IS 15324: Shipbuilding - Selection and Testing of Air Starting Systems - Code of Practice

11 Pages·2003·1.1 MB·English

by  Bureau of Indian Standards

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IS 15324 (2003): Shipbuilding - Selection and Testing of
Air Starting Systems - Code of Practice [TED 19: Marine
Engineering and Safety Aids]
“!ान $ एक न’ भारत का +नम-ण”
Satyanarayan Gangaram Pitroda
““IInnvveenntt aa NNeeww IInnddiiaa UUssiinngg KKnnoowwlleeddggee””
“!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता हहहहै””ै”
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“Knowledge is such a treasure which cannot be stolen”

IS 15324:2003
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Indian Standard
SHIPBUILDING— SELECTION AND TESTING OF AIR
STARTING SYSTEMS — CODE OF PRACTICE
ICS 47.020.20

0 BIS2003
BUREAU OF INDIAN STANDARDS
MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG
NEW DELHI 110002
June 2003 Price Group 3
Marine Engineering and Safety Aids Sectional Committee, TED 19
FOREWORD
This Indian Standard was adopted by the Bureau of Indian Standards, after the draft finalized by the Marine
Engineering and Safety Aids Sectional Committee had been approved by the Transport Engineering Division
Council.
A ship is required to be provided with the equipment for starting the main and auxiliary engines so that the
necessary initialchargeofstarting airorinitialelectricpower canbedeveloped onboard shipwithout external aid.
This standard covers the requirements for equipment using airstarting systems.
Whilepreparing this standard, following have been taken intoconsideration:
a) The capacity ofthe air compressors isnormally related tothe capacity of the air receivers.
b) Safety requirements laid down by the classification societies for the entire air starting system have been
taken into account.
c) Efforts have been made by giving all the requirements pertaining to selection and testing of air starting
systems inorder to facilitate small shipyards to speci~ the scope of supply to various suppliers.
The composition ofthe Committee responsible for formulation ofthis standard isgiven inAnnex A.
Forthe purpose of deciding whether a particular requirement of this standard iscomplied with, the final value,
observed or calculated, expressing the result of a test or analysis, shall be rounded off in accordance with
IS2:1960 ‘Rules for rounding off numerical values (revised)’. The number of significant places retained inthe
rounded off value should bethe same asthat ofthe specified vahre inthis standard.
IS 15324:2003
Indian Standard
SHIPBUILDING— SELECTION AND TESTING OF AIR
STARTING SYSTEMS — CODE OF PRACTICE
1 SCOPE 3.2 Purchaser— The party purchasing the machines
and equipments. Theterm ‘purchaser’ shall also cover
This standard coversselectionandtesting offollowing
a person or persons authorized in writing by the
itemsonboardofashipusingcompressedairforengine
purchaser to act on his behalf for inspection of the
starting:
machines.
a) Air receivers,
3.3 Manufacturer— The party manufacturing the
b) Air compressors, and
machines and equipments. The manufacturer may or
c) Pipes and fittings. may notbethe supplier.
2 REFERENCES 4 AIR RECEIVERS
The following standards contain provisions which 4.1 General
through reference inthis text, constitute provisions of .
4.1.1 On ships, at least two air receivers shall be
this standard. At the time of publication, the editions
provided approximately each of equal capacity, for
indicated were valid. All standards are subject to
starting ofengines.
revision and parties to agreements based on this
standard are encouraged to investigate the possibility
4.1.2 Air receivers, intended for starting of engines
of applying the most recent editions of the standard may also be used for auxiliary services provided
indicated below:
sufficient additional capacity for this purpose is
available.
1SNo. Title
4.1.3 Thedesign, manufacture, marking andtesting of
1239 Mild steeltubes, tubulars andother
the airreceivers shall be inaccordance with IS 2825.
wrought steel fittings:
(Part 1): 1990 Mild steeltubes (j2j?hrevision) 4.1.4 In installations, where the main engine clutches
are pneumatically operated, separate air receiver for
(Part 2): 1992 Mild steel tubulars and other
this purpose shall beprovided.
wrought steel pipe fittings ~ourth
revision) 4.2 Total Capacity

2825:1969 Code for unfired pressure vessels 4.2.1 The combined capacity of the air receivers

