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API 5L ERW Welded Steel Pipes Line Pipe
Model: API 5L
Grade: Gr.B/ X42/ X52/ X60/ X65
Out Diameter:1/2″ – 24″ ( DN15 – DN600)
Wall Thickness: Sch40/ 80/ 120/ 160
Length:6M/ 12M or Customized
Surface: Black/ Varnish/ Galvanized/ 3PE/ 3LPP, etc
Advantage: high working efficiency and & very durable
Product Description
What is API 5L ERW Welded Steel Pipes?
API 5L ERW Welded Steel Pipes refers to a specific type of steel pipe manufactured for the energy industry, particularly for transporting oil, natural gas, and other fluids.
API 5L ERW Pipe is a carbon welded steel pipe as per the specification of The American Petroleum Institute, This steel pipe is produced in a welded and seamless form.
The API 5L ERW Steel Pipe is a low-cost piping option. This ERW pipe has high working efficiency and are very durable and it is easy to weld. So the demand of API Line pipe is increasing. They are available in nominal sizes between 1/2″to 24″.
API 5L welded steel pipe is more suitable for transportation of Oil and gas pipeline, water and also petroleum liquids, API 5L carbon steel pipe is also known as black steel pipe is widely used in oil drilling purpose. API 5L pipe is produced in two types PSL1 and PSL2, Most common grades of API 5L are API 5L GRB, API 5L x42, c46, x52, x56, x60, x65, x70 and x80, API 5L grade b is more economical and fast moving material.
API 5L X42 is the most common grade of carbon steel pipe used in industrial applications Especially, API 5L X42 is carbon steel grade designed for use in the petroleum industry due to its resistance to high-pressure.
API 5L ERW Line Pipes Specification
| NPS Designator | DN Designator | Outside Diameter | Wall Thickness | Weight Class | Schedule No. | Test Pressure, psi | |
| mm | mm | Grade A | Grade B | ||||
| 1/2″ | 15 | 21.3 | 2.77 | STD | 40 | 4.8 | 4.8 |
| 3.73 | XS | 80 | 5.9 | 5.9 | |||
| 4.78 | – | 160 | 6.2 | 6.2 | |||
| 7.47 | XXS | – | 6.9 | 6.9 | |||
| 6″ | 150 | 168.3 | 4.78 | – | – | 7.0 | 8.2 |
| 5.56 | – | – | 8.2 | 9.6 | |||
| 6.35 | – | – | 9.4 | 10.9 | |||
| 7.11 | STD | 40 | 10.5 | 13.0 | |||
| 7.92 | – | – | 11.7 | 13.7 | |||
| 8.74 | – | – | 12.9 | 15.0 | |||
| 9.52 | – | – | 14.1 | 16.4 | |||
| 10.97 | XS | 80 | 16.2 | 18.9 |
Typical Applications of API 5L Welded Line Pipe
- Onshore and offshore oil and gas pipelines
- Crude oil transportation
- Natural gas transmission and distribution networks
- Refinery pipelines
- Water transmission lines (especially those with demanding pressure or environmental conditions)
- Some structural applications where high-strength ERW steel pipe is required.
API 5L line pipe is the industry standard for pipelines worldwide due to its uncompromising reliability, safety, and performance in transporting vital energy resources.





