MIL-DTL-26633E
3.6 Cleaning instructions.
3.6.1 General cleaning instructions. Prior to and during assembly, metal chips, hose cuttings, and
other foreign material shall be removed during and after final assembly. Hose assembly components
shall be cleaned in accordance with the highest commercial standards. Precautions shall be used during
handling and assembly to preclude contamination of component parts. Final assembly and inspection
shall be done in a laminar-airflow clean work area whenever possible. Following completion of fabrication
and assembly operations, the hose assembly shall be thoroughly cleaned, see 3.6.2. The hose assembly
shall not be adversely affected by the cleaning method or procedures. The organization performing the
cleaning services shall have responsibility for all safety aspects of oxygen cleaning procedures.
Guidance for safe procedures can be found in ASTM G93.
3.6.2 Cleaning requirements. The hose assembly shall be cleaned in accordance with SAE-AS611
class II to assure compatibility with 99.5 percent purity oxygen at a pressure of 3,000 psig (206.84 bar)
and compliance with the cleaning effectiveness requirements of 4.8.12.
3.6.3 Pre-packaging. Immediately after cleaning and drying In accordance with 3.6.2, the end fittings
of each hose shall be capped or plugged with closures conforming to NAS 847. Handling and packaging
shall be in accordance with SAE-AS611, class II.
3.6.4 Coiling of hose assembly. Each hose assembly shall be coiled with a diameter not less than 10
inches.
3.7 Workmanship. All hose and hose assemblies shall be manufactured and processed in such a
manner as to be uniform in quality and shall be free from foreign material and other defects that will affect
life, serviceability, strength, assembly or durability see table I. Workmanship shall be such as to enable
the hose and hose assemblies to meet the applicable performance requirements of this specification.
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