API 5L X52 Pipe Specifications

API 5L X52 pipe also called L360 Pipe, X52 (L360) named by minimum yield strength 52 Ksi (360 Mpa). It’s a medium grade in API 5L and ISO 3183 specifications, used for oil and gas pipeline transmissions.

API 5L X52 Pipe Types

Ranges by Product Specification Level: PSL1, PSL2, Sour Services

API 5L X52 PSL1, for the pipes in common delivery condition of As Rolled.
API 5L X52N/M/Q, for PSL2 pipe with delivery condition of N, M, and Q.
API 5L X52NS/MS/QS, for PSL2 pipes with sour services.

Suffix Letter Means

R: As rolled
N: Normalizing rolled, Normalized formed, Normalized
Q: Tempered and quenched
M: Thermomechanical rolled or thermomechanical formed
S: Sour Service

Ranges by Manufacturing Types

Seamless: Includes hot rolled seamless and cold drawn seamless.
ERW: Electric Resistance Welded, OD up to 24 inch.
DSAW/SAW: Double Sub-merged Arck Welding, substitute welding methods than ERW for larger diameter welded pipes.
LSAW: Longitudinal Sub-merged Arc Welding, also called JCOE pipe, OD up to 56 inch.
SSAW / HSAW: Spiral Sub-merged Arc Welding, or Helical SAW, OD up to 100 inch.

API 5L Grade X52 Pipe Specification

API 5L Pipe Data Sheet, other grades specifications in API 5L.
API 5L X52 Pipe Data Sheet, including PSL1, PSL2, and Sour Services.

API 5L X52 PSL1 Chemical and Mechanical Properties

Under X52 seamless pipe type, API 5L Grade X52 or L360 steel pipe chemical content is same with API 5L grade X42 or L320.

To be specified in details: Maximum content for C ≤ 0.28%, Mn ≤  1.4%, P  ≤ 0.030%, S 0.030%, V+Nb+Ti ≤ 0.15%; Copper maximum is 0.50%, nickel maximum 0.50%, chromium 0.50%, Molybdenum 0.15%.

It shall be noted that,

For grades higher or equal to X52/L360, these elements Cu, Ni, Cr shall not be added on any purpose.

For 0.01% reduce of the specified maximum content of C, an increase of 0.05% of Mn is allowed, until maximum of 1.65%. (This rule is applied for grades equal to and higher than Grade B or L245, but lower or equal to X52 or L360)

API 5L X52 PSL2 Pipe Data Sheet

X52, L360 PSL2 Chemical Composition

X52, L360 PSL2 Pipe Mechnical Properties

X52 PSL2 vs PSL1 Comparision

API 5L X52 (L360) PSL2 the maximum chemical content is different than PSL1; As well as the mechanical strength, is more strictly.

API 5L X52 Pipe Pressure Rating (Mechanical Strength)

API 5L grade X52 (L360 pipe) the yield strength minimum at 52220 Psi 360 Mpa, it’s the meaning that we call this grade in the API 5L X52 or L360. Tensile strength is 66700 Psi and 460 Mpa. X52 performance is better than Grade X46, X42, and Grade B. It is a second big requirements in oil and gas pipe systems.

Either x52 pipe in seamless or welded (ERW, LSAW), the pressure ratings, tensile strength and yield strength is the same

In case the working conditions require bigger pressure, we will have to increase the wall thickness of the steel pipes, or use higher grade in API 5L.

Test Requirements:

Hydrostatic Test: 100% hydrostatic test without leakage through the weld seam or the pipe body required. Connections or joints not need hydrostatic test if the pipe sections used were successfully tested.

Bend Test: No cracks should be occur in any part of the sample or opening of weld.

Flattening test: Flattening test used to prove the pipe performances under deformation. It shall show the resistance to longitudinal cracking and circumferential cracking, including internal and external defects.

It shall be perfored to ERW pipes which diameters above 12.75 inch;
For pipes OD/WT > 10, there shall be no opening of the weld before the distance between the plates is less than 30% of the original OD.

Guided-bend test: Fracture completely; Reveal any cracks or ruptures in the weld metal longer than 3.2 mm, regardless of depth. Or reveal in parent metal, HAZ or fusion line longer than 3.2mm or deeper than 12.5% of wall thickness.

CVN impact test: (Required PSL2 pipe, for seamless shall be tested with pipe body, for welded tests including pipe body, weld seam and heat-affected zon HAZ tests)
DWT test: (Required for PSL2 pipe)

Our Supply Ranges and Sizes

API SPECS 5L Gr. X52 or L415
Standard: API 5L, ISO 3183
Grade: X52 or L390 (Suffix letter N, Q, M, R)
Type seamless steel pipe: 21.3mm – 610mm, 1/2” – 24”
Welded ERW pipe: 21.3mm – 508mm, 1/2” – 20”
LSAW and SSAW pipe: 406mm – 2500mm, 16” – 100”
Pipe Thickness Schedule: SCH 10, SCH 20, SCH 30, SCH STD, SCH40, SCH60, SCH XS, SCH 80, SCH 100, SCH 120, SCH 140, SCH 160, SCH XXS of the standard thickness
Range of Length: SRL, DRL, 5 meter to 14 meter
Fixed Length: 5.8 Meter, 6.0 Meters (20FT), 11.8 Meters, 12.0 Meters (40FT)
Product Specification Level: PSL1, PSL2, Sour
Ends: Plain, Beveled Ends, Threaded Ends
Available Coating: Black Painting, Varnished, Anti-Rust Oil, FBE, 3PE/3LPE, 3PP, Galvanized

Standard description X52 pipe order specification for sample references

Item 1
3756 meters carbon steel pipe API 5L X52 PSL2 (ISO 3183 L-360N) OD 20” with type of LONGITUDINAL SUBMERGED ARC WELDING (LSAW), WT 0.562”, should provide with outer (external) coating SYSTEM EQUIVALENT BONDED EPOXY POWERED BY MERGE (FBE).

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