API X65 X56 X45 X42 DN2000 LSAW Pipe
API 5L X65 pipe is also called ISO 3183 L450 pipe, it is a high level grade pipe in API 5L (ISO 3183) specifications, used for oil and gas transmissions. The reason we call it X65 pipe or L415 pipe is because it's minimum yield strength required in 65000 Ksi or 450 Mpa.
API 5L has grades from B to X70 in common use pipelines, so Grade X65 pipe is one of the premium class material.
Same with other API 5L pipe, X65 pipe has two product specification levels of PSL1 and PSL2, and in some cases required for sour service use.
API 5L X65 Pipe Specifications
Though X65 pipe is a premium grade material, still it is carbon steel pipe not alloy pipe. It's specifications and performances comply to carbon steel scope.
For X65 PSL1 and PSL2 types, chemical properties as follows,
Steel grade (Steel name) |
Mass fraction,based upon heat and product analyses |
% |
c |
Mn |
|
s |
max |
max |
max |
max |
PSL1 pipe with t≤ 25.0 mm(0.984 in) |
Seamless pipe |
X65 |
0.28 1.40 |
0.03 |
0.03 |
Welded pipe |
x65 |
0.26 1.45 |
0.03 |
0.03 |
PSL 2 pipe with t≤25.0 mm(0.984 in) |
Seamless pipe |
x65Q |
0.18 1.70 |
0.025 0.015 |
Welded pipe |
|
X65M |
0.12 1.60 |
0.025 |
0.015 |
Mechanical Properties as follows,
Mechanical Properties |
pipe grade |
Pipe body of seamless and welded pipes |
|
Yield strength |
Tensile strength |
Tensile strength |
MPa (psi) |
MPa (psi) |
MPa(psi), min |
API5L X65 PSL1 pipe |
535(77 6oo) |
X65 |
minimum |
minimum |
450 (65 300) |
535(77 60o) |
APISL X65 PSL2 pipe |
x65Q
X65M |
minimum |
maximum |
minimum |
maximum |
450(65 30o) |
600 (87 0oo) |
535(77 6o0) |
760(110 200) |
API 5L X65 pipe for sour service use is more strictly than above two grades, so when refers to sour service pipe, it shall comply all of the PSL2 pipe requirements.
Standard and Grades: API 5L X65 Q/M/MS/QS
Product Specification Level: PSL1, PSL2, Onshore and Offshore
Material for Sour Services: Low Carbon and Sulfur, for sour service, complied to NACE MR 0175
Working Conditions: H2S corrosion
Manufacturing processes: Seamless and welded (ERW, LSAW vs SSAW HSAW, DSAW)
OD range: 1" to 48".
Common Dimension Schedule range: SCH 20, SCH 40, SCH STD, SCH 80 SCH XS, SCH 160, SCH XXS.
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