توضیحات :
NFPA 2 – Hydrogen Technologies Code
۲۰۲۰ Edition
This edition of NFPA 2, Hydrogen Technologies Code, was prepared by the Technical Committee on Hydrogen Technology. It was issued by the Standards Council on June 1 0, 201 9, with an effective date of June 30, 201 9, and supersedes all previous editions.
This edition of NFPA 2 was approved as an American National Standard on June 30, 2019.
Origin and Development of NFPA 2
With the increased interest in hydrogen being used as a fuel source, the National Fire Protection Association was petitioned to develop an all-encompassing document that establishes the necessary requirements for hydrogen technologies. In 2006, the Technical Committee on Hydrogen Technology was formed and tasked to develop a document that addresses all aspects of hydrogen storage, use, and handling; that draws from existing NFPA codes and standards; and that identif es and f lls technical gaps for a complete functional set of requirements for code users and enforcers. This document is also structured so that it works seamlessly with building and fire codes.
This code is largely extracted from other NFPA codes and standards (e.g., NFPA 52, NFPA 55, and NFPA 853) and is organized in a fashion that is specif c for hydrogen. Paragraphs that have been extracted from other documents are shown with the extract reference brackets at the end of the paragraph. In some cases, modif cations have been made to the extracted text to use terminology appropriate for this code, such as the terms GH2 instead of compressed gas and LH2 instead of cryogenic fuid. In those instances, brackets encase the modifying words. Similarly, where language was deleted to adhere to requirements based exclusively on hydrogen and no other changes were made to the paragraph, brackets that encompass a hyphen [-] are inserted into the paragraph to denote a change to the original material while retaining the extract to the source document. In short, added or modif ed text is shown with brackets around the differing language and pure deletions of text are shown with [-] .
The 201 6 edition of NFPA 2 was more closely aligned with the requirements in NFPA 55 for gaseous and liquef ed hydrogen systems. Both documents were in the same revision cycle, which allowed the technical committees to work more closely together on revisions to the joint content. The requirements for hydrogen generation systems in NFPA 2 (Chapter 1 3) were no longer extracted from NFPA 55, and the requirements for hydrogen fueling systems (Chapters 10 and 11 ) were no longer extracted from NFPA 52. The Technical Committee on Hydrogen Technology had primary responsibility for those requirements.
The 201 6 edition had the following changes:
(۱ ) Signif cant revisions to Chapter 1 0, Gaseous Vehicle Fueling Facilities, that ref ected signif cant efforts by the technical committee in improving this chapter
(۲) Clarif cation and organization of the requirements for gaseous hydrogen systems into three tiers based on the quantity of hydrogen stored: less than or equal to the maximum allowable quantity (MAQ) , greater than the MAQ but less than the bulk quantity, and bulk systems
(۳) Changes to the requirements in Chapter 7 for emergency isolation consistent with the changes made to NFPA 55
(۴) New requirements for hydrogen equipment enclosures to address the growing use of these systems in a variety off eld applications
(۵) New chapters for parking garages and repair garages for hydrogen fuel cell vehicles
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