NFPA 55: Compressed Gases and Cryogenic Fluids Code
Current Edition: 2013 Next Edition: 2016

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NFPA 55:
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What is NFPA 55?
NFPA 55: Document Scope
1.1 Scope. 1.1.1 Applicability. This code shall apply to the installation, storage, use, and handling of compressed gases and cryogenic fluids in portable and stationary containers, cylinders, equipment, and tanks in all occupancies. 1.1.2 Specific Applications. This code shall not apply to the following: (1)*Off-site transportation of materials covered by this code. (2) Storage, use, and handling of radioactive gases in accordance with NFPA 801, Standard for Fire Protection for Facilities Handling Radioactive Materials. (3)*Use and handling of medical compressed gases at health care facilities in accordance with NFPA 99, Standard for Health Care Facilities. (4) Systems consisting of cylinders of oxygen and cylinders of fuel gas used for welding and cutting in accordance with NFPA 51, Standard for the Design and Installation of Oxygen–Fuel Gas Systems forWelding, Cutting, and Allied Processes. (5) Acetylene cylinders in acetylene cylinder charging plants in accordance with NFPA 51A, Standard for Acetylene Cylinder Charging Plants. (6)*Flammable gases used as a vehicle fuel when stored on a vehicle. (7)*Storage, use, and handling of liquefied and nonliquefied compressed gases in laboratory work areas in accordance with NFPA 45, Standard on Fire Protection for Laboratories Using Chemicals. (8) Storage, use, and handling of liquefied petroleum gases in accordance with NFPA 58, Liquefied Petroleum Gas Code. (9) Storage, use, and handling of gases within closed-cycle refrigeration systems complying with the mechanical code. (10) Liquefied natural gas (LNG) storage at utility plants under NFPA 59A, Standard for the Production, Storage, and Handling of Liquefied Natural Gas (LNG). (11) Compressed natural gas (CNG), liquefied natural gas (LNG), compressed hydrogen gas (GH2), or liquefied hydrogen gas (LH2) handled as a vehicle fuel in accordance with NFPA 52, Vehicular Gaseous Fuel Systems Code. Where a bulk hydrogen system is intended for vehicular fueling applications, the applicable provisions of NFPA 52 required for fuel dispensing operations shall be required in addition to the requirements of this code. (12) Nonflammable mixtures of ethylene oxide with other chemicals. (13) Ethylene oxide in chambers 10 ft3 (0.283 m3) or less in volume or for containers holding 7.05 oz (200 g) of ethylene oxide or less.
NFPA 55 facilitates protection from physiological, over-pressurization, explosive, and flammability hazards associated with compressed gases and cryogenic fluids. Official document scope
What does NFPA 55 address?
Criteria provide fundamental safeguards for the installation, storage, use, and handling of compressed gases and cryogenic fluids in portable and stationary cylinders, containers, and tanks in all occupancy types.Table Of Contents.
NFPA 55, 2013 Edition: Archived Revision Information
Report on Proposals (ROP)
Report on Proposals (ROP)
Proposals can be submitted for text to be amended or included in NFPA Codes and Standards. Following the Call for Proposals period, the responsible Technical Committee or Panel holds a meeting to consider and act on all submitted proposals. The committee or panel may also develop its own proposals. A document known as the Report on Proposals (ROP) is prepared containing all the Public Proposals, Technical Committees' action on each Proposal, as well as all Committee-generated proposals. The ROP for the document in question is submitted for the approval of the responsible TC or Panel by a formal written ballot. If the ROP does not receive approval via written ballot in accordance with NFPA rules, the Report is returned to the committee for further consideration and is not published. If the necessary approval is received, the ROP is published in a compilation of Reports on Proposals issued by NFPA twice yearly for public review and comment, and the process continues to the next step. The ROP is published and widely distributed and anyone may download or request a copy.
ROP Meeting Agenda
ROP Meeting Minutes
ROP Ballot
ROP Ballot
The ballots posted on this page are for public information only. Voting on ballots is permitted by committee members only. See NFPA Regulations Governing Committee Projects, Section 3.3.4.
Ballot (PDF, 5 MB)
Ballot Circulation (PDF, 49 KB)
Ballot Final (PDF, 61 KB)
Report on Comments (ROC)
Report on Comments (ROC)
Once the ROP becomes available, there is a 60-day comment period during which time anyone may submit a public comment on the proposed changes documented in the ROP. The committee or panel reconvenes at the end of the comment period and acts on all public comments. This committee or panel may also develop its own comments. As before, approval obtained via written ballot in accordance with NFPA's Regulations is required on all committee and panel actions. All of this information is compiled into a second Report, called the Report on Comments (ROC), which like the ROP, is published and made available for public review for a seven-week period.
Report on Comments (ROC) (PDF, 1022 KB)
ROC Meeting Notice
ROC Meeting Notice
Note: Please contact the appropriate staff liaison (listed on the Technical Committee tab) for information on attending an NFPA Technical Committee meeting as a guest. Read NFPA"s Regulations Governing Committee Projects (Section 3.3.3.3) for further information.
ROC Meeting Agenda
ROC Meeting Minutes
ROC Ballot
ROC Ballot
The ballots posted on this page are for public information only. Voting on ballots is permitted by committee members only. See NFPA Regulations Governing Committee Projects, Section 3.3.4.
Ballot (PDF, 880 KB)
Ballot Form (PDF, 186 KB)
Ballot Circulation (PDF, 70 KB)
Ballot Final (PDF, 73 KB)
Motions Committee Report (NITMAM)
Motions Committee Report (NITMAM)
Proposed NFPA documents will be presented for action at the applicable Annual (June) Association Technical Meeting only when proper Amending Motions (Notice of Intent to Make a Motion - NITMAM) have been certified by the Motions Committee of the Standards Council as a proper amending motion. Documents that receive no motions will not be presented at the meeting and instead will be forwarded directly to the NFPA Standards Council for action on issuance. More about the codes and standards making process including NITMAM.
No NITMAMs
TIA Ballot
Ballot, TIA Log No. 1071 (PDF, 533 KB)
Association Technical Meeting
Consent document not presented at Association Technical Meeting. Document issuance by Standards Council: May 29, 2012
Archived revision information
NFPA 55, 2013 Edition: Archived Revision Information
View archived proposals, comments and other records related to the development of this edition.
Read the archived revision information
Tentative Interim Amendment (TIA)
Tentative Interim Amendment (TIA)
Tentative Interim Amendments (TIAs) are amendments to an NFPA document processed in accordance with Section 5 of the Regulations Governing Committee Projects. They have not gone through the entire codes and standards-making process of being published in a ROP and ROC for review and comment. TIAs are effective only between editions of the Document. A TIA automatically becomes a proposal of the proponent for the next edition of the Document, as such is then subject to all of the procedures of the codes and standards making process. TIAs are published in NFPA News , NFCSS, and any further distribution of the document after being issued by the Standards Council.

