Rolf Engineering Solutions is the trader and supplier of API 5L Grade L245NO or BNO, L290NO or X42NO, L320NO or X46NO, L360NO or X52NO, L245QO or BQO, L290QO or X42QO, L320QO or X46QO, L360QO or X52QO, L390QO or X56QO, L415QO or X60QO, L450QO or X65QO, L485QO or X70QO, L555QO or X80QO, L625QO or X90QO, L690QO or X100QO Seamless Pipe. And also trade API 5l Grade L245MS or BMS, L290MS or X42MS, L320MS or X46MS, L360MS or X52MS, L390MS or X56MS, L415MS or X60MS, L450MS or X65MS, L485MS or X70MS, L555MS or X80MS Welded Pipe.
Annex J (normative)
PSL 2 Pipe ordered for Offshore service
J.1 Introduction
This annex specifies additional provisions that apply for PSL 2 pipe that is ordered for offshore service [ see 7.2 c) 61.]
NOTE : This annex does not include requirements for specialized tests for pipe intended for applications such as pipe reeling or for pipe that will experience high (> 0,5 %) total, single event strain during installation. For such applications, additional testing can be necessary to prove the suitability of the pipe and the purchaser might need to supplement the requirements of this Standard with other appropriate provisions (e.g. see DNV-OS-F101[16]).
J.2 Additional information to be supplied by the purchaser
The purchase order shall indicate which of the following provisions apply for the specific order item:
a ) steel casting method for strip or plate used for the manufacture of welded pipe (see J.3.3.2.1.);
b ) ultrasonic inspection of strip or plate for laminar imperfections (see J.3.3.2.4);
c ) supply of helical-seam pipe containing coil/plate end welds (see J.3.3.2.5);
d ) chemical composition for intermediate grades (see J.4.1.1);
e ) chemical composition for pipe with t > 25,0 mm (0.984 in) (see J.4.1.2);
f ) carbon equivalent limit for steel Grade L555QO or X80QO, L625QO or X90QO, and L690QO or X100QO (see Table J.1);
g ) chemical composition limits [see Table J.1, footnotes d)];
h ) acceptance criteria for tensile properties if determined at other than room temperature (see J.4.2.2);
I ) for grades equal to or greater than Grade L555 or X80, a lower maximum tensile strength limit may be agreed [see Table J.2, footnote b)];
j ) minimum average length other than 12,1 m (39.7 ft) and/or different range (see J.6.3);
k ) diameter and out-of-roundness tolerances for SMLS pipe with t > 25,0 mm (0.984 in) [see Table J.3, footnote b)];
l ) use of inside diameter to determine diameter and out-of-roundness tolerances for non expanded pipe with D ≥ 219,1 mm (8.625 in) [see Table J.3, footnote c)];
m ) hardness test of the pipe body seam weld and HAZ of EW and SAW pipe (see Table J.7);
n ) hardness testing of pipe body for SMLS (see Table J.7);
o ) CTOD testing (see J.8.2.2 and Table J.6);
p ) use of the ring expansion test for transverse yield strength determinations [see Table J.7, footnote c)];
q ) additional longitudinal tensile testing for deep-water pipelay [see Table J.7, footnote d)];
r ) deviation from hardness test (see J.8.3.2.2 c) and J.8.3.2.3];
s ) deviation from location of hardness test (see J.8.3.2.2 c);
t ) for pipe with t ≥ 5,0 mm (0.197 in), ultrasonic inspection for laminar imperfections within extended length of 100 mm (4,0 in) at the pipe ends (see K.2.1.3);
