API 5L X65 Pipe Specifications

The table below summarises the core specifications of API 5L X65 pipe, covering applicable standards, sizes, forms, and delivery conditions.

Attribute Specification Details
Standard API 5L (46th Edition) / ISO 3183
PSL Levels PSL1, PSL2
Outside Diameter 2-3/8 inch (60.3 mm) to 60 inch (1524 mm)
Wall Thickness Per ASME B36.10 schedules and custom
Length SRL (5.8 to 7.6 m), DRL (11.0 to 12.8 m), Cut Length
Forms Seamless, ERW, LSAW, SSAW/HSAW
End Type Plain End, Bevelled End
Surface Finish Bare, 3LPE Coated, FBE Coated, 3LPP Coated
Delivery Condition X65M (TMCP), X65Q (Q&T), X65N (Normalising)

API 5L X65 Manufacturing Range & Size Availability

Check our different manufacturing methods and size requirements to find the best, most reliable option for your pipeline infrastructure needs.

Manufacturing Method Size Range (NPS) Outside Diameter (OD) Applicable Standard
Seamless (SMLS) 2" to 24" 60.3 mm - 610 mm ASME B36.10M / API 5L
ERW / HFW 2" to 24" 60.3 mm - 610 mm ASME B36.10M / API 5L
LSAW (Longitudinal) 16" to 60" 406 mm - 1,524 mm ASME B36.10M / API 5L
SSAW 16" to 100" 406 mm - 2,540 mm ASME B36.10M / API 5L

API 5L X65 Schedule & Wall Thickness Reference

Review our normal wall thickness configurations and weight classes. These ensure that your project meets every high-pressure safety requirement for the field.

Pipe Schedule Wall Thickness Category Thickness (Ex: 8" NPS) Relative Weight Class
SCH 20 / 30 Light Wall 6.35 mm - 7.04 mm Light Duty
SCH 40 / STD Standard Wall 8.18 mm Medium Duty
SCH 80 / XS Extra Strong 12.70 mm Heavy Duty
SCH 120 / 160 Heavy Wall 18.26 mm - 23.01 mm Extra Heavy Duty
XXS Double Extra Strong 22.23 mm Ultra-Heavy Duty

API 5L X65 Pipe Price

API 5L X65 pipe pricing rates average ₹70–₹125/kg in India and $1.05–$2.15/kg in the USA; seamless options typically command a premium over welded alternatives. It depends on dimensions, manufacturing method, and PSL level.

Chemical Composition of API 5L X65 Pipe

This table lists the maximum chemical composition limits for API 5L X65 pipe under PSL1.

PSL2 tightens these limits and adds mandatory carbon equivalent controls (CE IIW and Pcm). The microalloying elements provide grain refinement for high yield strength and field weldability.

Element / Max (%)

Carbon (C) C
Max 0.22%
Manganese (Mn) Mn
Max 1.45%
Phosphorus (P) P
Max 0.030%
Sulphur (S) S
Max 0.030%
Vanadium (V) V
Max 0.10%
Niobium (Nb) Nb
Max 0.05%
Titanium (Ti) Ti
Max 0.06%

Mechanical Properties of API 5L X65 Pipe

API 5L X65 pipe must satisfy the mechanical requirements below. PSL2 adds maximum strength caps and mandatory CVN impact testing that PSL1 doesn't require.

X65’s elevated yield strength allows engineers to reduce wall thickness at equivalent working pressures. This decrease in material weight lowers overall project costs for all of your high-pressure gearbox line installations today.

448-600
MPa
Yield Strength
531-758
MPa
Tensile Strength
18%
min
Elongation
Property Specification Details (PSL1 vs PSL2)
Yield Strength PSL1: 65 ksi (448 MPa) min / PSL2: 65–87 ksi (448–600 MPa)
Tensile Strength PSL1: 77 ksi (531 MPa) min / PSL2: 77–110 ksi (531–758 MPa)
Min. Elongation 18%
CVN Impact Testing PSL1: Not required / PSL2: Mandatory
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Equivalent Grades of API 5L X65 Pipe

API 5L X65 is recognised under multiple international standards. The table below lists regional equivalents.

