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sch 80 seamless pipe

API 5L Line Pipe

 

API 5L is a standard specification for line pipe that which American Petroleum Institute (API) develops and it provides the requirements for the manufacture of two product specification levels (PSL 1 and PSL 2) of seamless and welded steel pipe for use in pipeline transportation systems in the petroleum.Level PSL 1 provides a standard quality level for line pipe. Level PSL 2 has additional mandatory requirements for chemical composition, notch toughness and strength properties, and additional nondestructive testin.

API 5L specification 46th Edition, initially published in 1965, outlines chemical, mechanical, and hydrostatic testing criteria. Manufacturers must meet API pipe standards requirements and undergo audits to obtain a license for API 5L compliance, allowing them to showcase the API monogram on their products. License renewal every three years ensures continued adherence to quality assurance programs.


Thankfully, YOUFA STEEL PIPE has an API standard certificate and our api 5l consistently follows this standard!

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Size and Manufacturing Process of API 5L line pipe

 

Nominal Pipe Size (NPS) Outside Diameter Nominal Wall Thickness
DN Inch mm SCH5S SCH10S SCH10 SCH20 SCH30 SCH40 SCH60 SCH80 SCH100 SCH120 SCH140 SCH160 STD XS XXS
6 1/8" 10.3 - 1.24 - - - 1.73 - 2.42 - - - - 1.73 2.41 -
8 1/4" 13.7 - 1.65 - - - 2.24 - 3.02 - - - - 2.24 3.02 -
10 3/8" 17.1 - 1.65 - - - 2.31 - 3.2 - - - - 2.31 3.2 -
15 1/2" 21.3 1.65 2.11 - - - 2.77 - 3.73 - - - 4.78 2.77 3.73 7.47
20 3/4" 26.7 1.65 2.11 - - - 2.87 - 3.91 - - - 5.56 2.87 3.91 7.82
25 1" 33.4 1.65 2.77 - - - 3.38 - 4.55 - - - 6.35 3.38 4.55 9.09
32 11/4" 42.2 1.65 2.77 - - - 3.56 - 4.85 - - - 6.35 3.58 4.85 9.7
40 11/2" 48.3 1.65 2.77 - - - 3.68 - 5.05 - - - 7.14 3.68 5.08 10.15
50 2" 60.3 1.65 2.77 - - - 3.91 - 5.54 - - - 8.74 3.91 5.54 11.07
65 21/2" 73 2.11 3.05 - - - 5.16 - 7.01 - - - 9.53 5.16 7.01 14.02
80 3" 88.9 2.11 3.05 - - - 5.49 - 7.62 - - - 11.13 5.49 7.52 15.24
90 31/2" 101.6 2.11 3.05 - - - 5.74 - 8.08 - - - - 5.74 8.08 -
100 4" 114.3 2.11 3.05 - - - 6.02 - 8.58 - 11.13 - 13.49 6.02 8.56 17.12
125 5" 141.3 2.77 3.4 - - - 6.55 - 9.53 - 12.7 - 15.88 6.55 9.53 18.05
150 6" 168.3 2.77 3.4 - - - 7.11 - 10.97 - 14.27 - 18.26 7.11 10.97 21.95
200 8" 219.1 2.77 3.76 - 6.35 7.04 8.18 10.31 12.7 15.09 18.26 20.62 23.01 8.18 12.7 22.23
250 10" 273.1 3.4 4.19 - 6.35 7.8 9.27 12.7 15.09 18.26 21.44 25.4 28.58 9.27 12.7 25.4
300 12" 323.9 3.96 4.57 - 6.35 8.38 10.31 14.27 17.48 21.44 25.4 28.58 33.32 9.53 12.7 25.4
350 14" 355.5 3.96 4.78 6.35 7.92 9.53 11.13 15.09 19.05 23.83 27.79 31.75 35.71 9.53 12.7 -
400 16" 406.4 4.19 4.78 6.35 7.92 9.53 12.7 16.66 21.44 26.19 30.96 36.53 40.49 9.53 12.7 -
450 18" 457.2 4.19 4.78 6.35 7.92 11.13 14.27 19.05 23.83 29.36 34.93 39.67 45.24 9.53 12.7 -
500 20" 508 4.78 5.54 6.35 9.53 12.7 15.09 20.62 26.19 32.54 38.1 44.45 50.01 9.53 12.7 -
550 22" 558.8 4.78 5.54 6.35 9.53 12.7 - 22.23 28.58 34.93 41.28 47.63 53.98 9.53 12.7 -
600 24" 609.6 5.54 6.35 6.35 9.53 14.27 17.48 24.61 30.96 38.89 46.02 52.37 59.54 9.53 12.7 -
650 26" 660.4 - - 7.92 12.7 - - - - - - - - 9.53 12.7 -
700 28" 711.6 - - 7.92 12.7 15.88 - - - - - - - 9.53 12.7 -
750 30" 762 6.35 7.92 7.92 12.7 15.88 - - - - - - - 9.53 12.7 -
800 32" 812.8 - - 7.92 12.7 15.88 17.48 - - - - - - 9.53 12.7 -
850 34" 863.6 - - 7.92 12.7 15.88 17.48 - - - - - - 9.53 12.7 -
900 36" 914.4 - - 7.92 12.7 15.88 19.05 - - - - - - 9.53 12.7 -
950 38" 965.2 - - - - - - - - - - - - 9.53 12.7 -
1000 40" 1015 - - - - - - - - - - - - 9.53 12.7 -
1050 42" 1066.8 - - - - - - - - - - - - 9.53 12.7 -
1100 44" 1117.6 - - - - - - - - - - - - 9.53 12.7 -
1150 46" 1188.4 - - - - - - - - - - - - 9.53 12.7 -
1200 48" 1219.2 - - - - - - - - - - - - - - -

