scope:

This International Standard specifies requirements for centrifugal pumps, including pumps running in reverse as hydraulic power recovery turbines, for use in petroleum, petrochemical and gas industry process services.
Note: ISO 9905, ¡§Technical specifications for centrifugal pumps ¡V Class 1¡¨, may be more applicable
for heavy duty applications in industries other than petroleum, petrochemical and gas processes.
This International Standard is applicable to overhung pumps, between-bearings pumps and verticallysuspended pumps (see Table 1). Clause 9 provides requirements applicable to specific types of pump. All other clauses of this International Standard are applicable to all pump types. Illustrations are provided of the various specific pump types and the designations assigned to each specific type.
Notes following a clause are informative.
Relevant industry operating experience suggests pumps produced to this International Standard are cost effective when pumping flammable or hazardous liquids at conditions exceeding any one of the following:
Discharge pressure 1900 kPa (275 psig)
Suction pressure 500 kPa (75 psig)
Pumping temperature 150°C (300°FC)
Rotative speed 3600 rpm
Rated total head 120 m (400 ft)
Impeller diameter, overhung pumps 330 mm (13 in)
For sealless pumps, refer to API Standard 685. This International Standard is not applicable to sealless pumps.