chemter
Chemical
- Aug 18, 2005
- 25
Could someone please provide additional guidance on fusilbe plugs? Per ASHRAE 15-2001
"9.7.2.1 Pressure vessels with an internal gross volume
of 3 ft3 (0.085 m3) or less shall use one or more pressure relief devices or a fusible plug."
I understand that if a pressure vessel is stamped with a U or UM symbol, then it requires a code certified UV stamped pressure relief device or UD stamped rupture disk, per ASME Section VIII, Div. I. But if a pressure vessel is not stamped with these symbols and is used in a refrigeration service (such as a receiver for an HVAC unit) and has an internal gross volume less than 3 ft3, ASHRAE tells me I can use a fusible plug. Is this correct? Do most applications that fall within these guidelines use these fusible plugs or do code stamped relief valves tend to be used instead? I guess I'm looking for a little experience in dealing with how these small vessels are dealt with. Thank you.
"9.7.2.1 Pressure vessels with an internal gross volume
of 3 ft3 (0.085 m3) or less shall use one or more pressure relief devices or a fusible plug."
I understand that if a pressure vessel is stamped with a U or UM symbol, then it requires a code certified UV stamped pressure relief device or UD stamped rupture disk, per ASME Section VIII, Div. I. But if a pressure vessel is not stamped with these symbols and is used in a refrigeration service (such as a receiver for an HVAC unit) and has an internal gross volume less than 3 ft3, ASHRAE tells me I can use a fusible plug. Is this correct? Do most applications that fall within these guidelines use these fusible plugs or do code stamped relief valves tend to be used instead? I guess I'm looking for a little experience in dealing with how these small vessels are dealt with. Thank you.
