ULC CAN/ULC 677-14 (R2024) Standard for Fire Tested Aboveground Tank Assemblies for Flammable and Combustible Liquids

PREFACE

This is the First Edition of the Standard for Fire Tested Aboveground Tank Assemblies for Flammable and Combustible Liquids, CAN/ULC 677.

This Edition of the Standard was formally approved by the ULC Standards Committee on Stationary Steel Storage Containers for Flammable and Combustible Liquids.

This Standard has been developed in compliance with the requirements of Standards Council of Canada (SCC) for accreditation of a Standards Development Organization.

Only metric SI units of measurement are used in this Standard. If a value for measurement is followed by a value in other units in parentheses, the second value may be approximate. The first stated value is the requirement.

Appendix A, identified as Informative, iis for information purposes only.

In Canada, there are two official languages, English and French. All safety warnings must be in French and English. Attention is drawn to the possibility that some Canadian authorities may require additional markings and/or installation instructions to be in both official languages.

This First Edition National Standard of Canada is based on, and now supersedes, the First Edition, ULC/ORD-C142.5, Concrete Encased Steel Aboveground Tank Assemblies for Flammable and Combustible Liquids.

Attention is drawn to the possibility that some of the elements of this Canadian standard may be the subject of patent rights. ULC Standards shall not be held responsible for identifying any or all such patent rights.

Requests for interpretation of this Standard should be sent to ULC Standards. The requests should be worded in such a manner as to permit a “yes” or “no” answer based on the literal text of the requirement concerned.

This CAN/ULC 677 Standard is under continuous maintenance, whereby each revision is approved in compliance with the requirements of SCC for accreditation of a Standards Development Organization. In the event that no revisions are issued for a period of four years from the date of publication, action to revise, reaffirm, or withdraw the standard shall be initiated.

Comments or proposals for revisions on any part of the Standard may be submitted at any time. Proposals should be submitted via a Proposal Request in the iCollaborative Standards Development System (CSDS) at https://csds.ul.comi.

This Standard is intended to be used for conformity assessment.

 SCOPE

1.1 This Standard covers minimum requirements for shop fabricated, aboveground fire tested tank

assemblies intended for storage of flammable and combustible liquids that have a specific gravity not greater than 1.0 and that are compatible with the material of the tank.

In addition to this Standard’s traditional safety requirements for aboveground steel tanks that primarily evaluate structural integrity and mitigate environmental hazards from loss of liquid containment under expected normal conditions; optional construction and/or performance requirements, and associated ratings intended to address more severe conditions associated with the effects of Climate Change are included in Appendix A.

1.2 Tank assemblies constructed to meet this standard are intended to withstand exposure to a 1 h hydrocarbon pool fire.

1.3 These tank assemblies are intended for stationary installation and use in accordance with the following:

A National Fire Code of Canada, Part 4;

B CSA B139, Installation Code for Oil Burning Equipment;

C PN1326, Environmental Code of Practice for Aboveground and Underground Storage Tank Systems Containing Petroleum and Allied Petroleum Products;

D The Requirements of the Authority Having Jurisdiction.

1.4 Tank assemblies covered by these requirements are fabricated, inspected, and tested for leakage before shipment from the factory as completely assembled units.

1.5 These requirements do not address methods of anchoring which may be required to prevent uplift from flooding or movement due to wind or seismic forces.

1.6 These requirements do not address either the construction, or attachment means of ladders, stairs, runways, guardrails, platforms, or equipment supports.

1.7 The Standards for the primary tank to be incorporated into these fire tested tank assemblies are identified in Subsection 4.2, The Primary Tank. As a result of revisions to those Standards published in 2019, in addition to traditional safety requirements for tanks that primarily evaluate functional operation, structural integrity, and mitigate fire & environmental hazards from loss of liquid containment under expected normal conditions; optional construction and/or performance requirements, and associated ratings, intended to address more severe conditions associated with the effects of Climate Change are included in Appendix A.

1.8 Except for optional Climate Change Adaptation requirements in Appendix A, these requirements do not cover special evaluations for resistance to, or use after, earthquakes, floods, high wind events, or other natural disasters; or resistance to vehicle impact.

NOTE 1: See the Note at the beginning of Appendix A for further information on the terms “Adaptation” and “Mitigation”, as they pertain to Climate Change