In the market and industry, you may find different application and construction of centrifugal pumps. The most frequently find is API 610 Pump and ANSI/ASME B73.1 Centrifugal Pump.
The API 610 pump will be selected for handling Hydrocarbon fluid, while ANSI pump can be used for non critical operation and services.
The overview of each standard requirement is provided below,
API 610 Pump.
- Full faced flange.
- Centerline mounting support.
- Not allowed for Bearing Housing support.
- Bearing type : Duplex, Single row,angular contact.
- Impeller mounting with keyed.
- Wear rings on the casing and impeller.
- Seals system as per API 682.
- Required seal chamber throat bushing.
- Use sock weld or butt weld for auxilliary connections and sch 160 as minimum for the auxilliary piping.
ANSI/ASME B73.1
- Foot under the casing.
- Bearing Housing support is acceptable.
- Bearing type : not specified
- Impeller mounting with keyed or threaded.
- Wear rings are not specified.
- No specific requirement for sealing system.
- Not specified for the seal chamber throat bushing.
- Use Threaded NPT for auxilliary connections and sch 40 as minimum for the auxilliary piping.
It is clearly indicated the requirement of API 610 is more stringent than ANSI Pump. As addition to that, ANSI pump is limited for low pressure application.
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