Home > Products >

seamless line pipe VS welded steel line pipe

TPCO

 

API 5L Seamless Line Pipe

API 5L Seamless Line Pipe
This Standard specifies requirements for the manufacture of two product specification levels (PSL 1 and PSL 2) of seamless and welded steel pipes for use in pipeline transportation systems in the petroleum and natural gas industries.
Application of API 5L Seamless Line Pipe:
For conveying gas,water and oil either in the oil or natural gas industries.
Main Steel Grade of API 5L Seamless Line Pipe:
B,X42,X46,X52,X56,X60,X65,X70,X80
Pipe type of API 5L Seamless Line Pipe:
HFW、SAWL,SAWH,SMLSSize of API 5L Seamless Line Pipe:

 

  • HFW(1.315in～26.000″)
  • SMLS(1.315in～28.000″)
  • SAWH(8.625in～84.000″)
  • SAWL(16.000in～56.000″)

 

Chemical Analysis(%) of API 5L Seamless Line Pipe:
Class Grade
C
Si
Mn
P
S
V
Nb
Ti
CEIIW
CPcm
max
PSL1 B
0.28(aim 0.20)
/
1.20
0.030(aim 0.025)
0.030(aim0.020)
0.15
0.15
0.15
/
/
X42
0.28(aim 0.20)
/
1.30
0.030(aim 0.025)
0.030(aim 0.020)
0.15
0.15
0.15
/
/
X46
0.28(aim 0.20)
/
1.40
0.030(aim 0.025)
0.030(aim 0.020)
0.15
0.15
0.15
/
/
X52
0.28(aim 0.20)
/
1.40
0.030(aim 0.025)
0.030(aim 0.020)
0.15
0.15
0.15
/
/
X56
0.28(aim 0.20)
/
1.40
0.030(aim 0.025)
0.030(aim 0.020)
0.15
0.15
0.15
/
/
X60
0.28(aim 0.20)
/
1.40
0.030(aim 0.025)
0.030(aim 0.020)
0.15
0.15
0.15
/
/
X65
0.28(aim 0.20)
/
1.40
0.030(aim 0.025)
0.030(aim 0.020)
0.15
0.15
0.15
/
/
X70
0.28(aim 0.20)
/
1.40
0.030(aim 0.025)
0.030(aim 0.020)
0.15
0.15
0.15
/
/
PSL2 BN
0.24(aim 0.18)
0.40
1.20
0.025(aim 0.020)
0.015(aim 0.010)
0.06
0.06
0.04
0.43
0.25
X42N
0.24(aim 0.18)
0.40
1.20
0.025(aim 0.020)
0.015(aim 0.010)
0.06
0.05
0.04
0.43
0.25
X46N
0.24(aim 0.18)
0.40
1.40
0.025(aim 0.020)
0.015(aim 0.010)
0.07
0.05
0.04
0.43
0.25
X52N
0.24(aim 0.18)
0.45
1.40
0.025(aim 0.020)
0.015(aim 0.010)
0.10
0.05
0.04
0.43
0.25
X56N
0.24(aim 0.18)
0.45
1.40
0.025(aim 0.020)
0.015(aim 0.010)
0.10
0.05
0.04
0.43
0.25
X60N
0.24(aim 0.18)
0.45
1.40
0.025(aim 0.020)
0.015(aim 0.010)
0.10
0.05
0.04
as agreed
BQ
0.18(aim 0.14)
0.45
1.40
0.025(aim 0.020)
0.015(aim 0.010)
0.05
0.05
0.04
0.43
0.25
X42Q
0.18(aim 0.14)
0.45
1.40
0.025(aim 0.020)
0.015(aim 0.010)
0.05
0.05
0.04
0.43
0.25
X46Q
0.18(aim 0.14)
0.45
1.40
0.025(aim 0.020)
0.015(aim 0.010)
0.05
0.05
0.04
0.43
0.25
X52Q
0.18(aim 0.14)
0.45
1.50
0.025(aim 0.020)
0.015(aim 0.010)
0.05
0.05
0.04
0.43
0.25
X56Q
0.18(aim 0.14)
0.45
1.50
0.025(aim 0.020)
0.015(aim 0.010)
0.07
0.05
0.04
0.43
0.25
X60Q
0.18(aim 0.14)
0.45
1.70
0.025(aim 0.020)
0.015(aim 0.010)
0.15
0.15
0.15
0.43
0.25
X65Q
0.18(aim 0.14)
0.45
1.70
0.025(aim 0.020)
0.015(aim 0.010)
0.15
0.15
0.15
0.43
0.25
X70Q
0.18(aim 0.14)
0.45
1.80
0.025(aim 0.020)
0.015(aim 0.010)
0.15
0.15
0.15
0.43
0.25
BNS
0.14(aim 0.10)
0.40
1.35
0.020(aim 0.015)
0.003
0.06
0.06
0.04
0.36
0.19
X42NS
0.14(aim 0.10)
0.40
1.35
0.020(aim 0.015)
0.003
0.05
0.05
0.04
0.36
0.19
X46NS
0.14(aim 0.10)
0.40
1.40
0.020(aim 0.015)
0.003
0.07
0.05
0.04
0.38
0.20
X52NS
0.16(aim 0.12)
0.45
1.65
0.020(aim 0.015)
0.003
0.10
0.05
0.04
0.43
0.22
BQS
0.14(aim 0.10)
0.40
1.35
0.020(aim 0.015)
0.003
0.04
0.04
0.04
0.34
0.19
X42QS
0.14(aim 0.10)
0.40
1.35
0.020(aim 0.015)
0.003
0.04
0.04
0.04
0.34
0.19
X46QS
0.15(aim 0.11)
0.45
1.40
0.020(aim 0.015)
0.003
0.05
0.05
0.04
0.36
0.20
X52QS
0.16(aim 0.12)
0.45
1.65
0.020(aim 0.015)
0.003
0.07
0.05
0.04
0.39
0.20
X56QS
0.16(aim 0.12)
0.45
1.65
0.020(aim 0.015)
0.003
0.07
0.05
0.04
0.40
0.21
X60QS
0.16(aim 0.12)
0.45
1.65
0.020(aim 0.015)
0.003
0.08
0.05
0.04
0.41
0.22
X65QS
0.16(aim 0.12)
0.45
1.65
0.020(aim 0.015)
0.003
0.09
0.05
0.06
0.42
0.22
X70QS
0.16(aim 0.12)
0.45
1.65
0.020(aim 0.015)
0.003
0.09
0.05
0.06
0.42
0.22

