Reaffirmed 2019

NATIONAL FOREWORD

This Indian Standard (Part 4) which is identical with ISO 10816-4 : 2009 ‘Mechanical vibration - Evaluation of machine vibration by measurements on non-rotating parts - Part 4: Gas turbine setswith fluid-film bearings’ issued by the International Organization for Standardization (ISO) was adopted by the Bureau of Indian Standards on the recommendation of the Mechanical Vibration and Shock Sectional Committee and approval of the Mechanical Engineering Division Council.

This standard Supersedes IS 14817 (Part 4) : 2004 ‘Mechanical Vibration - Evaluation of machine vibration by measurements on Non-Rotating Parts-Part 4-Gas turbines driven sets excluding aircraft derivatives’.

ISO 10816-1 is the basic part of ISO 10816 giving the general requirements for evaluating the vibration of various machine types when the vibration measurements are made on non-rotating parts. This part of ISO 10816 gives specific provisions for assessing the severity of the vibration measured on thebearing housings or pedestals of gas turbine sets. Measurements at these locations characterize the sets of vibration reasonably well. Evaluation criteria, based on previous experience, are presented. These can be used for assessing the vibratory condition of such machines.

Two criteria are provided for assessing the machine vibration when operating under steady state conditions. One criterion considers the magnitude of the observed vibration; the second consider the changes in the magnitude. In addition different criteria are provided for transient operating condition. However the vibration on non - rotating parts does not form the only basis for judging the severity of vibration. For gas turbine sets, it is also common to judge the vibration based on the measurements taken on the rotating shafts. For shaft vibration measurements requirements, see IS 14773 (Part 1) : 2000 ‘Mechanical vibration of non-reciprocating machines Measurements on rotating shafts and evaluation: Part 1 General guidelines’and IS/ISO 7919-4:2009 ‘Mechanical vibration - Evaluation of machine vibration by measurements on rotation shafts:Part 4 Gas turbine sets with fluid film bearing’.

Under the general title ‘Mechanical vibration - Evaluation of machine vibration by measurements on non-rotating parts’, the standard is in seven parts, other parts are asfollowing:

Part 1 General guidance

Part 2 Land - based steam turbines and generators in excess of 50 MW with the normal operating speeds of 1500 r/min, 1 800 r/min, 3000 r/min and 3 600 r/min

Part 3 Industrial machines with the nominal power above 15 KW and nominal speeds between 120 r/min and 1500 r/min when measured in situ

Part 5 Machine sets in hydraulic power generating and pumping plants

Part 6 Reciprocating machines with the power rating above 100 kW

Part 7 Rotodynamic pumps for industrial applications, including measurements on rotating shafts

The text of ISO Standard has been approved as suitable for publication as an Indian Standard without deviations. Certain conventions are however not identical to those used in Indian Standards. Attention is particularly drawn to the following:

a) Wherever the words ‘International Standard’ appear referring to this standard, they should be read as ‘Indian Standard’.

b) Comma (,) has been used as a decimal marker while in Indian Standards, the current practice is to use a point (.) as the decimal marker.