 

 

astm a106 grade b erw

API 5L ERW Welded Pipe

Size: 1/2"-24"

Wall Thickness:2-20mm

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a53 grb seamless

API 5L SMLS  Pipe

Size: 1/2"-24"

Wall Thickness:sch10, sch40, sch80,sch160

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ssaw pipe

API 5L SSAW Welded Pipe

Size: 219mm-4064mm

Wall Thickness:6-28mm

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LSAW Steel welded Pipe

API 5L LSAW Welded Pipe

Size: 406mm-1422mm

Wall Thickness:6-50mm

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Youfa provides various sizes and specifications of ERW, SMLS, SSAW, and LSAW steel pipes to meet the different needs of different industries and applications. If you have any inquiries and questions, please contact Youfa Steel Pipe. at any time. Thanks in advance. Welcome! 

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Acceptable Process of Manufacture and PSLs
Type of Pipe or Pipe End PSL 1 Pipe Grade a PSL 2 Pipe Grade a
L175 or
A25 b		 L175P or
A25P b		 L210 or
A		 L245 or
B		 L290 or X42 to L485 or X70 L245 or B to L555 or X80 > L555 or
X80 to L690 or X100		 > L690 or X1 00 to
L830 or X120
Type of Pipe
SMLS X X X X X X X -
CW X X - - - - - -
LFW X - X X X - - -
HFW X - X X X X - -
LW - - - - X - - -
SAW Lc - - X X X X X X
SAWHd - - X X X X X X
COWLc - - X X X X - -
COWHd - - X X X X - -
Type of Pipe End
Belled ende X - X X X - - -
Plain end X - X X X X X X
Plain end for special coupling X - X X - - - -
Threaded end f X X X X - - - -
  • a Intermediate grades are available if agreed, but limited to grades higher than Grade L290 or X42.
  • b Grades L175, L175P, A25, and A25P are limited to pipe with D≤141.3 mm (5.563 in.)
  • c Double-seam pipe is available if agreed, but limited to pipe with D≥ 914 mm (36.000 in.).
  • d Helical seam pipe is limited to pipe with D≥114.3mm (4.500 in.)
  • e Belled-end pipe is limited to pipe withD≤219.1mm(8.625in.)andt≤3.6mm(0.141in.).
  • f Threaded-end pipe is limited to SMLS and longitudinal seam welded pipe with D≤508 mm (20.000 in.). 
bevelled end
Bevelled ends
6m length gi pipe
Plain ends
erw black steel sch40
Plain end for special coupling
erw structure pipe
Threaded ends

 Youfa provides various types of pipe ends to meet the needs of different industries and applications.If you have any inquiries and questions, please contact Youfa Steel Pipe.

