1、UL 1129ISBN 0-7629-0459-3Wet Exhaust Components forMarine EnginesUnderwriters Laboratories Inc. (UL)333 Pfingsten RoadNorthbrook, IL 60062-2096Wet Exhaust Components for Marine Engines, UL 1129Third Edition, Dated September 1, 1999The master for this Standard at ULs Northbrook Office is the official
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16、rements in this Standard are now in effect, except for those paragraphs, sections, tables, figures,and/or other elements of the Standard having future effective dates as indicated in the note following theaffected item. The prior text for requirements that have been revised and that have a future ef
17、fective dateare located after the Standard, and are preceded by a SUPERSEDED REQUIREMENTS notice.New product submittals made prior to a specified future effective date will be judged under all of therequirements in this Standard including those requirements with a specified future effective date, un
18、lessthe applicant specifically requests that the product be judged under the current requirements. However, ifthe applicant elects this option, it should be noted that compliance with all the requirements in thisStandard will be required as a condition of continued Listing and Follow-Up Services aft
19、er the effectivedate, and understanding of this should be signified in writing.Copyright 1999 Underwriters Laboratories Inc.This Standard consists of pages dated as shown in the following checklist:Page Date1-12September 1, 1999SEPTEMBER 1, 1999 UL 1129tr2SEPTEMBER 1, 19991UL 1129Standard for Wet Ex
20、haust Components for Marine EnginesFirst Edition August, 1976Second Edition March, 1988Third EditionSeptember 1, 1999An effective date included as a note immediately following certain requirementsis one established by Underwriters Laboratories Inc.Revisions of this Standard will be made by issuing r
21、evised or additional pagesbearing their date of issue. A UL Standard is current only if it incorporates themost recently adopted revisions, all of which are itemized on the transmittal noticethat accompanies the latest set of revised requirements.ISBN 0-7629-0459-3COPYRIGHT 1976, 1999 UNDERWRITERS L
22、ABORATORIES INC.SEPTEMBER 1, 1999WET EXHAUST COMPONENTS FOR MARINE ENGINES - UL 11292No Text on This PageCONTENTSFOREWORD 4INTRODUCTION1 Scope .52 Glossary .53 General 53.1 Units of measurement .53.2 Components .5CONSTRUCTION4 General 6PERFORMANCE5 Vibration Test 66 Shock Test .77 Bending Test .88 S
23、tatic Pressure Test .88.1 Strength test .88.2 Leakage test .99 Chemical Resistance Test .910 Operation Temperature Test .10MANUFACTURING AND PRODUCTION TESTS11 Leakage Test 12MARKING12 General 12SEPTEMBER 1, 1999 WET EXHAUST COMPONENTS FOR MARINE ENGINES - UL 1129 3FOREWORDA. This Standard contains
24、basic requirements for products covered by Underwriters Laboratories Inc. (UL)under its Follow-Up Service for this category within the limitations given below and in the Scope sectionof this Standard. These requirements are based upon sound engineering principles, research, records oftests and field
25、 experience, and an appreciation of the problems of manufacture, installation, and usederived from consultation with and information obtained from manufacturers, users, inspection authorities,and others having specialized experience. They are subject to revision as further experience andinvestigatio
26、n may show is necessary or desirable.B. The observance of the requirements of this Standard by a manufacturer is one of the conditions of thecontinued coverage of the manufacturers product.C. A product which complies with the text of this Standard will not necessarily be judged to comply withthe Sta
27、ndard if, when examined and tested, it is found to have other features which impair the level ofsafety contemplated by these requirements.D. A product employing materials or having forms of construction which conflict with specific requirementsof the Standard cannot be judged to comply with the Stan
28、dard. A product employing materials or havingforms of construction not addressed by this Standard may be examined and tested according to the intentof the requirements and, if found to meet the intent of this Standard, may be judged to comply with theStandard.E. UL, in performing its functions in ac
29、cordance with its objectives, does not assume or undertake todischarge any responsibility of the manufacturer or any other party. The opinions and findings of ULrepresent its professional judgment given with due consideration to the necessary limitations of practicaloperation and state of the art at
30、 the time the Standard is processed. UL shall not be responsible to anyonefor the use of or reliance upon this Standard by anyone. UL shall not incur any obligation or liability fordamages, including consequential damages, arising out of or in connection with the use, interpretation of,or reliance u
31、pon this Standard.F. Many tests required by the Standards of UL are inherently hazardous and adequate safeguards forpersonnel and property shall be employed in conducting such tests.SEPTEMBER 1, 1999WET EXHAUST COMPONENTS FOR MARINE ENGINES - UL 11294INTRODUCTION1 Scope1.1 These requirements cover m
32、arine engine wet exhaust systems and components from the connectionto the engine exhaust manifold to the hull discharge fitting.1.2 The components covered by these requirements are intended for installation in accordance with theapplicable requirements of the Standard for Fire Protection Pleasure an
