1. Material category
API 5L X56 is a pipeline material used for pipeline transportation of oil, natural gas, etc. It is a type of pipeline steel with special requirements, which can meet the use requirements of long-distance pipelines such as oil and natural gas and process pipelines of petrochemical enterprises.
2. Correspondence
In the API 5L standard, X56 corresponds to L390. For example, L390MS acid-resistant wide and thick steel plate for oil and natural gas transmission pipes corresponds to the American standard material API 5L X56MS.
3. Grade
In the API 5L standard pipeline material system, X56 belongs to the PSL1 grade material, and there are also X56N/L390N, X56Q/L390Q, etc. corresponding to the PSL2 grade, and X56NS/L390NS, etc. corresponding to the acid pipeline material.
4. Chemical composition
Take L390MS (corresponding to API 5L X56MS) as an example, its chemical composition requirements are C≤0.24, Si≤0.45, Mn≤1.4, V≤0.10, Nb≤0.05, S≤0.15, P≤0.025, Ti≤0.04 3.
5. Application scope
Since the API 5L standard is used all over the world, API 5L X56 pipeline pipe is widely used in long-distance pipelines such as oil, natural gas, coal gas, water, and process pipelines of petrochemical enterprises, urban centralized heating pipelines, gas pipelines and other projects.
6. Production and standard implementation
The pipeline pipe of this material can be produced by different manufacturers, and the production process includes hot perforation, etc. It can also be formed into large-diameter steel pipes by spiral welding or UOE straight seam welding. The products comply with GB/T8162, GB/T8163, GB/T3087, SY/T5037, GB/T9711, API 5L, ASTM, BS1387 and other standards