 

Mechanical Properties of API 5L Seamless Line Pipe:
Class
 Grade
Yield strength Rt0.5(MPa)
Tensile strength Rm (MPa)
Elongation(%)
Rt0.5/Rm
min （max)
min(max)
min
max
PSL1
 B
245
415
b
/
X42
290
415
b
/
X46
320
435
b
/
X52
360
460
b
/
X56
390
490
b
/
X60
415
520
b
/
X65
450
535
b
/
X70
485
570
b
/
PSL2
 BM、BQ、BN、BMS、BQS、BNS
245(450)
415(655)
b
0.93(aim 0.88)
X42M、X42Q、X42N、X42MS、X42QS、X42NS
290(495)
415(655)
b
0.93(aim 0.88)
X46M、X46Q、X46N、X46MS、X46QS、X46NS
320(525)
435(655)
b
0.93(aim 0.88)
X52M、X52Q、X52N、X52MS、X52QS、X52NS
360(530)
460(760)
b
0.93(aim 0.90)
X56M、X56Q、X56N、X56MS、X56QS
390(545)
490(760)
b
0.93(aim 0.90)
X60M、X60Q、X60N、X60MS、X60QS
415(565)
520(760)
b
0.93(aim 0.92)
X65M、X65Q、X65MS、X65QS
450(600)
535(760)
b
0.93(aim 0.92)
X70M、X70Q、X70MS、X70QS
485(635)
570(760)
b
0.93(aim 0.92)
X80M、X80Q
555(705)
625(825)
b
0.93(aim 0.92)
Note:
 a)Tensile strength for the weld shall be not less than the minimum tensile strength.
b)The minimum elongation using the following equation:Af=1940*A0.2/U0.9

