A bourdon tube ruptured in a pressure gage after 528 hours of operation in a liquid H2 system. The alarm sounded, the system was isolated and then vented.
- Safety Systems
- Measurement / Sensing Device
The tube was 403 stainless steel, which is subject to hydrogen embrittlement. It is requested that all gauges that have bourdon tubes be replaced with 303 stainless steel.
A web-based resource developed by Sandia National Laboratories to provide data on hydrogen embrittlement of various materials is available at Technical Reference for Hydrogen Compatibility of Materials.