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NASA-LLIS-0063
Lessons Learned - Overheated Baking/curing Oven Temperature Control
Year: 1992
Abstract: Description of Driving Event:
During the cerachrome insulation baking process of three injector/chamber assemblies, severe oxidation of the assemblies was observed. The required baking temperature, per MTS 1324, is 600 deg F for 48 hours. It was discovered that the oven had failed, allowing the temperature to reach an estimated 1400 deg F. A proposed design change will reduce the possibility of this happening again. The modification incorporates a direct 440 VAC cut-off initiated by series redundant overtemperature shutoff circuits, as well as, a series redundant shutoff of the temperature control.
During the cerachrome insulation baking process of three injector/chamber assemblies, severe oxidation of the assemblies was observed. The required baking temperature, per MTS 1324, is 600 deg F for 48 hours. It was discovered that the oven had failed, allowing the temperature to reach an estimated 1400 deg F. A proposed design change will reduce the possibility of this happening again. The modification incorporates a direct 440 VAC cut-off initiated by series redundant overtemperature shutoff circuits, as well as, a series redundant shutoff of the temperature control.
Subject: Hardware
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| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T16:48:00Z | |
| date available | 2017-09-04T16:48:00Z | |
| date copyright | 03/06/1992 | |
| date issued | 1992 | |
| identifier other | WGYCQCAAAAAAAAAA.pdf | |
| identifier uri | https://yse.yabesh.ir/std/handle/yse/111427 | |
| description abstract | Description of Driving Event: During the cerachrome insulation baking process of three injector/chamber assemblies, severe oxidation of the assemblies was observed. The required baking temperature, per MTS 1324, is 600 deg F for 48 hours. It was discovered that the oven had failed, allowing the temperature to reach an estimated 1400 deg F. A proposed design change will reduce the possibility of this happening again. The modification incorporates a direct 440 VAC cut-off initiated by series redundant overtemperature shutoff circuits, as well as, a series redundant shutoff of the temperature control. | |
| language | English | |
| title | NASA-LLIS-0063 | num |
| title | Lessons Learned - Overheated Baking/curing Oven Temperature Control | en |
| type | standard | |
| page | 2 | |
| status | Active | |
| tree | NASA - National Aeronautics and Space Administration (NASA):;1992 | |
| contenttype | fulltext | |
| subject keywords | Hardware | |
| subject keywords | Packaging Handling Storage | |
| subject keywords | Parts Materials & Processes |