 

Chemical composition of API5L line pipe

 

API 5L composition is tightly controlled, especially for PSL2 has stricter compositional controls.Key focuses are low C / P / S, optimized Mn and microalloying (Nb, V, Ti), and strict Carbon Equivalent limits to ensure weldability and toughness. Sour service imposes even stricter controls.

Chemical Composition for PSL 1 Pipe with t≤25.0 mm (0.984 in.)
Steel Grade
(Steel Name)		 Mass Fraction, Based on Heat and Product Analyses a.g
%
C Mn P S V Nb Ti
max b max b min max max max max max
API 5L Seamless Pipe
L175 or A25 0.21 0.6 - 0.03 0.03 - - -
L175P or A25P 0.21 0.6 0.045 0.08 0.03 - - -
L210 or A 0.22 0.9 - 0.03 0.03 - - -
L245 or B 0.28 1.2 - 0.03 0.03 c,d c,d d
L290 or X42 0.28 1.3 - 0.03 0.03 d d d
L320 or X46 0.28 1.4 - 0.03 0.03 d d P
L360 or X52 0.28 1.4 - 0.03 0.03 d d P
L390 or X56 0.28 1.4 - 0.03 0.03 d d P
L415 or X60 0.28e 1.40e - 0.03 0.03 f f f
L450 or X65 0.28e 1.40e - 0.03 0.03 f f f
L485 or X70 0.28e 1.40e - 0.03 0.03 f f f
API 5L Welded Pipe
L175 or A25 0.21 0.6 - 0.03 0.03 - - -
L175P or A25P 0.21 0.6 0.045 0.08 0.03 - - -
L210 or A 0.22 0.9 - 0.03 0.03 - - -
L245 or B 0.26 1.2 - 0.03 0.03 c,d c,d d
L290 or X42 0.26 1.3 - 0.03 0.03 d d d
L320 or X46 0.26 1.4 - 0.03 0.03 d d d
L360 or X52 0.26 1.4 - 0.03 0.03 d d d
L390 or X56 0.26 1.4 - 0.03 0.03 d d d
L415 or X60 0.26e 1.40e - 0.03 0.03 f f f
L450 or X65 0.26e 1.40e - 0.03 0.03 f f f
L485 or X70 0.26e 1.65e - 0.03 0.03 f f f
  • a Cu ≤ 0.50 %; Ni ≤ 0.50 %; Cr ≤ 0.50 % and Mo ≤ 0.15 %.
  • b For each reduction of 0.01 % below the specified maximum concentration for carbon, an increase of 0.05 % above the specified maximum concentration for Mn is permissible, up to a maximum of 1.65 % for grades ≥ L245 or B, but ≤ L360 or X52; up to a maximum of 1.75 % for grades > L360 or X52, but < L485 or X70; and up to a maximum of 2.00 % for Grade L485 or X70.
  • c Unless otherwise agreed, Nb + V ≤ 0.06 %.
  • d Nb + V + Ti ≤ 0.15 %.
  • e Unless otherwise agreed.
  • f Unless otherwise agreed, Nb + V + Ti ≤ 0.15 %.
  • g No deliberate addition of B is permitted and the residual B ≤ 0.001 %.

 