Standard Designation
ISO 3183 L450NB / L450MB / L450QB
EN 10208-2 L450MB / L450QB
CSA Z245.1 Grade 448
GB/T 9711 L450
SY/T 6194 L450

API 5L X65 Pipe Industrial Applications

API 5L X65 line pipe is specified across 3 primary sectors in high-pressure pipelines and offshore services.

Oil and Gas Transmission Pipelines

X65 line pipe transports crude oil, natural gas, and refined products through high-pressure onshore trunk lines where wall thickness savings are critical.

Offshore and Subsea Pipelines

Offshore risers, flowlines, and subsea pipeline systems specify X65 PSL2 pipe with DNV-OS-F101 qualification for deep-water and sour service conditions.

Slurry and High-Pressure Water Transmission

Oil sands slurry pipelines and high-pressure water injection lines rely on X65 pipe for its resistance to erosion-corrosion at elevated flow velocities.

Shipping & Packaging

Main export packaging setup Heavy-duty wooden boxes Packing
Export Packaging Standard

We strictly follow seaworthy export handling standards to protect API 5L X65 pipe from transit damage, moisture ingress, and surface contamination during long-distance dispatch.

  • Heavy-duty wooden boxes with moisture barrier lining
  • HDPE stretch film wrapping on all bundles
  • Plastic end caps on threaded and plain-end pipes
  • Silica gel desiccants to minimize moisture exposure
  • ISPM-15 fumigated wooden packaging for export
shipping preparation Pipe Bundle Yard Staging
Shipping packaging Container End-Cap Protection
Shipping stock Wrapped Export-Ready Bundles

We Export Worldwide

Sachiya Steel International supplies carbon steel products to major industrial markets across North America, Europe, the Middle East, Asia and Africa with export-ready documentation and logistics support.

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Frequently Asked Questions: API 5L X65 Pipe

What is the difference between API 5L X65 PSL1 and PSL2? +
PSL1 sets standard chemical and mechanical requirements for general pipeline use. PSL2 adds maximum yield and tensile caps, mandatory carbon equivalent limits, CVN impact testing, and full traceability. Offshore, sour service, and critical pipelines require PSL2.
What are the mechanical properties of API 5L X65 Pipe? +
Minimum yield strength is 65 ksi (448 MPa) and minimum tensile strength is 77 ksi (531 MPa) with 18% elongation. PSL2 caps yield at 87 ksi (600 MPa) and tensile at 110 ksi (758 MPa). PSL1 doesn't impose upper limits.
What are the dimensions of API 5L X65 Pipe? +
Outside diameters range from 2-3/8 inch (60.3 mm) to 60 inch (1524 mm). Seamless pipe covers up to 24 inch NPS. LSAW and SSAW cover larger diameters up to 60 inch OD.
What is the ISO equivalent of API 5L X65? +
API 5L X65 is equivalent to ISO 3183 L450. Delivery condition variants include L450NB (normalised), L450MB (thermomechanical), and L450QB (quenched and tempered).
What is the chemical composition of API 5L X65 Pipe? +
Key PSL1 limits are carbon 0.26% max, manganese 1.45% max, phosphorus 0.030% max, and sulphur 0.030% max. Microalloying elements vanadium, niobium, and titanium provide grain refinement.
What is the difference between X65M, X65Q, and X65N? +
X65M is thermomechanically rolled (TMCP), the most common delivery for modern pipelines. X65Q is quenched and tempered, specified where toughness requirements are demanding. X65N is normalising rolled for select applications. All three are PSL2 delivery conditions.
Where can I buy API 5L X65 Pipe? +
Sachiya Steel International supplies API 5L X65 pipe in all manufacturing types and PSL levels from ready stock. We provide mill test certificates, third-party inspection, and global shipping. Contact us for availability and pricing.
What standards apply to API 5L X65 Pipe? +
API 5L X65 conforms to API 5L, ISO 3183, EN 10208-2, CSA Z245.1, GB/T 9711, and DNV-OS-F101 for offshore applications. Sour service pipe meets NACE MR0175/ISO 15156.

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