1、American National Standardfor Off-Road Ground-SupportedOutdoor Power Equipment Gasoline Fuel Systems Performance Specifications andTest ProceduresANSI/OPEI B71.10-2013ANSI/OPEI B71.10-2013ANSI/OPEI B71.10-2013(revision ofANSI/OPEI B71.10-2008)American National Standardfor Off-Road Ground-SupportedOu
2、tdoor Power Equipment Gasoline Fuel Systems Performance Specificationsand Test ProceduresSponsorOutdoor Power Equipment InstituteApproved June 3, 2013Published August 26, 2013 American National Standards Institute, Inc.Approval of an American National Standard requires review by ANSI that therequire
3、ments for due process, consensus, and other criteria for approval havebeen met by the standards developer.Consensus is established when, in the judgement of the ANSI Board ofStandards Review, substantial agreement has been reached by directly andmaterially affected interests. Substantial agreement m
4、eans much more thana simple majority, but not necessarily unanimity. Consensus requires that allviews and objections be considered, and that a concerted effort be madetowards their resolution.The use of American National Standards is completely voluntary; theirexistence does not in any respect precl
5、ude anyone, whether he has approvedthe standards or not, from manufacturing, marketing, purchasing, or usingproducts, processes, or procedures not conforming to the standards.The American National Standards Institute does not develop standards andwill in no circumstances give an interpretation of an
6、y American NationalStandard. Moreover, no person shall have the right or authority to issue aninterpretation of an American National Standard in the name of the AmericanNational Standards Institute. Requests for interpretations should beaddressed to the secretariat or sponsor whose name appears on t
7、he titlepage of this standard.CAUTION NOTICE: This American National Standard may be revised orwithdrawn at any time. The procedures of the American National StandardsInstitute require that action be taken periodically to reaffirm, revise, orwithdraw this standard. Purchasers of American National St
8、andards mayreceive current information on all standards by calling or writing the AmericanNational Standards Institute.American National StandardPublished byAmerican National Standards Institute, Inc.25 West 43rd Street, New York, NY 10036Copyright 2013 by Outdoor Power Equipment InstituteAll rights
9、 reserved.No part of this publication may be reproduced in any form, stored in a retrieval system,or transmitted in any form or by any means (electronic, photocopying, recording, or otherwise),without prior written permission of the Outdoor Power Equipment Institute.Printed in the United States of A
10、mericai Contents Foreword . ii 1 Scope . 1 2 Normative References 1 3 Terms and Definitions 1 4 Performance Specifications 2 4.1 Construction 2 4.2 Fuel Tank Integrity . 2 4.3 Resistance to Stress Cracking 3 4.4 Fuel Line 3 4.5 Corrosion Resistance 3 4.6 Installation 3 4.7 Fuel Tank Overfill. 3 4.8
11、Requalification Requirement . 3 5 Test Procedures 3 5.1 Fuel Tank Leak Test 3 5.2 Fuel Tank Cyclic Pressure Integrity Test . 5 5.3 Fuel Tank Elevated Temperature Fuel Soak Test for PE Fuel Tanks . 5 5.4 Fuel Line Assembly Tensile Test. 8 5.5 Fuel Tank Overfill Test 9 Tables 1 Test Conditions . 4 2 S
12、ample Size vs. Test Soak Time 6 Figure 1 Test Acceptance . 9 Annexes A Rationale 10 B Bibliography . 13 Foreword (This foreword is not part of American National Standard ANSI/OPEI B71.10-2013.)This standard is a revision of American National Standard for Small Off-RoadGround-Supported Outdoor Power
13、Equipment - Gasoline Fuel Systems - Perfor-mance Specifications and Test Procedures, ANSI B71.10-2008. The first edition ofthis standard was approved and published by the American National Standards Insti-tute in 2008. This is the first revision to the original standard.The present revision was prep
14、ared by the Outdoor Power Equipment Institutes(OPEI) Fuel Systems Committee, as part of OPEIs continuing work on standards.A summary of the principal changes included in this revision follows:- Added explicit alternate leak test pressures for Leak Testing;- Added an additional performance test for F
