3 replies to this topic

[omnibus]

Note-4 of the above mentioned topic says 'The head-capacity curve at 100% speed shall extend to at least 115% of the capacity of the CRP'.

Will anybody explain as to what this term 'extend to' means?

Thanks in advance.

[omnibus]

BUMP, BUMP, BUMPITY BUMP.

[latexman]

If I knew what CRP was, I might be able to help.

[Art Montemayor]

As per API 617, 7th Edition, July 2002:

Note 4 on Figure 2.1-1a – Illustration of Terms reads in its entirety as follows:

“The head-capacity curve at 100% speed shall extend to at least 115% of the capacity of the CRP. Head-capacity curves at other speeds shall be extended to equivalent capacity at each speed. For example, the head-capacity curve at 105% speed shall be extended to at least 1.05 times 1.15 times the capacity of the CRP; the head-capacity curve at 90% speed shall be extended at least 0.9 times 1.15 times capacity of the CRP; and so on. These points define the ‘approximate capacity limit’ curve.”

In the previous Note 3, CRP is defined as “Compressor Rated Point”.