More Piping Layout - Pumps and Compressor

Refernce: Machinery Reliability Assessment by H. Bloch Chapter 23 page 310 from an article contributed by Bill Moustakakis Ph D.

Centrifugal Compressor
The inlet line of centrifugal compressor is designed with a minimum od 3Xdia of straight run between the inlet nozzle and the first elbow.

Pumps
Because turbulent flow through valves may advsersely affect pump reliability, prudnce requires valves to be located a sufficient distance from the suction nozzle. This is especially important where double-flow pumps are concerned. Similarly, elbows should be located at least 5Xdia away from the pump suction nozzle.

There are an illustration in the book showing what happened if the 1st elbow is very close the the equipment nozzle. On the same cChapter, there is also an article about the Pitfall and Misunderstanding related to Piping contributed by L Peng of www.ppestress.com Received on Sat Sep 08 02:49:00 2001