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Service, repair, modification, or removal of valves, pressure relief devices, or other container appurtenances shall be in accordance with nationally recognized codes and standards. [55:8.8]
63.4.8.1 Containers
Containers that have been removed from service shall be handled in an approved manner. [55:8.8.1]
63.4.8.1.1 Testing
Containers out of service in excess of 1 year shall be inspected and tested as required under 63.4.8.1.2. [55:8.8.1.1]
63.4.8.1.2 Pressure Relief Device Testing
The pressure relief devices shall be tested for operability and to determine if they are set at the relief pressure required by the tank design. [55:8.8.1.2]
63.4.8.1.3
Containers that have previously been used for flammable cryogenic fluids and have been removed from service shall be purged with an inert gas to remove residual flammable gas and stored with all valves closed and the valve outlets plugged. [55:8.8.1.3]
63.4.8.2 Systems
Service and repair of containers or systems shall be performed by trained personnel in accordance with nationally recognized standards and with the permission of the container owner. [55:8.8.2]
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