ASTM D8112-24
(Guide)Standard Guide for Obtaining In-Service Samples of Turbine Operation Related Lubricating Fluid
Standard Guide for Obtaining In-Service Samples of Turbine Operation Related Lubricating Fluid
SIGNIFICANCE AND USE
5.1 Fluid analysis is one of the pillars in determining fluid and equipment conditions. The results of fluid analysis are used for planning corrective maintenance activities, if required.
5.2 The objective of a proper fluid sampling process is to obtain a representative fluid sample from critical location(s) that can provide information on both the equipment and the condition of the lubricant or hydraulic fluid.
5.3 The additional objective is to reduce the probability of outside contamination of the system and the fluid sample during the sampling process.
5.4 The intent of this guide is to help users in obtaining representative and repeatable fluid samples in a safe manner while preventing system and fluid sample contamination.
SCOPE
1.1 This guide is applicable for collecting representative fluid samples for the effective condition monitoring of steam and gas turbine lubrication and generator cooling gas sealing systems in the power generation industry. In addition, this guide is also applicable for collecting representative samples from power generation auxiliary equipment including hydraulic systems.
1.2 The fluid may be used for lubrication of turbine-generator bearings and gears, for sealing generator cooling gas as well as a hydraulic fluid for the control system. The fluid is typically supplied by dedicated pumps to different points in the system from a common or separate reservoirs. Some large steam turbine lubrication systems may also have a separate high pressure pump to allow generation of a hydrostatic fluid film for the most heavily loaded bearings prior to rotation. For some components, the lubricating fluid may be provided in the form of splashing formed by the system components moving through fluid surfaces at atmospheric pressure.
1.3 Turbine lubrication and hydraulic systems are primarily lubricated with petroleum based fluids but occasionally also use synthetic fluids.
1.4 For large lubrication and hydraulic turbine systems, it may be beneficial to extract multiple samples from different locations for determining the condition of a specific component.
1.5 The values stated in SI units are regarded as standard.
1.5.1 The values given in parentheses are for information only.
1.6 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D8112 − 24
Standard Guide for
Obtaining In-Service Samples of Turbine Operation Related
1
Lubricating Fluid
This standard is issued under the fixed designation D8112; 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
Oil analysis is one of widely accepted condition monitoring techniques by the modern industry. This
technology, however, depends on obtaining a representative sample of the fluid from the operating
system. Although some information on sampling procedure for condition monitoring is provided in a
number of different standards, there is a lack of a clear reference addressing all related issues in one
document. The intent of this standard is an attempt to provide all critical information related to fluid
sampling for condition monitoring from steam and gas turbines as well as from other auxiliary
equipment in power generating industry in one document.
1. Scope* 1.5 The values stated in SI units are regarded as standard.
1.5.1 The values given in parentheses are for information
1.1 This guide is applicable for collecting representative
only.
fluid samples for the effective condition monitoring of steam
1.6 This standard does not purport to address all of the
and gas turbine lubrication and generator cooling gas sealing
systems in the power generation industry. In addition, this safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
guide is also applicable for collecting representative samples
from power generation auxiliary equipment including hydrau- priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use.
lic systems.
1.7 This international standard was developed in accor-
1.2 The fluid may be used for lubrication of turbine-
dance with internationally recognized principles on standard-
generator bearings and gears, for sealing generator cooling gas
ization established in the Decision on Principles for the
as well as a hydraulic fluid for the control system. The fluid is
Development of International Standards, Guides and Recom-
typically supplied by dedicated pumps to different points in the
mendations issued by the World Trade Organization Technical
system from a common or separate reservoirs. Some large
Barriers to Trade (TBT) Committee.
steam turbine lubrication systems may also have a separate
high pressure pump to allow generation of a hydrostatic fluid
2. Referenced Documents
film for the most heavily loaded bearings prior to rotation. For
2
some components, the lubricating fluid may be provided in the 2.1 ASTM Standards:
form of splashing formed by the system components moving B117 Practice for Operating Salt Spray (Fog) Apparatus
through fluid surfaces at atmospheric pressure. D923 Practices for Sampling Electrical Insulating Liquids
D3326 Practice for Preparation of Samples for Identification
1.3 Turbine lubrication and hydraulic systems are primarily
of Waterborne Oils
lubricated with petroleum based fluids but occasionally also
D4057 Practice for Manual Sampling of Petroleum and
use synthetic fluids.