u ) supplementary end NDT lamination criteria (see K.2.1.3 and K.2.1.4);
v ) magnetic particle inspection for laminar imperfections at each pipe end face/bevel (see K.2.1.4);
Table H.1 ---Chemical composition for pipe with t ≤25,0 mm (0.984 in)
API 5L Steel Grade (Steel Name) |
Mass Fraction, Based Upon Heat and Product Analysis
% Maximum |
Carbon Equivalent a b % Maximum |
|||||||||
C b |
Si |
Mn b |
P
|
S |
V |
Nb |
Ti |
Otherc |
CE IIW |
CE PCM |
|
Seamless and Welded Pipe |
|||||||||||
| L245NO or BNO | 0,14 |
0,40 |
1,35
|
0.020
|
0,010
|
d
|
d |
0,04 |
e,f
|
0,36
|
0,19g
|
| L290NO or X42NO | 0,14 |
0,40 |
1,35
|
0,020
|
0,010 |
0,05 |
0,05 |
0,04 |
f |
0,36 |
0,19g |
| L320NO or X46NO | 0,14 |
0,40 |
1,40
|
0,020
|
0,010 |
0,07 |
0,05 |
0,04 |
e,f |
0,38 |
0,20g |
| L360NO or X52NO | 0,16 |
0,45 |
1,65
|
0,020
|
0,010 |
0,10 |
0,05 |
0,04 |
e |
0,43 |
0,22g |
| L245QO or BQO | 0,14 |
0,40 |
1,35
|
0,020
|
0,010 |
0,04 |
0,04 |
0,04 |
f |
0,34 |
0,19g |
| L290QO or X42QO | 0,14 |
0,40 |
1,35
|
0,020
|
0,010 |
0,04 |
0,04 |
0,04 |
f |
0,34 |
0,19g |
| L320QO or X46QO | 0,15 |
0,45 |
1,40 |
0,020 |
0,010 |
0,05 |
0,05 |
0,04 |
f |
0,36 |
0,20g |
| L360QO or X52QO | 0,16 |
0,45 |
1,65 |
0,020 |
0,010 |
0,07 |
0,05 |
0,04 |
e,h |
0,39 |
0,20g |
| L390QO or X56QO | 0,16 |
0,45 |
1,65 |
0,020 |
0,010 |
0,07 |
0,05 |
0,04 |
e,h |
0,40 |
0,21g |
| L415QO or X60QO | 0,16 |
0,45 |
1,65 |
0,020 |
0,010 |
0,08 |
0,05 |
0,04 |
e,h |
0,41 |
0,22g |
| L450QO or X65QO | 0,16 |
0,45 |
1,65 |
0,020 |
0,010 |
0,09 |
0,05 |
0,06 |
e,h |
0,42 |
0,22g |
| L485QO or X70QO | 0,17 |
0,45 |
1,65 |
0,020 |
0,010 |
0,10 |
0,05 |
0,06 |
e,h |
0,42 |
0,23g |
| L555QO or X80QO | 0,17 |
0,45 |
1,85 |
0,020 |
0,010 |
0,10 |
0,06 |
0,06 |
e,h |
as agreed |
|
| L625QO or X90QO | 0,14 |
0,45 |
1,85 |
0,020 |
0,010 |
0,10 |
0,06 |
0,06 |
e,i |
as agreed |
|
| L690QO or X100QO | 0,14 |
0,45 |
1,85 |
0,020 |
0,010 |
0,10 |
0,06 |
0,06 |
e,i |
as agreed |
|
Welded Pipe |
|||||||||||
| L245MS or BMS | 0,12 |
0,40 |
1,25 |
0,020 |
0,010 |
0,04 |
0,04 |
0,04 |
f |
-- |
0,19 |
| L290MS or X42MS | 0,12 |
0,40 |
1,35 |
0,020 |
0,010 |
0,04 |
0,04 |
0,04 |
f |
-- |
0,19 |
| L320MS or X46MS | 0,12 |
0,45 |
1,35 |
0,020 |
0,010 |
0,05 |
0,05 |
0,04 |
f |
-- |
0,20 |
| L360MS or X52MS | 0,12 |
0,45 |
1,65 |
0,020 |
0,010 |
0,05 |
0,05 |
0,04 |
e,h |
-- |
0,20 |
| L390MS or X56MS | 0,12 |
0,45 |
1,65 |
0,020 |
0,010 |
0,06 |
0,08 |
0,04 |
e,h |
-- |
0,21 |
| L415MS or X60MS | 0,12 |
0,45 |
1,65 |
0,020 |
0,010 |
0,08 |
0,08 |
0,06 |
e,h |
-- |
0,21 |
| L450MS or X65MS | 0,12 |
0,45 |
1,65 |
0,020 |
0,010 |
0,10 |
0,08 |
0,06 |
e,h |
-- |
0,22 |
| L485MS or X70MS | 0,12 |
0,45 |
1,75 |
0,020 |
0,010 |
0,10 |
0,08 |
0,06 |
e,h |
-- |
0,22 |
| L555MS or X80MS | 0,12 |
0,45 |
1,85 |
0,020 |
0,010 |
0,10 |
0,08 |
0,06 |
e,h |
-- |
0,24 |
a Based upon product analysis (see 9.2.4 and 9.2.5) The CE llw limits apply if the C > 0,12 % and the CE pcm limits apply if the < 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 increase of 0,20 %, but up to a maximum of 2.20% for grades ≥ L625 or X90.
c Al total ≤ 0,060 %; N ≤ 0,012 %; Al/N ≥ 2:1 (not applicable to titanium-killed or titanium-treated steel);
d Unless otherwise agreed , Nb + V ≤ 0,06 %.