Requests for TIAs shall be clearly worded to provide the recommended revision and the reason as to why it is of an emergency nature requiring prompt action. Submissions shall be in writing, addressed to the Standards Council Secretary, NFPA, 1 Batterymarch Park, Quincy, MA 02169-7471. The submitter must also provide the appropriate endorsments in writing of two members of the applicable technical committee or technical correlating committee. For further information on submitting a TIA, please contact Codes and Standards Administration.

TIA 13-1 (issued 10/30/2012) (PDF, 21 KB)
TIA 13-2 (issued 10/30/2012) (PDF, 32 KB)
Errata
Errata
Errata are corrections issued to an NFPA document, published in NFPA News, the National Fire Codes Subscription Service (NFCSS), and included in any further distribution of the document.

For previously issued Erratas (not listed below), e-mail the NFPA Library, call +1 617 984-7445, or fax +1 617 984-7060.

Errata 55-13-1 (issued 1/18/2013) (PDF, 18 KB)
Formal Interpretations (FIs)
Formal Interpretations (FIs)
Formal Interpretations (FIs) provide formal explanations of the meaning or intent of any specific provision or provisions of any document in accordance with Section 6 of the Regulations Governing Committee Projects.

Download a Formal Interpretation request form (doc, 58 KB).

For previously issued Formal Interpretations (not listed below), e-mail the NFPA Library, or call +1 617 984-7445, or fax +1 617 984-7060.

Formal Interpretations (PDF, 24 KB)
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