API 5L steel plate is a carbon steel plate manufactured in accordance with the API 5L specification and is primarily used for oil and gas pipeline systems, pressure-containing components, and pipeline-related structural applications. It provides reliable strength, toughness, and weldability, making it suitable for fabricating line pipes, fittings, and supporting structures that require strict compliance with international pipeline standards.
Chemical & Mechanical Properties of of API 5L Steel Plate
|
Grade
|
Chemical Composition
|
Yield Strength
|
Tensile Strength
|
Yield to Tensile
|
Elongation
|
|
|
C
|
Si
|
Mn
|
P
|
S
|
V
|
Nb
|
Ti
|
min. (KSI)
|
min. (KSI)
|
Ratio (max)
|
%
|
|
API 5L X52
|
0.16
|
0.45
|
1.65
|
0.020
|
0.010
|
0.07
|
0.05
|
0.04
|
52
|
66
|
0.93
|
21
|
|
API 5L X56
|
0.16
|
0.45
|
1.65
|
0.020
|
0.010
|
0.07
|
0.05
|
0.04
|
56
|
71
|
0.93
|
19
|
|
API 5L X60
|
0.16
|
0.45
|
1.65
|
0.020
|
0.010
|
0.08
|
0.05
|
0.04
|
60
|
75
|
0.93
|
19
|
|
API 5L X65
|
0.16
|
0.45
|
1.65
|
0.020
|
0.010
|
0.09
|
0.05
|
0.06
|
65
|
77
|
0.93
|
18
|
|
API 5L X70
|
0.17
|
0.45
|
1.75
|
0.020
|
0.010
|
0.10
|
0.05
|
0.06
|
70
|
82
|
0.93
|
17
|
Applications of API 5L Steel Plate
- Used for oil, gas, and water transportation pipelines, especially in long-distance pipeline projects due to cost efficiency
- Applied as pipeline steel with good resistance to crack initiation and crack propagation
- Suitable for manufacturing line pipes, including sour service line pipes, with controlled toughness and chemical composition
FAQ – API 5L Steel Plate
Q1: What is API 5L steel plate used for?
API 5L steel plate is mainly used to manufacture line pipes, pipeline fittings, pressure-containing components, and structural parts for oil and gas transmission systems.
Q2: What grades are available for API 5L steel plate?
Common grades include API 5L X42, X52, X60, X65, and X70, with different strength levels to meet various pipeline design requirements.
Q3: What is the difference between API 5L steel plate and API 5L pipe?
API 5L steel plate is a flat product used for fabrication, while API 5L pipe is a finished tubular product directly used for transporting oil and gas.
Q4: Is API 5L steel plate suitable for welding?
Yes. API 5L steel plate has good weldability and is compatible with standard welding processes such as SAW, SMAW, and FCAW under proper welding procedures.
Q5: What delivery conditions are available for API 5L steel plate?
Typical delivery conditions include as-rolled (AR), normalized (N), and TMCP, depending on grade and project specifications.
Q6: Can API 5L steel plate be used in low-temperature environments?
Yes. With proper impact toughness testing, API 5L steel plate can be used in low-temperature and demanding service conditions.
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