e Nb + V + Ti ≤ 0,15 %.
f Cu ≤ 0,35 %; Ni ≤ 0,30 %; Cr ≤ 0,30 %; Mo ≤ 0,10 %; B ≤ 0,000 5 %.
g For SMLS pipe, the listed value is increased by 0,03 percentage points, up to a maximum of 0,25 %.
h Cu ≤ 0,50 %; Ni ≤ 0,50 %; Cr ≤ 0,50 %; Mo ≤ 0,50 %; B ≤ 0,000 5 %.
i Cu ≤ 0,50 %; Ni ≤ 0,60 %; Cr ≤ 0,55 %; Mo ≤ 0,80 %; B ≤ 0,000 5 %.
J.4.2 Tensile properties
J.4.2.1 The tensile properties shall be as given in Table J.2.
J.4.2.2 If additional tensile properties are required to be determined at other than room temperature, the acceptance criteria shall be as agreed.
Table J.2 ---Requirements for the results of tensile tests
API 5L Steel Grade |
Pipe Body of Seamless and Welded Pipes
|
Weld Seam of HFW, and SAW Pipes |
|||||
Yield Strength.a |
Tensile Strength.a,b |
Ratio a,c Rt0,5 / Rm |
Elongation on 50 mm or 2 in |
Tensile Strength.d |
|||
Minimum |
Maximum |
Minimum |
Maximum |
Maximum |
Minimum |
Minimum |
|
| L245NO or BNO L245QO or BQO L245MO or BMO |
245 (35 500) |
450 e (65 300) e |
415 (60 200) |
655 (95 000) |
0.93 |
f |
415 (60 200) |
| L290NO or X42NO L290QO or X42QO L290MO or X42MO |
290 (42 100) |
495 (71 800) |
415 (60 200) |
655 (95 000) |
0.93 |
f |
415 (60 200) |
| L320NO or X46NO L320QO or X46QO L320MO or X46MO |
320 (46 400) |
520 (75 000) |
435 (63 100) |
655 (95 000) |
0.93 |
f |
435 (63 100) |
| L360NO or X52NO L360QO or X52QO L360MO or X52MO |
360 (52 200) |
525 (76 000) |
460 (66 700) |
760 (110 200) |
0.93 |
f |
460 (66 700) |
| L390QO or X56QO L390MO or X56MO |
390 (56 600) |
540 (78 300) |
490 (71 100) |
760 (110 200) |
0.93 |
f |
490 (71 100) |
| L415QO or X60QO L415MO or X60MO |
415 (60 200) |
565 (81 900) |
520 (75 400) |
760 (110 200) |
0.93 |
f |
520 (75 400) |
| L450QO or X65QO L450QO or X65MO |
450 (65 300) |
570 (82 700) |
535 (77 600) |
760 (110 200) |
0.93 |
f |
535 (77 600) |
| L485QO or X70QO L485MO or X70MO |
485 (70 300) |
605 (87 700) |
570 (82 700) |
760 (110 200) |
0.93 |
f |
570 (82 700) |
| L555QO or X80QO L555MO or X80MO |
555 (80 500) |
675 (97 900) |
625 (90 600) |
825 (119 700)b |
0.93 |
f |
625 (90 600) |
| L625QO or X90QO |
625 (90 600) |
745 (97 900) |
695 (100 800) |
825 (129 800)b |
0.97 h |
f |
- |
| L690QO or X100QO | 690 g (100 100) |
810 g (117 500) |
760 (110 200) |
960 (139 200)b |
0.97 i |
f |
- |
Table J.2 --Requirements for the results of tensile tests
a For intermediate grades, the difference between the specified maximum yield strength and the specified minimum yield strength shall be as given in the table for the next higher grade, and the difference between the specified minimum tensile strength and the specified minimum yield strength shall be as given in the table for the next higher grade, For intermediate grades up to Grade L320 or X46, the tensile strength shall be ≤ 655 MPa (95 000). For intermediate grades greater than Grade L320 or X46 and less than Grade L550 or X80, the tensile strength shall be ≤ 760 MPa (110 200). For intermediate grades higher than Grade L555 or X80, the maximum permissible tensile strength shall be obtained by interpolation. For SI Units, the calculated value shall be rounded to the nearest 5 MPa. FOr USC units, the calculated value shall be rounded to nearest 100 psi.
b If agreed for pipe in grades equal to or greater than Grade L555 or X80, more stringent maximum tensile strength limits may apply.
c This limit applies for pipe with D >323, 9 mm (12.750 in).
