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1、INTERNATIONAL ASSOCIATION OF CLASSIFICATION SOCIETIES Requirements concerning MACHINERY INSTALLATIONS IACS Req. 2006 Contents, Page 1 CONTENTS M1 Cylinder overpressure monitoring of i.c. enginesDeleted M2 Alarm devices of internal combustion engines1971 M3 Speed governor and overspeed protective dev
2、ice Rev.5 Feb 2006 M4 Deleted M5 Mass production of internal combustion engines: procedure for inspectionRev. 1 1987 M6 Test pressures for parts of internal combustion engines 1)Rev. 3 May 1998 M7 Re-categorized as “Recommendation” No. 26 M8 Re-categorized as “Recommendation” No. 27 M9 Crankcase exp
3、losion relief valves for crankcases of internal combustion enginesCorr.1 Nov 2005 M10 Protection of internal combustion engines against crankcase explosionsCorr.1 Nov 2005 M11 Protective devices for starting air mains1972 M12 Fire extinguishing systems for scavenge manifolds1972 M13 Re-categorized a
4、s “Recommendation” No. 28 M14 Mass production of internal combustion engines: definition of mass production1973 M15 Re-categorized as “Recommendation” No. 29 M16 Devices for emergency operation of propulsion steam turbinesRev.1 Jan 2005 M17 Deleted 1 July 1998 M18 Parts of internal combustion engine
5、s for which material tests are requiredRev. 42000 M19 Parts of internal combustion engines for which nondestructive tests are required1974 M20 Deleted Nov 2001 M21 Mass production of internal combustion engines: type test conditions 1974/Corr. Sept 2003 M23 Mass production of engines: mass produced
6、exhaust driven turboblowersRev. 31991 M24 Requirements concerning use of crude oil or slops as fuel for tanker boilersRev. 11976 M25 Astern power for main propulsionRev. 3 July 2003 M26 Safety devices of steam turbinesCorr.1 Feb 2005 M27 Bilge level alarms for unattended machinery spaces1976 M28 Amb
7、ient reference conditions1978 M29Alarm systems for vessels with periodically unattended machinary spacesRev. 31997 M30Safety systems for vessels with periodically unattended machinery spacesRev. 11997 IACS Req. 1991/Rev. 2006 Contents, Page 2 M31 Continuity of electrical power supply for vessels wit
8、h periodically unattended 1978 machinery spaces M32 Definition of diesel engine type1979 M33 Scantlings of intermediate shaftsDeleted Feb 2005 M34 Scantlings of coupling flanges1980 M35 Alarms, remote indications and safeguards for main reciprocating internal combustion engines Rev. 4 1999 installed
9、 in unattended machinery spaces M36 Alarms and safeguards for auxiliary reciprocating internal combustion engines Rev. 2 June 2000 driving generators in unattended machinery spaces M37 Scantlings of propeller shaftsDeleted Feb 2005 M38 k-factors for different shaft design features (intermediate shaf
10、ts)- see M33Deleted Feb 2005 M39 k-factors for different shaft design features (propeller shafts)- see M37Deleted Feb 2005 M40 Ambient conditions Temperatures1981 M41 Superseded by UR E10 (1991) M42 Steering gearRev. 31997 M43 Bridge control of propulsion machinery for unattended machinery spaces198
11、2 M44 Documents for the approval of diesel enginesRev.7 May 2004 M45 Ventilation of engine roomsRev.11987 M46 Ambient conditions InclinationsRev.1 June2002 M47 Bridge control of propulsion machinery for attended machinery spaces1983 M48 Permissible limits of stresses due to torsional vibrations for
12、intermediate, Deleted Feb 2005 thrust and propeller shafts M49 Deleted Dec 2003 M50 Programme for type testing of nonmass produced I.C. engines Rev. 2 1991/Corr. Feb 1999 M51 Programme for trials of i.c. engines to assess operational capabilityRev.2 July 2003 M52 Length of aft stern bush bearing1986
13、 M53 Calculation of crankshafts for I.C. enginesRev.1 Dec 2004 M54 Deleted 1997 M55 Deleted May 2001 M56 Marine gears Load capacity of involute parallel axis spur and helical gears1990/Corr. 1996 M57 Use of Ammonia as a Refrigerant1993 M58 Charge Air Coolers1994 M59Control local control of the engin
14、es is always to be possible, as required by M43.10, and, to this purpose, from the local control position it is to be possible to disconnect the remote signal, bearing in mind that the speed control according to UR M3.1, subparagraph 1, is not available unless an additional separate governor is prov
15、ided for such local mode of control. In addition, electronic speed governors and their actuators are to be type tested according to UR E10. M1 (1969) (Rev. 1 1985) (Rev.2 April 1999) IACS Req. 1971/Rev. 5 2006 M1M3 M3 (1971) (Rev. 1 1984) (Rev. 2 1986) (Rev. 3 1990) (Rev. 4 June 2002) (Corr. Aug 200
16、3) (Rev.5 Feb 2006) M2 (1971) END END M3 NOTE: The rated power and corresponding rated speed are those for which classification of the installation has been requested. M3.2 Speed governor, overspeed protective and governing characteristics of generator prime movers 1. Prime movers for driving genera
