Standards Development

Scope

This document specifies the general requirements for evaluating the vibration of various coupled industrial machine types with operating speeds between 120 r/min and 30 000 r/min when measurements are made in-situ. This document gives guidelines for applying evaluation criteria for measurements taken on non-rotating and rotating parts under normal operating conditions. The guidelines are presented in terms of both steady running vibration values and in terms of changes to vibration magnitude, which can occur in these steady values.

This document is applicable to the following machine types:

a) steam turbines and generators with outputs less than or equal to 40 MW (see Note 1 and Note 2);

b) steam turbines and generators with outputs greater than 40 MW which normally operate at speeds other than 1 500 r/min, 1 800 r/min, 3 000 r/min or 3 600 r/min (although generators seldom fall into this category) (see Note 1);

c) rotary compressors;

d) industrial gas turbines with outputs less than or equal to 3 MW (see Note 2);

e) turbofans;

f) electric motors of any type, if the coupling is flexible. When a motor is rigidly coupled to a machine type covered by any other part of ISO 20816, see also that other part;

g) rolls and mills;

h) conveyors;

i) variable speed couplings; and

j) blowers or fans (see Note 3).

The vibration criteria presented in this document are generally only applicable to fans with power ratings greater than 300 kW or which are not flexibly supported. Classifications can be agreed between the machine manufacturer and the customer using results of previous operational experience (also see ISO 14694).

This document is applicable to machinery including a gear unit ISO 20816-9 contains information for special acceptance tests related to gear units.

This document is not applicable to the following types of industrial machines:

k) land-based gas turbines, steam turbines and generators with power outputs greater than 40 MW and speeds of 1 500 r/min, 1 800 r/min, 3 000 r/min or 3 600 r/min (see ISO 20816‑2);

l) gas turbine sets with power outputs greater than 3 MW (see ISO 20816‑4);

m) machine sets in hydraulic power generating and pumping plants covered by ISO 20816‑5;

n) reciprocating machines and machines solidly coupled to reciprocating machines (see ISO 10816‑6);

o) rotordynamic pumps and any integrated or solidly coupled electric motors where the impeller is mounted directly on the motor shaft or is rigidly attached to it (see ISO 10816‑7);

p) reciprocating compressor systems (see ISO 20816-8);

q) rotary positive displacement compressors (e. g. screw compressors);

r) submerged motor-pumps; and

s) wind turbines (see ISO 20816‑21).

This document is applicable to in-situ broad-band vibration measurements taken on the shafts, bearings, bearing pedestals or housings of machines under steady-state operating conditions within their nominal operating speed range. The requirements relate to both acceptance testing and operational monitoring. The evaluation criteria can be applied to both continuous and non-continuous monitoring situations.

This document is applicable to machines which have gears or rolling bearings but does not address the diagnostic evaluation of the condition of those gears or bearings.

This document is applicable only for the vibration produced by the machine set itself and not for vibration that is transmitted to the machine set from external sources.