UL 448:2020 pdf download.STANDARD FOR SAFETY-Centrifugal Stationary Pumps for Fire- Protection Service.
1.1 These requirements cover stationary centrifugal fire pumps intended for use in water-supply systems for fire-protection service.
1.2 The pumps covered by these requirements are intended for installation and use in accordance with the Standard for the Installation of Stationary Pumps for Fire Protection, NFPA 20.
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b) Is superseded by a requirement in this standard.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 Where values of measurement are specified in both SI and U. S. Customary units, it is the responsibility of the user of this standard to determine the unit of measurement appropriate for the user’s needs.
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 Normative References
5.1 The following standards are referenced in this standard, and portions of these referenced standards may be essential for compliance.
American Bearing Manufacturers Association (ABMA) Standards
ANSI/ABMA 9 Standard for Load Ratings and Fatigue Life for Ball Bearings ANSI/ABMA 11, Load Ratings and Fatigue Life for Roller Bearings
American Society of Mechanical Engineers (ASME) Standards
ANSI/ASME BI 6.1, Standard for Cast Iron Pipe Flanges and Flanged Fittings.UL 448 pdf download.