STATEMENT_OF_WORK_Lox_Tank.pdf
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- Liquid Oxygen Tank Repair
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Performance Work Statement for LOX Tank Repairs
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| File | Type | Posted |
|---|---|---|
| LOX_Tank_CAPABILITIES_QUESTIONNAIRE.docx | DOCX document |
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STATEMENT OF WORK
Work:
The technician will have to fill the outer shell of the tank with Nitrogen to pop the top on the tank to get to the seals around the valve. They will then have to replace the seals (which will be provided by the 138FW), replace the valve, and then pull a vacuum on said tank to ensure the tank is holding a vacuum which is critical to house 3000 gallons of liquid oxygen.
T.O. 37C2-8-37-1
Replacing Jacket Safety 0-Rinq On tanks for atmospheric gases, it is entirely practical to replace 0-rings while the tank is in service.
To get to the jacket safety head, a ladder should be placed between the front lifting lug and the ladder lug on the top head.
The ladder should be securely tied.
Break vacuum with dry nitrogen, lift off the safety head cover, and remove the old 0-nngs. Be careful not to scratch the groove surfaces. Carefully clean the 0-ring grooves, the sealing surface of the cover and the new 0-rings. Coat the new 0-rings with a very thin layer of vacuum grease, place them in the grooves, and install the cover concentric with the grooved flange. Hold the cover down until there is enough vacuum to hold it.
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