Standard for Fire Hydrants

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Standards Development Organisation:
ULC Standards
Contact Information:
ULC Standards Normes ULC
Working Program:
View the ULC work program
Designation Number:
CAN/ULC-S520
Standard Type:
National Standard of Canada - Domestic
Standard Development Activity:
Amendment Revision
ICS code(s):
13.220.10
Status:
Proceeding to development
SDO Comment Period Start Date:
SDO Comment Period End Date:
Posted On:

Scope:

SCOPE

1.1 This Standard covers dry barrel type hydrants intended for use in piping systems supplying water for fire protection service.

1.2 Hydrants shall be designed for a minimum working pressure of 1000 kPa.

1.3 Hydrants of special design, including those having built in hose gates are not covered by this Standard.

1.4 Hydrants with replaceable sections or components that are specially designed with lower breaking points than the rest of the unit are not explicitly covered in this Standard. Except for the specially designed breakable sections or components, however, such hydrants shall conform to all other requirements of this Standard.

1.5 This Standard does not cover wet barrel type hydrants. Wet barrel type hydrants are excluded from coverage by this standard due to the freezing concerns.

1.6 References to the setting and drainage of hydrants are not included in this Standard.

Project need:

This proposal aligns the minimum barrel thickness requirements with AWWA C502, Dry-Barrel Fire Hydrants and AWWA C503, Wet-Barrel Fire Hydrants. The thickness requirements in the AWWA standards have been in place for several years and there are no known issues with hydrants utilizing these specifications. In addition, hydrants are required to undergo performance testing including leakage and hydrostatic testing as part of the evaluation. This confirms the barrel design can meet minimum performance requirements in addition to the construction requirements. This proposal is being submitted to both UL 246, Fire Hydrants for Fire Protection Service and ULC S520 Standard for Fire Hydrants. All de facto hydrant installation codes (NFPA) and related standards use U.S. Customary units in their requirements and designs. The use of Imperial/U.S. Customary units as the primary unit of measurement in this National Standard of Canada will maintain consistency and support 'one standard and one test' across North America.

Note: The information provided above was obtained by the Standards Council of Canada (SCC) and is provided as part of a centralized, transparent notification system for new standards development. The system allows SCC-accredited Standards Development Organizations (SDOs), and members of the public, to be informed of new work in Canadian standards development, and allows SCC-accredited SDOs to identify and resolve potential duplication of standards and effort.

Individual SDOs are responsible for the content and accuracy of the information presented here. The text is presented in the language in which it was provided to SCC.