[Back]Home > Products > Seamless Carbon Steel Pipe > Structural Steel Pipe

Structural Steel Pipe

Pipe Type: Structural Pipe, Structural Seamless Pipe, Seamless Structural Pipe
Application: In Structural Engineering and Construction Industry

Specification: OD: 1/8'' ~ 26'' (10.3 ~ 660mm)

                          WT: SCH 10 ~ 160, SCH STD, SCH XS, SCH XXS

                          LENGTH: Fixed Length (5.8/6/11.8/12mtr), SRL, DRL

Standard: ASTM A53/A252/A500/A501, JIS G3444, EN 10210/10219

Ends: Square Ends/Plain Ends (straight cut, saw cut, torch cut), Beveled/Threaded Ends

Surface: Bare, Lightly Oiled, Black/Red/Yellow Painting, Zinc/Anti-corrosive Coating

Packing: Bundled/In Bulk, Plastic Caps Plugged, Waterproof Paper Wrapped

               

 Structural Steel Pipe Manufacturing Process 

seamless steel pipe manufacturing process


 Specification of Structural Steel Pipe 

API 5L/ASTM A106 GR.B, Structural Steel Pipe
公称通径
DN 		外径OD(mm) SCH40(6m/5.8m) SCH40(6m/5.8m) SCH40(6m/5.8m)
壁厚WT 壁厚WT 壁厚WT
(mm) (mm) (mm)
1/4'' 13.7 2.24 3.02 /
3/8'' 17.1 2.31 3.2 /
1/2'' 21.3 2.77 3.73 4.78
3/4'' 26.7 2.87 3.91 5.56
1'' 33.4 3.38 4.55 6.35
1-1/4'' 42.2 3.56 4.85 6.35
1-1/2'' 48.3 3.68 5.08 7.14
2'' 60.3 3.91 5.54 8.74
2-1/2'' 73 5.16 7.01 9.53
3'' 88.9 5.49 7.62 11.13
3-1/2'' 101.6 5.74 8.08 /
4'' 114.3 6.02 8.56 13.49
5'' 141.3 6.55 9.53 15.88
6'' 168.3 7.11 10.97 18.26
8'' 219.1 8.18 12.7 23.01
10'' 273 9.27 15.09 28.58
12'' 323.8 10.31 17.48 33.32
14'' 355.6 9.53 11.13 19.05
16'' 406.4 9.53 12.7 21.44
18'' 457 9.53 14.27 23.83
20'' 508 9.53 15.09 26.19
24'' 610 9.53 17.48 30.96

 Structural Steel Pipe Chemical Composition and Mechanical Properties 

Standard Grade Chemical Composition (%)
 Mechanical Properties
ASTM A53 C
 Si
 Mn
 P
 S
 Tensile STrength(Mpa)
 Yield STrength(Mpa)
A ≤0.25
 - ≤0.95
 ≤0.05
 ≤0.06
 ≥330
 ≥205
B ≤0.30
 - ≤1.2
 ≤0.05
 ≤0.06
 ≥415
 ≥240
ASTM A106 A
 ≤0.30
 ≥0.10
 0.29-1.06
 ≤0.035
 ≤0.035
 ≥415
 ≥240
B
 ≤0.35
 ≥0.10
 0.29-1.06
 ≤0.035
 ≤0.035
 ≥485
 ≥275
ASTM A179 A179 0.06-0.18
 - 0.27-0.63
 ≤0.035
 ≤0.035
 ≥325 ≥180
ASTM A192 A192 0.06-0.18
 ≤0.25
 0.27-0.63
 ≤0.035
 ≤0.035
 ≥325
 ≥180
API 5L PSL1 A 0.22
 - 0.90
 0.030
 0.030
 ≥331
 ≥207
B
 0.28
 - 1.20 0.030
 0.030
 ≥414
 ≥241
X42
 0.28
 - 1.30 0.030
 0.030
 ≥414
 ≥290
X46
 0.28
 - 1.40 0.030
 0.030
 ≥434
 ≥317
X52
 0.28
 - 1.40
 0.030
 0.030
 ≥455
 ≥359
X56
 0.28
 - 1.40
 0.030
 0.030
 ≥490
 ≥386
X60
 0.28
 - 1.40
 0.030
 0.030
 ≥517
 ≥448
X65
 0.28
 - 1.40
 0.030
 0.030
 ≥531
 ≥448
X70
 0.28
 - 1.40
 0.030
 0.030
 ≥565
 ≥483
API 5L PSL2 B
 0.24
 - 1.20
 0.025
 0.015
 ≥414
 ≥241
X42
 0.24
 - 1.30
 0.025
 0.015
 ≥414
 ≥290
X46
 0.24
 - 1.40
 0.025
 0.015
 ≥434
 ≥317
X52
 0.24
 - 1.40
 0.025
 0.015
 ≥455
 ≥359
X56
 0.24
 - 1.40
 0.025
 0.015
 ≥490
 ≥386
X60
 0.24
 - 1.40
 0.025
 0.015
 ≥517
 ≥414
X65
 0.24
 - 1.40
 0.025
 0.015
 ≥531
 ≥448
X70
 0.24
 - 1.40
 0.025
 0.015
 ≥565
 ≥483
X80
 0.24
 - 1.40
 0.025
 0.015
 ≥621
 ≥552