4310: 967 Weldable steel pipe fittings for intended for starting of reversible engines shall be so
marine purposes determined that itissufficient to carry out 12starting
manoeuvres andmay beapproximated bythe formula
4693: 968 Specification for steel accessories
givenbelowandbasedupontheassumption that initial
for marine piping systems
and final pressures in the air receiver would be
5727: 981 Glossary of terms relating to 30kg/cm2and 9kg/cm2respectively.
compressors and exhausters (first
~
revision) J
J.a X3~ X[(Z+b XPm~XnA)+0.9]. V~Xcxd
11323:1984 Specification for steel gate valves D
foruseinmarine pipework system
where
3 TERMINOLOGY J. total capacity of airreceivers;
D.
For the purpose of this standard the following bore diameter ofthe main engine, incm;
definitions inaddition tothose given inIS5727 shall /./. stroke ofthe main engine, incm;
apply.
Vh= swept volume of one cylinder ofthe main
3.1 Supplier—The party supplying themachines and engine, in litres;
equipments. Thesupplier mayormaynotbetheactual z . number of cylinders ofmain engine;
manufacturer ofthemachines. Theterm ‘supplier’shall
also cover anyparty with whom the supplier placesan P=me mean effective pressure ofmain engine, in
kg/cm2;
order for partial compliance.
IS 15324:2003
u= 0.771 fortwo stroke engines; 5.2 Capacity
—— 0.685 for four stroke engines;
5.2.1 The airquantity, Qin l/h, airdelivered byallthe
b= 0.058 for two stroke engines; compressors and related to intake conditions shall not
—. 0.055 for four stroke engines; be lessthan:
c= 1.0forsinglescrewinstallationswithengine
coupled directly tothe shafting; Q=l.7J(p-9)
—— 1.5for single screw installations with two
where
equallysizedenginescoupledtotheshafting
through detachable couplings; J = total capacity of air receivers, inlitreand
—— 2.0 for twin-screw installations with each calculated inaccordance with 4.2; and
line of shafting having a directly coupled
engine; P = maximum working pressure inthe starting
airreceivers, inkg/cm2.
—— 2.0 for twin-screw installations with two
equally sized engines connected to a 5.2.2 Where main engine driven air compressor is
reduction gear box through detachable provided, its capacity shall not exceed 50 percent of
couplings; the capacity stipulated in5.2.1.
d = 1.0whenp =30kg/cm2 5.3 Design
Ifp islessthan 30kg/cm2,then
5.3.1 The compressor manufacturer shall certi~ that
0.05s4 the design and materials of the air compressor are
d= suitable formarine use,that is,designed to operate in
l+@ II-0.0hsd.p,”:
various conditions of trim, heel, vibrations, marine
P= maximum working pressure ofairreceiver, atmosphere, etc, in accordance with the rules of the
inkg/cm2; classification societies.
e= Euler’s number (2.718); 5.3.2 Grey cast iron shall not be employed in the
nA = 0.06n0 + 14,when nOS 1000; construction of crankshaft and connecting rods of air
compressors of reciprocating type.
nA = 0.25n0 – 176, when nO>1 000; and
5.3.3 Cooler dimension shall be based on aseawater
n,,[Min-’] = rated speed.
temperature of at least 32°C in case of water cooling
4.2.2 For installations with reversing gears or and an air temperature of at least 45°C in case of air
controllable pitch propellers, the starting air capacity cooled compressors. Where fresh water cooling isto
maybereduced to0.5ofthecapacity required by4.2.1 beproposed, thefreshwater inlettemperature shallnot
but not lessthan necessary for 6 manoeuvres. exceed 40”C.

4.2.3 Separate air capacity fo r auxiliary engines 5.3.4 Cooler water spaces of the compressors and

exceeding that required for main en gines need to be coolersshallbeprovided withsafetyvalvesorbursting
provided. However, starting air capacity may be discs so that ample relief is provided in the event of
approximated bytheformula given in4.2.1 exceptthat rupture of atube.
value ofcmay bechanged t~asunder:
5.3.5 Compressors shall be so designed that the
c = 0.30 for one auxiliary engine.
discharge air temperature from the compressor does
= 0.45 fortwo auxiliary engines.
not exceed 93”C. A small fusible plug or an alarm
= 0.60 for three auxiliary engines.
operatingat121“Cshallbeprovided onthecompressor
= 0.75 for four auxiliary engines. dischargetogivewarning ofexcessiveairtemperature.
5 COMPRESSORS 5.3.6 High-pressure stage air coolers shall not be
locatedinthecompressorjacket cooling water spaces.
5.1 General
5.3.7 Each compressor stage shallbe provided with a
5.1.1 At leasttwo aircompressors, oneofwhich shall
suitablesafetyvalvewhichcannotbeisolatedandshall
beindependent ofthemain engines, shallbeprovided
becapable ofpreventing the pressure being exceeded
on each ship for changing the air receivers within lh
by more than 10percent even if the discharge valve
fromatmospheric pressuretothepressuresufficientfor
from thecompressor isclosed.
required number of starts.
5.3.8 Each compressor stage shall be fitted with a
5.1.2 Independentaircompressors,onshipswithengine
pressuregauge.Themaximum permissible pressure for
power less than 150kW, may be manually operated
thestageshallbe indicated onthe pressure gauge with
and connected to acorrespondingly small capacity air
redmarking .
receiver.

