API 5L X52
TUSPIPE’s API 5L X52 steel pipes are API certified, offering more refined performance control suitable for demanding transport environments. Stable mechanical properties provide peace of mind in oil and gas engineering projects.
API 5L X52
The American Petroleum Institute specification API 5L covers seamless and welded steel line pipe. API 5L X52 is a steel grade that is often used in the petroleum industry. It is a higher strength steel grade than X42 and is typically used in higher-pressure applications.
The API 5L X52 is available in PSL-1 and PSL-2 and is one of the most common steel grades used in the pipeline industry. The API 5L X52 material has good weldability and formability properties and is typically made from carbon steel. The strength of the API 5L X52 pipe grade makes it ideal for use in high-pressure applications.
Why choose tuspipe?
Since 1998, Tianjin United Steel Piping Co., Ltd (TUSPIPE) has been committed to supplying high-quality line pipes.
With over 500,000 tons annual production capacity, the company serves various fields and industries, such as oil & gas exploitation and transmission, ship & auto-building, water & electricity, environmental protection, mechanical engineering, infrastructure construction and etc.
TUSPIPE places a premium on product quality and rigorous product quality control. In order to maintain good product quality, the company has established a Test & Inspection Center since 2004. With a series of state-of-the-art tests and inspection equipment, the test & inspection center is able to perform the tensile tests, hydro tests, impact tests, DWTT, etc.
Application of API 5L X52
API 5L X52 pipe is a type of steel pipe that is commonly used in the petroleum and oil and gas industries. The transport and supply of petroleum, natural gas, and other fluids are typically done through API 5L X52 line pipe. This type of pipe is also commonly used in the construction industry, as it is known for its strength and durability. API 5L X52 specification line pipe can be used in a variety of applications, and it is one of the most popular types of steel pipes on the market
What is the Difference between api 5l x52 PSL-1 and PSL-2?
API 5L X52 is the international standard for pipeline transportation of oil and natural gas. The levels are PSL-1 and PSL-2.
API 5L X52 PSL-1 Levels:
- Used for pipes transported at low pressure.
- Less stringent test requirements.
- Suitable for standard applications in less demanding conditions.
API 5L X52 PSL-2 Levels:
- Used for pipes transported at higher pressure.
- Stricter quality control requirements.
- Requires more extensive testing of pipe properties.
Mechanical properties tested include tensile strength, yield strength, and elongation.
Chemical properties, such as composition and impurities, are thoroughly examined.
- More stringent requirement for the frequency of testing.
- Considered to be of higher quality compared to PSL-1 pipes.
API 5L X52 Chemical Composition
- Chemical Composition for API 5L X52 PSL 1 pipe with t ≤ 0.984”
| Steel Grade | API 5L X52 Mass fraction, % based on heat and product analyses a,g | ||||||
|---|---|---|---|---|---|---|---|
| C% | Mn% | P% | S% | V% | Nb% | Ti% | |
| max | max | max | max | max | max | max | |
| Seamless Pipe | |||||||
| X52 | 0.28 | 1.4 | 0.3 | 0.3 | d | d | d |
| Welded Pipe | |||||||
| X52 | 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, | |||||||
| 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 X52 PSL 2 Pipe with t ≤ 0.984”
| Steel Grade | API 5L X52 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 | |||
| Seamless and Welded Pipe | ||||||||||||
| X52N | 0.24 | 0.45 | 1.4 | 0.025 | 0.015 | 0.1 | 0.05 | 0.04 | d,e,l | 0.043 | 0.25 | |
| X52Q | 0.18 | 0.45 | 1.5 | 0.025 | 0.015 | 0.05 | 0.05 | 0.04 | e,l | 0.043 | 0.25 | |
| Welded Pipe | ||||||||||||
| X52M | 0.22 | 0.45 | 1.4 | 0.025 | 0.015 | d | d | d | e,l | 0.043 | 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 orAPI 5L 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 API 5L X52 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%.
Mechanical Properties OF API 5L X52
- Mechanical Properties for API 5L X52 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 | |
| X52 | 52,200 | 66,700 | c | 66,700 |
| 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 X52 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 | |
| X52N, X52Q, X52M | 52,200 | 76,900 | 66,700 | 110,200 | 0.93 | f | 66,700 |
| 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. |
Dimensions and Sizes of API 5L X52 Line Pipe
One important consideration before purchasing an API 5L X52 line pipe is its diameter and size. The dimensions and masses of API 5L X52 specification in ISO 4200 and ASME B36.10M. These standards provide a guide for different diameter API 5L X52 pipes and specify the wall thickness of each size. To check if a particular pipe meets the required standards, refer to these API 5L X52 Standards charts.
| NPS | O. D. | W. T. | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| DN | Inch | mm | SCH5S | SCH10S | SCH10 | SCH20 | SCH30 | SCH40 | SCH60 | SCH80 | SCH100 | SCH120 | SCH140 | SCH160 | Sth | 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 X52 Pipe Tolerance
| O.D. Tolerance | W.T. Tolerance | ||
|---|---|---|---|
| X52 | |||
| 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 X52 Pipe Packing and Shipping
Packaging for API 5L X52 :
- Available in both seamless and welded types.
- Packaging includes loose pipes or bundles secured with iron strips.
- Special packaging options: metal or wooden cases, pallets, etc.
- Bundles up to 2,000 kg with steel strips, wrapped in waterproof paper, PVC sleeve, and sackcloth.
- Plastic caps provided.
Information on Each Bundle:
- Two tags on each bundle.
- Details on both sides of the container: order number, heat number, dimensions, weight, etc.
- Customized packaging available based on customer needs.
Export Packaging Features:
- Designed for air or sea freight.
- Emphasizes protection, handling, and transport.
- Ensures ease of handling during long-term storage.
- Careful consideration for acceptability of foreign packaging standards
Delivery Condition of API 5L X52
| PSL | Delivery Condition | Pipe Grade |
|---|---|---|
| PSL1 | As-rolled, normalizing rolled, thermomechanical rolled, thermo-mechanical formed, normalizing formed, normalized, normalized, and tempered | X52 |
| PSL2 | Normalizing rolled, normalizing formed, normalized or normalized, and tempered | X52N |
