A
Friends, the query is:
1. What is the basic difference between an Exd/Exe equipment for Zone-2 and Zone-1 for the same gas group?
Is there any constructional difference, i.e. gap between two flanges, thickness of the housing etc. or is it only the extent of testing done?
2. Suppose I have an Exd motor suitable for Zone-2 in a Zone-2 area. Now there is gas leak. Do I need to shut down the motor? My understanding is, if I don't shut down, gas may enter into the casing and there may be explosion inside the casing. Though it is not a safety issue, but the equipment will be damaged. So if I want to save the equipment, it is better to shut down. But normally there will be thousands of transmitters on the field and on confirmed gas in the plant we don't shut down the transmitters.
What are the recommendation from international standards? Has this issue been discussed anywhere?
Appreciate if someone can help.
1. What is the basic difference between an Exd/Exe equipment for Zone-2 and Zone-1 for the same gas group?
Is there any constructional difference, i.e. gap between two flanges, thickness of the housing etc. or is it only the extent of testing done?
2. Suppose I have an Exd motor suitable for Zone-2 in a Zone-2 area. Now there is gas leak. Do I need to shut down the motor? My understanding is, if I don't shut down, gas may enter into the casing and there may be explosion inside the casing. Though it is not a safety issue, but the equipment will be damaged. So if I want to save the equipment, it is better to shut down. But normally there will be thousands of transmitters on the field and on confirmed gas in the plant we don't shut down the transmitters.
What are the recommendation from international standards? Has this issue been discussed anywhere?
Appreciate if someone can help.