ICOMIA Global Conformity Guideline for ISO and ABYC Standards. Guideline Number 8 Ventilation of fuel systems

Transcription

1 ICOMIA Global Conformity Guideline for ISO and ABYC Standards sponsored by ABYC, BMF, ICOMIA, IMCI, and NMMA Guideline Number 8 Ventilation of fuel systems 1. PURPOSE These documents were created by an international working group for use as a companion to the standards listed below. The creators of these documents assume the users familiarity with either the ABYC or ISO standards. 2. SCOPE The information is presented in two separate yet similar Annexes. The annexes provide additional requirements in order to assess conformity to a parallel standard from another standard system. Access to the parallel standard is required to achieve compliance with that standard. A.1 ABYC + ISO additional requirements = ISO compliance A.2 ISO + ABYC additional requirements = ABYC & USCG compliance

2 A.1.1. Referenced Standards GLOBAL COMPLIANCE APPENDIX A.1 VENTILATION OF FUEL SYSTEMS ABYC + ISO ADDITIONAL REQUIREMENTS = ISO COMPLIANCE This document shall be used in conjunction with the following standards: International Organization for Standardization (ISO): Small craft Permanently installed fuel systems (ISO 10088:2009) This International Standard specifies the requirements for the design, materials, construction, installation and testing of permanently installed fuel systems as installed for internal combustion engines. It applies to all parts of permanently installed diesel and petrol fuel systems as installed, from the fuel fill opening to the point of connection with the propulsion or auxiliary engine on inboard- and outboard-powered small craft of up to 24 m hull length. Requirements for the design, materials, construction and testing of permanently installed fixed fuel tanks are given in ISO Small craft Ventilation of petrol engine and/or petrol tank compartments (ISO 11105:1997) 1 Scope This International Standard specifies requirements for ventilation of petrol engine and petrol tank compartments in small craft of up to 24 m length of hull, having petrol engines for propulsion, electrical generation or mechanical power, to prevent accumulation of explosive gases in these compartments. Personal watercraft are not covered. American Boat & Yacht Council (ABYC): H-2 VENTILATION OF BOATS USING GASOLINE July SCOPE This standard applies to boats using gasoline for electrical generation, mechanical power or propulsion, including outboard powered boats. NOTES: 1. Ventilation guidelines for boats using diesel fuel are contained in ABYC H-32, Ventilation of Boats Using Diesel Fuel. 2. Ventilation cannot be relied upon to remove all carbon monoxide vapors that may be produced from the operation of the vessel or its equipment. See ABYC TH-22, Educational Information About Carbon Monoxide, and ABYC TH-23, Design, Construction And Testing Of Boats In Consideration Of Carbon Monoxide, for further information. 3. Heat Dissipation - The ventilation system described in this standard is sufficient to provide for the requirements for ventilation of gasoline vapors from the engine space. However, the standard may not provide sufficient ventilation for heat dissipation. H-32 VENTILATION OF BOATS USING DIESEL FUEL July SCOPE This standard applies to boats using diesel fuel for electrical generation, mechanical power, or propulsion. NOTE: The United States Coast Guard s mandatory requirements for ventilation for boats with gasoline engines for propulsion or auxiliary machinery are found in 33 CFR, Subpart K, Sections CFR Refer to the CFR for complete, current federal requirements. Additionally, see ABYC H-2, Ventilation of Boats Using Gasoline.

3 A.1.2. Additional Requirement Matrix Subject Heading (ABYC Clause no) Scope, Personal watercraft (H-2.2) Natural ventilation (Gasoline only) (H-2.5.3) Gasoline engines (H-2.5.4) Ignition protection (H ) (H ) Natural ventilation (Gasoline only) (H ) Arrangement of openings (Diesel and gasoline) (H ) (H ) Labeling (Gasoline only) (H ) Blowers (Gasoline only) (H ) Owner s Manual (Gasoline only) Additional ISO Requirements or comment (ISO Clause no.) Personal watercraft are excluded from ISO Follow ISO ( ) Natural ventilation is required for a compartment containing any type of permanently installed gasoline fuel tank and an electrical component other than a petrol level gauge sending unit, or is designated to contain a portable gasoline tank ( ) For all types of gasoline fuelled engines, powered ventilation is required ( ) For gasoline engine or gasoline tank compartments, ignition protection according to ISO 8848 is required for electrical components. ( ) The requirements of the cross-sectional area of ventilation ducting are based on net volume of the compartment gives a 3% higher requirement. ( , 5.4) Keep a distance of 400 mm (15.7 in) between the filler cap, tank vent and any air intake or exhaust of the engine room. ( ) If fitted with an exhaust blower, the H-2 label may be used for ISO compliance since the contents may be displayed in text, but only if English is an acceptable language in the country of sale. For countries with other languages, use the warning symbols shown in Figure 3. ( ) Blowers shall be rated according to ISO Graphs given in and H-2 for rated blower capacity can be regarded as comparable. ( ) An explanation of any warning symbols used and the statement Do not obstruct or modify the ventilation system shall be included in an owner s manual to be supplied with the boat. ( )

