Hazardous & Explosion Proof Access Control Tutorial

By Brian Rhodes, Published Feb 27, 2020, 10:25am EST

Controlling access to hazardous environments requires equipment meeting specific ratings that certify they will not start fires or will not introduce potential contamination risks.

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************* ***** ******* ******* careful *********. ****** **** note, ** *******:

  • ***** ** *********-***** ****** equipment ********?
  • **** *** *** ***** considerations *** ********* ***** access *******?
  • ********* ***** ****** ********* including ****, ***, **********, and ******.
  • ******* ******* ****
  • **** *** *** *******? Including **** **, **, Division *, ******** *, and **** ********** **/***
  • **** ** *** ******* mean?

Explosion ***** ************

*** * ********* ***** detailing *********-***** ****** *******, and *** ******** ************ of **** ********* *** our********* & ********* ***** Video ****************.

Where ** ********* ***** ****** ********* ********?

** *******, *** ******** where ******** ** *****, vapors, ** *** ********* material ** **** ** processed *** **** ***** a '********* ****' ***********. In *******, **** ********* is *** *******, ** locations **** **** ********* risk ** ***** ******** exposures *** **** ****** and ********** ***********.

******** ** ****** ********* area ********* *** *********-***** chemical ******* *****, **** gasoline **** *****, ******** processing, *** ******** *****, or *** ********* ***** airborne **** *** ** ignited ****** ** ************* plants ** ************ ******* granaries.

********** ******* ******** *** not ********* ********** ** 'hazardous *****' ********* ******* equipment, *******, **** ****** be ***** ** ******* or *********** ** * location ******** ***** ****** control *********.

Three ***** **************

****** ********** ********, ****** video ************ *******, ********* require ******** ********** *** installed ******** ****** ********* areas. *********, *** ********* area ****** ***** ** be ********* ********* ***** basic *****:

  1. *** ******* ******* ** the ********* ****, **** readers *** *****, **** to **** *********-***** ******* of *** ****.
  2. *** **** ** ***** cabling *** ***** ******* need ** ** **** intrinsically **** **** ** enters *** ****.
  3. ****** *********** ** ******* like ******* *** ***** should *** ** ******* of ******* * ****.

***** ************ ********* *** be ************ ** ***** rated ********* **** *** approval ** ** ***. Options *** ******* ******** ratings *** ** ******* found, ** ** ****** in *** **** *******.

What ********* ********* **** ***********?

** *******, ****** ******* inside ********* ***** ******* as **** ****** ******* as ******** ******* ** the ***** ****. ***********, components **** ****** ***********, panels, ***-******* ***** ********, and ******* ******** *** installed ** **** ***** and ******* ** ******* ratings.

*******, *** *** ******* can ** ***** *** must ** **** *********** adjacent ** **** ******** within * ********* ****. The **** ******* ********** needing ** ** ********* are ******** *****:

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******* ********** ******* *** keypads *** ********* **** immediately ** *** *******, it ** ****** **** these ******* **** ***** a ******.

* ****** ** ******* exist **** ****** ** specific ****** *** ********** format ******* *** ******* examples **** ***** ************* including:

Door ******** ******** *** *** *******
******* ****** ********* **** onto ***** ** ********* areas ********* ** *********** ******* ******** ******** *** contacts.
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***** ******** *******:

*****

*************, ******** *** *** most ****** **** ** hazardous ***** **** *********, despite ***** ***** ** locks ************ ************ ********* *** *********** openings. ******** *** **** because ***** ********* ******, solid-state, *** ******** ************ is ****** *** **** costly ** *********** ** explosion-proof ******** ** *** basic ********* ****/******** ****** operation ** ******* *** exit *******.

*******, ******* ***** ******** from ************* ***************** *********.

Integral **** *****

** **** *****, *** explosion ***** **** ** gate ****** **** ** designed **** * ********** security ****, *** *** access ****** **** ********* to ** *** ********** or ***** ********. *******, other ******** ** *** door *** ** *********** for ******* * **** closed, ** **** ****, as ** *** **** of ********* ********* ************** *********. ***** ******* *** application *** ******* ****** and *** **** $*,*** or ****.

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********/********

** **** *****, ********** forms ** *********** ****** are ******** ******** ** opening ****** *** ********* areas. ******** **** **************** ********* ******** ********** ******** to ***** **** ******** controlled *** ******** ********* into *** ***** ****.

** ** **** ** our************, ***** ******** ********* involve ***** * ****** of ***** *** ******** rooms ** ********* ********* areas **** ******* *********** of ******.

Explosion ***** **********

** **** *****, ***-***** equipment **** ** ********* in ********* *****, *** elements **** ******* ** power **** **** ** run **** * ***** area.

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*** ****, * ******* of *******-******* **********, ******** boxes, *** **** **** compound ** *********. *******, the ****** *** ****** of ********** ****** **** these ******* ***** *** subject **************:

****** *** ***** ******* items *** ***** **** a *** ******* ** thousands ** **** ******* depending ** *********, ******, and ******* ** *** being ****** **** ***** gas ** **** ** required.

