What is Solid front?
Solid front is a wall that is located between the Bourdon tube and the dial & Pointer assembly of pressure gauge.
Solid front creates a partition between the pressure element and the window of the pressure gauge.
In the event of failure this acts as a protection barrier.
Solid front creates a partition between the pressure element and the window of the pressure gauge.
In the event of failure this acts as a protection barrier.
When are solid front used?
Usually Solid front s are used for services having very high process pressure.
The use of solid front is mentioned in major international standards like ASME B40 & EN-873-1/2/3
The use of solid front is mentioned in major international standards like ASME B40 & EN-873-1/2/3
Why do we have solid front?
The pressure gauge window might not be sufficient enough to provide adequate protection against buildup of pressure inside the pressure gauge in event of failure of elastic element.
Also, the pressure gauge window itself might sometimes be the the most hazardous component since the operator might be facing the dial to capture pressure of process.
So solid front reduces the possibility of parts being project forward in the event of elastic element failure and thus protect the operator.
Also, the pressure gauge window itself might sometimes be the the most hazardous component since the operator might be facing the dial to capture pressure of process.
So solid front reduces the possibility of parts being project forward in the event of elastic element failure and thus protect the operator.
Are there any exceptions?
Yes, ASME B40.1 states the following exception to this protection technique
An exception to this protect is when there is an explosive failure of the elastic element assembly which the solid front cannot contain, However this seem to be very rare occurrence
An exception to this protect is when there is an explosive failure of the elastic element assembly which the solid front cannot contain, However this seem to be very rare occurrence
References:
1. ASME B40.1
2. EN-873-1
3. EN-873-2
4. EN-873-3
1. ASME B40.1
2. EN-873-1
3. EN-873-2
4. EN-873-3
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