ASTM F1338-91(2019)

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: F1338 − 91 (Reapproved 2019) An American National Standard
Standard Guide for
Main Propulsion Medium Speed Marine Diesel Engines
Covering Performance and Minimum Scope of Assembly
This standard is issued under the fixed designation F1338; 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.
1. Scope 2.3 ISO Standard:
ISO 3046/1 Reciprocating Internal Combustion Engines —
1.1 This guide covers performance and minimum scope of
Performance
assembly of all medium speed marine diesel engines intended
2.4 Code of Federal Regulations:
for main propulsion of single or multiple screw propelled
United States Coast Guard Regulations as Published in Code
marine vessels or for vessels using other than screw propeller-
of Federal Regulations No. 46 (CFR 46)
type main propulsion.
1.2 This guide is intended to supplement the regulations of
3. Terminology
legally constituted regulating authorities. In the event of any
3.1 Definitions of Terms Specific to This Standard:
conflict, which may become apparent after publication of this
3.1.1 diesel engine, n—a reciprocating or rotary engine in
guide, with such legally constituted regulations, the latter shall
whichignitionofthemainfuelcharge,asitisintroducedtothe
takeprecedence,asmaybeapplicablewithinthejurisdictionof
combustionchamber,shallbebytheheatofcompressionofthe
such authorities and specific to each case, unless such latter
charge of combustion air, during regular operation of the
regulations are formally waived by proper cognizant authority.
engine from idle speeds up to full speed, regardless of whether
1.3 This guide is not intended to relieve the purchaser of the
miscellaneous methods to augment such heat of compression
obligation fully to advise the engine builder of all of the
are used to facilitate starting of the engine under normal
purchaser’s unique operational considerations to allow those
conditions or under low ambient temperature conditions or low
considerations to be satisfied.
intake air temperature conditions. Engines that are designed to
operate with a continuously hot spot or bulb or other device to
1.4 This international standard was developed in accor-
facilitate ignition or combustion, or both, of low cetane fuels,
dance with internationally recognized principles on standard-
or any fuels slow to ignite or to burn, or both, shall be
ization established in the Decision on Principles for the
considered to be diesel engines for purposes of this guide.
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
3.1.2 engine assembly, n—contains, but is not necessarily
Barriers to Trade (TBT) Committee.
limited to, that apparatus secured to or applied to a basic
engine, which is needed to make the basic engine operable and
2. Referenced Documents
capable of developing its rated power as indicated or to be
indicated on the engine nameplate.
2.1 ABS Standard:
3.1.3 fuel map, n—a chart on which there is displayed a
Rules for Building and Classing Steel Vessels
family of curves of various constant rates of specific fuel
2.2 IEEE Standard:
consumption, each curve of the family being plotted on a grid,
Standard No. 45 Recommended Practice for Electrical In-
the abscissa of which is engine r/min and the ordinate of which
stallations on Shipboard
is brake horse power or brake mean effective pressure.
3.1.4 medium speed diesel engine, n—all diesel engines
withcrank-shaftrotativespeedsencompassedbythemaximum
This guide is under the jurisdiction of ASTM Committee F25 on Ships and
continuous speed bracket of 400 to 600 r/min (see Appendix
Marine Technology and is the direct responsibility of Subcommittee F25.11 on
X1).
Machinery and Piping Systems.
Current edition approved Dec. 1, 2019. Published January 2020. Originally
approved in 1991. Last previous edition approved in 2013 as F1338 – 91 (2013).
DOI: 10.1520/F1338-91R19. Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
Available from American Bureau of Shipping (ABS), ABS Plaza, 16855 4th Floor, New York, NY 10036, http://www.ansi.org.
Northchase Dr., Houston, TX 77060, http://www.eagle.org. Available from U.S. Government Printing Office, Superintendent of
Available from Institute of Electrical and Electronics Engineers, Inc. (IEEE), Documents, 732 N. Capitol St., NW, Washington, DC 20401-0001, http://
445 Hoes Ln., Piscataway, NJ 08854-4141, http://www.ieee.org. www.access.gpo.gov.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
F1338 − 91 (2019)
4. Significance and Use gasketed for the service intended, which is the efficient
conduction of air to the basic engine when it is installed in a
4.1 Comparison of brake horsepower developed and of
marine environment for main propulsion of a vessel.
