API 5L X46
API 5L X46
API 5L X46 Pipe is carbon steel pipes that are meticulously constructed in accordance with API (AMERICAN PETROLEUM INSTITUTE) specifications to satisfy the needs of the client. API 5L X46 Pipe is available with a variety of end connectors, including non-upset ends and external upset ends. TUSPIPE performs all required non-destructive testing on these API 5L pipes, including eddy current tests and hydro testing. API 5L pipes in galvanized and black finishes are available in single random lengths of 4-7 meters and double random lengths of 7-13 meters. These API 5L pipes are commonly used to transport oil, gas, and petroleum distillation.
PRODUCT FEATURES
Application of API 5L X46 Line Pipe
The petroleum, oil, petrochemical, and natural gas industries all employ API 5L X46 Welded Pipes. API 5L X46 Pipe is useful for transferring gas, steam, and fluids including water and oil from offshore to refineries. Heating, chemical industry, water supply systems, plumbing, power plants, and the pulp and paper industry are just a few of the industries that use API 5L x46 pipe.
API 5L X46 Pipe Chemical Composition
- Chemical Composition for API 5L X46 PSL 1 pipe with t ≤ 0.984”
Steel Grade | Mass fraction, % based on heat and product analyses a,g | ||||||
C | Mn | P | S | V | Nb | Ti | |
max b | max b | max | max | max | max | max | |
Welded Pipe | |||||||
X46 | 0.26 | 1.4 | 0.3 | 0.3 | d | d | d |
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 API 5L X46 PSL 2 Pipe with t ≤ 0.984”
Steel Grade | Mass fraction, % based on heat and product analyses | Carbon Equiv a | |||||||||
C | Si | Mn | P | S | V | Nb | Ti | Other | CE IIW | CE Pcm | |
max b | max | max b | max | max | max | max | max | max | max | ||
Welded Pipe | |||||||||||
X46M | 0.22 | 0.45 | 1.3 | 0.025 | 0.015 | 0.05 | 0.05 | 0.04 | e,l | 0.43 | 0.25 |
a. SMLS t>0.787”, CE limits shall be as agreed. The CEIIW limits applied 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 all PSL 2 pipe grades except those grades with footnotes j noted, the following applies. Unless otherwise agreed no intentional addition of B is permitted and residual B ≤ 0.001%.
API 5L X46 Pipe Mechanical Properties
- Mechanical Properties for API 5L X46 PSL-1 Pipe
Pipe Grade | Tensile Properties – Pipe Body of SMLS and Welded Pipes PSL 1 | Seam of Welded Pipe | ||
Yield Strength a | Tensile Strength a | Elongation | Tensile Strength b | |
Rt0,5 PSI Min | Rm PSI Min | (in 2in Af % min) | Rm PSI Min | |
X46 | 46,400 | 63,100 | c | 63,100 |
| a. For intermediate grade, the difference between the specified minimum tensile strength and the specified minimum yield for the pipe body shall be as given for the next higher grade. | ||||
| b. For the intermediate grades, the specified minimum tensile strength for the weld seam shall be the same as determined for the body using footnote a. | ||||
| c. The specified minimum elongation, Af, expressed in percent and rounded to the nearest percent, shall be determined using the following equation: | ||||
 | ||||
| Where C is 1 940 for calculation using Si units and 625 000 for calculation using USC units | ||||
| Axc is the applicable tensile test piece cross-sectional area, expressed in square millimeters (square inches), as follows | ||||
| – For circular cross-section test pieces, 130mm2 (0.20 in2) for 12.7 mm (0.500 in) and 8.9 mm (.350 in) diameter test pieces; and 65 mm2 (0.10 in2) for 6.4 mm (0.250in) 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 and the specified wall thickness of the pipe, rounded to the nearest 10 mm2 (0.10in2) | ||||
| – 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 (0.10in2) | ||||
| U is the specified minimum tensile strength, expressed in megapascals (pounds per square inch) |
- Mechanical Properties for API 5L X46 PSL-2 Pipe
Pipe Grade | Tensile Properties – Pipe Body of SMLS and Welded Pipes PSL 2 | Seam of Welded Pipe | |||||
Yield Strength a | Tensile Strength a | Ratio a, c | Elongation | Tensile Strength d | |||
Rt0,5 PSI Min | Rm PSI Min | R10,5IRm | (in 2in) | Rm (psi) | |||
Af % | |||||||
Minimum | Maximum | Minimum | Maximum | Maximum | Minimum | Minimum | |
X46N, X46Q, X46M | 46,400 | 76,100 | 63,100 | 95,000 | 0.93 | f | 63,100 |
| a. For intermediate grade, refer to the full API5L specification. | |||||||
| b. for grades > X90 refers to the full API5L specification. | |||||||
| c. This limit applies for pies with D> 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 foot a. | |||||||
| e. for pipe requiring longitudinal testing, the maximum yield strength shall be ≤ 71,800 psi | |||||||