Chemical Composition for PSL 2 Pipe with t≤ 25.0 mm (0.984 in.)
Steel Grade
( Steel Name )		 Mass Fraction, Based on Heat and Product Analyses
% max		 Carbon
Equivalenta
% max
Cb Si Mnb P S V Nb Ti Other CEWIIW CEpcm
API 5L Seamless and Welded Pipe
L245R or BR 0.24 0.4 1.2 0.025 0.015 c c 0.04 e,l 0.43 0.25
L290R or X42R 0.24 0.4 1.2 0.025 0.015 0.06 0.05 0.04 e,l 0.43 0.25
L245N or BN 0.24 0.4 1.2 0.025 0.015 c c 0.04 e,l 0.43 0.25
L290N or X42N 0.24 0.4 1.2 0.025 0.015 0.06 0.05 0.04 e,l 0.43 0.25
L320N or X46N 0.24 0.4 1.4 0.025 0.015 0.07 0.05 0.04 d,e,l 0.43 0.25
L360N or X52N 0.24 0.45 1.4 0.025 0.015 0.1 0.05 0.04 d.e,l 0.43 0.25
L390N or X56N 0.24 0.45 1.4 0.025 0.015 0.10f 0.05 0.04 d,e,l 0.43 0.25
L415N or X60N 0.24f 0.45f 1.40f 0.025 0.015 0.10f 0.05f 0.04f g,h,l As agreed
L245Q or BQ 0.18 0.45 1.4 0.025 0.015 0.05 0.05 0.04 e,1 0.43 0.25
L290Q or X42Q 0.18 0.45 1.4 0.025 0.015 0.05 0.05 0.04 e,l 0.43 0.25
L320Q or X46Q 0.18 0.45 1.4 0.025 0.015 0.05 0.05 0.04 e,1 0.43 0.25
L360Q or X52Q 0.18 0.45 1.5 0.025 0.015 0.05 0.05 0.04 e,l 0.43 0.25
L390Q or X56Q 0.18 0.45 1.5 0.025 0.015 0.07 0.05 0.04 d,e,l 0.43 0.25
L415Q or X60Q 0.18f 0.45f 1.70f 0.025 0.015 g g g h,l 0.43 0.25
L450Q or X65Q 0.18f 0.45f 1.70f 0.025 0.015 g g g h,l 0.43 0.25
L485Q or X70Q 0.18f 0.45f 1.80f 0.025 0.015 g g g h,l 0.43 0.25
L555Q or X80Q 0.18f 0.45f 1.90f 0.025 0.015 g g g i,j As agreed
L625Q or X90Q 0.16f 0.45f 1.9 0.02 0.01 g g g j,k As agreed
L690Q or X100Q 0.16f 0.45f 1.9 0.02 0.01 g g g j,k As agreed
API 5L Welded Pipe
L245M or BM 0.22 0.45 1.2 0.025 0.015 0.05 0.05 0.04 e,1 0.43 0.25
L290M or X42M 0.22 0.45 1.3 0.025 0.015 0.05 0.05 0.04 e,l 0.43 0.25
L320M or X46M 0.22 0.45 1.3 0.025 0.015 0.05 0.05 0.04 e,1 0.43 0.25
L360M or X52M 0.22 0.45 1.4 0.025 0.015 d d d e,1 0.43 0.25
L390M or X56M 0.22 0.45 1.4 0.025 0.015 d d d e,1 0.43 0.25
L415M or X60M 0.12f 0.45f 1.60f 0.025 0.015 g g g h,1 0.43 0.25
L450M or X65M 0.12f 0.45f 1.60f 0.025 0.015 g g g h,1 0.43 0.25
L485M or X70M 0.12f 0.45f 1.70f 0.025 0.015 g g g h,1 0.43 0.25
L555M or X80M 0.12f 0.45f 1.85f 0.025 0.015 g g g i,l 0.43f 0.25
L625M or X90M 0.1 0.55f 2.10f 0.02 0.01 g g g i,1 _ 0.25
L690M or X100M 0.1 0.55f 2.10f 0.02 0.01 g g g i,j 0.25
L830M or X120M 0.1 0.56f 2.10f 0.02 0.01 g g g i,j 0.25
  • a Based on product analysis, for seamless pipe with t > 20.0 mm (0.787 in.), the CE limits shall be as agreed; the CEIIW limits apply if C > 0.12 % and the CEPcm limits apply if C ≤ 0.12 %.
  • b For each reduction of 0.01 % below the specified maximum for C, an increase of 0.05 % above the specified maximum for Mn is permissible, up to a maximum of 1.65 % for grades ≥ L245 or B, but ≤ L360 or X52; up to a maximum of 1.75 % for grades >L360 or X52, but < L485 or X70; up to a maximum of 2.00 % for grades ≥ L485 or X70, but ≤ L555 or X80; and up to a maximum of 2.20 % for grades > L555 or X80.
  • c Unless otherwise agreed, Nb + V ≤ 0.06 %.
  • d Nb + V + Ti ≤ 0.15 %.
  • e Unless otherwise agreed, Cu ≤ 0.50 %; Ni ≤ 0.30 %; Cr ≤ 0.30 % and Mo ≤ 0.15 %.
  • f Unless otherwise agreed.
  • g Unless otherwise agreed, Nb + V + Ti ≤ 0.15 %.
  • h Unless otherwise agreed, Cu ≤ 0.50 %; Ni ≤ 0.50 %; Cr ≤ 0.50 % and Mo ≤ 0.50 %.
  • i Unless otherwise agreed, Cu ≤ 0.50 %; Ni ≤ 1.00 %; Cr ≤ 0.50 % and Mo ≤ 0.50 %.
  • j B ≤ 0.004 %.
  • k Unless otherwise agreed, Cu ≤ 0.50 %; Ni ≤ 1.00 %; Cr ≤ 0.55 % and Mo ≤ 0.80 %.
  • l For PSL 2 pipe grades except those grades to which footnote j) already applies, the following applies: unless otherwise agreed no
  • intentional addition of B is permitted and residual B ≤ 0.001 %.