d For intermediate grades, the specified minimum tensile strength for the weld seam shall be the same value as was determined for the pipe body using footnote a).
e For pipe requiring longitudinal testing the yield strength shall be ≤495 MPa (71 800 psi).
f The specified minimum elongation, Af, on 50mm or (2 in), expressed in percent and rounded to the nearest percent, shall be as determined using the following equation:
Where
C is 1 940 for calculations using SI units and 625 000 for calculations using USC units;
A xc is the applicable tensile test piece cross-sectional area, expressed in square millimeters (square inches), as follows:
-- for circular cross-section test pieces, 130 mm2 (0.20 in2) for 12,5 mm (0.500 in) and 8,9 mm (0.350 in) diameter test pieces; and 65 mm2 ( 0.10 in2) for 6,4 mm (0.250 in) diameter test pieces;
-- for full-section test pieces, the lesser of a) 485 mm2 (0.75 in2) and b) the cross-sectional area of the test piece, derived using the specified outside diameter & the specified wall thickness of the pipe, rounded to the nearest 10 mm2 (0.01 in2)
-- for strip test pieces, the lesser of a) 485 mm2( 0.75 in2 ) and b) the cross-sectional area of the test piece, derived using the specified width of the test piece and the specified wall thickness of the pipe, rounded to the nearest 10 mm2 (0.01 in2 );
U is the specified minimum tensile strength, expressed in megapascals (pounds per square inch).
g For grades > L625QO or X90QO, Rp0.2 applies.
h Lower Rt0.5 /Rm ratio values may be specified by agrement for L625 or X90.
i For Grades >L625 or X90, Rp0.2 /Rm applies. Lower Rp0.2 /Rm ratio values may be specified by agrement.
J.4.3 Hardness test
For test pieces subjected to a hardness test (see J.8.3.2), the hardness in the pipe body, weld and HAZ shall be
a ) ≤ 270 HV10 or ≤ 25 HRC for Grades ≤ L450 or X65
b ) ≤ 300 HV10 or ≤ 30 HRC for Grades > L450 or X65 > and ≤ L555 or X80.
c ) ≤ 325 HV10 or ≤ 33 HRC for Grades > L555 or X80.
Table J.3 Tolerances for diameter and out-of-roundness
Specified outside diameter D mm (in) |
Diameter Tolerance mm (in) |
Out-of-roundness tolerances mm (in) |
||||
Pipe except the end a |
Pipe end a,b,c |
Pipe except the end a |
Pipe end a,b,c |
|||
SMLS Pipe |
Welded Pipe |
SMLS Pipe |
Welded Pipe |
|||
<60,3 (2.275) |
± 0,5 (0.020) or ± 0,007 5 D, whichever is the greater |
± 0,5 (0.020) or ± 0,007 5 D, whichever is the greater, but maximum of ± 3,2 (0.125) |
± 0,5 (0.020) or ± 0,005 5 D, whichever is the greater, but maximum of ± 1,6 (0.063) |
0,9 (0.036) |
0,6 (0.024) |
|
≥ 60,3 (2.375) to ≤ 610 (24.000) |
0,015 D for |
0,01 D for  by agreement  |
||||
>610 (24.000) to ≤ 1 422 (56.000) |
± 0,01 D |
± 0,005 D, but maximum of ± 4,0 (0.160) |
± 2,0 (0.079) |
± 1,6 (0.063) |
0,01 D but maximum of 10 (0.4), for by agreement |
0,007 5D but maximum of 8 (0.3), for by agreement |
> 1 422 (56.000) |
as agreed |
|||||
a The pipe end includes a length of 100 mm (4.0 in) at each of the pipe extremities.
b For SMLS pipe, the tolerances apply for t ≤ 25.0 mm (0.984 in). and the tolerances for heavier pipe shall be as agreed.
c For expanded pipe with D ≥ 219,1 mm (8.625 in) and for non-expanded pipe, the diameter tolerance and the out-of-roundness tolerance may be determined using the calculated inside diameter (the specified outside diameter minus two times the specified wall thickness) or measured inside diameter rather than the specified outside diameter.(see 10.2.8.3.)
d For determining compliance to diameter tolerances, the pipe diameter is defined as the circumference of the pipe in any circumferential plane divided by Pi.