4 GLOBAL COMPLIANCE APPENDIX A.2 VENTILATION OF FUEL SYSTEMS ISO + ABYC ADDITIONAL REQUIREMENTS = ABYC & USCG COMPLIANCE A.1.1. Referenced Standards This document shall be used in conjunction with the following standards: International Organization for Standardization (ISO): Small craft Ventilation of petrol engine and/or petrol tank compartments (ISO 11105:1997) 1 Scope This International Standard specifies requirements for ventilation of petrol engine and petrol tank compartments in small craft of up to 24 m length of hull, having petrol engines for propulsion, electrical generation or mechanical power, to prevent accumulation of explosive gases in these compartments. Personal watercraft are not covered. Small craft - Permanently installed fuel systems and fixed fuel tanks ISO 10088:2009) 1 Scope This International Standard specifies the requirements for the design, materials, construction, installation and testing of permanently installed fuel systems as installed for internal combustion engines. It applies to all parts of permanently installed diesel and petrol fuel systems as installed, from the fuel fill opening to the point of connection with the propulsion or auxiliary engine on inboard- and outboard-powered small craft of up to 24 m hull length. Requirements for the design, materials, construction and testing of permanently installed fixed fuel tanks are given in ISO American Boat & Yacht Council (ABYC): H-2 VENTILATION OF BOATS USING GASOLINE July SCOPE This standard applies to boats using gasoline for electrical generation, mechanical power or propulsion, including outboard powered boats. H-32 VENTILATION OF BOATS USING DIESEL FUEL July SCOPE This standard applies to boats using diesel fuel for electrical generation, mechanical power, or propulsion.

5 A.2.2. Additional Requirement Matrix Subject Heading (ISO Clause no.) Compartments open to atmosphere (Petrol only) ( ) Volume of compartments (Petrol only) ( , 5.3) Electrical components (Petrol only) Natural ventilation, ducting (Petrol only) ( ) Powered ventilation (Petrol only) ( ) Powered ventilation, visual indicator (Petrol only) ( ) Powered ventilation, multiple blowers (Petrol only) ( ) Powered ventilation, ducting (Petrol only) ( ) Powered ventilation, warning label (Petrol only) ( ) Ventilation openings in aft surfaces (Petrol only) Outboard wells (Petrol only) Additional ABYC Requirements or comment (ABYC clause no.) Long spaces with a length-width ratio greater than 1:5 shall have openings at each end or along the sides if they are to be considered open to the atmosphere. (H ) Compartments are considered to be connected if the area of openings between the compartments is greater than 2 percent of the area between the compartments. The volume of a compartment shall include the volume of all connecting compartments or the compartments shall be ventilated separately (H-2.6.2) Electrical components in compartments communicating with a petrol tank compartment via a limber hole shall be ignition protected (H ) The intake and exhaust ducts shall not share the same plenum (H ) Ducts shall be self-draining so that water will drain from the ducts (H ) In an engine compartment, exhaust ducts shall be located as nearly as practicable below the engine. (H ) There shall be at least one powered blower for each petrol engine used for propulsion (except for jet boats covered by ABYC H-37) (H ) There shall be a visual indicator, other than switch position, at each blower switch location to indicate when electrical power is applied to the system (H ) Multiple blowers shall operate simultaneously and each blower shall have its own dedicated overcurrent protection (H ) The intake and exhaust ducts shall not share the same plenum (H ) Ducts shall be self-draining so that water will drain from the ducts (H ) In an engine compartment, exhaust ducts shall be located as nearly as practicable below the engine. (H ) Boats with a powered ventilation system shall have a label that meets the requirements of H (H ) Boats with accommodation shall have no ventilation openings in aft facing surfaces at the stern, except where testing in accordance with ABYC TH-23 has shown carbon monoxide levels below 125 ppm. (H ) If the space under an outboard motor is large enough

6 Combustion air (Petrol only) Ventilation opening positions (Diesel fuel) for a six gallon (27 litre) portable fuel tank, but is not intended for such usage, the space shall have a warning label that complies with H (H ) Ventilation provisions and openings to machinery spaces shall meet the combustion air requirements specified by the engine manufacturer for all engines in the space. (H-2.5.6) For diesel fuel systems on sailboats and powerboats > 8 m (26 ft), the lowest point of the ventilation opening shall be located above the maximum heeled waterline. For diesel fuel systems on powerboats < 8 m, the lowest point of the ventilation opening shall be located above the static float plane. (H )