 

Production Tolerances of API5L line pipe

 

Tolerances for diameter, wall thickness, length, and straightness of API 5L line pipe

Tolerances for Wall Thickness
Wall Thickness
t
mm (in.)

Tolerances a


mm (in.)
API 5L SMLS Pipe b
≤ 4.0 (0.157) +0.6(0.024)
-0.5(0.020)
>4.0(0.157) to<25.0 (0.984) +0.150t
-0.125t
≥25.0 (0.984) +3.7 (0.146) or +0.1z, whichever is the greater
-3.0 (0.120) or-0.1z, whichever is the greater
API 5L Welded Pipe c,d
≤ 5.0(0.197) ±0.5 (0.020)
> 5.0 (0.197) to < 15.0 (0.591) ±0.1t
≥15.0(0.591) ±1.5(0.060)
  • a If the purchase order specifies a minus tolerance for wall thickness smaller than the applicable value given in this table, the plus tolerance for wall thickness shall be increased by an amount sufficient to maintain the applicable tolerance range.
  • b For pipe with D ≥ 355.6 mm (14.000 in.) and t ≥ 25.0 mm (0.984 in.), the wall thickness tolerance locally may exceed the plus tolerance for wall thickness by an additional 0.05t, provided that the plus tolerance for mass (see 9.14) is not exceeded.
  • c The plus tolerance for wall thickness does not apply to the weld area.
  • d See 9.13.2 for additional restrictions.

 

Tolerances for Random Length Pipe
Random Length
Designation
m (ft)		 Minimum Length
m (ft)		 Minimum Average Length
for Each Order Item
m (ft)		 Maximum Length
m (ft)
Threaded-and-coupled Pipe
6 (20) 4.88 (16.0) 5.33 (17.5) 6.86 (22.5)
9 (30) 4.11 (13.5) 8.00 (26.2) 10.29(33.8)
12(40) 6.71 (22.0) 10.67(35.0) 13.72(45.0)
Plain - end Pipe
6 (20) 2.74 (9.0) 5.33 (17.5) 6.86 (22.5)
9 (30) 4.11 (13.5) 8.00 (26.2) 10.29(33.8)
12 (40) 4.27 (14.0) 10.67(35.0) 13.72(45.0)
15(50) 5.33(17.5) 13.35(43.8) 16.76(55.0)
18 (60) 6.40 (21.0) 16.00 (52.5) 19.81(65.0)
24 (80) 8.53 (28.0) 21.34 (70.0) 25.91 (85.0)

According to the requirements outlined in API 5L, random lengths of line pipe shall be delivered within the tolerances given below:

  • Approximate lengths shall be delivered within a tolerance of ± 500 mm (20 in.).
  • If the supply of jointers is agreed, jointers comprising two pieces welded together to make a length shorter than 15.0 m (49.2 ft) may be furnished to a maximum of 5 % of the order item, or as agreed.
  • If the supply of jointers is agreed, jointers comprising two pieces welded together to make a length 15.0 m (49.2 ft) or longer may be furnished for the entire order item or any portion thereof.
  • If the supply of jointers is agreed, jointers comprising three pieces welded together to make a length 15.0 m (49.2 ft) or longer may be furnished to a maximum of 5 % of the order item, or as agreed.

