UL 852:2018-08-23 Metallic Sprinkler Pipe for Fire Protection Service.
1.1 These requirements cover metallic pipe intended for use in water based fire protection systems for water distribution or valve trim applications. These pipes may be used in fire protection systems when installed in accordance with the following Standards:
a) Standard for Installation of Sprinkler Systems, NFPA 13;
b) Standard for Installation of Sprinkler Systems in Residential Occupancies up to Four Stories in Height, NFPA 13R;
C) Standard for Installation of Sprinkler Systems in One- and Two- Family Dwellings and Manufactured Homes, NFPA 13D;
d) Standard for Installation of Standpipe, Private Hydrants, and Hose Systems, NFPA 14;
e) Standard for Water Spray Fixed Systems, NFPA 15;
f) Standard for Installation of Foam-Water Spray Systems, NFPA 16; and
g) Standard on Water Mist Fire Protection Systems, NFPA 750.
1.2 Pipe is categorized by size, pressure rating, end configuration, (threaded or unthreaded) and wall
thickness designation. Steel pipe is also categorized by the Corrosion Resistance Ratio (CRR).
2 Components
2.1 Except as indicated in 2.2, a component of a product covered by this standard shall comply with the
requirements for that component.
2.2 A component is not required to comply with a specific requirement that:
a) Involves a feature or characteristic not required in the application of the component in the product covered by this standard, or
b) Is superseded by a requirement in this standard.
2.3 A component shall be used in accordance with its rating established for the intended conditions of use.
2.4 Specific components are incomplete in construction features or restricted in performance capabilities. Such components are intended for use only under limited conditions, such as certain temperatures not exceeding specified limits, and shall be used only under those specific conditions.
3 Units of Measurement
3.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or
approximate information.
4 Undated References
4.1 Any undated reference to a code or standard appearing in the requirements of this standard shall be
interpreted as referring to the latest edition of that code or standard.
5 Glossary
5.1 For the purpose of this standard the following definitions apply.
5.2 CORROSION RESISTANCE RATIO (CRR) — A value used to compare the corrosion resistance of black steel pipe that is uncoated or unpiated to that of Schedule 40 steel pipe is determined by the following formula.UL 852 pdf download.