 

Toughness of API 5L Seamless Line Pipe:
Grade
≤X60
X60 ≤X65
X65 ≤X70
X70 ≤X80
Transverse minimum Impact of Pipe Body(J)1,2,3        
D≤508mm
27(20)
27(20)
27(20)
40(30)
508mm＜D≤762mm
27(20)
27(20)
27(20)
40(30)
762mm＜D≤914mm
40(30)
40(30)
40(30)
40(30)
914mm＜D≤1219mm
40(30)
40(30)
40(30)
40(30)
1219mm＜D≤1422mm
40(30)
54(40)
54(40)
54(40)
1422mm＜D≤2134mm
40(30)
54(40)
68(50)
68(50)
Transverse minimum Impact of Weld(J)1,2,3        
  D＜1422mm
27(20)
27(20)
27(20)
27(20)
D≥1422mm
40(30)
40(30)
40(30)
40(30)
Note:
1.The values in the table be suitable for the full size standard sample.
2.The value inside bracket is the minimum single value,outside bracket is the average value.
3.Test Temperature:0℃ or lower.

 

Hydrostatic Test of API 5L Seamless Line Pipe:
All steel pipe hydrostatic test should be implemented.Test pressures for all sizes of SMLS pipe, and for welded pipe with D ≤ 457 mm (18.000 in),
shall be held for not less than 5 seconds. Test pressures for welded pipe with D > 457 mm (18.000 in)
shall be held for not less than 10 seconds.

 

Nondestructive Inspection of API 5L Seamless Line Pipe:
Pipe Type
Non-destructive inspection method
Electromagnetic
Ultrasonic
Radiographic
Magnetic particle(circular field)
HFW
not applicable
required
not applicable
not applicable
SAWL
not applicable
required
required
not applicable
SAWH
not applicable
required
required
not applicable
SMLS
required
required
not applicable
required

 

PSL 2 pipe ordered for sour service of API 5L Seamless Line Pipe
HIC/SWC test:The test for evaluation of resistance to hydrogen-induced cracking shall meet the following acceptance criteria, with each ratio being the maximum permissible average for three sections per test specimen when tested in Solution (Environment) A (see ISO 15156-2:2003, Table B.3):

 

  • crack sensitivity ratio (CSR) ≤ 2 %;
  • crack length ratio (CLR) ≤ 15 %;
  • crack thickness ratio (CTR) ≤ 5 %.

 

SSC test of API 5L Seamless Line Pipe:

  1. The test method solution control shall be in accordance with NACE TM0177:2005 Method C;
  2. The test piece shall be as defined in either ISO 7539-2, ASTM G39, or clause H.7.2.3.2 of this standard;
  3. The test solution shall be Solution A as defined in NACE TM0177:2005;
  4. The test duration shall be 720 h.
  5. The test pieces shall be stressed to 0,72 times or higher the specified minimum yield strength of the pipe.

After removal of the SSC test specimens from the test medium, the specimen surface previously under tension shall be examined under a low-power microscope at X10 magnification. The occurrence of any surface breaking fissures or cracks on the tension surface of the test specimen shall constitute failure of the specimen unless it can be demonstrated that these are not the result of sulfide stress cracking.