specific fuel consumption rates from engine to engine may be
7.1.3 An engine-mounted exhaust manifold properly insu-
made by use of data based upon a standard for composition of
lated (including insulation by use of a water jacket application)
an engine assembly.
as may be required by laws and regulations discussed in 2.2
4.2 The purchaser of the engine assembly will be fully
herein [such as the requirements of USCG-115, paragraph
advised of the minimum scope of assembly which the pur-
56.50-1 (k), Parts 50–60, Title 46 CFR].
chaser may rightfully expect to be encompassed by a response
7.1.4 One or more engine-driven and engine-mounted scav-
to a request for quotation and to be delivered in response to a
enging air blowers, if required by engine design concept, or
purchase order unless the engine builder in the proposal or in
one or more single shaft assemblies of an exhaust gas-driven
the offer to sell has clearly advised otherwise.
turbine and combustion air blower, or both, if required by
4.3 It will be made apparent to the purchaser that additional
engine design concept, to provide a supply of air for scaveng-
auxiliary and accessory equipment will be needed to supple-
ing or supercharging, or both, and for basic combustion of the
ment the defined engine assembly when full consideration is
fuel.The single-shaft exhaust gas-driven turbochargers may be
given to the application of the engine assembly as a prime
engine mounted or separately mounted. The intended method
mover in a specific vessel.
of mounting of such turbochargers shall be clearly described to
theprospectivepurchaserbytheenginebuilderinanyresponse
5. Regulations, Conventions, and Standards
to an inquiry so that the impact on installation cost and
5.1 Specific—Theregulations,conventions,andstandardsto responsibility, if any, will be apparent. Turbocharger
which a commercial marine vessel may be subject in regard to
arrangements, for water-washing or other routine maintenance
the main propulsion prime movers will vary depending upon
procedures recommended by the engine builder, shall be
the flag of registry of the vessel.
provided.
7.1.5 An engineered arrangement of sufficient drilled and
5.2 General:
tapped holes, properly plugged during shipment, to allow
5.2.1 There may be regulations, conventions, and standards
measurement of combustion air and exhaust gas temperatures
and such applicable international treaties to which the country
and pressures at appropriate points in the engine assembly.
of registry may subscribe which shall be taken as forming a
partofthisguidetotheextentspecifiedhereinandtotheextent 7.1.6 One or more air cooler assemblies, if required by
engine design concept and power rating, designed to accept all
they shall be deemed applicable to the vessel by the country of
registry. of the air for combustion and scavenging and to cool such air
to appropriate temperatures as required by design of the basic
5.2.2 Typical examples applicable to vessels of the United
States ofAmerica registry are as follows: Institute of Electrical engine and by the predicted range of brake horsepower output
andconcurrentspecificfuelconsumptionraterange.Following
and Electronic Engineers Standard No. 45 (IEEE No. 45);
RulesoftheAmericanBureauofShipping;RulesoftheUnited the logic of 7.1.4, the air cooler assembly might be offered as
a remotely mounted device along with its associated turbo-
States Coast Guard as printed in various Part Numbers of Title
46 CFR of the United States of America and formerly chargers. If so, as in the case of the turbocharger, the intended
method of mounting shall be clearly described to the prospec-
commonly known as CG-115 (Marine Engineering
tive purchaser by the engine builder so the impact on installa-
Regulations, also known as Sub-Chapter F); and CG-259
tion cost and responsibilities, if any, will be apparent.
(Electrical Engineering Regulations, also known as Sub-
Chapter J).
7.1.6.1 Such cooler assemblies, commonly referred to as
intercoolers or aftercoolers, shall be arranged, if required by
6. Ordering Information
overallenginedesignandapplication,tolimitcoolingortoadd
heat energy to the charge of air for combustion to allow
6.1 Orders for machinery under this guide shall include the
operation of the engine at low continuous power ranges as
following:
indicated by the engine builder on a chart of the descriptive
6.1.1 ASTM designation, title, and date of this guide.
curves of performance of the engine (see 4.1 and 4.2).
6.1.2 Quantity, and
6.1.3 Packaging or packing and preservation requirements,
7.1.7 A jacket water-circulating pump and any other closed
or both. circuit fresh water pumps required for operation of the engine.
