Steel Pipe API5L PSL1 and API51 PSL2 Difference:
1, PSL is the abbreviation of product specification level. The product specification level of pipeline pipe is divided into PSL1 and PSL2, it can also be said that the quality level is divided into PSL1 and PSL2.
PSL2 is higher than PSL1, the 2 specification level is not only different inspection requirements, and chemical composition, mechanical properties requirements are also different, so according to the API 5L ordering, the terms of the contract, in addition to specifying the specifications, steel grade and other indicators of the usual, it must also indicate the product specification level, i.e., PSL. Must indicate the level of product specification, that is, PSL1 or PSL2.
PSL2 in the chemical composition, tensile properties, impact work, non-destructive testing and other indicators are stricter than PSL1.
2, PSL1 does not require to do the impact properties of PSL2 in addition to all the steel grades other than x80, have to do.
3, line pipe should be done branch by branch hydrostatic test, and the standard does not allow non-destructive substitution of hydrostatic pressure, which is also a big difference between the API standard and our standards. PSL1 does not require non-destructive testing, PSL2 should be non-destructive testing branch by branch.
Extended informationThe pipeline pipe is a hollow square cross-section steel pipe, also known as steel cooling bend profile. It is a hot-rolled or cold-rolled strip or coil as the parent material by cold bending process molding and then high-frequency welding made of square cross-section shape size of the steel section.
Hot rolled extra thick wall pipe line pipe in addition to wall thickness thickening outside the case, its corner dimensions and edge straightness meets or exceeds the resistance welding cold forming pipe line pipe price level.
The uses of line pipe are machinery and equipment manufacturing, glass curtain wall, marble curtain wall dry hanging, shipbuilding, cargo support, steel structure engineering, furniture manufacturing, medical equipment, agricultural and chemical machinery, automobile parts and so on.
Reference:Baidu Encyclopedia-Pipeline Pipe