ASTM D7669-15
(Guide)Standard Guide for Practical Lubricant Condition Data Trend Analysis
Standard Guide for Practical Lubricant Condition Data Trend Analysis
SIGNIFICANCE AND USE
5.1 This guide is intended to provide machinery maintenance and monitoring personnel with a guideline for performing trend analysis to aid in the interpretation of machinery condition data.
SCOPE
1.1 This guide covers practical techniques for condition data trend analysis.
1.2 The techniques may be utilized for all instrumentation that provides numerical test results. This guide is written specifically for data obtained from lubricant samples. Other data obtained and associated with the machine may also be used in determining the machine condition.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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Designation: D7669 − 15
Standard Guide for
1
Practical Lubricant Condition Data Trend Analysis
This standard is issued under the fixed designation D7669; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
INTRODUCTION
This standard provides specific guidelines for trend analysis, as they are applied to condition
monitoring of machinery. The main purpose of trend analysis is to learn how rapidly the machine and
fluid are deteriorating.Asignificant change in trend is indicative of a developing failure. Intervention
in the early stages of deterioration is much more cost effective than failure of the machine.
Maximum reliability of in-service machine components and fluids requires a program of condition
monitoring to provide timely indications of performance and remaining usable life. To achieve these
goals, a condition monitoring program should monitor the rate of progression of the failure by
including sufficient tests to determine the rate of degradation, increase of contaminants, and quantity
and identity of metal debris from corrosion or wear.
The condition monitoring process determines the presence of oil-related failure modes, allowing
remedial maintenance to take place before failure and subsequently expensive equipment damage
occurs. In order to diagnose and predict machinery and fluid condition, the rate of change of machine
condition must be trended. Equipment maintainers expect conditionmonitoring information to clearly
and consistently indicate machinery condition, that is, the rate-of-change of component damage over
time and the risk of failure.
Trending utilizes a comparison of a condition parameter with time. For example, plots of a
condition-related parameter as a function of time is used to determine when the parameter is likely to
exceed a given limit. Forecasting the expected breakdown of a machine well in advance enables the
operator to minimize the machine’s downtime
1. Scope* 2. Referenced Documents
2
2.1 ASTM Standards:
1.1 Thisguidecoverspracticaltechniquesforconditiondata
D4057 Practice for Manual Sampling of Petroleum and
trend analysis.
Petroleum Products
1.2 The techniques may be utilized for all instrumentation
D4177 Practice for Automatic Sampling of Petroleum and
that provides numerical test results. This guide is written
Petroleum Products
specifically for data obtained from lubricant samples. Other
D7720 Guide for Statistically Evaluating Measurand Alarm
data obtained and associated with the machine may also be Limits when Using Oil Analysis to Monitor Equipment
used in determining the machine condition. and Oil for Fitness and Contamination
D7874 Guide for Applying Failure Mode and Effect Analy-
1.3 This standard does not purport to address all of the
sis (FMEA) to In-Service Lubricant Testing
safety concerns, if any, associated with its use. It is the
E2587 Practice for Use of Control Charts in Statistical
responsibility of the user of this standard to establish appro-
Process Control
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
1
This guide is under the jurisdiction of ASTM Committee D02 on Petroleum
Products, Liquid Fuels, and Lubricants and is the direct responsibility of Subcom-
2
mittee D02.96.04 on Guidelines for In-Services Lubricants Analysis. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved April 1, 2015. Published May 2015. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 2011. Last previous edition approved in 2011 as D7669 – 11. Standards volume information, refer to the standard’s Document Summary page on
DOI:10.1520/D7669-15. the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D7669 − 15
3.1.1 alarm, n—a means of alerting the operator that a sample is taken from a non-flowing zone, and the sample point
particular condition exists. ortubewithintheoilwasnotflushedtoremovethestagnantoil
in the tube.
3.1.2 alarm limit, n—set-point threshold used to determine
3.1.5.1 Discussion—Without a proper oil sample, oil analy-
the status of the magnitude or trend of parametric condition
sis techniques are not useful. The most fundamental issue for
data.
anyoilanalysisprogramissamplequality.Oilsamplesmustbe
3.1.2.1 Discussion—In OEM provided alarm limits
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D7669 − 11 D7669 − 15
Standard Guide for
1
Practical Lubricant Condition Data Trend Analysis
This standard is issued under the fixed designation D7669; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
INTRODUCTION
This standard provides specific guidelines for trend analysis, as they are applied to condition
monitoring of machinery. The main purpose of trend analysis is to learn how rapidly the machine and
fluid are deteriorating. A significant change in trend is indicative of a developing failure. Intervention
in the early stages of deterioration is much more cost effective than failure of the machine.
Maximum reliability of in-service machine components and fluids requires a program of condition
monitoring to provide timely indications of performance and remaining usable life. In order to
diagnose and predict machinery and fluid condition,To achieve these goals, a condition monitoring
program should monitor the rate of change must be trended. Level alarms only state how much
damage has occurred. The progression predictive or forecasting nature of condition monitoring is
based on trending in order of the failure by including sufficient tests to determine the degree of damage
and remaining useful life of the component or fluid.rate of degradation, increase of contaminants, and
quantity and identity of metal debris from corrosion or wear.
The condition monitoring process determines the presence of oil-related failure modes, allowing
remedial maintenance to take place before failure and subsequently expensive equipment damage
occurs. In order to diagnose and predict machinery and fluid condition, the rate of change of machine
condition must be trended. Equipment maintainers expect condition-monitoringconditionmonitoring
information to clearly and consistently indicate machinery condition, that is, the rate-of-change of
component damage over time and the risk of failure. The data trending procedure must automatically
adapt to equipment usage and sampling circumstances and provide numbers that reflect equipment
condition change in an incremental fashion.
Trending utilizes a comparison of a condition parameter with time. For example, plots of a
condition-related parameter as a function of time is used to determine when the parameter is likely to
exceed a given limit. Forecasting the expected breakdown of a machine well in advance enables the
operator to minimize the machine’s downtime
1. Scope Scope*
1.1 This guide covers practical techniques for condition data trend analysis.
1.2 The techniques may be utilized for all instrumentation that provides numerical test results. This guide is written specifically
for data obtained from lubricant samples. Other data obtained and associated with the machine may also be used in determining
the machine condition.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2
2.1 ASTM Standards:
D4057 Practice for Manual Sampling of Petroleum and Petroleum Products
1
This guide is under the jurisdiction of ASTM Committee D02 on Petroleum Products Products, Liquid Fuels, and Lubricants and is the direct responsibility of
Subcommittee D02.96.04 on Guidelines for In-Services Lubricants Analysis.
Current edition approved Feb. 15, 2011April 1, 2015. Published April 2011May 2015. DOI:10.1520/D7669–11.Originally approved in 2011. Last previous edition
approved in 2011 as D7669 – 11. DOI:10.1520/D7669-15.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D7669 − 15
D4177 Practice for Automatic Sampling of Petroleum and Petroleum Products
D7720 Guide for Statistically Evaluating Measurand Alarm Limits when Using Oil Analysi
...
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