Well I had a fun day looking for ANYTHING regarding "pressure relief".
Talk about a grey area !
Make of this what you will;
Closest thing i could find was the humble CO2 fire extinguisher.
Due to the fact its quite likely it'll be involved in a fire at some point its regulations differ from industrial bottles.
Quote:
Pressure vessels; Co2 type fire extinguishers.
All CO2 pressure vessels for the purposes of fire suppression should be fitted with a directly mounted pressure relief valve for the purposes of maintaining the pressure of the vessel to below that of the burst pressure of said vessel with an appropriate safety factor taken into account.
Industrial regulations for gasses stored in purpose made portable pressure vessels;
Best I could get was that the bottles
Quote:
are designed to withstand any and all reasonable circumstances without rupturing, in the specific instance of fire then the valve body is considered to be a "pressure relief device" since it will fail before the bottle from heat.
Typical gas bottles like the ones for heaters cookers etc supplied by Calor gas.
Quote:
Fitted with a "self resetting pressure relief valve" at a pressure setting of 50% the theoretical burst pressure of the bottle
I was wrong about Butane by the way, my bottle although a "proper" one is classed as "disposable" in the sense that the bottle is intended to fail as pressure relief, but since its thin steel it'll simply split open, not grenade itself like heavy steel.
The ones you would normally use in a "super-ser" heater have spring loaded
pressure relief valvesAnd if you think trying to find information on the bloody bottles was difficult, try the valves !
Nearest i could get was "Pressure vessel, pressure relief safety valves"
And i couldn't find a single mention of burst disks, only automatic self resetting pressure valves that are "fit for the purpose"
No mention of material, type or spec just "fit for purpose"
What is it about safety ? If it could involve someone getting hurt they bury it so deep you need to pipe in sunlight :roll:
I'm hoping to get hard copies of the above, or at least links to them.