2
IS 15324:2003
5.3.9 Where one compressor stageconsists ofseveral manufacturer’s instructions. The direction of rotation
cylinders, eachofwhich canbeshutoff, eachcylinder shall becorrect.
shal1beprovidedwithonesafetyvalveandonepressure
The compressor shall run at full load for 2h and the
gauge.
following shallberecorded:
5.3.10 Thermometers shallbefittedtoeachstageoutlet
a) Motor input,
oncompressors having apowerconsumption of20kW
b) Inlet airpressure andtemperature,
andabove. Thethermometers shallbemarked withthe
maximum permissible temperature. c) Discharge airpressure and temperature,
d) Lubricantoil,quantity,pressureandtemperature,
5.3.11 Allcompressorsshallbefittedwithoilandwater
traps andafter cooler behind the final stage. e) Cooling water or air pressure and temperature,
and
5.3.12 Water traps, after coolers and air receiver
betweenthestagesshallbeprovided withdrainsattheir f) Motor temperature rise.
lowestpoints.
5.6 Shop Trials
5.4 Name Plate
5.6.1 Cylinder, cylinder heads andcylinder liner shall
5.4.1 Eachcompressor shaIIbefittedwithanamepIate be hydrostatically tested to 1.5 times the final
containing the following information: compression ofthe stage inquestion.
a) Indication of source ofmanufacture, 5.6.2 The compressed air containing chambers of the
b) Month and year of manufacture, intermediateandaftercoolemoftheaircompressor shall
be hydrostatically tested to 1.5 times the final
c) FAD of compressor,
compression ofthe stage inquestion.
d) Maximum discharge pressure,
5.6.3 Arunning test ofat least 8hshall be carried out
e) Number of revolution per minute,
toprove the following:
f) Power consumption, and
a) Capacity,
g) Number of stages.
b) Power consumption,
5.5 Production Test
c) Satisfactory operation, and
The production test isto consist of pre-test procedure d) Operation of instruments and alarms.
and preliminary tests.
During the running test, all the parameters are to be
5.5.1 Pre- Test Procedures checkedJrecorded.
5.5.1.1 Determination ofphysical data 5.6.4 After the test, moving parts of the compressor
a) Weight of compressor unit c omplete, wet and shallbeexamined.

dry; and
6 PIPES AND FITTINGS
b) Dimensional survey (overall dimensions).
6.1 General
5.5.1.2 Hydrostatic test
6.1.1 Thepipes,fittings andaccessories shallconform
5.5.1.3 Flushing toIS 1239(Part 1),IS 1239(Part 2), IS4310, IS4693
and IS 11323.
The compressor unit to be flushed with hot oil after
partial final assembly.
6.1.2 Castironshallnotbeused inthe manufacture of
compressed airpiping and fittings.
5.5.1.4 Instrument calibration
6.1.3 Screwed connections (ermeto or keelaring
Test instruments are to be checked against standards.
Thecompressor gaugepanelinstrumentstobechecked coupling) can beused inthe piping.
against test instruments.
6.2 Finish
5.5.1.5 Electrical equipment
Allpipes,fittingsand accessoriesfabricated from mild
Afunctional testis tobecarried outonswitchgear and steel shall be cleaned by pickling, blowing by
protectionpanelincluding lubricantoil,airtemperature compressed airand painted from outside.
and motor overheat trips.
6.3 Testing
5.5.2 Preliminary Tests
After fabrication, the piping shall be hydrostatically
The compressor shall run in accordance with the tested to 1.5timesthe design pressure.