17、tors of the main and emergency sources of electrical power are to be fitted with a speed governor which will prevent transient frequency variations in the electrical network in excess of 10% of the rated frequency with a recovery time to steady state conditions not exceeding 5 seconds, when the maxi
18、mum electrical step load is switched on or off. In the case when a step load equivalent to the rated output of a generator is switched off, a transient speed variation in excess of 10% of the rated speed may be acceptable, provided this does not cause the intervention of the overspeed device as requ
19、ired by 3.1.1 2. At all loads between no load and rated power the permanent speed variation should not be more than 5% of the rated speed. 3. Prime movers are to be selected in such a way that they will meet the load demand within the ships mains. Application of electrical load should be possible wi
20、th 2 load steps and must be such that prime movers running at no load can suddenly be loaded to 50% of the rated power of the generator followed by the remaining 50% after an interval sufficient to restore the speed to steady state. Steady state conditions should be achieved in not more than 5 secon
21、ds. Steady state conditions are those at which the envelope of speed variation does not exceed +1% of the declared speed at the new power. Application of electrical load in more than 2 load steps can only be permitted, if the conditions within the ships mains permit the use of such prime movers whic
22、h can only be loaded in more than 2 load steps (see Fig. 1) and provided that this is already allowed for in the designing stage. This is to be verified in the form of system specifications to be approved and to be demonstrated at ships trials. In this case, due consideration is to be given to the p
23、ower required for the electrical equipment to be automatically switched on after black-out and to the sequence in which it is connected. This applies analogously also for generators to be operated in parallel and where the power has to be transferred from one generator to another in the event of any
24、 one generator has to be switched off. 4. Emergency generator sets must satisfy the governor conditions as per items 1 and 2 even when: a) their total consumer load is applied suddenly, or b) their total consumer load is applied in steps, subject to: the total load is supplied within 45 seconds sinc
25、e power failure on the main switchboard the maximum step load is declared and demonstrated the power distribution system is designed such that the declared maximum step loading is not exceeded the compliance of time delays and loading sequence with the above is to be demonstrated at ships trials. th
26、eir total consumer load is applied suddenly. 5. In addition to the speed governor, each prime mover driving an electric generator and having a rated power of 220 kW and above must be fitted with a separate overspeed protective device so adjusted that the speed cannot exceed the rated speed by more t
27、han 15%. 6. For a.c. generating sets operating in parallel, the governing characteristics of the prime movers shall be such that within the limits of 20% and 100% total load the load on any generating set will not normally differ from its proportionate share of the total load by more than 15% of the
28、 rated power of the largest machine or 25% of the rated power of the individual machine in question, whichever is the less. For an a.c. generating set intended to operate in parallel, facilities are to be provided to adjust the governor sufficiently fine to permit an adjustment of load not exceeding
29、 5% of the rated load at normal frequency. NOTE: For guidance, the loading for 4-stroke diesel engines may be limited as given by Figure 1. M3 contd IACS Req. 1971/ Rev. 5 2006 M3M4 Deleted Limits of flash point of oil fuel are covered by F35 as revised and should be referred to. M3 contd M4 IACS Re
30、q. 1971/ Rev. 5 2006 100 90 80 70 60 50 40 30 20 10 0 681012141618202224 mep at rated power of diesel engine bar Load increase referred to rated power % limiting curve for 3rd load step limiting curve for 2nd load step limiting curve for 1st load step Fig. 1 Limiting curves for loading 4-stroke dies
31、el engines step by step from no-load to rated power as function of the brake mean effective pressure M5 Mass production of internal combustion engines, procedure for inspection M5.1Field of application The following procedure applies to the inspection of mass produced internal combustion engines hav
32、ing a bore not exceeding 300 mm. M5.2Procedure for approval of mass production M5.2.1 Request for approval - documents to be submitted Upon requesting approval for mass production of a type of internal combustion engine, the Manufacturer must submit all the necessary data concerning this type of eng
33、ine: drawings technical specification of the main parts operation and maintenance manuals list of subcontractors for the main parts. M5.2.2 Examination of the manufacturing processes and quality control procedures The Manufacturer will supply full information regarding the manufacturing processes an