 

 

 

 

Standard: API SPEC 5L/ISO 3183

 

API 5L Welded Line Pipe

API 5L Welded Line Pipe

:
This Standard specifies requirements for the manufacture of two product specification levels (PSL 1 and PSL 2) of seamless and welded steel pipes for use in pipeline transportation systems in the petroleum and natural gas industries.

 

Application of API 5L Welded Line Pipe:
For conveying gas,water and oil either in the oil or natural gas industries.

Main Steel Grade of API 5L Welded Line Pipe:
B,X42,X46,X52,X56,X60,X65,X70,X80

Pipe type of API 5L Welded Line Pipe:
HFW、SAWL,SAWH,SMLS

Size of API 5L Welded Line Pipe:

  • HFW(1.315in～26.000)
  • SMLS(1.315in～28.000)
  • SAWH(8.625in～84.000)
  • SAWL(16.000in～56.000)

Chemical Analysis(%) of API 5L Welded Line Pipe:

Class Grade
C
Si
Mn
P
S
V
Nb
Ti
CEIIW
CPcm
max
PSL1 B
0.26(aim 0.20)
/
1.20
0.030(aim 0.025)
0.030(aim0.020)
0.15
/
/
X42
0.26(aim 0.20)
/
1.30
0.030(aim 0.025)
0.030(aim0.020)
0.15
/
/
X46
0.26(aim 0.20)
/
1.40
0.030(aim 0.025)
0.030(aim0.020)
0.15
/
/
X52
0.26(aim 0.20)
/
1.40
0.030(aim 0.025)
0.030(aim0.020)
0.15
/
/
X56
0.26(aim 0.20)
/
1.40
0.030(aim 0.025)
0.030(aim0.020)
0.15
/
/
X60
0.26(aim 0.20)
/
1.40
0.030(aim 0.025)
0.030(aim0.020)
0.15
/
/
X65
0.26(aim 0.20)
/
1.45
0.030(aim 0.025)
0.030(aim0.020)
0.15
/
/
X70
0.26(aim 0.20)
/
1.65
0.030(aim 0.025)
0.030(aim0.020)
0.15
/
/
PSL2 BM
0.22(aim 0.18)
0.45
1.20
0.025(aim 0.020)
0.015(aim 0.010)
0.05
0.05
0.04
0.43
0.25
X42M
0.22(aim 0.18)
0.45
1.30
0.025(aim 0.020)
0.015(aim 0.010)
0.05
0.05
0.04
0.43
0.25
X46M
0.22(aim 0.18)
0.45
1.30
0.025(aim 0.020)
0.015(aim 0.010)
0.05
0.05
0.04
0.43
0.25
X52M
0.22(aim 0.18)
0.45
1.40
0.025(aim 0.020)
0.015(aim 0.010)
0.15
0.43
0.25
X56M
0.22(aim 0.18)
0.45
1.40
0.025(aim 0.020)
0.015(aim 0.010)
0.15
0.43
0.25
X60M
0.12(aim 0.10)
0.45
1.60
0.025(aim 0.020)
0.015(aim 0.010)
0.15
0.43
0.25
X65M
0.12(aim 0.10)
0.45
1.60
0.025(aim 0.020)
0.015(aim 0.010)
0.15
0.43
0.25
X70M
0.12(aim 0.10)
0.45
1.70
0.025(aim 0.020)
0.015(aim 0.010)
0.15
0.43
0.25
X80M
0.12(aim 0.10)
0.45
1.85
0.025(aim 0.020)
0.015(aim 0.010)
0.15
0.43
0.25
BMS
0.10(aim 0.08)
0.40
1.25
0.020(aim 0.015)
0.002
0.04
0.04
0.04
/
0.19
X42MS
0.10(aim 0.08)
0.40
1.25
0.020(aim 0.015)
0.002
0.04
0.04
0.04
/
0.19
X46MS
0.10(aim 0.08)
0.45
1.35
0.020(aim 0.015)
0.002
0.05
0.05
0.04
/
0.20
X52MS
0.10(aim 0.08)
0.45
1.45
0.020(aim 0.015)
0.002
0.05
0.06
0.04
/
0.20
X56MS
0.10(aim 0.08)
0.45
1.45
0.020(aim 0.015)
0.002
0.06
0.08
0.04
/
0.21
X60MS
0.10(aim 0.08)
0.45
1.45
0.020(aim 0.015)
0.002
0.08
0.08
0.06
/
0.21
X65MS
0.10(aim 0.08)
0.45
1.60
0.020(aim 0.015)
0.002
0.10
0.08
0.06
/
0.22
X70MS
0.10(aim 0.08)
0.45
1.60
0.020(aim 0.015)
0.002
0.10
0.08
0.06
/
0.22
BN
0.24(aim 0.18)
0.40
1.20
0.025(aim 0.020)
0.015(aim 0.010)
0.06
0.04
0.43
0.25
X42N
0.24(aim 0.18)
0.40
1.20
0.025(aim 0.020)
0.015(aim 0.010)
0.06
0.05
0.04
0.43
0.25
X46N
0.24(aim 0.18)
0.40
1.40
0.025(aim 0.020)
0.015(aim 0.010)
0.07
0.05
0.04
0.43
0.25
X52N
0.24(aim 0.18)
0.45
1.40
0.025(aim 0.020)
0.015(aim 0.010)
0.10
0.05
0.04
0.43
0.25
X56N
0.24(aim 0.18)
0.45
1.40
0.025(aim 0.020)
0.015(aim 0.010)
0.10
0.05
0.04
0.43
0.25
X60N
0.24(aim 0.18)
0.45
1.40
0.025(aim 0.020)
0.015(aim 0.010)
0.10
0.05
0.04
as agreed
BNS
0.14(aim 0.10)
0.40
1.35
0.020(aim 0.015)
0.003
0.06
0.04
0.36
0.19
X42NS
0.14(aim 0.10)
0.40
1.35
0.020(aim 0.015)
0.003
0.05
0.05
0.04
0.36
0.19
X46NS
0.14(aim 0.10)
0.40
1.40
0.020(aim 0.015)
0.003
0.07
0.05
0.04
0.38
0.20
X52NS
0.16(aim 0.12)
0.45
1.65
0.020(aim 0.015)
0.003
0.10
0.05
0.04
0.43
0.22