Petroleum Products
1.4 For large lubrication and hydraulic turbine systems, it
D4175 Terminology Relating to Petroleum Products, Liquid
may be beneficial to extract multiple samples from different
Fuels, and Lubricants
locations for determining the condition of a specific compo-
D4289 Test Method for Elastomer Compatibility of Lubri-
nent.
cating Greases and Fluids
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.C0.01 on Turbine Oil Monitoring, Problems and Systems. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved March 1, 2024. Published March 2024. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 2017. Last previous edition approved in 2022 as D8112 – 22. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/D8112-24. 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 ----------------------
D8112 − 24
D4378 Practice for In-Service Monitoring of Mi
...
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: D8112 − 22 D8112 − 24
Standard Guide for
Obtaining In-Service Samples of Turbine Operation Related
1
Lubricating Fluid
This standard is issued under the fixed designation D8112; 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
Oil analysis is one of widely accepted condition monitoring techniques by the modern industry. This
technology, however, depends on obtaining a representative sample of the fluid from the operating
system. Although some information on sampling procedure for condition monitoring is provided in a
number of different standards, there is a lack of a clear reference addressing all related issues in one
document. The intent of this standard is an attempt to provide all critical information related to fluid
sampling for condition monitoring from steam and gas turbines as well as from other auxiliary
equipment in power generating industry in one document.
1. Scope*
1.1 This guide is applicable for collecting representative fluid samples for the effective condition monitoring of steam and gas
turbine lubrication and generator cooling gas sealing systems in the power generation industry. In addition, this guide is also
applicable for collecting representative samples from power generation auxiliary equipment including hydraulic systems.
1.2 The fluid may be used for lubrication of turbine-generator bearings and gears, for sealing generator cooling gas as well as a
hydraulic fluid for the control system. The fluid is typically supplied by dedicated pumps to different points in the system from
a common or separate reservoirs. Some large steam turbine lubrication systems may also have a separate high pressure pump to
allow generation of a hydrostatic fluid film for the most heavily loaded bearings prior to rotation. For some components, the
lubricating fluid may be provided in the form of splashing formed by the system components moving through fluid surfaces at
atmospheric pressure.
1.3 Turbine lubrication and hydraulic systems are primarily lubricated with petroleum based fluids but occasionally also use
synthetic fluids.
1.4 For large lubrication and hydraulic turbine systems, it may be beneficial to extract multiple samples from different locations
for determining the condition of a specific component.
1.5 The values stated in SI units are regarded as standard.
1.5.1 The values given in parentheses are for information only.
1
This guide is under the jurisdiction of ASTM Committee D02 on Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of Subcommittee
D02.C0.01 on Turbine Oil Monitoring, Problems and Systems.
Current edition approved May 1, 2022March 1, 2024. Published May 2022March 2024. Originally approved in 2017. Last previous edition approved in 20172022 as
D8112 – 17.D8112 – 22. DOI: 10.1520/D8112-22.10.1520/D8112-24.
*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 ----------------------
D8112 − 24
1.6 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, health, and environmental practices and determine the applicability of
regulatory limitations prior to use.
1.7 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
B117 Practice for Operating Salt Spray (Fog) Apparatus
D923 Practices for Sampling Electrical Insulating Liquids
D3326 Practice for Preparation of Samples for Identification of Waterborne Oils
D4057 Practice for Manual Sampling of Petroleum and Petroleum Products
D4175 Terminology Relating to Petroleum Products, Liquid Fuels, and Lubricants
D4289 Test Method for Elastomer Compatibility of Lubricating Greases and Fluids
D4378 Practice for In-Service Monitoring of Mineral Turbine Oils for Steam, Gas, and Combined Cycle Turbines
D6224 Practice for
...
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