Tempered Water for Safety Showers

[tcampbe1]

Does anyone have any experience with this? I have 10 - 14 PSIG steam and three showers to feed, two of which could be flowing. Everything I find is big, complicated and expensive. Looking for a simple, efficient solution.

 

[quark]

Hose down stations by Spirax Sarco (or any another company), if you can mix the steam with shower water. Otherwise, jacketed tanks with continuous recirculation is the cheaper option.

 

[PEDARRIN2]

Leonard has a steam/water mixing valve, although these are not commonly used for safety showers.

Make sure you have the flows and heating capacity required. Safety showers should be able to be supplied with tepid (not tempered) water for up to 15 minutes.

 

[JLSeagull]

I have seen memos advising that steam heated safety showers worked poorly. Problems included freezing and relief valves popping. These were replaced with electric heat.

Searching my saved files resulted in an add from

http://www.enconsafety.com.

Searching standards, I am surprised to find no ASTM, NFPA or ASME standards for safety showers. Several DIN and European standards exist.

 

[unclesyd]

Hate to say it, but there are some standards for eyewash stations and safety showers. It has been my experience that the rules are strictly enforced.

One has to look at the possible uses of said shower to determine any temperature adjustment. Most of our exposures one would want the coldest water possible. I know very few chemicals that I would want warm or tepid water. In hot area we have continuous water flow within the shower standpipe in very hot areas. We have electric heater on some external showers. These are built in heaters by the supplier.

http://www.caloly-safety.com/info_firstaid_showers.cfm

 

[JLSeagull]

I found of "Industry Safety Equipment Association" Z358.1 2004 for Emergency eyewash and shower equipment but lack a copy or access via IHS.

 

[PEDARRIN2]

If you go to Guardian Equipment's website, they have a good document on how to meet the ANSI code. Bradley and Haws also make safety equipment.

The temperature is very important due to reactivity. Tepid water is defined as 60F-90F. So within that range, you should be able to find a good temperature. Most mixing valves for the safety systems are preset at 80F.

 

[MortenA]

Does it need to be tempered if its a safety shower - or are they used for normal showing also?

Best regards

MOrten