Plan 99 (Special/Unclassified)
Special
Plan 99 defines an engineered piping plan not defined by any existing plans.
Why do we use it?
- When the needs of the seal exceed the capabilities of an API piping plan
General:
The description and requirements of this plan must be clearly defined in specifications outside API 682 but wherever possible, applicable requirements should be incorporated in the new piping plan.
Seals applicable to this plan
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