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Difference between API 5L PSL1 pipeline steel plate and API 5L PSL2 pipeline steel plate

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bebon steel and iron Ltd.,

Difference between API 5L PSL1 pipeline steel plate and API 5L PSL2 pipeline steel plate

API 5L pipeline steel generally refers to the executive standard of pipeline steel pipe, which is used to transport oil, steam and water extracted from the ground to oil and natural gas industrial enterprises. API 5L pipeline steel for pipeline steel pipe includes seamless steel pipe and welded steel pipe. At present, spiral submerged arc welded pipe (SSAW), longitudinal submerged arc welded pipe (LSAW) and resistance welded pipe (ERW) are commonly used in oil pipeline in China.

 

When it comes to API 5L pipeline steel, we all know that there are two standards under API 5L pipeline steel, API 5L PSL1 pipeline steel plate and API 5L PSL2 pipeline steel plate. Although there is only one word difference between them, the contents of these two standards are quite different.

 

1. API 5L pipeline steel is the abbreviation of product specification level. The product specification level of pipeline pipe is divided into API 5L PSL1 pipeline steel plate and API 5L PSL2 pipeline steel plate, and the quality grade is divided into API Spec 5L PSL1 and API Spec 5L PSL2. API Spec 5L PSL2 is higher than API Spec 5L PSL1.


The two specifications are not only different in inspection requirements, but also in chemical composition and mechanical properties. Therefore, when ordering according to API 5L, the contract terms must indicate the product specification level, that is, API 5L PSL1 pipeline steel plate or API 5L PSL2 pipeline steel plate, in addition to the usual indicators such as specification and steel grade. API Spec 5L PSL2 is more strict than API Spec 5L PSL1 in chemical composition, tensile properties, impact energy and nondestructive testing.


2. Impact performance is not required for API Spec 5L PSL1. For all steel grades except X80, the average value of Akv at 0of full size: longitudinal 41J, transverse27J. X80 steel grade, full size 0average value of Akv: longitudinal 101J, transverse68J.


3. The API 5L pipeline steel should be hydraulic tested one by one, and the standard does not stipulate that it is allowed to replace water pressure undamaged. This is also a big difference between API 5L pipeline steel standard and Chinese standard. API 5L PSL1 pipeline steel plate does not require NDT, API 5L PSL2 pipeline steel plate should be NDT one by one.


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