Tolerances for Diameter and Out-of-roundness

 

 

 

API 5L diameter and ovality tolerances prioritize end-quality (critical for welding) and escalate in strictness for PSL2 and larger diameters. These ensure pipeline integrity under high-pressure/low-temperature conditions, particularly for grades like X65-X80.

If you have any inquiries and questions, please contact Youfa Steel Pipe. at any time. Thanks in advance. Welcome!

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API 5L

Inspection Frequency for API5L Line Pipe

 

API 5L mandates 100% inspection for dimensional, hydrostatic, and visual checks, while chemical, mechanical, and NDT tests are batch-based to ensure efficiency without compromising quality.

Inspection Frequency for PSL 1 Pipe
No Type of Inspection Type of Pipe Frequency of Inspection e
1 Heat analysis All pipe One analysis per heat of steel
2 Product analysis SMLS,CW,LFW,HFW,LW,
SAW, or COW		 Two analyses per heat of steel (taken from
separate product items)
3 Tensile testing of the pipe body of welded pipe with D≤48.3 mm (1.900 in.), in Grade L175 or A25 CW,LFW, or HFW Once per test unit e of not more than 25 tonnes
(28 tons) of pipe
4 Tensile testing of the pipe body of welded pipe with D≤48.3 mm (1.900 in.), in Grade L175P or A25P CW Once per test unit e of not more than 25 tonnes
(28 tons) of pipe
5 Tensile testing of the pipe body of welded pipe with D>48.3 mm (1.900 in.), in Grade L175 or A25 CW, LFW, or HFW Once per test unit of not more than 50 tonnes
(55 tons) of pipe
6 Tensile testing of the pipe body of welded pipe with D>48.3 mm (1.900 in.), in Grade L175P or A25P CW Once per test unit of not more than 50 tonnes
(55 tons) of pipe
7 Tensile testing of the pipe body of seamless pipe SMLS Once per test unit of pipe with the same cold-
expansion ratio a
8 Tensile testing of the pipe body of welded pipe in grades higher than Grade L175 or A25 LFW, HFW, LW, SAW, or
COW		 Once per test unit of pipe with the same cold-
expansion ratio a
9 Tensile testing of the longitudinal or helical seam weld of welded pipe with D≥219.1 mm(8.625 in.) LFW, HFW, LW, SAW, or
COW		 Once per test unit of pipe with the same cold-
expansion ratio a,b,c
10 Tensile testing of the coil/plate end weld of welded pipe with D≥219.1mm(8.625 in.) SAWH or COWH At least once per 50 coil/plate end welds from pipe with the same cold-expansion ratio a,c,d
11 Bend testing of the longitudinal seam weld of welded pipe with D≤ 48.3 mm (1.900 in.), in Grade L175, L175P, A25, or A25P CW, LFW, or HFW Once per test unit of not more than 25 tonnes
(28 tons) of pipe
12 Bend testing of the longitudinal seam weld of welded pipe with 48.3 mm (1.900 in.) CW, LFW, or HFW Once per test unit of not more than 50 tonnes
(55 tons) of pipe
13 Guided-bend testing of the longitudinal or helical seam weld of welded pipe SAW or COW Once per test unit of not more than 50 lengths of
pipe of the same grade
14 Guided-bend testing of the coil/plate end weld of welded pipe SAWH or COWH At least once per 50 coil/plate end welds from pipe with the same cold expansion ratio a,c,d
