Oxygen System and Component Cleaning and Packaging
|Publication Date:||1 March 1999|
This SAE Aerospace Recommended Practice (ARP) provides recommended practices for cleaning aircraft oxygen equipment such as tubing, pieces parts (including regulator and valve parts), cylinders and ground-based equipment that may be used to support aircraft oxygen systems. These methods may apply to gaseous and liquid oxygen equipment. This document specifies work area details, methods to select suitable cleaning chemicals, cleaning methods, test methods to verify cleanliness level, and methods of packaging the components and parts after cleaning. Person designated to clean oxygen equipment should be qualified and trained to clean oxygen equipment. Cleanliness levels achieved are strongly dependent on the capabilities of the persons performing the cleaning operation.
The purpose of this document is to provide recommended methods to clean aircraft oxygen equipment and ground-based equipment to support aircraft oxygen systems. It is desirable to keep combustion hazards within an acceptable level of risk. Combustion hazards are discussed in AIR825/13. Even very small amounts of contamination can pose combustion hazards in oxygen equipment. Contamination may also cause improper operation of moving parts or block or restrict the flow of oxygen when the components are assembled. When oxygen parts and tubing are manufactured, hydrocarbon oils may be used. Parts may also collect contamination while in storage or shipment. Parts may have undesirable residue from corrosion treatments. When cleaned, parts may also have cleaning chemicals that may be combustible. All this contamination must be removed. This document outlines minimum accepted practices to clean oxygen parts. It is intended that oxygen equipment cleaning operations not only be suitable to preclude toxic and fire hazards, but also be cost effective.