15、uel Overflow test;- Changed the Elevated Temperature Hot Fuel Soak test applicability to includeall fuel tanks manufactured with linear HDPE, regardless of manufacturingprocess;- Revised the Elevated Temperature Hot Fuel Soak test acceptance criteria;- Further clarified the Fuel Line Assembly Tensil
16、e Test procedure.Consensus for this standard was achieved by use of the Canvass Method. This stan-dard contains two annexes that are informative and are not considered requirementsof this standard.Suggestions for improvement of the standard will be welcomed. They should be sentto the Outdoor Power E
17、quipment Institute, 341 South Patrick Street, Alexandria, VA22314.The following parties, recognized as having an interest in the standardization of safe-ty requirements for off-road ground-supported outdoor power equipment were con-tacted prior to the approval of this standard. Inclusion in the list
18、 does not necessarilyimply that the organization concurred with the submittal of the proposal to ANSI. Mr. Devin Anderson - ConsumerMr. Jeff Davis - ConsumerMr. Dan Nielsen - ConsumerMr. Russ ODaly - ConsumerMr. Steve Scholten - ConsumerMr. Joseph Harding, Portable Generator Manufacturers Associatio
19、n - General Interest Mr. Han Lim, Consumer Product Safety Commission - General Interest Mr. Steven D. Marty, Southwest Research Institute - General Interest Mr. Andy Meloeny, Testing Services Group - General Interest Mr. Adam Bechtold, Kubota Corporation - ProducerMr. Michael Huhman, Scag Power Equi
20、pment - ProducerMr. James Jongkind, American Honda - ProducerMr. Paul R. Reger, Flambeau, Inc.- ProducerMr. Roger Smith, Walbro Engine Management - Producerii1 AMERICAN NATIONAL STANDARD ANSI/OPEI B71.10-2013American National Standard for Off-Road Ground-Supported Outdoor Power Equipment Gasoline Fu
21、el Systems Performance Specifications and Test Procedures 1 Scope This standard describes performance based specifications and test procedures applicable to the gasoline fuel systems for off-road ground-supported outdoor power equipment with spark ignition engines of less than one liter displacement
22、. The effective implementation date of this standard shall be two (2) years after the publication date and shall apply to all products built after that date. Manufacturers may also comply with the requirements of this standard anytime after the publication date. Note: The tests described in this sta
23、ndard involve the use of hazardous materials, operations, and equipment. This standard does not purport to address all of the safety problems associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicab
24、ility of regulatory limitations prior to use. 2 Normative References The following standards contain provisions which, through reference in this text, constitute provisions of this American National Standard. All standards are subject to revision, and parties to agreements based on this American Nat
25、ional Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. EPA 40 CFR Part 90, Control of Emissions from Nonroad Spark-Ignition Engines at or Below 19 Kilowatts EPA 40 CFR Part 1054, Control of Emissions from New, Small Nonroad
26、 Spark-Ignition Engines and Equipment NFPA 497-2004, Recommended Practice for the Classification of Flammable Liquids, Gases, or Vapors and of Hazardous (Classified) Locations for Electrical Installations in Chemical Process Areas, 2004 Edition NFPA 70-2011, National Electrical Code 3 Terms and defi
27、nitions For the purposes of this document, the following terms and definitions apply. 3.1 Fuel Tank A storage vessel constructed of any material that is an integral part of the product that is used to supply fuel to engines regulated by EPA 40 CFR Parts 90 and 1054. This is distinct from separate fu
28、el storage vessels used for refuelling and not a part of the product (e.g., portable refueling containers). ANSI/OPEI B71.10-2013 2 3.2 Fuel Tank Assembly A fuel tank that includes separately assembled components to achieve its fuel tank function. 3.3 Operator Zone The space on or near the machine w
29、here the operator is normally stationed to control the machines functions. 3.4 Fuel System The fuel system includes the fuel tank, the filler cap, fuel lines (tubing or hoses), and any other component connected to the fuel tank containing liquid fuel. The fuel system includes the connections between
