The process of Ssaw steel pipe:
Steel coils→Ray material test → Delivery straightening → Plate cutting and welding → circle shear edge milling → Forming → inside auto-welding → Outside auto-welding → Online ultrasonic inspection → Fixed length cutting → Visual inspection for outside seam → Visusl inspection for inside seam → X-ray inspection for welding seam → Even end and end bevel → Hydrostatic test → Ultrasonic inspection → Final product inspection → Marking → Store up
STANDARD OF SSAW STEEL PIPE
Steel coils→Ray material test → Delivery straightening → Plate cutting and welding → circle shear edge milling → Forming → inside auto-welding → Outside auto-welding → Online ultrasonic inspection → Fixed length cutting → Visual inspection for outside seam → Visusl inspection for inside seam → X-ray inspection for welding seam → Even end and end bevel → Hydrostatic test → Ultrasonic inspection → Final product inspection → Marking → Store up
STANDARD OF SSAW 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 |
PSL 1 VS. PSL 2 SPEC SHEET
PSL 1
PSL 2
Grade range
A25 through X70
GR B through X80
Table 1
Size range
0.405 through 80
4-2/1 through 80
Table 1
Type of pipe ends
Plain-end, threaded-end, bevelled-end,
special coupling pipe
Plain-end
Table 1
Seam welding
All methods continous welding limited to
Grade A25
All methods except continous and laser
welding
Table 1
Electric welds: welder frequency
No minimum
100 kHz minimum
5.1.3.3.2
Heat treatments of electric welds
Required for grades > X42
Required for all grades (GR B through
X80)
5.1.3.3.1; J.3.3.2:6.2.7
Chemistry: max C for seamless pipe
0.28% for grades > Gr B
0.24%
Tables 2A, 2B
Chemistry: max C for welded pipe
0.26% for grades > Gr B
0.22%
Tables 2A, 2B
Chemistry: max P
0.03%
0.03%
Tables 2A, 2B
Chemistry: max S
Only when purchases specifies SR18
0.02%
Tables 2A, 2B
Carbon equivalent
None
Maximum required for each grade
4.2:4.3:6.1.3: SR15.1
Yield strength, maximum
None
Maximum for each grade
Tables 3A, 3B
UTS, maximum
None required
Maximum for each grade
Tables 3A, 3B
Fracture toughness
Only when purchaser specifies SR4
Required for all grades
6.2.6; 9.3.5: 9.8.4; 9.10.7;
Non-destructive inspection of seamless
pipes
Permitted
SR4 mandatory
Table 14 9.7.2.6
Repare by welding of pipe body, plate and
skelp
Permitted by agreement
Prohibited
5.3.2;9.7.6: B.1;B.2
Certification
Certificates when specified per SR15
Prohibited
4.3;9.7.4.4;9.7.6;B.1.2;B.4
Traceability
Traceable only until all tests are passed
unless SR15 is specified
Certificates (SR15.1) mandatory
12.1
Traceable after completion of tests (SR15.2) mandatory
5.6
Notes:
*PSL1 & PSL2 requirements are given in the latest edition of API 5L specifications
Classfication |
Standard |
Main Products |
Steel Pipe for Fluid Service |
GB/T 14291 |
Welded pipe for mine fluid sevice |
GB/T 3091 |
Welded pipe for low pressure fluid service |
|
SY/T 5037 |
Spirally submerged arc welded steel pipe for pipelines for low pressure fluid service |
|
ASTM A53 |
Black and hot-hipped galvanized welded and seamless steel pipe |
|
BS EN10217-2 |
Welded steel tybes for pressure purposes - delivery technical conditions - part2: Electric welded non- alloy and alloy steel tubes with specified elevated temperature properties |
|
BS EN10217-5 |
Welded steel tybes for pressure purposes - delivery technical conditions - part5: submerged arc welded non-alloy and alloy steel tubes with specified elevated temperature properties |
|
Steel Pipe for Ordinary Structure |
GB/T 13793 |
Longitudinally electric resistance welded steel pipe |
SY/T 5040 |
Spirally submerged arc welded steel pipe piles |
|
ASTM A252 |
Welded and seamless steel pipe piles |
|
BS EN10219-1 |
Cold formed welded structural hollow sections of non-alloy and fine grain steels - part1: Technical delivert conditions |
|
BS EN10219-2 |
Cold formed welded structural hollow sections of non-alloy and fine grain steels - part2: tolerances dimmsions and sectional properties |
|
Line Pipe |
GB/T 9711.1 |
Steel pipe for pipeline transportation system of petroleum and natural gas industries(Class A steel pipe) |
GB/T 9711.2 |
Steel pipe for pipeline transportation system of petroleum and natural gas industries(Class A steel pipe) |
|
API 5L PSL 1/2 |
Line pipe |
|
Casing |
API 5CT/ ISO 11960 PSL1 |
Steel pipe for use as casing or tubing for wells of petroleum and natural gas industries |