API Pipe X52 is a steel pipe and is commonly used for pipeline transportation systems in the petroleum and natural gas industries. 
 API 5L is suitable for oil and gas transmission, structural application, and mechanical components.

Trio Steel is a leading manufacturer, supplier and exporter of API Pipe X52.We supply and stock a full range of API Pipe X52. 
All products we supply are conforming to industry-standards or exceeding API, ASTM, ASME, ANSI and other national and international standards.

All API Pipe X52 pipes are individually covered so that the premium quality of material is retained and there are no damages in the last stages of production.

API Pipe X52 comes with imprints relevant to the job information (for example heat number, size, material and part number). This information is also printed along all to whom API Pipe X52 is delivered.

Your need for API Pipe X52 of standard length and diameter pipes and tubing ends here. If you need high strength, high tensile, heavy wall line pipe requirements for deep sour wells, drilling, offshore drilling and production, arctic exploration and production, or you need API Pipe X52 for natural gas, oil or water transport, then Trio Steel can meet the demands of your company.

API Pipe X52 (enhanced) is a high yield seamless pipe that is modified to suit offshore structural purposes.
 It is intended for (but not limited to) use in fixed offshore structures and is designed to operate in the offshore sector.

Grade: API Pipe X52 L360

  • X
  • The x symbol followed by a two or three digit number equal to the specified minimum yields strength in 1000 psi rounded down to the nearest integer.
  • Minimum Yield
  • At pipe body 360 MPa (52200 psi)
  • Delivery Condition
  • +N Normalizing rollingQ Quenched and tempered
    where +Q refers to a heat treatment
    process consisting of quench
    hardening followed by tempering
  • PSL
  • PSL refers to product specification level,
    where PSL 1 mentions the minimum mechancial requirement

Applicable codes and standards
 API 5L, 45th Edition / ISO 3183 
Specification for line pipe – technical delivery conditions. 

Size: ¼” to 36”
Wall Thickness: SCH 10 to 160, STD, XS, XXS
Length: up to 12 Meters

*Additional testing requirements met*: NACE MR
the products.

C Si MN P S V Nb Ti Other Carbon Equivalent
Max (b) Max Max (b) Max Max Max Max Max % maximum
0.26 1.40 0.030 0.030 (d) (d) (d) (a)
Tensile Requirements on Pipe body of welded pipes Ratio Elongation CVN Absorbed Energy Heat Treatment
Yield Strength (R10.5) Tensile Strength (R) R 10.5/ R % 0 degree celsius
PSI Mpa PSI Mpa Max Minimum Min J Min ft. lb Wield Seam & HAZ Normalizing
52,200 min 360 min 66,700 min 460 min


27 20


  1. 0.50% maximum for copper; 0.50% maximum for nickel; 0.50% maximum for chromium and 0.15% maximum for molybdenum. For grades up to and including X52, Cu, Cr and Ni shall not be added intentionally.
  2. For each reduction of 0.01% below the specified maximum concentration for carbon, an increase of 0.05% above the specified maximum concentration for manganese in permissible, up to a maximum of 1.65% for grades ≥ B, but ≤ X52; up to a maximum of 1.75% for grades > X52, but
  3. Unless otherwise agreed, the sum of the niobium and vanadium contents shall be ≤ 0.06%.
  4. The sum of the niobium, vanadium and titanium concentrations shall be ≤ 0.15%
  5. Unless otherwise agreed.
  6. Unless otherwise agreed, the sum of the niobium, vanadium and titanium concentrations shall be ≤ 0.15
  7. Unless otherwise agreed, the sum of the niobium and vanadium contents shall be ≤ 0.06%.
  8. The sum of the niobium, vanadium and titanium concentrations shall be ≤ 0.15%
  9. Unless otherwise agreed.
  10. Unless otherwise agreed, the sum of the niobium, vanadium and titanium concentrations shall be ≤ 0.15%

Other details


  1. All surfaces have been 100% visually inspected. The surface condition complies with API 5L standards.
  2. External surface of pipe shall be coated with a layer of varnish.


All pipes will be ultrasonic tested on pipe body and pipe end as per API 5L standards:

  1. longitudinal: 100% of the pipe surface
  2. pipe ends not scanned by automatic ultrasonic system shall be inspected by manual UT or Magnetic Particle Examination.

Certification and traceability

All dimensions will be supplied with a 3.2 certificate according to EN 10204, endorsed by recognized and independent inspection agency. Marking shall be in SI units (X52) accordance with API requirements & mill standard.

Dimensional control

All dimensions will be supplied according to API 5L clause 9.11; In addition, the following tolerances apply:

  1. Pipe body: +/- 0,75%
  2. Pipe end: +/- 0,5%
  3. Wall thickness: +15%, -12,5%
  4. Length: -0 / +100mm

Pipe Ends

Pipe Ends are bevelled. End angle shall be 30°- 0°/+5°, root face shall be 1.6mm +/- 0.8mm and fitted with bevel protectors.


Pipes are varnished on the outside.

Origin of material (Make)

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