Max permissible surface temperature for drinking water boiler?
Max permissible surface temperature for drinking water boiler?
(OP)
What is the maximum permissible surface temperature for a self service water boiler intended for customer use in shops? The lid is stainless steel and gets to about 60C.
It will only be sold/used within the EU and is to be CE marked.
It will only be sold/used within the EU and is to be CE marked.





RE: Max permissible surface temperature for drinking water boiler?
http://www.osti.gov/energycitations/product.biblio.jsp?osti_id=4045882
http://www.emedco.com/emed2/prodGroupBT1.asp?dept_id=1014
http://www.tap-water-burn.com/pamphlet/abstract.htm
http://www.hotwater.com/../htmlbulletins/bul31.htm
There also lots more information on the web.
TTFN
RE: Max permissible surface temperature for drinking water boiler?
I looked up the standard we design to, EN 60335-1 but its definitions could be interpreted many ways. It talks of an acceptable rise above ambient of 60K for motor-operated appliances, but doenst have details on heating appliances or boilers.
Heres another link saying that it is down to good engineering practice. Talks of toaster walls getting to 200C
http://www.rospa.com/cms/STORE/Product%20Safety/temperature_files/temperature.htm
RE: Max permissible surface temperature for drinking water boiler?
But some of the points are absurd, e.g., that any item that is technically "unsafe" is illegal. So what about stoves? They are engineered as safe as possible, but ultimately generate temperatures far in excess of 200ÂșC, yet have not been banned by any governmental agency.
One cheesy approach is to look at what has been approved and what they've done to deal with that particular problem.
TTFN
RE: Max permissible surface temperature for drinking water boiler?
RE: Max permissible surface temperature for drinking water boiler?
In both those cases, the risk must be evaluated and mitigated appropriately.
TTFN
RE: Max permissible surface temperature for drinking water boiler?