3
IS 15324:2003
ANNEX A
(Foreword)
COMMITTEE COMPOSITION
Marine Engineering and SafetyAids Sectional Committee, TED 19
Organization Representative(s)
D.G. Shipping, Mumbai SIRIB. K. BISWAS(Chairman)
SW A. CHATARIEE(Alternate)
Alcock Ashdown &Co Ltd, Bhavnagar S}OOP. MrrRA
SHIUK.J. ROY(Mernate)
Bureau Veritas, Mumbai Smr P.B. WARRIER
Central Institute of Fisheries Technology, Cochin DRT. K. SWASAD
Sw K. L.RAMAKRISHANA(N,4/fernate)
Cochin Shipyard Ltd, Cochin StIRIMATHEWGEORGE
SHFUK.K. S.NAMBIAR(Alternafe)
Essar Shipping Ltd, Mumbai SmuV. SRIMVASAN
Greaves Cotton &Co Ltd, Mumbai CAPTS. SOOTA
StmuH.L.SHAH(Alternate)
Garden Reach Shipbuilders & Engineers Ltd, Kolkata Swu S.MAJI
.
Goa Shipyard Ltd, Goa StmrrRAGWEERSJNGH
SHSUV. DASGOPTA(Alternate)
Great Eastern Shipping, Mumbai SNiuARUNSHARMA
Hindustan Shipyard Ltd, Visakhapatnam SHIUA.SESHAGUURAO
SHRIS.LAKSHMINASAYAN(AAlternate)
Institute ofMarine Engineers, Mumbai Stuu A. R.@TNSN
CDRJASBIRSINGH(Alternate 1)
SHFOK. R. SACHAR(Alternate II)
Institute of Marine Technologists, Mumbai SIIRIDONDYER
SHRID. B. lRANL(A1/ernate)
Indian Register of Shipping, Mombai SHRI1.N. BOSE
SHIUU.S.KALGHATG(LAlternate)
Kirloskar Oil Engines, Pune SHRIS.C. SARDESAi
SHIUP. S. BHAVE(Alternate)
Kolkata Port Trust, Kolkata SIIRIS.ROY
SHRIG. SEN(A/ternate)
Lloyd’s Register of Shipping, Mumbai SHRIT. K. MITRA
SHRtS.C. SABHARWA(LAlfernate 1)
SNRIJ. D.GROVER(Alternate H)

Ministry ofCommunication, New Delhi DR.ASHOKCHANDRA
SHRiV.V. SINGH(Alfernate)
Mazagon Dock Ltd, Mumbai SHRLS. K. MURTHV
SifruA. H. SoI.Aiw(Alternate)
Ministry of Defence, Directorate of Marine Engineers, New Delhi CDRA. P.V.THAMPAN
A:WSTAIJTDIRECTOR(SYSTEMW) (Akerrrufe)
Ministry ofDefence, Directorate of Standardization, New Delhi CAPTP.R. SANGLIKAR
SHRIA. R. C. VA!JMA(Alternate)
Mather &Platt (India) Ltd, Mumbai Stuu D.R. BAPAT
SHRIK.BASHWARAN(Alternate)
Mumbai Port Trust, Mumbai SHRIR. K. KHATTAR
Smu S.P. DEOKOUAR(Alternate)
Ministry of Surface Transport (Development Wing), New Delhi SHRIG. P.ROY
SHP.IT, K. DOTTA(A[fertrate)
Ministry of Surface Transport (SBR), New Delhi DEVELOPMENATDVISOR(SBR)
SHRSR. K. SEN(Alternate)
Nitin Fire Production System Ltd, Mumbai SHRIB. R.MALLYA
National Ship Design and Research Centre, Visakhapatnam DIRECTOR
B.E. Pumps, Kolkata SHRICHANOANDASSGUPTA
Shaparia Dock &Steel Co Pvt Ltd, Mumbai SHRIC. N. MISTRY
Swastic Rubber Prodocts, Pune GENERALMANAGER
The Company of Master Mariners oflndi~ Mumbai CAPTV.N. AINOLEY
The Indian National Shipowners Association, Mumbai SHRIM. M. PiPLANI
(Continued onpage 5)

4
IS 15324:2003
(Co.tinuedfrompage 4 )
Organization Representative(s)
The Shipping Corporation of India, Mumbai SturrS, K. BHALLA
Smu B.N. AOVANl(Alternate)
Varun Shipping, Mumbai SHIUB. L. MEHTA
Vijay Fire Protection Systems Pvt Ltd, Mumbai SHIUJATINOERAR. SALOT
SHFOHARISHR. SALOT(Alternate)
BIS Directorate General SHiUA. R. GULATI,Director &Head (TED)
[Representing Director General (Ex-oficio)]
Member Secretary
StuuV. ARUMUCAM
Joint Director (TED), BIS

5