In a previous life in the UK I was involved in this sort of thing associated with oil rigs. As I remember the hazards were broken down into 3 groups 1) Equipment continually in contact with the explosive gas 2) Equipment that would come into contact if there was a leak 3) Equipment that was some distance from the gas and might see some gas in the event of an accident.
In the UK the regulations left it up to the engineer to determine which group his equipment was being located in and what sort of protection to use, ie if you were in #1 above everything went into an explosion proof box with special glands and seals. Whereas if you were #3 an IP66 box would do with reasonable seal glands. However the sting in the tail was that if you got it wrong and there was a BIG BANG you were in line for criminal proceedings as well as large liability claims and oil rigs don't come cheap. Just an English tuppence worth Brian Harlowe * opinions expressed here are personal and in no way reflect the position of VG Scientific --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to [email protected] with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to [email protected], [email protected], [email protected], or [email protected] (the list administrators).