Mechanical Properties of API 5L Welded Line Pipe:

Class
 Grade
Yield strength Rt0.5(MPa)
Tensile strength Rm (MPa)
Elongation(%)
  

 

Rt0.5/Rm
min （max)
min(max)
min
max
PSL1
 B
245
415
b
/
X42
290
415
b
/
X46
320
435
b
/
X52
360
460
b
/
X56
390
490
b
/
X60
415
520
b
/
X65
450
535
b
/
X70
485
570
b
/
PSL2
 BM、BQ、BN、BMS、BQS、BNS
245(450)
415(655)
b
0.93(aim 0.88)
X42M、X42Q、X42N、X42MS、X42QS、X42NS
290(495)
415(655)
b
0.93(aim 0.88)
X46M、X46Q、X46N、X46MS、X46QS、X46NS
320(525)
435(655)
b
0.93(aim 0.88)
X52M、X52Q、X52N、X52MS、X52QS、X52NS
360(530)
460(760)
b
0.93(aim 0.90)
X56M、X56Q、X56N、X56MS、X56QS
390(545)
490(760)
b
0.93(aim 0.90)
X60M、X60Q、X60N、X60MS、X60QS
415(565)
520(760)
b
0.93(aim 0.92)
X65M、X65Q、X65MS、X65QS
450(600)
535(760)
b
0.93(aim 0.92)
X70M、X70Q、X70MS、X70QS
485(635)
570(760)
b
0.93(aim 0.92)
X80M、X80Q
555(705)
625(825)
b
0.93(aim 0.92)
Note:
 a)Tensile strength for the weld shall be not less than the minimum tensile strength.
b)The minimum elongation using the following equation:Af=1940*A0.2/U0.9

