Pressure Gauges

[macmet]

I was asked by a customer the other day how often their boiler's water pressure gauge should be calibrated. I have never been asked this or looked into it before, does anyone have any idea?

This boiler is in Canada.

Let me know if you need any further information.

 

[Cuemaster64]

macmet,

I would tend to think that at a bare minimum it would have to be annualy. I would also surmize that if your clients certification is coming due it would be a good time to get them calibrated. Through my QC manual all my testing equipment has to be done every 6 months. Each clients QC/QA has their own standards. Hope this helps,

Eric


Hydro - Where the real pressure is.

 

[macmet]

Just in case anyone else was curious, I contacted the boiler manufacturer and they recommend that pressure gauges are calibrated once a year. He did say that some areas require them to be done every six months.

Then I contacted the gauge manufacturer. They apparently do not make recommendations regarding calibration. They leave that for the customer to determine based on local regulations. However, they did mention that a lot of their end users do calibrate every six months.

 

[zdas04]

When making this decision I always ask "what is the data from this gauge used for, and what are the consequences of a 15% error?" For a feedwater pump discharge gauge there are many important uses, but the consequences of a 10-15% drift are pretty minor (you are typically comparing a reading to last month, not to some objective standard) and I lean towards annually.

David