Standard for Thermoplastic Sprinkler Pipe and Fittings for Fire Protection Service

Underwriters Laboratories Inc. (UL)
Standards Development Organisation:
Underwriters Laboratories Inc.
Working Program:
View the UL work program
Designation Number:
ANSI/CAN/UL 1821:2019
Standard Type:
National Standard of Canada - Domestic
Standard Sub-Type
Joint Canada-U.S. National Standard
Standard Development Activity:
Amendment Revision
ICS code(s):
13.220.20
Status:
Proceeding to development
SDO Comment Period Start Date:
SDO Comment Period End Date:
Posted On:

Scope:

These requirements cover thermoplastic pipe and fittings for use in wet pipe sprinkler systems for fire protection service. Thermoplastic pipe and fittings covered by these requirements are intended for use in sprinkler systems in any of the following types of occupancies: Light hazard occupancies as defined in the Standard for Installation of Sprinkler Systems, NFPA 13; residential occupancies as defined in the Standard for Installation of Sprinkler Systems in One- and Two-Family Dwellings and Manufactured Homes, NFPA 13D; and residential occupancies as defined in the Standard for Installation of Sprinkler Systems in Low-Rise Residential Occupancies, NFPA 13R. The pipe and fittings covered by these requirements are intended to be installed in accordance with the Standard for Sprinkler Systems in One- and Two-Family Dwellings and Manufactured Homes, NFPA 13D; the Standard for Sprinkler Systems in Low-Rise Residential Occupancies, NFPA 13R; or the Standard for Installation of Sprinkler Systems, NFPA 13. The requirements covered by this standard do not address compatibility of plastic pipe and fittings with materials or products that they may be in contact with in storage, handling, or use.

Project need:

It is unclear how many pipes or fittings or joints are contained within an assembly. ‘Assemblies’ implies more than one independently built test configuration. A test assembly/configuration needs to be defined. The usage of the wording “pipe and fitting assemblies” is repeated through multiple sections (20, 21, 24, 25, 26) following section 12. It is unclear the number of assemblies to be tested for each test. Plural language in Section 12 intended for compliance of a product design to this standard can be strenuous for testing in other sections such as Section 20 – Vibration Test. These sections also define specific assembly configurations specific to the test. The samples post cycling are not given time to equilibrate before further evaluation. Wording already used in Sections 29.3 and 29.4 has been selected for consistency.

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