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About us
Tianjin lefin Industrial
TIANJIN LEFIN STEEL GROUP containing Tianjin lefin Industrial Co.,Ltd. 、Tianjin lefin steel import & export Co.,Ltd and Tianjin Shengqifeng International Trading Co., Ltd. -
Products
Steel Pipe Processing
Our main products include 1/2inch to 16 inch ERW PIPE/GI PIPE which has been produced according to BS1387/ASTM A53/EN10219/EN10255/EN10217 Standard -
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Service Capability
Guarantee Quality
Our steel pipes are suitable for oil, natural gas, shipbuilding, chemical industry, water conservancy, electrical, steel structure, construction and other related fields.
Our main products include 1/2inch to 16 inch ERW PIPE/GI PIPE which has been produced according to BS1387/ASTM A53/EN10219/EN10255/EN10217 Standard
Our main products include 1/2inch to 16 inch ERW PIPE/GI PIPE which has been produced according to BS1387/ASTM A53/EN10219/EN10255/EN10217 Standard
Has rich experience in steel pipe processing, can be customized according to customer requirements according to the drawing and sample processing, assist in the development of new products.
Product Description
Basic Information
API 5L PSL1
Grades: Grade A, Grade B, A25, X42, X46, X52, X56, X60, X65, X70
Product Specification Level: PSL1, PSL2
Outer Diameter Range: 1/2" to 2", 3", 4", 6", 8", 10", 12",16 inches, 18 inches, 20 inches, 24 inches up to 40 inches.
Thickness Schedule: SCH 10. SCH 20, SCH 40, SCH STD, SCH 80, SCH XS, to SCH 160
Manufacturing Types: SMLS, ERW, SAW
Ends Type: Beveled ends, Plain ends.
Surface Treatment: Bare, Varnished, Black Painting, FBE, 3PE (3LPE), 3PP, CWC (Concrete Weight Coated) CRA Clad or Lined.
Chemical Composition
API 5L PSL1 | ||||
Chemical composition (casting or product analysis) % max. | ||||
Grade | C | Mn | P | S |
A25/L175 | 0.21 | 0.60 | 0.030 | 0.030 |
A/L210 | 0.22 | 0.90 | 0.030 | 0.030 |
B/L245 | 0.26 | 1.20 | 0.030 | 0.030 |
X42/L290 | 0.26 | 1.30 | 0.030 | 0.030 |
X46/L320 | 0.26 | 1.40 | 0.030 | 0.030 |
X52/L360 | 0.26 | 1.40 | 0.030 | 0.030 |
X56/L390 | 0.26 | 1.40 | 0.030 | 0.030 |
X60/L415 | 0.26 | 1.40 | 0.030 | 0.030 |
X65/L450 | 0.26 | 1.45 | 0.030 | 0.030 |
X70/L485 | 0.26 | 1.65 | 0.030 | 0.030 |
Carbon (C) :
Carbon is the main element that affects the strength and hardness of steel.
Manganese (Mn) :
Manganese is an important element for improving the strength and hardness of steel, while also helping to eliminate the adverse effects of sulfur.
Phosphorus (P) and sulfur (S) :
Phosphorus and sulfur are harmful elements in steel, which reduce the plasticity and toughness of steel.
Physical Requirements
API 5L PSL1 | ||
Grade | Minimum yield strength | Minimum tensile strength |
A25/L175 | 175 | 310 |
A/L210 | 210 | 335 |
B/L245 | 245 | 415 |
X42/L290 | 290 | 415 |
X46/L320 | 320 | 435 |
X52/L360 | 360 | 460 |
X56/L390 | 390 | 490 |
X60/L415 | 415 | 520 |
X65/L450 | 450 | 535 |
X70/L485 | 485 | 570 |
API 5L
The API 5L Pipeline Steel Pipe standard specification was developed by the American Petroleum Institute (API), which specifies two product classes: API 5L PSL1 and API 5L PSL2, which have clear differences in mechanical properties:
1. Yield and tensile strength:
- PSL1: For different steel grades, there are clear minimum requirements for the yield strength and tensile strength of PSL1, but there is no maximum limit. For example, the yield strength of A25 steel grade is 172 MPa and the tensile strength is 310 MPa; The yield strength of the X70 steel grade is 483 MPa and the tensile strength is 565 MPa.
- PSL2: The yield strength and tensile strength of PSL2 have maximum limits in addition to minimum requirements. For example, the yield strength range of grade B steel is 290-496 MPa, and the tensile strength range is 414-758 MPa; The yield strength range of the X70 steel grade is 552-690 MPa and the tensile strength range is 621-827 MPa.
2. Impact test:
- PSL1: The impact performance test is not required.
- PSL2: For all steel grades except X80, the average Akv value of the full size 0 ° C: longitudinal ≥41J, transverse ≥27J. X80 steel grade, full size 0℃ Akv average: longitudinal ≥101J, horizontal ≥68J.
3. Non-destructive testing:
- PSL1: Non-destructive test by branch is not required.
- PSL2: Non-destructive inspection, such as ultrasonic and X-ray inspection, should be carried out one by one to ensure the safety and integrity of the pipeline.
4. Hydraulic test:
- PSL1: Water pressure test is not mandatory.
- PSL2: Hydraulic tests need to be carried out one by one, and non-destructive testing cannot be used to replace hydraulic testing.
5. Carbon Equivalent (CEV) limits:
- PSL2: Limits the carbon equivalent content, where the carbon mass fraction is greater than 0.12%, equal to or less than 0.12%. Different CEQ's should be used. For PSL2 pipe lines, there is a maximum limited tensile strength
Differences between API 5L PSL1 & API 5L PSL2
1. Yield and tensile strength:
- PSL1: For different steel grades, there are clear minimum requirements for the yield strength and tensile strength of PSL1, but there is no maximum limit. For example, the yield strength of A25 steel grade is 172 MPa and the tensile strength is 310 MPa; The yield strength of the X70 steel grade is 483 MPa and the tensile strength is 565 MPa.
- PSL2: The yield strength and tensile strength of PSL2 have maximum limits in addition to minimum requirements. For example, the yield strength range of grade B steel is 290-496 MPa, and the tensile strength range is 414-758 MPa; The yield strength range of the X70 steel grade is 552-690 MPa and the tensile strength range is 621-827 MPa.
2. Impact test:
- PSL1: The impact performance test is not required.
- PSL2: For all steel grades except X80, the average Akv value of the full size 0 ° C: longitudinal ≥41J, transverse ≥27J. X80 steel grade, full size 0℃ Akv average: longitudinal ≥101J, horizontal ≥68J.
3. Non-destructive testing:
- PSL1: Non-destructive test by branch is not required.
- PSL2: Non-destructive inspection, such as ultrasonic and X-ray inspection, should be carried out one by one to ensure the safety and integrity of the pipeline.
4. Hydraulic test:
- PSL1: Water pressure test is not mandatory.
- PSL2: Hydraulic tests need to be carried out one by one, and non-destructive testing cannot be used to replace hydraulic testing.
5. Carbon Equivalent (CEV) limits:
- PSL2: Limits the carbon equivalent content, where the carbon mass fraction is greater than 0.12%, equal to or less than 0.12%. Different CEQ's should be used. For PSL2 pipe lines, there is a maximum limited tensile strength.
Address: Hengtai Road,Daqiuzhuang Town,Jinghai County,Tianjin,China
Mob: +8615122229899(whatspp)
Phone: +86 22 58171905
Fax: +86 22 58171902
E-mail:info@lefinsteel.com
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