34、d quality control procedures applied in the workshops. These processes and procedures will be thoroughly examined on the spot by the Surveyors. The examination will specially concern the following points: organisation of quality control systems recording of quality control operations qualification a
35、nd independence of personnel in charge of quality control. M5.2.3 Type test A running test of at least 100 hours duration will be carried out on an engine chosen in the production line. The programme of this test is examined specially for each case. At the end of the test, the main parts of the engi
36、ne will be disassembled and examined. Omission of the test for engines of well known type will be considered. M5.2.4 Validity of approval The Classification Society reserves the right to limit the duration of validity of the approval. The Classification Society must be kept informed, without delay,
37、of any change in the design of the engine, in the manufacturing or control processes or in the characteristics of the materials. M5.3Continuous review of production M5.l3.1 Access of Surveyors to the Workshops The Classification Society Surveyors must have free access to the Workshops and to the Con
38、trol Service premises and files. M5.3.2 Survey of production (a)Inspection and testing records are to be maintained to the satisfaction of the Surveyor. (b)The system for identification of parts is to be approved. (c)The Manufacturer must give full information about the quality control of the parts
39、supplied by subcontractors, for which approval may be required. IACS Req. 1987 M5 (1971) (Rev.1 1987) M MM M5 The Classification Society reserves the right to apply direct and individual inspection procedures for parts supplied by subcontractors when deemed necessary. M5.3.2 Individual bench test Th
40、e Classification Society may require that a bench test be made under supervision of the Surveyor. M5.4Compliance and inspection certificate For every engine liable to be installed on a ship classed by the Classification Society, the Manufacturer is to supply a statement certifying that the engine is
41、 identical to the one which underwent the tests specified in 5.2.3 and give the inspection and test result. This statement is to be made on a form agreed with the Classification Society. Each statement bears a number which is to appear on the engine. A copy of this statement is to be sent to the Cla
42、ssification Society. M5 contd IACS Req. 1987 M M M M6 Test pressures for parts of internal combustion engines 1) NOTES 1) In general, items are to be tested by hydraulic pressure as indicated in the Table. Where design or testing features may require modification of these test requirements, special
43、consideration will be given. 2) P is the maximum working pressure in the part concerned. 3) 1 bar = 0,1 MPa = 0,1 N/mm2. 4) For forged steel cylinder covers and forged steel piston crowns test methods other than pressure testing may be accepted. e.g. suitable non-destructive examination and dimensio
44、nal control properly recorded. 5) Charge air coolers need only be tested on the water side. M6 (1972) (Rev. 1 1985) (Rev. 2 1994) (Rev.3 May, 1998) IACS Req. 1985/Rev. 3 1998 No.ItemTest pressure 2) bar 3) 1.Cylinder cover, cooling space 4)7 2.Cylinder liner, over whole length of cooling space7 3.Cy
45、linder jacket, cooling space4 but not less than 1,5.P 4.Exhaust valve, cooling space4 but not less than 1,5.P 5.Piston crown, cooling space (where the cooling space is sealed7 by piston rod or by piston rod and skirt, test after assembly) 4) Fuel injection pump body,1,5 . P or P + 300 pressure sidew
46、hichever is the less 6.High pressure fuel injectionFuel injection valve1,5 .P or P + 300 systemwhichever is the less Fuel injection pipes1,5 . P or P + 300 whichever is the less Piping, Pumps, actuators, 7.Hydraulic Systemetc. for hydraulic drive of valves1,5 . P 8.Scavenge pump cylinder4 9.Turboblo
47、wer, cooling space4 but not less than 1,5 . P 10.Exhaust pipe, cooling space4 but not less than 1,5 . P 11.Engine driven air compressorAir side1,5 . P (cylinders, covers, intercoolers and aftercoolers)Water side4 but not less than 1,5 . P 12.Coolers, each side 5)4 but not less than 1,5 . P 13.Engine
48、 driven pumps (oil, water, fuel, bilge)4 but not less than 1,5 . P M M M7M9 Re-categorized as “recommendation” No. 26 Re-categorized as “recommendation” No. 27 Crankcase explosion relief valves for crankcases of internal combustion engines M9.1 Internal combustion engines having a cylinder bore of 2
49、00 mm and above or a crankcase volume of 0.6 m3and above shall be provided with crankcase explosion relief valves in accordance with UR M9.2 to UR M9.13 as follows: M9.1.1 Engines having a cylinder bore not exceeding 250 mm are to have at least one valve near each end, but, over eight crankthrows, an additional valve is to be fitted near the middle of the engine. M9.1.2 Engines having a cylinder bore exceeding 250 mm but not exceeding 300 mm are to have at least one valve in way of each alternate