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Thread: Semantics of "Area Classification" and who should determined Areas

  1. #41

    HAZLOC

    Quote Originally Posted by rbalex View Post
    I have served on three national level "HazLoc" Technical Committees. Almost without exception, the membership was all "electrical", the lone exception was the API Subcommittee on Electrical Equipment (API RP 500 and 505) where a few members were "mechanical" representing some motor interests.

    I have said before, "Hazardous location classification is not rocket science".It is definitely a collaborative activity, but all that is actually needed is the process flow diagrams, flow stream material balances and an accurate plot plan. You often don't even need that much for installations within the scopes of Articles 511 to 516.
    rbalex, "Curious..." infancy by OP was the beginning of this thread. I want to ask a question rather than adhere to a statement originally posted without proper syntactically corrected text, that is a question not a statement in the beginning OP addition to this Hazardous Portion.

    In relation to "...(API RP 500 and 505)..." and MAOP of equipment essentially utility gas compression, new and/or rebuilt by qualified OEM technicians, how does the API view acceptance of their published diagram's when over pressurization boundaries both process and venting of maximum allowable operating target limits and the final rule placed in federal register entry for a change when reviewed on 1 year cycles "Incoroporation By Reference" as compared compared to 3 year cycles by industry committees ? Or better still how does your committee ascertain your published approved wording and reference diagrams? (other than marking syntax by (new, revised, of deleted) marking as explained in the beginning of the publication?)

    Thank You So Much. I think that was 3 questions, please accept any grammatical challenges.
    Last edited by nec_addicted; 05-09-18 at 01:33 PM.

  2. #42
    Join Date
    May 2010
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    Washington
    Posts
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    There is a 2014 IEEE PCIC paper "Electrical Hazardous Area Classification Design as a Basis for Safer Operations" that discusses the increased role that the hazardous area classification drawings can play beyond just for electrical installations. I would say that this paper is more of an acknowledgment to how some in the industry are already using their hazardous area classification documents as opposed to it being a brand new idea.

    In that regard, the methodology and standards may still belong to the "Electrical" folks but if the API and the industry come to formally identify these documents as the basis for their siting and safe work, we will likely start seeing other disciplines getting engaged.

  3. #43
    Quote Originally Posted by nec_addicted View Post
    rbalex, "Curious..." infancy by OP was the beginning of this thread. I want to ask a question rather than adhere to a statement originally posted without proper syntactically corrected text, that is a question not a statement in the beginning OP addition to this Hazardous Portion.

    In relation to "...(API RP 500 and 505)..." and MAOP of equipment essentially utility gas compression, new and/or rebuilt by qualified OEM technicians, how does the API view acceptance of their published diagram's when over pressurization boundaries both process and venting of maximum allowable operating target limits and the final rule placed in federal register entry for a change when reviewed on 1 year cycles "Incoroporation By Reference" as compared compared to 3 year cycles by industry committees ? Or better still how does your committee ascertain your published approved wording and reference diagrams? (other than marking syntax by (new, revised, of deleted) marking as explained in the beginning of the publication?)

    Thank You So Much. I think that was 3 questions, please accept any grammatical challenges.
    The question of MAOP quoted above from a CFR standpoint pasted in from resources below, is an example in timeline I was hoping to obtain, from a knowledgeable source related to NFPA committee eccentric past relevance to understand how reference exhibits appear in each update to NFPA 70.
    Determining Class Location
    Building Count, Clustering,
    Boundaries
    MAOP review
    • "In addition, 49 CFR 192.619(a)(3) allows an operator
    to establish an MAOP based upon the 5‐year window
    for older systems prior to July 1, 1970. Once that has
    been established and documented and a class
    location study is performed resulting in a class
    location change from what it was on July 1, 1970,
    does the operator have to incorporate a class
    location factor for revision of the MAOP established
    by the 5‐year window? Our contention is that the
    operator does not."

    MAOP review
    • If a class location study identifies a pipeline segment
    with a hoop stress corresponding to an established
    MAOP that is not commensurate with the present
    class location, the operator must confirm or revise
    the MAOP of the pipeline segment using one of the
    three methods in § 192.611(a). Operators must use
    all the applicable class location factors wherever called for in each of these methods.

    Here is where an Architect would use building codes to establish safe areas for blowout panels when over pressurization was a subject of an upgrade. However this one answer hinges on a 5 year cycle.

    It turns out my understanding is NFPA has a remedy to view any of their proposed section in the form of public industry may "view only" interested parties request for exact code and article or in my case exhibits that are changes to hazardous area classification boundaries. The release of Tentative Interim Agreements (TIA's) library during the approval cycle location is still unclear to this caller.

    That much information obtained today in a chat log with NFPA. When the caller asked about NFPA 70 of course the 3 year revision recently out had zero proposals from industry at this time.

    That is sort of the long and short of my curious question's?

    Optionally my centrist API 500 and API 505 is a different or another field of research.

    Occasionally hard to satisfy NFPA because of standard business operation rules and / or a standard statement at their site sets the threshold higher than I can hope to obtain when using a research technique I would hope to crack. Primarily to obtain a document that may be available by filling out a form needs to include two active members on the committee signatory approval before the form is reviewed for context. At least that is a method and considerably a lot longer process.

  4. #44

    Hazardous Classifications 49 CFR 192.619

    Continuation of above. If one was to google above CFR one would get listings from Federal Transportation Board and Cornell University Law.

    There you would be able to surmise the transportation aspects of federal regulations for delivery of gas via pipeline and also find links to the federal register proposed Interim Agreements for looking over and / or commenting on industry documents under MAOP jurisdictions.

    It appears only to this simple transparent minded process other integral aspects to governing public safety that other organizations would adopt methods easier to understand.

    More is required for actually operating a pipeline and MAOP rule making based on transportation of hazardous gas also requires more than a few material balance flow sheets.This is where FERC process takes over plot plans and clustering of buildings and/or classification of boundaries from public buildings separation.

    So in essence it is a "..collaborative..."( as previously) by others mentioned in decision process for both changes and "...who should be recognized..." as the reviewer of Electrical Hazardous Location documents and drawings.
    Last edited by nec_addicted; 05-12-18 at 01:58 PM.

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