API 5L X65 Line Pipe


  • Size: Nominal Pipe Size 1/2″ to 48 ” O.D; Length: 5m to 12m.
  • Wall Thickness – Schedule 10 through 160, STD, XS, XXS.
  • Product Specification Level (PSL) : PSL 1,PSL 2
  • Manufacturing process: SSAW, LSAW, ERW welded/Seamless
  • Ends: Plain, beveled Ends and Threaded Ends

The American Petroleum Institute specification API 5L is designed for transportation systems in the petroleum and natural gas industries for conveying gas, water, and oil. API 5L X65 is a steel grade of API 5L which specifies the manufacture of two product levels (PSL1 and PSL2) line pipe. WLD Steel also provides internal & external coating like Black paint, varnished, FBE coating, 3LPE coating and all lined pipe on steel pipes as per the customers’ requirement. WLD steel supply and manufactured a large inventory of  API 5L X65 steel pipe in PSL1 and PSL2.

API 5l X65 Equivalent

API 5L Specification for line pipe
Material Grade PSL1 L450 or x65
Material Grade PSL2 L450Q or X65Q
L450M or X65M

API 5l X65 Chemical Composition

Grade C Si Mn P S
API X65 0.16 0.45 1.65 0.020 0.010
X65 PSL 1 0.28 0.45 1.2-1.4 0.03 0.03
X65Q PSL2 0.18 0.45 1.7 0.025 0.015

API 5l X65 Mechanical Property

Grades Yield Strength Tensile Strength Elongation,(in 2in)
x65 PSL 1 65,300 77,500 c
X65Q, X65M PSL 2 65,300-87,000 77,600-110,200 f

Differences between API 5L X65 PSL 1 and PSL 2

Charpy testing None required Required for all grades
Nondestructive inspection of seamless Only when the purchaser specifies   SR4 SR4 mandatory
Certification Certificates when specified per SR15 Certificates (SR 15.1) mandatory
Traceability Traceable only until all tests are passed, unless SR15 is specified Traceable after completion of tests (SR 15.2) mandatory
Hydrostatic Test Required Required