This text provides general guidelines for pump piping. These are meant to provide a broad outline of pump piping
requirements. Specific requirements will vary with project piping design criteria and operator experience.
- Reducers on pump suction will be eccentric with top flat. Exception is slurry lines where the reducer will
be flat on bottom.
- All valves in suction or discharge lines shall be accessible for operation by hand or provided with chains or
stem extensions. Chain or stem extensions are prohibited by some operators.
- Suction piping should be as short as possible and free from any pockets. When handling products at temperatures
near their flash point, pump suction lines shall be arranged to minimize line pressure drop and prevent vapour lock.
- Suction and discharge piping must be identified as stress critical lines and reviewed by the stress group to ensure that
the piping does not impose excessive load on pump casing. Pipe supports shall be designed so that excessive weight and
thermal stresses are not applied to the pump casings.
- Piping should not routed over pumps at an elevation of less than 3000mm.
- Grade level supports at pumps shall be installed on an integral extension of the equipment foundation in order to
avoid problems caused by differential settlement.
- Suction and discharge piping must be arranged such that no piping interferes with the removal or repair of the pumps.
- Pumps that are a potential source of fire should not be located under piperacks.