API 5L X65 Line Pipe Material Specification:
Full range of line pipes of superior quality, including those of high strength, high toughness, homogeneous material and corrosion resistance, for various services such as onshore, offshore, shallow water and deep water, non-sour and sour services.
Main steel grades: Gr.B, X42, X46, X52, X56, X60, X65, X70, X80, X90, X100
PSL: PSL-1,PSL-2
Embrace the strength and resilience of API 5L X65 line pipes, tailored to endure extreme conditions and maintain structural integrity. Committed to PSL1/PSL2 specifications, these pipes deliver consistent mechanical performance and precise chemical composition. Opt for varying wall thicknesses and consult our schedule charts for effective project scheduling.
X65 line pipes are engineered for higher strength, making them an excellent choice for pipelines operating in challenging environments, such as deepwater and harsh climates. These pipes provide a robust solution for critical energy transport applications.
API 5L X65 Line Pipe Dimensions and Material Specifications:
United Steel Industry Co.,Ltd produces both seamless (SMLS) and ERW (HFI/HFW) line pipes.
SMLS: Outer Diameter from 2” to 28”, Wall Thickness from 4.0mm to 65.0mm
ERW: Outer Diameter from 5” to 26”, Wall Thickness from 3.2mm to 22.2mm
United Steel Industry Co.,Ltd manufactures full range of line pipes of superior quality, including those of high strength, high toughness, homogeneous material and corrosion resistance, for various services such as onshore, offshore, shallow water and deep water, non-sour and sour services.
The highest grades seamless line pipe United Steel can supply include:
- API X100Q for oil, gas, water and slurry services;
- X70QS for sour services;
- DNV 485 SFPDU under DNV-OS-F101 specification for subsea applications.
(S for Sour service, F for Fracture arrest, P for Plastic deformation, D for Dimension, U for high utilization)
API 5L X65 Chemical Composition and API 5L X65 Mechanical Properties:
|
Steel Standard |
Steel Grade |
Chemical Composition |
API 5L Mechanical Properties |
|||||
|
C |
Mn |
P |
S |
yield strength/Mpa |
Tensile Strength/Mpa |
Elongation % |
||
|
API 5L |
A |
0.21 |
0.6 |
0.03 |
0.03 |
207 |
331 |
0 |
|
B |
0.22 |
1.2 |
0.025 |
0.015 |
241 |
414 |
|
|
|
X42 |
0.22 |
0.025 |
0.015 |
1.3 |
290 |
414 |
|
|
|
X46 |
0.22 |
1.4 |
0.025 |
0.015 |
317 |
434 |
|
|
|
X52 |
0.22 |
1.4 |
0.025 |
0.015 |
359 |
455 |
|
|
|
X56 |
0.22 |
1.4 |
0.025 |
0.015 |
386 |
490 |
|
|
|
X60 |
0.22 |
1.4 |
0.025 |
0.015 |
414 |
517 |
|
|
|
X65 |
0.22 |
1.45 |
0.025 |
0.015 |
448 |
531 |
|
|
|
X70 |
0.22 |
1.65 |
0.025 |
0.015 |
483 |
565 |
|
|
|
GB/T9711-1997 |
L175 |
0.21 |
0.6 |
0.03 |
0.03 |
175 |
315 |
27 |
|
L210 |
0.21 |
0.9 |
0.03 |
0.03 |
210 |
335 |
25 |
|
|
L245 |
0.26 |
1.15 |
0.03 |
0.03 |
245 |
415 |
21 |
|
|
L290 |
0.28 |
1.25 |
0.03 |
0.03 |
290 |
415 |
21 |
|
|
L360 |
0.3 |
1.25 |
0.03 |
0.03 |
360 |
460 |
19 |
|
|
L390 |
0.26 |
1.35 |
0.03 |
0.03 |
390 |
490 |
18 |
|
|
L415 |
0.26 |
1.35 |
0.03 |
0.03 |
415 |
520 |
17 |
|
|
L450 |
0.26 |
1.4 |
0.03 |
0.03 |
450 |
525 |
17 |
|
|
L485 |
0.23 |
1.6 |
0.03 |
0.03 |
485 |
570 |
16 |
|
|
SY/T5037-2000 |
Q235B |
0.12-0.20 |
0.30-0.70 |
0.045 |
0.045 |
235 |
375-460 |
26 |
More elaboration about special service conditions for X65Q0/X65QS for line pipes: Special Service Condition
Dimension Standard of API 5L X65 Line Pipes:
To meet strict dimensional tolerances for offshore/subsea services, United steel can supply products to API, ISO, DNV standards, specifications of contractors, clients and project-specific. For references, dimensional tolerances listed in the following tables are for standard sizes of pipes.
Diameter and Out of roundness tolerances for offshore/Subsea line pipe
|
Diameter mm(in) |
Diamter Tolerance mm(in) |
Out of Roundness Tolerance |
||
|
Pipe Body |
Pipe end(I.D.) |
Pipe body |
Pipe end(I.D.) |
|
|
＜60.3(2.375) |
±0.5mm or ±0.0075D |
±0.5mm or ±0.005D |
0.9(0.036) |
0.6(0.024) |
|
≥60.3(2.375) |
≤0.015D |
≤0.01D |
||
Wall thickness, Straightness and length tolerances for offshore/Subsea line pipe
|
Wall Thickness mm(in) |
Tolerance mm(in) |
|
<4.0(0.157) |
+0.6(0.024),-0.5(0.020) |
|
4.0(0.157)≤t<10(0.394) |
+0.150t,-0.125t |
|
10.0(0.394)≤t<25.0(0.984) |
±0.125t |
|
t≥25(0.984) |
+3.7(0.146)or+0.1t , which is larger, |
|
Straightness, max for full length of pipe |
≤0.15%L |
|
Straightness, max deviation for pipe end |
≤3mm/m |
|
Length |
±200mm for general, |
3LPE Coating of API 5L X65 Line Pipe:
The external 3LPE coating is applied in accordance with DIN 30670-2012 standards. The anti-corrosion coating is typically black in color, and the minimum thickness of the external coating should be ≥2.5mm. It is essential for the coating to have continuity without any areas of leakage.
The following table outlines the testing methods and inspection rules for evaluating the quality of the external anti-corrosion coating:
|
No |
Inspection Item |
Sampling Quantity |
Sampling Location |
Testing Method |
|
1 |
Dimension |
Each Pipe |
- |
Caliper, wall thickness gauge, tape measure, plug gauge, angle gauge |
|
2 |
Appearance |
Each Pipe |
- |
Visual inspection |
|
3 |
Product Analysis |
2 per batch |
Random |
ASTM A751 |
|
4 |
Tensile Test |
1 per batch |
Alternating Ends |
ASTM A370 |
|
5 |
Impact Test |
1 set per batch |
Alternating Ends |
ASTM A370 |
|
6 |
Length and Weight |
Each Pipe |
- |
- |
|
7 |
Hydrostatic Test |
Each Pipe |
- |
API 5L |
|
8 |
Non-Destructive Testing |
Each Pipe |
- |
ASTM E213 |
|
9 |
Coating Thickness |
Each Pipe |
- |
DIN 30670 |
|
10 |
Pinholes/Leakage |
Each Pipe |
- |
DIN 30670 |
