scope:

(a) This Standard is a design and specification standard that covers metallic and plastic-lined sealless centrifugal pumps of horizontal, end-suction single-stage, centerline discharge design. This Standard includes dimensional interchangeability requirements and certain design features to facilitate installation and maintenance and enhance reliability and safety of ASME B73.3 pumps. It is the intent of this Standard that pumps of the same standard dimension designation from all sources of supply shall be interchangeable with respect to mounting dimensions, size, and location of suction and discharge nozzles, input shafts, baseplates, and foundation bolt holes [see Tables 1-1 through 1-5 (Tables 1-1M through 1-5M)]. Maintenance and operation requirements are not included in this Standard.

(b) This Standard has been revised to broaden the scope to include specialty designs developed for ASME B73.3 product line platforms. These specialty designs have many components in common with the ASME B73.3 models and meet the intent of the standard but not the standard's dimensional requirements. These specialty designs include pump models referred to as self-primer and single-stage low flow pumps.