15 Guided-bend testing of the longitudinal seam weld of welded pipe with D≥ 323.9 mm(12.750 in.) LW Once per test unit of not more than 50 lengths of pipe of the same grade
16 Flattening test of welded pipe CW,LFW,HFW, or LW As shown in Figure 6
17 Hardness testing of hard spots in cold-formed welded pipe LFW,HFW,LW,SAW, or
COW		 Any hard spot exceeding 50 mm (2.0 in.) in any direction
18 Hydrostatic testing SMLS,CW,LFW,HFW,LW,
SAW, or COW		 Each pipe
19 Macrographic testing of the longitudinal or helical seam weld of welded pipe SAW or COW At least once per operating shift plus whenever
any change of pipe size occurs during the
operating shift; or, if 10.2.5.2 applies, at the
beginning of the production of each combination
of specified outside diameter and specified wall
thickness
20 Metallographic testing of the longitudinal seam weld of welded pipe LFW or HFW excluding full-
body normalized pipe		 At least once per operating shift plus whenever
changes of grade, specified outside diameter or
specified wall thickness are made; plus whenever excursions from operating heat treatment conditions are encountered
21 Visual inspection SMLS,CW,LFW,HFW,LW,
SAW, or COW		 Each pipe, except as allowed by 10.2.7.2
22 Pipe diameter and out-of-roundness SMLS, CW, LFW, HFW, LW,
SAW, or COW		 At least once per 4 h per operating shift plus
whenever any change of pipe size occurs during
the operating shift
23 Wall thickness measurement All pipe Each pipe (see 10.2.8.5)
24 Other dimensional testing SMLS,CW, LFW,HFW,LW,
SAW, or COW		 Random testing, with the details left to the discretion of the manufacturer
25 Weighing of pipe with D< 141.3 mm (5.563 in.) SMLS, CW, LFW, HFW, LW,
SAW, or COW		 Each pipe or each convenient group of pipe, with the choice being at the discretion of the
manufacturer
26 Weighing of pipe with D≥ 141.3 mm(5.563 in.) SMLS,CW,LFW,HFW,LW,
SAW, or COW		 Each pipe
27 Length SMLS, CW, LFW, HFW, LW,
SAW, or COW		 Each length of pipe shall be measured, except
that pipe made in lengths that are uniform within
30 mm (0.1 ft) need not be individually measured, provided the accuracy of the length is verified at least once per 4 h per operating shift
28 Nondestructive inspection SMLS,CW, LFW, HFW,LW,
SAW, or COW		 In accordance with AnnexE
  • a The cold-expansion ratio (if applicable) is designated by the manufacturer and is derived using the designated before-expansion outside diameter or circumference and the after-expansion outside diameter or circumference; an increase or decrease in the cold-expansion ratio of more than 0.002 requires the creation of a new test unit.
  • b For double-seam pipe, both longitudinal weld seams in the pipe selected to represent the test unit shall be tested.
  • c Pipe produced by each welding machine shall be tested at least once per week.
  • d Applies only to finished helical seam pipe containing coil/plate end welds.
  • e "Test unit" is as defined in 3.1.60.

