General info about PSL 1 and PSL 2 Pipes,
What is the API pipes; This Standard is based on API Spec 5L, 46th Edition. In the preparation of this document, the technical committee maintained the concept of two basic levels of standard technical requirements for line pipe expressed as two product specification levels (PSL 1 and PSL 2). Level PSL 1 provides a standard quality level for line pipe.
What is the PSL 1 and PSL 2 Pipe,
Level PSL 2 has additional mandatory requirements for chemical composition, notch toughness and strength properties and additional NDT. Requirements that apply to only PSL 1 or to only PSL 2 are so designated. Requirements that are not designated to a specific PSL designation apply to both PSL 1 and PSL 2 pipe.
The technical committee also recognized that the petroleum and natural gas industry often specifies additional requirements for particular applications.
In order to accommodate such needs, optional additional requirements for special applications are available, as follows: ⎯ PSL 2 pipe ordered with a qualified manufacturing procedure (Annex B), the requirements of which have been enhanced to include verification detail of critical processes in the production of feedstock material.
line pipe manufacture and product testing and inspection; ⎯ PSL 2 pipe ordered with resistance to ductile fracture propagation in gas pipelines (Annex G); ⎯ PSL 2 pipe ordered for sour service (Annex H); ⎯ pipe ordered as “Through the Flowline” (TFL) pipe (Annex I); ⎯ PSL 2 pipe ordered for offshore service (Annex J);
What is the API pipes.The following new annex is added to this Standard. – Equations for threaded and coupled pipe and background equations for guided bend and CVN test (Annex P). The requirements of the annex apply only when specified on the purchase order. When pipe is ordered for dual or multiple applications, the requirements of more than one annex for special applications can be invoked.
Technical conflict arises,
In such instances, if a technical conflict arises due to applying the requirements of more than one annex for special applications, the most stringent requirement applicable to the intended service shall apply.
This Standard does not provide guidance on when it is necessary to specify the above supplementary requirements. Instead, it is the responsibility of the purchaser to specify, based upon the intended use and design requirements, which, if any, of the supplementary requirements apply for a particular purchase order.