INTERVIEW QUESTIONS #6
ROTATING EQUIPMENT #01
Selection and application of grouting for rotating equipment is one of the important parameters in the performance of equipment. Grouting is the intermediate material between the foundation and the mounting plate of the equipment. Some interview questions related to grouting and mounting plate are discussed here.
1. What is mean by grout?
An epoxy or cementatious material used to provide a uniform foundation support and load transfer link for the installation of rotating machinery. This material is typically placed between a piece of equipment’s concrete foundation and its mounting plate.
2. What are the different types of grouts used in rotating machinery?
Cementatious grout, Epoxy grout, rapid-flow grouts, Non-Shrink Cementatious grout are some of the grouts used in rotating machinery.
3. What is mean by cementatious grout?
A type of grout material that is portland cement based.
Cementitious grouts are suitable as “filler” materials in less demanding applications where vibration, dynamic loading, and temperature extremes are not a concern. This type of grout is typically used as a “filler” inside structural steel baseplates to increase damping and reduce vibration transmission or for use on “static” equipment where vibration is not a concern.
4. What is mean by epoxy grout?
A type of grout material that consists of a resin base that is mixed with a curing agent (hardener) and usually an aggregate filler.
Epoxies typically have over three times the compressive strength of cementitious grouts and tend to have a longer useful service life. Epoxy grouts are also available that are resistant to chemical attack.
5. What is mean by grout pin?
A metallic pin or dowel used to tie an epoxy grout pour to its concrete foundation to prevent delamination (or edge lifting) due to differential thermal expansion between the grout and the concrete.
6. What is mean by head box?
A device used to funnel grout into a baseplate grout fill-hole so as to provide a static head to aid in filling all baseplate cavities with grout.
7. What is mean by mounting plate of a rotating equipment?
A device used to attach equipment to concrete foundations; includes baseplates, soleplates, and chockplates. A mounting plate is a base-support mechanism for the attached machinery and all individual pieces of machinery are expected to be removable from the mounting plate as a single assembly.
8. What is mean by baseplate of a rotating equipment?
A fabricated (or cast) metal structure used to mount, support, and align, machinery and its auxiliary components. Baseplates may be directly grouted to concrete foundations (after proper leveling) or bolted to pre-grouted chockplates.
9. What is mean by soleplate of a rotating equipment?
A solid steel (or alloy steel) plate with a machined top surface that is grouted to a concrete foundation to support and maintain alignment of machinery.
10. What is mean by chockplate of a rotating equipment?
A solid steel (or alloy steel) plate with a machined top surface that is grouted to a concrete foundation to support and maintain alignment of a machinery structural steel baseplate.
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