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BS ISO 21940-13:2012

Current
Current

The latest, up-to-date edition.

Mechanical vibration. Rotor balancing Criteria and safeguards for the insitu balancing of medium and large rotors
Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

30-04-2012

Publisher

British Standards Institution

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 In-situ balancing
5 Criteria for performing in-situ balancing
6 Safeguards
7 Measurements
8 Operational conditions
9 Reporting
Annex A (normative) - Precautions and safeguards for
        specific machine types during in-situ balancing
Annex B (informative) - Example of an in-situ balancing
        report for a boiler fan <= 1 MW
Annex C (informative) - Example of an in-situ balancing
        report for a large > 50 MW turbine generator set
Bibliography

Describes procedures to be adopted when balancing medium and large rotors installed in their own bearings on site.

This part of ISO21940 specifies procedures to be adopted when balancing medium and large rotors installed in their own bearings on site. It addresses the conditions under which it is appropriate to undertake in-situ balancing, the instrumentation required, the safety implications and the requirements for reporting and maintaining records.

This part of ISO21940 can be used as a basis for a contract to undertake in-situ balancing.

It does not provide guidance on the methods used to calculate the correction masses from measured vibration data.

NOTE The procedures covered in this part of ISO21940 are suitable for medium and large machines. However, many of the principles are equally applicable to machines of a smaller size, where it is necessary to maintain good records of the vibration behaviour and the correction mass configurations.

Committee
GME/21/5
DevelopmentNote
Supersedes BS ISO 20806. (04/2012)
DocumentType
Standard
Pages
34
PublisherName
British Standards Institution
Status
Current
Supersedes

Standards Relationship
ISO 21940-13:2012 Identical

ISO 13373-1:2002 Condition monitoring and diagnostics of machines — Vibration condition monitoring — Part 1: General procedures
ISO 1940-1:2003 Mechanical vibration Balance quality requirements for rotors in a constant (rigid) state Part 1: Specification and verification of balance tolerances
ISO 1925:2001 Mechanical vibration Balancing Vocabulary
ISO 2954:2012 Mechanical vibration of rotating and reciprocating machinery — Requirements for instruments for measuring vibration severity
ISO 10817-1:1998 Rotating shaft vibration measuring systems Part 1: Relative and absolute sensing of radial vibration

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PDF - English
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