Vibration Standards

If you operate or service turbomachinery you should be aware of the most important standards applicable to your machinery. With regards to vibration of turbomachinery, there are a few essential standards that will help you in determining the health of your machine, help you monitor it more successfully and ultimately assist you in investigating any design faults or damages.

 

Below we discuss the most important vibration standards, ISO 10816 and ISO 7919.

At the bottom of this page you will find a list of the recommended vibration standards for turbomachinery compiled from our extensive experience in vibration and damage analyses. This is just a selection of the huge variety of vibration standards which exist (see here for a complete list of vibration standards).

 

ISO 10816 & 7919 Standards

For most situations the overall amplitude of vibration is the most important assessment criteria, and in this regard the standards are relatively useful. The two most important standards are ISO 10816 and ISO 7919, which differ in type of the vibration being assessed:

          - Use ISO 10816 if you are measuring bearing vibration (using an accelerometer or velocity transducer, with values in mm/s or similar).

          - Use ISO 7919 if you are measuring shaft vibration (using a proximity probe, with values in µm or similar).

Both of these standards are sub-divided into different parts for machine types. To decide which standard is applicable, see below:

zigzagarrows.png

  Shaft Vibration Bearing Vibration  
  Units of µm or similar Units of mm/s or similar  
  e.g. measured with proximity probes e.g. measured with acceleromters  

Sensors-standards2.png

  More Details... More Details...  

 

Follow the links above to our more detailed explanations on using ISO 7919 and ISO 10816 to evaluate machine vibration, including vibration limits and which parts of the standards to apply.

 

Applicability

If you are considering installing vibration transducers and monitoring on a machine you should beware of the difference between measurement on rotating and non-rotating parts, in particular how the machine’s bearing and support stiffness’s affect the choice of location and method of measurement.

As a general rule, machines with rolling-element bearings tend to have high bearing stiffness and are better suited to bearing vibration measurement on the pedestal (accelerometers on non-rotating parts).Conversely, machines with fluid-film bearings on soft pedastals are better suited to shaft vibration measurement (proximity probes on rotating parts).

If you need assistance contact us here and we can advise you.

 

For large and critical turbomachinery our general recommendation is to have at least one a bearing and a one shaft vibration measurement installed at each bearing, since this covers most adequately both the vibration behaviour in the bearing (relative vibration, orbits, shaft centreline…) as well as exterior fixed body vibrations (component resonances, shaft rubbing, flow effects, gear impacts, looseness, misalignment…).

 

 

Recommended Standards

The following standards are recommended by Turbo Monitoring for all turbomachinery operators:

Standard

Title

API 612

Petroleum, Petrochemical and Natural Gas Industries-Steam Turbines-Special-purpose Applications

 

ISO 1925

Balancing Vocabulary

 

ISO 1940-1

ISO 1940-2

Balance Quality Requirements for Rotors in a Constant (Rigid) State
      Part 1: Specification and Verification of Balance Tolerances
      Part 2: Balance Errrors

 

ISO 2041

Mechanical Vibration, Shock and Condition Monitoring - Vocabulary

 

ISO 5348

Mechanical mounting of accelerometers

 

ISO 7919-1

ISO 7919-2

ISO 7919-3

ISO 7919-4

ISO 7919-5

Evaulation of Machine Vibration by Measurements on Rotating Shafts

      Part 1: General Guidelines

      Part 2: Steam Turbines and Generators >50 MW with speeds of 1500 rpm, 1800 rpm, 3000 rpm, 3600 rpm

      Part 3: Industrial Machines
      Part 4: Gas Turbines
      Part 5: Hydroelectric and Pumps

 

ISO 10816-1
ISO 10816-2
ISO 10816-3
ISO 10816-4
ISO 10816-5
ISO 10816-6

ISO 10816-7

Mechanical Vibration

      Part 1: General Guidelines

      Part 2: Steam Turbines and Generators >50 MW with speeds of 1500 rpm, 1800 rpm, 3000 rpm, 3600 rpm

      Part 3: Industrial Machines

      Part 4: Gas Turbine Sets
      Part 5: Hydroelectric and Pumping Plants
      Part 6: Reciprocating Machines above 100 kW

      Part 7: Rotordynamic Pumps

 

ISO 11342

Methods and Criteria for the Mechanical Balancing of Flexible Rotors

 

ISO 13373

Condition monitoring and diagnostics of machines -- Vibration condition monitoring

 

ISO 13374

Condition monitoring and diagnostics of machines -- Data processing, communication and presentation

 

ISO 13379

Condition monitoring and diagnostics of machines -- Data interpretation and diagnostics techniques

 

ISO 18436

Condition monitoring and diagnostics of machines -- Requirements for training and certification of personnel

 

 

 

Other Standards

 

Standard Title
VDI 3839
Instructions on Measuring and Interpreting the Vibrations of Machines

Continuous Condition Monitoring

photocon plus

Damage Investigations

damage plus

Measurement Equipment

photocon plus