33、d Commercial Motor Craft, NFPA302.1.3 A product that contains features, characteristics, components, materials, or systems new or differentfrom those covered by the requirements in this standard, and that involves a risk of fire, electric shock, orinjury to persons shall be evaluated using the appro
34、priate additional component and end-productrequirements to determine that the level of safety as originally anticipated by the intent of this standard ismaintained. A product whose features, characteristics, components, materials, or systems conflict withspecific requirements or provisions of this s
35、tandard shall not be judged to comply with this standard.Where appropriate, revision of requirements shall be proposed and adopted in conformance with themethods employed for development, revision, and implementation of this standard.2 Glossary2.1 For the purpose of this standard, the following defi
36、nitions apply.2.2 EXHAUST SYSTEM A means by which hot exhaust gases, discharged from an engine, areconducted to an outboard terminus and released to the atmosphere.2.3 FLEXIBLE SECTION A limber portion of an exhaust system installed to reduce the transmissionof engine vibration and motion and to per
37、mit thermal expansion of the system.2.4 SILENCER (MUFFLER) A baffled chamber installed in an exhaust system for the purpose ofnoise attenuation.2.5 WET EXHAUST A system, or any portion thereof, that is cooled by water either injected directlyinto that part of the system through which the exhaust gas
38、es flow or circulated through a water-jacketedsection that serves to isolate the cooling water from the exhaust-gas passage.3 General3.1 Units of measurement3.1.1 If a value for measurement is followed by a value in other units in parentheses, the second valuemay be only approximate. The first state
39、d value is the requirement.3.2 Components3.2.1 Except as indicated in 3.2.2, a component of a product covered by this standard shall comply withthe requirements for that component.SEPTEMBER 1, 1999 WET EXHAUST COMPONENTS FOR MARINE ENGINES - UL 1129 53.2.2 A component need not comply with a specific
40、 requirement that:a) Involves a feature or characteristic not needed in the application of the component in theproduct covered by this standard, orb) Is superseded by a requirement in this standard.3.2.3 A component shall be used in accordance with its recognized rating established for the intendedc
41、onditions of use.3.2.4 Specific components are recognized as being incomplete in construction features or restricted inperformance capabilities. Such components are intended for use only under limited conditions, such ascertain temperatures not exceeding specified limits, and shall be used only unde
42、r those specific conditionsfor which they have been recognized.CONSTRUCTION4 General4.1 A material used for the fabrication of an exhaust system or component shall have the strength andrigidity necessary to withstand the temperatures, pressures, stresses, and corrosive conditions that maybe imposed
43、on the system in service without leakage, separation of plies, cracking, or other deterioration.4.2 Combinations of metal and metal alloys shall be galvanically compatible.4.3 A silencer or water-jacketed component shall have acceptable drain provisions. A drain plug of atleast 1/8 inch pipe size sh
44、all be provided for this purpose.Exception: A component need not be provided with a drain plug if it cannot accumulate a sufficientamount of water to be subject to a risk of structural damage if the water freezes.4.4 An exhaust component shall be free of rough or sharp edges that may constitute a ri
45、sk of injury topersons installing or servicing it or servicing nearby equipment.PERFORMANCE5 Vibration Test5.1 An exhaust component shall withstand, without separation of plies, cracking, or other materialdeterioration, vibration for 24 hours in accordance with 5.5.5.2 A sample of a component intend
46、ed for direct connection to a pipe fitting or flange at the engine or arigid fitting at the hull is to be secured directly to a rigid coupling on the vibration table test fixture. Thesample is to be in the intended operating position, with the free end coupled to a second fixture that is offthe tabl
47、e by means of marine exhaust hose having a minimum of 3 plies of cloth reinforcing and 1 ply ofsteel reinforcing. The flexible hose coupling is to be 4 feet (1.2 m) long. See Figure 5.1.This is generated text for figtxt.5.3 A sample of flexible exhaust hose is to be secured to an acceptable serrated
48、 hose coupling mountedon the vibration table test fixture, with the free end of the hose secured to a second hose coupling on aseparate fixture that is off the table. The rigid test fixture then is to be positioned so that the sample isbent to a 45 degree angle at the minimum radius specified by the
49、 manufacturer.SEPTEMBER 1, 1999WET EXHAUST COMPONENTS FOR MARINE ENGINES - UL 112965.4 A sample of a component intended to be independently supported between the engine and hulldischarge (for example, a muffler or rigid exhaust tubing) is to be supported on the vibration table in amanner simulating a normal installation and is to be connected at both ends to rigid fixtures with a 4-foot(1.2-m) length of marine exhaust hose. See Figure 5.2.This is generated text for figtxt.5.5 The sample is to be subjected to a variable frequency vibration in each of three rectil
