This NPR includes recommendations for inservice inspection and recertification of ground based, unfired pressure vessels and all pressurized systems including those served by fired pressure vessels hereinafter referred to as pressure vessels, systems, and components of systems.

It covers the vast array of ground based industrial and special purpose pressurized components and systems used at NASA Centers for research and development and those utility systems and components that require more than routine maintenance to insure continued structural integrity for their useful life. Through surveillance and correction of inservice deterioration, NASA will maintain a safe working environment for their own and contractor personnel, safety for the public sector, and protection against loss of capital investment.

a. This NPR is published for the purpose of establishing an outline of inservice inspection and recertification procedures for ground based, unfired pressure vessels and systems. It shall not replace the normal routine repair and maintenance programs now in effect. (Requirement 30497)

b. Recommendations for categorizing systems and components, baseline inspection and recertification time intervals are presented in tabular form and a type and format of documentation is recommended.

APPLICABILITY. It is intended that each NASA Center use this NPR and other applicable documents to define the detailed requirements and procedures for the specific vessels and systems over which it has cognizance.