Once the pump has been selected, what generally determines the height of the pump foundation? Or determine it based on one’s own experience?

According to clause 3.0.4 of HG/T 20643-1998 \"Specifications for the Foundation Design of Chemical Equipment\", the top surface of the foundation should be at least 200 mm above the ground level, and its burial depth should be at least 0.8 m. For your reference.

Do you have the electronic version of the standard \"HG/T 20643-1998 Specifications for the Basic Design of Chemical Equipment\"?

It depends on the requirements for pipeline layout; otherwise, you won’t be able to run the pipes there

The installation height also needs to be determined based on the pump’s net positive suction head to prevent cavitation.

It is generally determined based on the aesthetics of the piping; a margin against cavitation and head are only considered in special cases

HG/T 20643-1998 \"Specifications for the Basic Design of Chemical Equipment\" does indeed specify that the top surface of the foundation should be at least 200 mm above the ground level; this is intended to facilitate installation (such as the installation of pumps, as well as pipes and valves). . . ), its burial depth should not be less than 0.8m to accommodate the holes for bolts. Some manufacturers will specify the dimensions on the product samples; in most cases, the sizes are determined based on experience, with a certain amount of margin included. However, this regulation applies only to the conditions specified for civil engineering projects; you need to list the static load, power, model, etc. of the pump. After that, the civil engineering team recalculates the dynamic loads on the motors, etc., and finally determines the dimensions of the foundations for the specific equipment.

I’m not very familiar with the regulations, but 200MM is definitely necessary; generally we set it at 300MM. You don’t want the pump to be submerged in water in case of flooding, and there also needs to be enough space for the maintenance of the pipes (on the suction side). Therefore, a height of 300MM is essential.

It usually needs to be at a certain height above the ground; it’s fine for indoor use, but for outdoor use it must be even higher, otherwise heavier rain could cause flooding； Another factor to consider is the pressure at the pump inlet; naturally, a higher inlet pressure is better. The higher the pressure, the less work the pump needs to perform, and the greater the net positive suction head available. This is particularly important for pumps used with low-temperature liquids.

It is generally 200~300mm, but it needs to be determined based on the installation height of the inlet filter.

It can’t be generalized; large pumps can be set at 100, and indoor pumps can also be 100.

That’s right; the standard pump foundation is 200, but for some pumps such as metering pumps, it can be increased slightly to meet the requirements of the piping installation.

NPSH doesn’t need to be considered; as long as it facilitates pipeline installation as well as equipment inspection, repair, and maintenance, that’s sufficient!

The pump foundation is preferably square in shape, and its height should be kept low enough to meet the pump’s net positive suction head requirement. The distance from the center of the threaded holes to the edge of the pump foundation should be between 100 and 150 mm

The minimum height of the pump foundation must be greater than 100 mm

It is generally 200 mm above the ground level; large pumps can be up to 100 mm higher, while small pumps and similar devices can be 300–500 mm higher, and they can share the same foundation