| f. The specified minimum elongation, Af, expressed in percent and rounded to the nearest percent, shall be determined using the following equation: | |||||||
| |||||||
| Where C is 1 940 for calculation using Si units and 625 000 for calculation using USC units | |||||||
| Axc is the applicable tensile test piece cross-sectional area, expressed in square millimeters (square inches), as follows | |||||||
| – For circular cross-section test pieces, 130mm2 (0.20 in2) for 12.7 mm (0.500 in) and 8.9 mm (.350 in) diameter test pieces; and 65 mm2 (0.10 in2) for 6.4 mm (0.250in) 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 and the specified wall thickness of the pipe, rounded to the nearest 10 mm2 (0.10in2) | |||||||
| – 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 (0.10in2) | |||||||
| U is the specified minimum tensile strength, expressed in megapascals (pounds per square inch | |||||||
| g. Lower values fo R10,5IRm may be specified by agreement | |||||||
| h. for grades > x90 refers to the full API5L specification. |
API 5L X46 Material Equivalent
API 5L | Specification for line pipe | |
X46 | PSL1 | L320 or X46 |
X46 | PSL2 | L320Q or X46Q |
R: As rolled
N: Normalizing rolled, normalized formed, Normalized
Q: Tempered and quenched
M: Thermomechanical rolled or thermomechanical formed
S: Sour Service
Dimensions and Sizes of API 5L X46 Line Pipe
NPS | O. D. | Nominal Wall Thickness |
| |||||||||||||||
DN | Inch | mm | SCH5S | SCH10S | SCH10 | SCH20 | SCH30 | SCH40 | SCH60 | SCH80 | SCH100 | SCH120 | SCH140 | SCH160 | STD | XS | XXS | |
50 | 2″ | 60.3 | 1.65 | 2.77 | – | – | – | 3.91 | – | 5.54 | – | – | – | 8.74 | 3.91 | 5.54 | 11.07 | |
65 | 2 1/2″ | 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 | 3 1/2″ | 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 | 39.36 | 34.93 | 39.67 | 45.24 | – | – | – | |
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 | – | – | – | |
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 | – | – | – | |
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 | – | – | – | |
API 5L X46 Pipe Tolerance
O.D. Tolerance | W.T. Tolerance | ||
X46 | |||
D ＜ 60.3mm | +0.41/-0.40mm | D ＜ 73mm | +15%/-12.5% |
D ≥ 60.3m | +0.75/-0.40mm | D ≥ 73mm | +15%/-12.5% |
API 5L X46 Pipe Marking & Packaging
- The tube type, heat number, steel grade, and size are all stamped on each API 5L X46 Pipe. Other markings, such as stamping, are available upon request.
- Hand-painted, stenciled, or die-stamped
- Manufacturer’s name or mark, API 5L, Spec 5L, Gr. B pipe, size, weight per foot, grade, manufacturing process, steel type, and length (NPS 4 and larger only). When the test pressure exceeds the limit (NPS 2 and larger only). HN, HS, HA, or HQ heat treatment symbols, as applicable.
Test and inspection of API 5L X46 Line pipes
- Hydrostatic Test
The pipe must be able to survive a hydrostatic test without leaking through the weld seam or the pipe body. Jointers do not need to be hydrostatically tested if the pipe sections utilized have been successfully tested.
- Bend Test
There shall be no cracks in any part of the test piece, nor shall there be any opening of the weld.
- Flattening Test
The flattening test method is used to evaluate and exhibit the deformation performance of line pipe to the prescribed size. The flattening test will reveal the pipe’s resistance to longitudinal and circumferential cracking, as well as its internal and surface faults, based on the stress and deformation characteristics of the specimen during the flattening procedure.
- CVN Impact Test for PSL-2
CVN is required for several PSL2 pipe diameters and grades. The body will be inspected for seamless pipe. The welded pipe must be examined in three areas: the body, the pipe weld, and the heat-affected zone. The chart of sizes and grades, as well as the required absorbed energy values, may be found in the full API 5L specification.
- DWT Test for PSL-2 Welded Pipe
The average shear fracture area for each test (of a set of two test pieces) shall be 85 percent, based on a test temperature of 0°C (32°F) or if accepted, a lower test temperature. For wall thicknesses greater than 25.4mm (1.000 in. ), DWT test acceptance standards must be agreed upon.
NOTE1: At or above the test temperature, such shear-fracture area assures a suitably ductile fracture.
NOTE2: In gas pipelines, an appropriate combination of shear-fracture area and CVN absorbed energy is an essential pipe-body feature for avoiding brittle fracture propagation and controlling ductile fracture propagation (see Annex G and Table20).
