1. Eccentric Reducers in Pump Piping Layout
If a reducer or swage is required in end suction or side suction, how should they be installed while planning Pump Piping Layout?
Explanation: If a reducer or swage is required in end suction or side suction, they should be eccentric reductions and installed flat on top.
2. Connections to End Suction Pumps
How should connections to end suction pumps be made?
Explanation: Connections to end suction pumps should be made with break-out spools to allow for the removal of pump internals.
3. Piping Around Pumps
How should piping around pumps be designed to facilitate pump and/or driver removal?
Explanation: Piping around pumps should be designed to provide clearance for the removal of the pump and/or driver without disturbing the piping other than disconnection of the pump.
4. Avoiding Piping Over Horizontal Pumps
Why should you avoid placing any piping directly over horizontal pumps?
Explanation: Avoid placing any piping directly over horizontal pumps to ensure access with mobile equipment for maintenance. For vertical pumps, ensure allowances have been made to access with mobile equipment for maintenance.
5. Strainer for Suction Connections
What is the recommendation for pumps with suction connections less than 2 inches in size?
Explanation: Pumps with suction connections less than 2 inches should be installed with a permanent “Y” type strainer between the suction block valve and the pump inlet connection.
6. Temporary Strainers
When should temporary strainers be used for pump protection?
Explanation: Temporary strainers should be used for the protection of pumps during the flushing and initial operating periods.
7. Removal of Temporary Strainers
What should the piping layout permit regarding the removal of temporary strainers without disturbing pump alignment?
Explanation: The piping layout shall permit the removal of temporary strainers without disturbing pump alignment.
8. Identification Tabs on Temporary Strainers
What should be provided on temporary strainers and protrude from the holding pipe flanges?
Explanation: Identification tabs on temporary strainers should be provided and protrude from the holding pipe flanges.
9. Permanent Strainers Arrangement
How should the arrangement of permanent strainers be designed to facilitate cleaning without interrupting the pumping service?
Explanation: The arrangement of permanent strainers shall permit cleaning without interrupting the pumping service. For installations equipped with a spare pump, this should be accomplished by providing a permanent strainer in the suction line of each pump.
10. Discharge Valves for Centrifugal Pumps
What should be provided in the discharge as close to the centrifugal pumps as possible?
Explanation: A block valve and a check valve shall be provided in the discharge as close to the centrifugal pumps as possible.
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- Piping Layout Engineering
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- Valve Material Specifications
- Plant Design & Layouts-OISD 118
- Isometric Management
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