 

Inspection Frequency for PSL 2 Pipe
No Type of Inspection Type of Pipe Frequency of Inspectione
1 Heat analysis All pipe One analysis per heat of steel
2 Product analysis SMLS, HFW, SAW, or COW Two analyses per heat of steel (taken from
separate product items)
3 Tensile testing of the pipe body D≤141.3mm(5.563 in.) SMLS, HFW, SAW, or COW Once per test unit of not more than 400 pipes with
the same cold-expansion ratio a
4 Tensile testing of the pipe body D>141.3mm(5.563in.)and≤323.9 mm(12.750 in.) SMLS, HFW, SAW, or COW Once per test unit of not more than 200 pipes with
the same cold-expansion ratio a
5 Tensile testing of the pipe body D>323.9mm(12.750in.) SMLS, HFW, SAW, or COW Once per test unit of not more than 100 pipes with
the same cold-expansion ratio a
6 Tensile testing of the longitudinal or helical seam weld of welded pipe with D≥219.1 mm(8.625in.)and≤323.9
mm (12.750 in.)		 HFW, SAW, or COW Once per test unit of not more than 200 pipes with
the same cold-expansion ratio a,b,c
7 Tensile testing of the longitudinal or helical seam weld of welded pipe with D>323.9mm(12.750 in.) HFW, SAW, or COW Once per test unit of not more than 100 pipes with
the same cold-expansion ratio a,b,c
8 Tensile testing of the coil/plate end weld of welded pipe with D≥219.1 mm(8.625 in.) SAWH or COWH At least once per 50 coil/plate end welds from pipe with the same cold-expansion ratio a,b,d
9 CVN impact testing of the pipe body of pipe with specified outside diameter and specified wall thickness as given in Table 22 SMLS, HFW,SAW, or COW Once per test unit of pipe with the same cold-
expansion ratio a
10 If agreed, CVN impact testing of the longitudinal seam weld of welded pipe with specified outside diameter and specified wall thickness as given in Table 22 HFW Once per test unit of pipe with the same cold-
expansion ratio a,b
11 CVN impact testing of the longitudinal or helical seam weld of welded pipe with specified outside diameter and specified wall thickness as given in Table 22 SAW or COW Once per test unit of pipe with the same cold-
expansion ratio a,b,c
12 CVN impact testing of the coil/plate end weld of welded pipe with specified outside diameter and specified wall thickness as given in Table 22 SAWH or COWH At least once per 50 coil/plate end welds from pipe
with the same cold-expansion ratio a,b,d
13 If agreed, DWT testing of the pipe body of welded pipe with D≥508 mm (20.000 in.) HFW, SAW, or COW Once per test unit of pipe with the same cold-
expansion ratio a
14 Guided-bend testing of the longitudinal or he lical seam weld of welded pipe SAW or COW Once per test unit of not more than 50 lengths of pipe with the same cold-expansion ratio a
15 Guided-bend testing of the coil/plate end weld of welded pipe SAWH or COWH At least once per 50 coil/plate end welds from pipe
with the same cold-expansion ratio a,b,d
16 Flattening test of welded pipe HFW As shown in Figure 6
17 Hardness testing of hard spots in cold-formed welded pipe HFW,SAW, or COW Any hard spot exceeding 50 mm (2.0 in.) in any
direction
18 Hydrostatic testing SMLS,HFW,SAW, or COW Each pipe
19 Macrographic testing of the longitudinal or helical seam weld of welded pipe SAW or COW At least once per operating shift plus whenever any change of pipe size occurs during the operating shift; or,if 10.2.5.3 or 10.2.5.4 applies, at the beginning of the production of each combination of specified outside diameter and specified wall thickness
20 Metallographic testing (or optional hardness test in lieu of metallography) of the longitudinal seam weld of welded pipe HFW excluding full-body
normalized pipe		 At least once per operating shift plus whenever
changes of grade, specified outside diameter or
specified wall thickness are made; plus whenever
excursions from operating heat treatment
conditions are encountered
21 Visual inspection SMLS,HFW,SAW, or COW Each pipe, except as allowed by 10.2.7.2
22 Pipe diameter and out-of-roundness SMLS, HFW, SAW, or COW At least once per 4 h per operating shift plus
whenever any change of pipe size occurs during
the operating shift
23 Wall thickness measurement All pipe Each pipe (see 10.2.8.5)
24 Other dimensional testing SMLS, HFW, SAW, or COW Random testing, with the details left to the discretion of the manufacturer
25 Weighing of pipe with D<141.3 mm(5.563 in.) SMLS, HFW, SAW, or COW Each pipe or each convenient group of pipe, with
the choice being at the discretion of the manufacturer
26 Weighing of pipe with D≥141.3 mm (5.563 in.) SMLS, HFW, SAW, or COW Each pipe
27 Length SMLS, HFW, SAW, or COW Each length of pipe shall be measured, except that
pipe made in lengths that are uniform within 30mm
(0.1 ft) need not be individually measured,provided
the accuracy of the length is verified at least once
per 4 h per operating shift
28 Nondestructive inspection SMLS,HFW,SAW, or COW In accordance with Annex E
  • a The cold-expansion ratio (if applicable) is designated by the manufacturer and is derived using the designated before-expansion outside diameter or circumference and the after-expansion outside diameter or circumference; an increase or decrease in the cold-expansion ratio of more than 0.002 requires the creation of a new test unit.
  • b Pipe produced by each welding machine shall be tested at least once per week.
  • c For double-seam pipe, both longitudinal weld seams in the pipe selected to represent the test unit shall be tested.
  • d Applies only to finished helical seam pipe containing coil/plate end welds.
  • e "Test unit" is as defined in 3.1.60.

 

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Api 5L Certificate For Welded Steel Pipe
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