Table J.4 -- Tolerance for Wall Thickness
Wall thickness
t mm (in) |
Tolerance amm (in) |
< 4,0 (0.157) |
+ 0,6 (0.024) - 0,5 (0.020) |
≥ 4,0 (0.157) to < 10,0 (0.394) |
+ 0,15 t - 0,125 t |
≥ 10,0 (0.394) to < 25,0 (0.984) |
+ 0,125 t - 0,125 t |
≥ 25,0 (0.984) |
+ 3,7 (0.146) or + 0,1 t, whichever is the greater b - 3,0 (0.120) or - 0,1 t, whichever is the greater b |
HFW pipe c,d |
|
≤ 6,0 (0.236) |
± 0,4 (0.016) |
> 6,0 (0.236) to ≤ 15,0 (0.591) |
± 0,7 (0.028) |
> 15,0 (0.591) |
± 1,0 (0.039) |
SAW pipe c,d |
|
≤ 6,0 (0.236) |
± 0,5 (0.020) |
>6,0 (0.236) to ≤ 10,0 (0.394) |
± 0,7 (0.028) |
>10,0 (0.394) to ≤ 20,0 (0.787) |
± 1,0 (0.039) |
> 20,0 (0.787) |
+ 1,5 (0.060) - 1,0 (0.039) |
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 tolerance is +12.5% / -12.5% .
c The plus tolerance for wall thickness does not apply to the weld area.
d See 9.13.2 and J 7.2 for additional restrictions.
Table H.3 -- Inspection frequency
| Type of Inspection | Type of Pipe | Frequency of Inspection |
| Tensile testing of the pipe body of pipe with D<508 mm (20.000 in) | SMLS, HFW, or SAW | Once per test unit of not more than 100 lengths of pipe with the same cold-expansion ratio a |
| Tensile testing of the pipe body of pipe with D ≥ 508 mm (20.000 in) | SMLS, HFW, or SAW | Once per test unit of not more than 50 lengths of pipe with the same cold-expansion ratio a |
| Tensile testing of the longitudinal or helical-seam weld of welded pipe with 219,1 mm (8.625 in) ≥, D < 508 mm (20.000 in) | HFW, or SAW | Once per test unit of not more than 100 lengths of pipe with the same cold expansion ratio a,b |
| Tensile testing of the longitudinal or helical-seam weld of welded pipe with D ≥, 508 rnm (20.000 in) | HFW, or SAW | Once per test unit of not more than 50 lengths of pipe with the same cold expansion ratio a.b.c |
| Tensile testing of the strip/plate end weld of SAW pipe with D ≥ 219,1 mm (8.625 in) | SAW | Once per test unit of not more than 50 lengths of pipe with the same cold-expansion ratio a.b.c |
| CVN impact testing of the pipe body of pipe with 114,3 mm (4.500 in) ≤ D < 508 mm (20.000) and specified wall thickness as given in Table 22 | SMLS, HFW, or SAW | Once per test unit of not more than 100 lengths of pipe with the same cold-expansion ratio a |
| CVN impact testing of the pipe body of pipe with D ≥ 508 mm (20.000) and specified wall thickness as given in Table 22 | SMLS, HFW, or SAW | Once per test unit of not more than 50 lengths of pipe from the same heat of steel and with the same cold-expansion ratio a |
| CVN impact testing of the longitudinal or helical-seam weld of welded pipe with 114,3 mm (4.500 in) ≤ D < 508 mm (20.000) and specified wall thickness as given in Table 22 | longitudiHFW, or SAW | Once per test unit of not more than 100 lengths of pipe with the same cold-expansion ratio a,b |
| CVN impact testing of the longitudinal or helical-seam weld of welded pipe with D ≥ 508 mm (20.000) and specified wall thickness as given in Table 22 | HFW, SAW | Once per test unit of not more than 50 lengths of pipe with the same cold-expansion ratio a,b,c |
| CVN impact testing of the coil/plate and weld of welded pipe with D ≥ 114,3mm (4.500) and specified wall thickness as given in Table 22 | andSAW | At least once per 50 coil/plate end welds from pipe with the same cold-expansion ratio a,b,d |
| If agreed, hardness testing of pipe body and of the longitudinal or helical-seam weld and HAZ of welded pipe | HFW, or SAW | As agreed |
| Pipe diameter and out-of-roundness for pipe with D ≤ 168,3 mm (6.625 in) | SMLS, HFW, or SAW | Once per test unit of not more than 100 lengths of pipe |
| Pipe diameter and out-of-roundness for pipe with D < 168,3 mm (6.625 in) | SMLS, HFW, or SAW | Once per test unit of not more than 20 lengths of pipe |
| Non-destructive inspection | SMLS, HFW, or SAW | In accordance with Annex K |
| If agreed, for information purposes only, CTOD test for pipe in Grades ≥ L360 or X52 | SAW | Once; formanufacturing procedure qualification only |
a The cold-expansion ratio 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 In addition, 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 strip/plate and welds.