 Structural Steel Pipe Chemical Composition and Mechanical Properties 

Standard
 Grade
 Chemical Composition
 Mechanical Properties
C
 Si
 Mn
 P S Cr
 Ni
 Cu
 Tensile Strength(Mpa)
 Yield Strength(Mpa)
 Elongation(%)
GB/T8163
 10
 0.07-0.14
 0.17-0.37
 0.35-0.65
 ≤0.035
 ≤0.035
 ≤0.15
 ≤0.25
 ≤0.25
 335-457
 ≥205
 ≥24
20 0.17-0.24
 0.17-0.37
 0.35-0.65
 ≤0.035
 ≤0.035
 ≤0.25
 ≤0.25
 ≤0.25
 410-550
 ≥245
 ≥20
Q345
 0.12-0.20
 0.20-0.55
 1.20-1.60
 ≤0.045
 ≤0.045
 - - - 490-665
 ≥325
 ≥21

 Structural Steel Pipe Tolerance 
Pipe types
 Pipe Szie(mm)
 Tolerances
Hot rolled
 OD
 All
 ±1% (min ±0.50mm)
WT
 All
 +15%, -12.5%
Cold drawn
 OD 6～10
 ±0.20mm
10～30
 ±0.40mm
30～50
 ±0.45mm
>50
 ±1%
WT ≤1
 ±0.15mm
>1～3
 +15% -10%
>3
 +12.5% -10%

 Structural Steel Pipe End 
Plain End Wall Thickness less than 0.5 inch, including SCH STD & SCH XS
Plain End (Square Cut) Wall Thickness over 0.5 inch, including SCH XXS
Beveled End Wall Thickness less than 0.5 inch, including SCH STD & SCH XS 
Couplings Outside Diameter equal or less than 2''
Thread Protection Outside Diameter over 4 inch

 Surface of Structural Steel Pipe 

Bare, Lightlyed, Black/Re Oild/Yellow Painting, Zinc/Anti-corrosive Coating

 Packing of Structural Steel Pipe 

Bundled/In Bulk, Plastic Caps Plugged, Waterproof Paper Wrapped

  Product Advantages of Structural Steel Pipe 

We can produce all sizes of structural pipes, according to European, Chinese, American, Japanese standard. With fast delivery time, supportive payment term.

All tubes production processes are controlled strictly, with high level of quality requirement, all tubes are inspection before delivery, and also accept third party inspection before delivery.


 Structural Steel Pipe Classification and Application 
Types Application
Structure Purposes
 		General structure and mechanical
Liquid Services
 		Petroleum, gas and other fluids conveying
Low and Medium Pressure
 		Steam and boiler manufacturing
Hydraulic Pillar Service
 		Hydraulic support
Auto Semi-shaft Casing
 		Auto sem-shaft casing
Line Pipe
 		Oil and gas conveying
Tubing and Casing
 		Oil and gas conveying
Drill Pipes
 		Well drilling
Geological Drilling Pipe
 		Geological drilling
Petroleum Cracking Tubes
 		Furnace tubes, heat exchangers