If this pump is not engine mounted and engine driven as
7. Minimum Scope of Assembly
parasitic load, the specific fuel rate for the engine on the
factory test stand shall be corrected logically and accurately to
7.1 Each engine assembly to meet this guide shall include
increase appropriately the specific fuel rate demonstrated on
the following:
the factory test stand and thereby to allow comparison to other
7.1.1 The basic power producing unit or engine, be it that
engines (see Section 8).
formed by an internal combustion reciprocating engine or by
an internal combustion rotary engine. 7.1.8 One or more pressure pumps for main engine lubri-
7.1.2 An engine-mounted intake manifold or manifolds to cating oil supply of each engine unit and, if required by design,
conduct air for combustion to the basic engine, with such for piston cooling service. If this pump(s) is not engine
manifold properly secured to the basic engine and properly mounted and engine driven as parasitic load, the specific fuel
F1338 − 91 (2019)
rate for the engine on the factory test stand shall be corrected 7.1.17.2 The engine builder shall provide an overspeed
logically and accurately to increase appropriately the specific automatic shutdown device or overspeed self-resetting device
separate and distinct from the governor of 7.1.17.1 and it shall
fuel rate demonstrated on the factory test stand and thereby to
be engine mounted.
allow comparison to other engines (see Section 8).
7.1.18 Start-Stop Controls:
7.1.9 Afull flow lubricating oil duplex discharge strainer or
7.1.18.1 The engine builder shall provide an engine-
filter for each engine unit to transmit all oil delivered to the
mounted system either for complete local control only of the
engine by the main lubricating oil pressure pump; or, if
engine or adaptable for local control and remote control from
required by engine design, lubricating oil supplied to the
the bridge or the engine room control console, or both. The
subordinateanddiscretesystemsoftheenginemaybesupplied
scope of the remote control features required by the purchaser
via an additional separate duplex lubricating oil strainer. Such
must be clearly presented to the engine builder in the purchase
strainers need not necessarily be supplied as engine mounted.
specification, and requirements of the therein identified cogni-
7.1.10 An integral, lubricating oil sump, suitable for opera-
zant regulatory bodies must be met by the engine builder.
tion of that engine when installed in a horizontal position but
7.1.18.2 If the main propulsion engine(s) are to be direct-
of a limited capacity with respect to total oil charge. Such a
reversible engines, the engine builder shall include the feature
sump may be provided with two or more openings which, if
of reversibility and the engine mounted controls to accomplish
left open for connection to a drain, will allow use of a remote
stopping and prompt reversing adjustment and restarting of the
oil sump of larger capacity as suggested by the engine builder.
engine in the opposite direction of rotation. Such controls may
7.1.11 A duplex suction strainer of mesh as recommended
be either for complete local control only, of the engine, or
by the engine builder to be located on the suction side of the
adaptable for local control and remote control from the bridge
main lubricating oil pressure pumps. Such a strainer need not
or the engine room console, or both. The scope of the remote
necessarily be engine mounted.
control features required in this case also must be clearly
7.1.12 A force feed cylinder or valve stem lubricator
presentedbythepurchasertotheenginebuilderinthepurchase
system, or both, if required by engine builder’s design, or by specification and requirements of the therein identified cogni-
the service intended, or both, or by main engine fuel intended, zant regulatory bodies must be met by the engine builder with
with both of the latter as stated by the purchaser. respect to components supplied by the engine builder.
7.1.18.3 All required engine-mounted components and pip-
7.1.13 Crankcase pressure relief valves or covers as recom-
ing for compressed control air and starting air or hydraulic oil
mended by the engine builder to meet standards of cognizant
supplied shall be engine mounted by the engine builder
marine inspection and classification authority as identified by
including, but not necessarily limited to, a duplex filter with a
the purchaser.
line lubricator for air to the starting air distributor; pilot-
7.1.14 An engine-barring device which shall be power
operated main starting air valve; pilot air distribution lines; a
driven unless clearly identified to the purchaser by the engine
starting air-reducing valve, if required; and starting air mani-
builder as required to be operated by manual effort only.
folds or headers.All such piping shall be terminated at flanges
7.1.15 An engine-mounted flywheel secured to the drive
or other fitting in a workmanlike manner for connection to
end of the crankshaft complete and sufficient to carry timing
ship’s lines by others.
marks. If required by drive system arrangement to the reduc-
7.1.19 Fuel Oil System:
tion gear (or to the propeller shafting if no reduction gear is to
7.1.19.1 Anengine-mounted,engine-driven,fueloilbooster
beused),theflywheelshallbecompleteandsufficienttoaccept
pump (service pump) shall be provided, if required, by the
mounting of the adjacent flange or coupling component. The
engine builder’s design; however, such a pump may be motor
machining of the flywheel to accept the adjacent flange or
driven for this class of engine and not integral with the engine
coupling component is part of an engine assembly. The
assemblyasshipped.Itis,however,tobeanitemfurnishedand
associated set of bolts required shall not be part of an engine
to be treated as a parasitic load.
assembly.
