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Pressure System Question
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Kenny403  
#1 Posted : 21 July 2016 13:57:04(UTC)
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Kenny403
Can some one please help with a query I have regarding the use of a Pipe Fitting Training Rig. Once the rig is complete, the instructor will then, using a manual pressure pump, pressure the system to anything up to 3 bar ( 1 bar the norm)n to test the system for leaks Is this still classed as a simple pressure system and so come under those Regs rather than the Pressure System Safety Regs? Getting myself confused here, if I am honest.
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walker  
#2 Posted : 21 July 2016 14:00:29(UTC)
Rank: Super forum user
walker
what with? Liquid or gas?
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Kenny403  
#3 Posted : 21 July 2016 14:10:15(UTC)
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Kenny403
Sorry, just with water
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Kenny403  
#4 Posted : 21 July 2016 14:16:18(UTC)
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Kenny403
He would also use air, to the same pressures
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walker  
#5 Posted : 21 July 2016 14:28:22(UTC)
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walker
Air, because it is compressible and thus stores energy is far more dangerous For comparison, a legal air gun is less than 1 bar Suggest you do not permit the use of air.
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hilary  
#6 Posted : 21 July 2016 14:42:08(UTC)
Rank: Super forum user
hilary
Agree with Walker, if you can get away with hydrotest then it's not a problem because you cannot compress water. When it leaks it is more a dribble than an explosion. Compressed air is a whole different ball game and quite dangerous.
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Ian Bell2  
#7 Posted : 21 July 2016 15:16:38(UTC)
Rank: Super forum user
Ian Bell2
Not done much with PSSR for a while. But if just a water system then water isn't a 'relevant fluid' See ACOP L122 page 11. PSSR won't apply
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Xavier123  
#8 Posted : 21 July 2016 15:18:09(UTC)
Rank: Super forum user
Xavier123
Just playing Devil's Advocate, and also still failing to answer the OP query...the use of water, whilst being safer during the testing phase, can create issues for some pipework later on as corrosion is kickstarted. This could contribute to legionella biofilm proliferation further down the line......worth a thought depending on the future use of the said pipework and looking at relative risk. Sorry, am genuinely not sure about the Pressure System Safety Regs query off the top of my head.
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