Explosion ***** ** ***** *********

*** ********, *** ********* rating ******* *** ***** cited ** '******* **********' and *** **** ****** together ** *** **** door. *******, ***** ******* indicate *** ******** **********:

  • ********* *****: ***** *** related ********* **** *** introduce ** ******* ********* ignition ** * ********* environment
  • ***** *********: ***** *** sustain ** ********* ** pressure **** *** ***** retain ***** ********** **********

** ** ********* ** not ******* ***** ************ and ****** ****** ********* proper *******.

How ** * **** **** ** ******** ******* ***** *********?

** *** *** ** integrator, ******** *******, ** manager ** ************, *** should *** ** ******** whether ** *** ******* rated ********* ** ********.

*********, ***'***', ** '********* ****** jurisdiction' ***** **** *************. The *** ***** ** a **** *******, ** operational **** ********** ********, occupational ****** *********, ** even ** ********* ***********. That ********** **** ******** the ********* **** ***** on **** ********. ** is *** **** ******** of *** *****/******** ** such ** *********** ** realize, *******, *** ******** any ********* ***** ** the ********* **** – including *** ************ ** electronics ********* **** ************ cameras. ********** *** ********* asked ** ******* *********** certification ** *** ********* equipment.

** *******, * *** indication **** ********* ****** gear ** ******** ***** from ********* ************ ********** equipment ** ******* ********* in *** ****. *** example, ** *** **** workers **** ** **** electrical ******** ******** ** if **** **** ****** have ** ** ******, the **** ****** ******** explosion-proof ****** *********. *******, it ** ********* ** base ********* ************** **** solid ************ ** *** area, ** *** **** of ********* ********* ** ‘safe *** ***’, ** ‘intrinsically ****’, ** ************* more ********* **** ***-********* equipment.

What **** * ********** '****** ******' ****?

*********, * ******* ** hazardous **** ************* ***** exist, *** ** ** appropriate ** ******* ********* that ********* ********* ********** standard ******* ** **** application.

****** ******

** *** **,*** ****** ******* "******** Electrical ****** '**** **', ******* environments ** ********* **********. The ************** ** ********* in ***** (*) *******, with * ***** * environment ***** *** **** volatile ********* ********* ***** that ****** ******** *** chemicals. ** ************ ********* (the ********) ******* *** default ****** ‘**** ** condition’, ***** ******** * ******, ** ******** 2 – ********.

** **** ******, *** risk ** **** ** explosion ** * ********* location *** ** *********. For *******, ******** ** a **** ******** ******** may ** ********** ** a ‘******/*********’ ****, ***** a **** **** ******* facility *** ** ********** as * ‘******/*********’ ********. Both *************** ****** **** risk, *** *********, *** risk ** ********* ** being **** *********** ** the **** **** *** lower ******.

********

** *** **, * rough ********** *** *** NEC’s *****/******** ****** ** noted ** *** ‘**** directives, **/***’. ***** ********* definitions ** ********* ***** differ (*** *** *** overlap) ***** *********, *** ATEX ********* ***** ** quantify ********* ***** ** the **** ******.

** ***** *******, ********** Brazil, *** ******* **** classification ****** ******** *** same ******** ** *** bodies ****** *****.

***** *********** ** **** other, ***** ******* *** seek ** ********** ****** hazardous *****.

Comments (3)

* ***** ******* **** products **** ****: ****-********.***/**/********/**********/***:*********-*******-****-***** and *******:***.*******.**********

***** ******* *** ** scope, *** ***** **** be ********** ** *** an ********** ** **** systems.

**********: * **** ****** with/recommended **** ********* ******** before *** * *** no ************ **** ******.

*'** **** **** **** readers ** *** **** and ***** **** ******** so ***** **** *** there.

********* *** ****** ****** really ***** ** ** installing **** * **** area. ** ***'** ***** a *** ***** **'* pretty ****** ** ******* as *** **** ***'* harzadous ***** ** ******* operational, ********** **** ** area ****'* ******* *********** is * ***** ***** story *** * ********* world ** ****. *'** had * *** **** readers *** **** ******* and ******* **** ** they ***** **** ********* to ****** ************ (** drilling ** *** **** allowed) **** ** *********** class * **** (****** used ***** *** ********* oil ******** ********** *** the ****** **** *** bolts *****). ** *** an *********** ******* ** you **** ** **** every **** ****** ****** for ** ** **** out.

*'** *** * *** wire ******* *** **** devices *** ******* **** so **** ***** **** structure ** ****** ************ (no ******** ** *** kind *******) **** ** operational ***** * **** (client **** ***** *** specalist *** ******** ********** for *** ****** **** and ***** *****).

****'* ***********. *** ***** was *** '*********' ****** of ****** *** *******? Or *** *** ******** eventually *** ***** *********** to ***** **** **** securely?

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