ISO 20816-8:2018
Mechanical vibration — Measurement and evaluation of machine vibration — Part 8: Reciprocating compressor systems
Mechanical vibration — Measurement and evaluation of machine vibration — Part 8: Reciprocating compressor systems
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 34
- Дата публикации:
- 10 августа 2018 г.
- Издание:
- ISO IS 20816 edition 1 version 1
- ICS:
- 17.160
This document establishes procedures and guidelines for the measurement and classification of mechanical vibration of reciprocating compressor systems. The vibration values are defined primarily to classify the vibration of the compressor system and to avoid fatigue problems with parts in the reciprocating compressor system, i.e. foundation, compressor, dampers, piping and auxiliary equipment mounted on the compressor system. Shaft vibration is not considered. This document applies to reciprocating compressors mounted on rigid foundations with typical rotational speed ratings in the range 120 r/min up to and including 1 800 r/min. The general evaluation criteria which are presented relate to operational measurements. The criteria are also used to ensure that machine vibration does not adversely affect the equipment directly mounted on the machine, e.g. pulsation dampers and the pipe system. NOTE The general guidelines presented in this document can also be applied to reciprocating compressors outside the specified speed range but different evaluation criteria might be appropriate in this case. The machinery driving the reciprocating compressor, however, is evaluated in accordance with the appropriate part of ISO 10816, ISO 20816 or other relevant standards and classification for the intended duty. Drivers are not included in this document. It is recognized that the evaluation criteria might only have limited application when considering the effects of internal machine components, e.g. problems associated with valves, pistons and piston rings might be unlikely to be detected in the measurements. Identification of such problems can require investigative diagnostic techniques which are outside the scope of this document. Examples of reciprocating compressor systems covered by this document are — horizontal, vertical, V-, W- and L-type compressor systems, — constant and variable speed compressors, — compressors driven by electric motors, gas and diesel engines, steam turbines, with or without a gearbox, flexible or rigid coupling, and — dry running and lubricated reciprocating compressors. This document does not apply to hyper compressors. The guidelines are not intended for condition monitoring purposes. Noise is also outside the scope of this document.
Abstract
Overview
ISO 20816-8:2018 defines procedures and guidelines for the measurement and evaluation of mechanical vibration of reciprocating compressor systems. The standard focuses on vibration of the compressor structure, foundation, pulsation dampers, piping and directly mounted auxiliary equipment - shaft vibration and drivers are excluded. It applies to compressors on rigid foundations with typical speeds from 120 r/min to 1 800 r/min, and uses overall vibration values measured in the 2 Hz to 1 000 Hz band.
Key technical topics and requirements
- Primary measurement quantity: overall RMS vibration velocity (mm/s).
- Supplementary measurements: RMS displacement recommended if significant energy exists below the corner frequency (10 Hz); RMS acceleration recommended if above the corner frequency (200 Hz).
- Frequency corner values: 10 Hz and 200 Hz are used to convert displacement↔velocity↔acceleration and to define evaluation behavior across bands.
- Measurement locations & directions: guidance on where to measure (compressor frame, foundation, dampers, piping) and directional assessment.
- Evaluation zones & acceptance criteria: operational guidance values (velocity, displacement, acceleration) are provided to classify vibration severity and acceptability during commissioning or operation.
- Record keeping & instrumentation: requirements for instrumentation, measurement procedures, spectral analysis when values exceed limits, and information to record with results.
- Special topics: normative guidance on small bore connections (SBC) to assess vibration transmission to branch piping (Annex E).
- Limitations: not intended as a condition-monitoring standard; internal component faults (valves, piston rings) may not be detected and may require diagnostic techniques outside the scope.
Practical applications
- Commissioning and factory acceptance testing of reciprocating compressors to verify compliance with vibration acceptance criteria.
- Site acceptance and operational checks to confirm structure, foundation and piping are not exposed to damaging vibration levels.
- Design review and vibration mitigation (foundation design, isolation, pulsation dampers) to prevent fatigue of attached equipment and piping.
- Vendor/purchaser specification language to set measurable acceptance limits during procurement.
Who should use ISO 20816-8
- Plant and rotating equipment engineers
- Vibration analysts and test technicians
- Compressor manufacturers and vendors
- Piping designers and mechanical integrity teams
- Commissioning and maintenance personnel
Related standards
- ISO 20816-1 and ISO 10816 series (general machine vibration evaluation)
- ISO 2041 (vibration vocabulary)
ISO 20816-8 is essential when specifying and verifying acceptable reciprocating compressor vibration to reduce fatigue risks to foundations, dampers and piping, while providing standardized measurement and reporting practices.
Технические детали
- Технический комитет
- ISO/TC 108/SC 2 - Measurement and evaluation of mechanical vibration and shock as applied to machines, vehicles and structures
- SKU
- ISO 20816-8:2018
Похожие стандарты
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