The process of Lsaw steel pipe:
Plate feeding → Edge Milling and Beveling → Board Probe → Edge Crimping →molding→Slag→Track Pre-Welding → Tab Welding → Inside Welding → Slag → Outside Welding → Tab Removal → Ultrasonic Inspection → X-ray Inspection → Mechanical Expansion → Flame Flat → Hydro-static Testing → Ultrasonic Inspection for pipe end and welding seam → Weld and Pipe End X-ray Inspection → Tube end weld grinding → End Facing and Beveling → Weighing and measuring → Spray paint Marking → Final Inspection → Storage → Storage and Shipment
STANDARD OF LSAW STEEL PIPE
Plate feeding → Edge Milling and Beveling → Board Probe → Edge Crimping →molding→Slag→Track Pre-Welding → Tab Welding → Inside Welding → Slag → Outside Welding → Tab Removal → Ultrasonic Inspection → X-ray Inspection → Mechanical Expansion → Flame Flat → Hydro-static Testing → Ultrasonic Inspection for pipe end and welding seam → Weld and Pipe End X-ray Inspection → Tube end weld grinding → End Facing and Beveling → Weighing and measuring → Spray paint Marking → Final Inspection → Storage → Storage and Shipment
STANDARD OF LSAW STEEL PIPE
Standard |
Grade |
Chemical Composition(%) |
Tensile STrength(min) |
Yield Strength(min) |
||||||
c |
Mn |
P |
S |
Mpa |
Mpa |
|||||
API 5L PSL1 |
A |
0.22 |
0.90 |
0.030 |
0.030 |
335 |
210 |
|||
B |
0.28 |
1.20 |
0.030 |
0.030 |
415 |
245 |
||||
X42 |
0.28 |
1.30 |
0.030 |
0.030 |
415 |
290 |
||||
X46 |
0.28 |
1.40 |
0.030 |
0.030 |
435 |
320 |
||||
X52 |
0.28 |
1. 40 |
0.030 |
0.030 |
460 |
360 |
||||
X56 |
0.28 |
1.40 |
0.030 |
0.030 |
490 |
390 |
||||
X60 |
0.28 |
1.40 |
0.030 |
0.030 |
520 |
415 |
||||
X65 |
0.28 |
1.40 |
0.030 |
0.030 |
535 |
450 |
||||
X70 |
0.28 |
1.40 |
0.030 |
0.030 |
570 |
485 |
||||
Standard |
Grade |
Chemical Composition(%) |
Tensile STrength |
Yield Strength |
||||||
c |
Mn |
P |
S |
Mpa |
Mpa |
|||||
API 5L PSL2 |
B |
0.24 |
1.20 |
0.025 |
0.015 |
415-655 |
245-450 |
|||
X42 |
0.24 |
1.30 |
0.025 |
0.015 |
415-655 |
290-495 |
||||
X46 |
0.24 |
1.40 |
0.025 |
0.015 |
435-655 |
320-525 |
||||
X52 |
0.24 |
1. 40 |
0.025 |
0.015 |
460-760 |
360-530 |
||||
X56 |
0.24 |
1. 40 |
0.025 |
0.015 |
490-760 |
390-545 |
||||
X60 |
0.24 |
1. 40 |
0.025 |
0.015 |
520-760 |
415-565 |
||||
X65 |
0.24 |
1.40 |
0.025 |
0.015 |
535-760 |
450-600 |
||||
X70 |
0.24 |
1.40 |
0.025 |
0.015 |
570-760 |
485-635 |
||||
X80 |
0.24 |
1. 40 |
0.025 |
0.015 |
625-825 |
555-705 |
Standard |
Grade |
Chemical Composition(%) |
Tensile STrength(min) |
Yield Strength(min) |
||||||
c |
Mn |
P |
S |
Mpa |
Mpa |
|||||
API 5L PSL1 |
A |
0.22 |
0.90 |
0.030 |
0.030 |
335 |
210 |
|||
B |
0.28 |
1.20 |
0.030 |
0.030 |
415 |
245 |
||||
X42 |
0.28 |
1.30 |
0.030 |
0.030 |
415 |
290 |
||||
X46 |
0.28 |
1.40 |
0.030 |
0.030 |
435 |
320 |
||||
X52 |
0.28 |
1. 40 |
0.030 |
0.030 |
460 |
360 |
||||
X56 |
0.28 |
1.40 |
0.030 |
0.030 |
490 |
390 |
||||
X60 |
0.28 |
1.40 |
0.030 |
0.030 |
520 |
415 |
||||
X65 |
0.28 |
1.40 |
0.030 |
0.030 |
535 |
450 |
||||
X70 |
0.28 |
1.40 |
0.030 |
0.030 |
570 |
485 |
||||
Standard |
Grade |
Chemical Composition(%) |
Tensile STrength |
Yield Strength |
||||||
c |
Mn |
P |
S |
Mpa |
Mpa |
|||||
API 5L PSL2 |
B |
0.24 |
1.20 |
0.025 |
0.015 |
415-655 |
245-450 |
|||
X42 |
0.24 |
1.30 |
0.025 |
0.015 |
415-655 |
290-495 |
||||
X46 |
0.24 |
1.40 |
0.025 |
0.015 |
435-655 |
320-525 |
||||
X52 |
0.24 |
1. 40 |
0.025 |
0.015 |
460-760 |
360-530 |
||||
X56 |
0.24 |
1. 40 |
0.025 |
0.015 |
490-760 |
390-545 |
||||
X60 |
0.24 |
1. 40 |
0.025 |
0.015 |
520-760 |
415-565 |
||||
X65 |
0.24 |
1.40 |
0.025 |
0.015 |
535-760 |
450-600 |
||||
X70 |
0.24 |
1.40 |
0.025 |
0.015 |
570-760 |
485-635 |
||||
X80 |
0.24 |
1. 40 |
0.025 |
0.015 |
625-825 |
555-705 |
DIMENSION TOLERANCES OF LSAW STEEL PIPE
Standard |
Standard |
|||||
SY/T5040-2000 |
Y/T5037-2000 |
SY/T9711.1-197 |
ASTM A252 |
AWWA C200-9 |
API 5L PSL1 |
|
Tube end OD deviation |
± 0.5%D |
± 0.5%D |
-0.79mm~+2.38 |
<± 0.1%T |
<± 0.1%T |
± 1.6mm |
Wall thickness |
± 10.0%T |
D<508mm, ±12.5%T |
- 8%T~+19.5%T |
<- 12.5%T |
-8%T~+19.5%T |
5.0mm |
D>508mm, ±10.0%T |
T≥15.0mm, ±1.5m |
SPECIFICATIONS OF LSAW STEEL PIPE