Toughness of API 5L Welded Line Pipe:

Grade
≤X60
>X60 ≤X65
>X65 ≤X70
>X70 ≤X80
Transverse minimum Impact of Pipe Body(J)1,2,3 　

 

 
 　

 

 
 　

 

 
 　

 

 
  D≤508mm
27(20)
27(20)
27(20)
40(30)
  508mm＜D≤762mm
27(20)
27(20)
27(20)
40(30)
  762mm＜D≤914mm
40(30)
40(30)
40(30)
40(30)
  914mm＜D≤1219mm
40(30)
40(30)
40(30)
40(30)
  1219mm＜D≤1422mm
40(30)
54(40)
54(40)
54(40)
  1422mm＜D≤2134mm
40(30)
54(40)
68(50)
68(50)
Transverse minimum Impact of Weld(J)1,2,3 　

 

 
 　

 

 
 　

 

 
 　

 

 
  D＜1422mm
27(20)
27(20)
27(20)
27(20)
  D≥1422mm
40(30)
40(30)
40(30)
40(30)
Note:
1.The values in the table be suitable for the full size standard sample.
2.The value inside bracket is the minimum single value,outside bracket is the average value.
3.Test Temperature:0℃ or lower.

Hydrostatic Test of API 5L Welded Line Pipe: 
All steel pipe hydrostatic test should be implemented.Test pressures for all sizes of SMLS pipe, and for welded pipe with D ≤ 457 mm (18.000 in), 
shall be held for not less than 5 seconds. Test pressures for welded pipe with D > 457 mm (18.000 in) 
shall be held for not less than 10 seconds.

Nondestructive Inspection of API 5L Welded Line Pipe:

Pipe Type
Non-destructive inspection method
Electromagnetic
Ultrasonic
Radiographic
Magnetic particle(circular field)
HFW
not applicable
required
not applicable
not applicable
SAWL
not applicable
required
required
not applicable
SAWH
not applicable
required
required
not applicable
SMLS
required
required
not applicable
required

PSL 2 pipe ordered for sour service of API 5L Welded Line Pipe
HIC/SWC test:The test for evaluation of resistance to hydrogen-induced cracking shall meet the following acceptance criteria, with each ratio being the maximum permissible average for three sections per test specimen
when tested in Solution (Environment) A (see ISO 15156-2:2003, Table B.3):

  • crack sensitivity ratio (CSR) ≤ 2 %;
  • crack length ratio (CLR) ≤ 15 %;
  • crack thickness ratio (CTR) ≤ 5 %.

SSC test of API 5L Welded Line Pipe:

standard;

  1. The test method solution control shall be in accordance with NACE TM0177:2005 Method C;
  2. The test piece shall be as defined in either ISO 7539-2, ASTM G39, or clause H.7.2.3.2 of this
  3. The test solution shall be Solution A as defined in NACE TM0177:2005;
  4. The test duration shall be 720 h.
  5. The test pieces shall be stressed to 0,72 times or higher the specified minimum yield strength of the pipe.

After removal of the SSC test specimens from the test medium, the specimen surface previously under tension shall be examined under a low-power microscope at X10 magnification. The occurrence of any surface breaking fissures or cracks on the tension surface of the test specimen shall constitute failure of the specimen unless it can be demonstrated that these are not the result of sulfide stress cracking.

 

上一篇：GRADES J-55 AND K-55 CASING - MINIMUM COLLAPSE RESISTANCE OF

下一篇：What is the Difference between API 5L line pipe and AS 1579

Recommended product >>

Stainless pipes
+ More stocks
 
Get in touch

Contact us
Telephone:+86-317-6322016
E-mail: [email protected]

Copyright © 2013 TPCO China Steel Enterprise Ltd.  All Rights Reserved