7.1.19.2 Aduplex final fuel filter or strainer, as specified by
7.1.16 Propeller Thrust Bearing—NO propeller thrust bear-
the engine builder, shall be supplied by the engine builder. If
ing shall be incorporated into the engine assembly for medium
engine mounted, it shall be properly protected for shipment so
speed main propulsion marine diesel engines except as a result
that the engine-mounted fuel distribution piping is maintained
of a specific contractual requirement placed on the engine
in a thoroughly clean condition during shipment and installa-
builder as a result of negotiation with the purchaser.
tion of the engine.
7.1.17 Governors:
7.1.20 Engine-Mounted Piping—All required engine-
7.1.17.1 The engine builder shall provide the primary en-
mountedpipingforjacketwater,rawwater,lubricatingoil,fuel
gine speed governor. The actuator portion of the governor with oil, starting air, control air or hydraulic oil, or a combination
its power unit and the speed-sensing portion shall be engine thereof, for controls shall be terminated in a workmanlike
mounted. Nothing in the specification is intended to prevent manner in a flange or other connection arrangement on the
off-engine location of electro/electronic portions, if any, of the engine assembly, and all nonstandard companion flanges or
other fittings shall be included by the engine builder.
governor system. The required functions or other
characteristics,orboth,ofthegovernorshallbespecifiedtothe
7.1.21 All special tools not readily obtainable by an owner
engine builder by the purchaser. of a vessel but required for day-to-day maintenance efforts
F1338 − 91 (2019)
shall be included with the engine assembly as shipped. The responsibilities, it should be a matter of negotiation and mutual
engine builder shall provide a fully descriptive list of such agreement between the purchaser and the engine builder and
special tools as part of a response to any request for a proposal should be an item in the contract to purchase.
for the machinery.
8. Treatment of Parasitic Loads
7.1.22 Spares—No spares are required as part of an engine
assembly. However, governmental agencies, the purchaser, the
8.1 General—Arecognizedandacceptedbasis,byreference
cognizant classification society, and the engine builder all have
to which a comparison of performance test results may be
either authority or interest to see that an appropriate set of
made, is necessary. The heart of such basis of comparison is
spares is provided on board the vessel before final approval to
consistent and accurate treatment of the parasitic loads of those
operate is given.
items of power consuming auxiliary apparatus which are
7.1.23 Instrumentation:
defined in Section 6 to be part of an engine assembly. In
7.1.23.1 Engine-mounted instrumentation for local observa- summary, such items are:
tion.Asetofengine-mountedinstrumentsforlocalobservation 8.1.1 Scavenging air blowers,
shallbeprovidedtomeetregulatorybodyrequirementsandthe 8.1.2 Lubricating oil circulation pumps,
requirements of the purchaser. Also, a tachometer drive ar- 8.1.3 Jacket water-circulating pumps,
rangement shall be provided as well as arrangements to allow 8.1.4 Fuel oil service (booster) pumps, and
measurement of cylinder pressures using a portable pressure 8.1.5 Engine governor system: component(s) to actuate fuel
measuring device, but not including such device. rack controls.
7.1.23.2 Engine-mounted sensors for remote readout sys-
8.2 If any of the above are required to allow the engine
temsarenotpartoftheengineassembly.However,aspecialset
assembly to operate and are not engine driven during such
of instrument wells or drilled, tapped, and plugged openings
factory tests as are carried out to verify engine brake horse-
may be required on the engine-mounted piping and compo-
power and engine specific fuel consumption data, then
nents to accommodate remote reading instruments, and such
appropriate, logical, consistent, and accurate treatment is
requirements should be developed separately by discussion
necessary to allow comparison of performance data from
between the purchaser and the engine builder.
engine to engine.
7.1.24 Cylinder Pressure Relief Valves—Such valves are
8.2.1 The formula or technique for such correction shall be
usually
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