×80×2.5
6
1354
50
100×150×4.5
6
1224
12
100×150×4.75
6
1290
12
100×150×5.5
6
1486
12
100×150×5.75
6
1580
12
100×150×7.5
6
1988
12
100×150×7.75
6
2054
12
100×200×4.5
6
986
8
100×200×4.75
6
1040
8
100×200×5.5
6
1980
8
100×200×5.75
6
1248
8
100×200×7.5
6
1610
8
100×200×7.75
6
1660
8
150×200×4.75
6
914
6
150×200×5.5
6
1053
6
150×200×5.75
6
1100
6
150×200×7.5
6
1430
6
150×200×7.75
6
1465
6
150×200×8.5
6
1618
6
150×150×4.5
6
1110
9
150×150×4.75
6
1178
9
150×150×5.5
6
1348
9
150×150×5.75
6
1410
9
150×150×7.5
6
1812
9
150×150×7.75
6
1890
9
Advantages
Welded steel pipes have simple production processes, high production efficiency, a wide variety of specifications, low equipment investment, and low cost.
Applications
Mainly used in agricultural irrigation, urban construction, construction, coal mines, ports, machinery and other industries
For liquid transportation: water supply and drainage.
For gas transportation: coal gas, steam, liquefied petroleum gas.
For structural use: pile pipes, bridges; docks, roads, farmhouses, furniture, scaffolding and other mechanical structures
Welded pipe
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Products Category
Tag list
Welded steel pipe
Welded round steel pipe
Black steel pipe
Spiral welded steel pipe
Black iron round pipe
Square welded steel pipe
Square steel tube
Square black steel pipe
Hollow square steel pipe
Black iron square pipe
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