ASTM D4248-98(2003)

Standard Practice for Design of Steam Turbine Generator Oil Systems (Withdrawn 2008)

SIGNIFICANCE AND USE
The purpose of this guide for turbine generator oil systems is to ensure that:
3.1.1 Lubrication, control, and sealing will be performed satisfactorily by the oil in a manner mutually acceptable to the parties concerned.  
3.1.2 Installation, cleaning, and flushing will be facilitated.
3.1.3 Satisfactory system cleanliness can be maintained.
3.1.4 Safe practices are observed.
SCOPE
1.1 This practice is applicable to steam turbine-generator units and provides recommended practices for the design of the oil system.
1.1.1 The oil system is defined as that assembly which uses and circulates the turbine-generator lubricating oil. The oil system generally includes high pressure, bearing, control, generator seal, and drain systems. The system may also include the supply and return lines for a boiler feed pump and hydraulic coupling.
1.2 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.
WITHDRAWN RATIONALE
This practice is applicable to steam turbine-generator units and provides recommended practices for the design of the oil system.
This practice is being withdrawn due to lack of interest and support for its continued use.
Formerly under the jurisdiction of Committee D02 on Petroleum Products and Lubricants, this practice was withdrawn in October 2008.

General Information

• Status: Withdrawn
• Publication Date: 31-Oct-2003
• Withdrawal Date: 02-Dec-2008
• Technical Committee: D02 - Petroleum Products, Liquid Fuels, and Lubricants
• Drafting Committee: D02.C0.01 - Turbine Oil Monitoring, Problems and Systems

Relations

• Replaces: ASTM D4248-98 - Standard Practice for Design of Steam Turbine Generator Oil Systems
• Effective Date: 01-Nov-2003
• Referred By: ASTM D6439-23 - Standard Guide for Cleaning, Flushing, and Purification of Steam, Gas, and Hydroelectric Turbine Lubrication Systems
• Effective Date: 01-Nov-2003

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
An American National Standard
Designation:D4248–98 (Reapproved 2003)
Standard Practice for
1
Design of Steam Turbine Generator Oil Systems
This standard is issued under the fixed designation D 4248; 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 (e) indicates an editorial change since the last revision or reapproval.
INTRODUCTION
The ever-increasing size and complexity of steam turbine generators makes the oil system more
important than ever. The system is required to provide not only lubrication but surface protection,
cooling, sealing, and control as well. Failure in any one of these functions could result in damage to
expensive equipment with loss of system capability and increased generation costs due to the use of
less efficient equipment or the purchase of power through interconnections.
Thispracticehasresultedfromaculminationoftheexperiencesoftheturbinebuilders,theerectors,
the oil suppliers and the operators. Out of necessity, it is a generalized and minimal standard. Previous
issues of this standard have been used in specifications to aid in obtaining satisfactory performance of
the lubricating oil system.
1. Scope 3. Significance and Use
1.1 This practice is applicable to steam turbine-generator 3.1 The purpose of this guide for turbine generator oil
unitsandprovidesrecommendedpracticesforthedesignofthe systems is to ensure that:
oil system. 3.1.1 Lubrication, control, and sealing will be performed
1.1.1 The oil system is defined as that assembly which uses satisfactorily by the oil in a manner mutually acceptable to the
and circulates the turbine-generator lubricating oil. The oil parties concerned.
system generally includes high pressure, bearing, control, 3.1.2 Installation, cleaning, and flushing will be facilitated.
generator seal, and drain systems.The system may also include 3.1.3 Satisfactory system cleanliness can be maintained.
thesupplyandreturnlinesforaboilerfeedpumpandhydraulic 3.1.4 Safe practices are observed.
coupling.
4. System Components
1.2 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the 4.1 Materials:
4.1.1 Steel piping, tubing, valves, fittings, and fabrication
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica- plates are acceptable and recommended. The use of catalytic
and corrodible materials, such as copper, zinc, and lead, should
bility of regulatory limitations prior to use.
be minimized, and if used, they should be properly alloyed.
2. Referenced Documents
Bearing linings should be made of tin base babbitt.
2
2.1 ISO Standard: 4.1.2 All materials used in system construction, including
ISO 4572 Hydraulic fluid power filters-multi-pass method gaskets, seals, diaphragms, interior permanent type surface
for evaluating filtration performance coatings, and hoses, should be resistant to turbine oils and
maintain adequate physical and chemical properties at the
maximum expected operating temperatures and service life.
1
This practice is under the jurisdiction of ASTM Committee D02 on Petroleum
4.2 Pumps:
ProductsandLubricantsandisthedirectresponsibilityofSubcommitteeD02.C0on
4.2.1 Pumps must circulate lubricating oil from the reser-
Turbine Oils.
All previous recommended practices have been published by ASME as joint
voir to the bearings, controls, and other points of use. The
ASTM-ASME-NEMA standards. With the issuance of this document, all standards
pressure level must be high enough to ensure proper distribu-
under the auspices of Subcommittee C ofASTM Committee D02 will be published
tion and satisfy control functions.
byASTM asASTM standards. This standard replacesASME Standard Practice No.
116. 4.2.1.1 Satisfactory circulation and pressure levels must be
Current edition approved Nov. 1, 2003. Published November 2003. Originally
provided for start-up, operation, and shut down.
approved in 1983. Last previous edition approved in 1998 as D 4248-98.
4.2.2 Several commonly used pumps are defined as follows:
2
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D4248–98 (2003)
4.2.2.1 The main pump normally supplies the oil circulation 4.3.1 The capacity of the reservoir should be sufficient to
and pressure for the steam turbine generator operation. hold the sum of the operating oil volume contained within the
normaloperatingrangeplusthevolumethatwilldrainfromthe
4.2.2.2 The auxiliary
...