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Definition

API 510 / 570 / 653

American Petroleum Institute inspection codes: 510 (pressure vessels), 570 (piping systems), 653 (aboveground storage tanks). Required inspection intervals driven by corrosion rate, criticality, and service.

Related terms

Attitude Control SystemACS

The subsystem responsible for maintaining and changing the orientation of a spacecraft. Includes sensors (star trackers,...

Apogee

The point in an orbit farthest from the central body. For Earth orbits, the highest altitude above Earth's surface....

Argument of Periapsis

The angle from the ascending node to the periapsis of the orbit, measured in the orbital plane in the direction of motio...

Atomic OxygenAO

Highly reactive oxygen atoms present in the upper atmosphere that erode polymer surfaces on LEO spacecraft. Drives mater...

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