Comments for AN-Ex

Comment on Ex d – a non solution to a hot problem by mtlinst

mtlinst — Fri, 03 Jul 2009 11:09:33 +0000

It comes from the German “Druckfeste”

Comment on Ex d – a non solution to a hot problem by Somasekhar.K

Somasekhar.K — Thu, 02 Jul 2009 11:49:30 +0000

In”Ex-d”,What is d

Comment on Intrinsic safety in hydrogen/oxygen mixtures by Estellito Rangel Jr.

Estellito Rangel Jr. — Fri, 16 Jan 2009 00:19:35 +0000

IEC Maintenance Team MT 60079-10-1 (Area classification with gases) is planning to include in the next edition of the standard, a special text regarding the behavior of hydrogen. It seems that until now, the mathematical model used in the standard is not adequate for hydrogen.

Comment on Thoughts on the design of intrinsically safe junction boxes by FOUZI

FOUZI — Sat, 10 Jan 2009 11:55:12 +0000

well done thank you, we need more

Comment on Intrinsic safety in hydrogen/oxygen mixtures by Richard Newberry

Richard Newberry — Tue, 16 Sep 2008 07:23:03 +0000

Both hydrogen and oxygen can be measured reliably. With two sensors in a single analyser compensation for air can also be achieved.

Comment on Intrinsic safety in hydrogen/oxygen mixtures by Bookmarks about Oxygen

Bookmarks about Oxygen — Sat, 19 Jul 2008 23:15:48 +0000

[...] – bookmarked by 3 members originally found by SOGYOH on July 12, 2008 Intrinsic safety in hydrogen/oxygen mixtures http://mtlinst.wordpress.com/2008/07/09/intrinsic-safety-in-hydrogenoxygen-mixtures/ – bookmarked [...]

Comment on Thoughts on the design of intrinsically safe junction boxes by Paolo Corbo

Paolo Corbo — Wed, 09 Jul 2008 11:45:07 +0000

Very interesting collection of comments and tips quite often forgotten.

Comment on Equipment Protection Levels and all that by Estellito Junior

Estellito Junior — Thu, 24 Apr 2008 23:39:27 +0000

This is a very important safety measure, as we know that OSHA is a legal requirement for USA, beyond a simply technical one.
Regarding the OSHA “permitted installations”: 1) intrinsically safe, 2) approved for the hazardous (classified) location, or 3) safe for the hazardous (classified) location, please, note that it is not allowed to consider “the consequences of an explosion” to install equipment with a “lower safety degree” of those required by American standards.
Comparing with the IEC EPL method, where a “lower EPL than required” is allowed if “the consequences of the explosion” are “small”, we can say that OSHA method is safer.
The EPL method sounds as a “black hole”, where all installation’s “non-conformities” can “disappear” with a snap, simply saying that “the consequence of an explosion is minimal”.
How may deaths can be considered as “minimal consequence” of an explosion?
This “EPL” seems to be against all safe requirements given by IEC Ex standards.

Comment on The future role of the humble paper clip in Hazardous Areas by Estellito Rangel Jr. - Brazil

Estellito Rangel Jr. - Brazil — Sun, 09 Dec 2007 15:10:31 +0000

This is a very important safety measure, as we know that OSHA is a legal requirement for USA, beyond a simply technical one.
Regarding the OSHA “permitted installations”: 1) intrinsically safe, 2) approved for the hazardous (classified) location, or 3) safe for the hazardous (classified) location, please, note that it is not allowed to consider “the consequences of an explosion” to install equipment with a “lower safety degree” of those required by American standards.
Comparing with the IEC EPL method, where a “lower EPL than required” is allowed if “the consequences of the explosion” are “small”, we can say that OSHA method is safer.
The EPL method sounds as a “black hole”, where all installation’s “non-conformities” can “disappear” with a snap, simply saying that “the consequence of an explosion is low”.
How may deaths can be considered as “low consequence” of an explosion?
This “EPL” seems to be against all safe requirements given by IEC Ex standards.

Comment on ATEX instructions- a paper chase by Estellito Rangel Jr.

Estellito Rangel Jr. — Thu, 15 Nov 2007 18:32:48 +0000

The same problems we face in Brazil. Manufacturers tend to prefer internet media, but considering that after purchasing the next step is installation, customers prefer that products came with installation instructions and a copy of the conformity certificate.
The best way to provide these instructions I think that is the old but good paper, with detailled drawings. It is not feasible a installation worker stopping its job to access an internet terminal, and then coming back to his task, and repeat this cycle again and again for each equipment to be installed.
So, a suggestion is: installation instructions in paper within the equipment box (one sheet per box seems enough); maintenance instructions can be available on the internet.