30、 the fuel line and other components. Components such as carburetors, fuel pumps, and vent lines are not addressed in this standard. 3.5 Stress Crack An external or internal fracture in plastic caused by nominal tensile stresses below the yield stress of that material. 3.6 Stress Crack Failure For th
31、e purposes of this standard, a failure is the propagation of a stress crack of sufficient magnitude to allow fuel to leak through the component wall. 3.7 Fresh Fuel Regular, unleaded gasoline purchased within three (3) months of the beginning of the test. 3.8 Class I, Group D Materials Gases, vapors
32、, or liquids that are explosive or pose a threat as ignitable mixtures as defined in NFPA 497-2004 and NFPA 70-2011. 3.9 Polyethylene (PE) Fuel Tank Polyethylene (PE) is a thermoplastic polymer often used in the manufacture of fuel tanks. For the purposes of this standard, PE does not include cross-
33、linked PE. 3.10 Design A design includes all specifications, including but not limited to the dimensions, materials, tolerances, production process, tooling, and documentation. 3.11 Active Leakage The presence of any re-formed bubbles and/or bubbles rising to the waters surface during the required t
34、est time of Table 1. 4 Performance Specifications 4.1 Construction All fuel tanks shall be designed and manufactured to hold gasoline without leaking, in accordance with the test procedure in 5.1. 4.2 Fuel tank integrity Every fuel tank design shall be qualified one-time in accordance with the cycli
35、c pressure test specified in 5.2. ANSI/OPEI B71.10-2013 3 4.3 Resistance to stress cracking Every Polyethylene (PE) fuel tank design shall be qualified one-time in accordance with the Elevated Temperature Fuel Soak test procedure in 5.3. 4.4 Fuel line All fuel line connection designs shall be qualif
36、ied one-time in accordance with the fuel line assembly tensile test requirements of 5.4, except as follows: - Fuel lines of less than 50 mm (2 inches) in length and which are held in place by compression after assembly; - Fuel line assembly connections which cannot reasonably be exposed to a tensile
37、 pull in the end use. 4.5 Corrosion resistance The fuel system should be designed, constructed, and installed to resist the anticipated internal and external corrosive environment for the intended use and life of the equipment. 4.6 Installation The fuel tank installation should accommodate the twist
38、ing and bending movements and vibrations of the machine during intended use. The connections of flexible parts with rigid parts of the tank installation assembly should be so designed and constructed as to maintain a sealed connection under these dynamic conditions. 4.7 Fuel tank overfill Every fuel
39、 tank/equipment design shall be qualified one-time in accordance with the fuel tank overfill test in section 5.5. 4.8 Requalification requirement For the purposes of the one-time design qualification tests in this standard, any substantive change to a design requires requalification. 5 Test Procedur
40、es 5.1 Fuel Tank Leak Test This test specification is used to confirm the integrity of a fuel tank or fuel tank assembly, if applicable, against leakage. Every fuel tank manufactured shall be leak tested, either as a separate tank or as a fuel tank assembly. ANSI/OPEI B71.10-2013 4 5.1.1 Leak Test P
41、rocedure (Immersion Method) (1) Seal all connections in the fuel tank sufficiently to allow pressure testing. Submerge the sealed fuel tank (assembly) in a dunk tank filled with clear water, such that the entire fuel tank is 25 mm (1 inch) to 305 mm (12 inches) under water. A fixture to support the
42、tank is allowed but not required for this test. The tank shall be submerged so as to minimize the ability of any surface of the tank to trap air bubbles from rising to the waters surface. (2) Pressurize the fuel tank to the minimum value and hold the pressure for the minimum time period. A. Pressuri
43、zed fuel tank designs shall be tested at the greater of 34.5 kPa (5 lb/in) or 1.5 times the maximum expected operating pressure for 15 seconds. OR B. For fuel tanks fundamentally operating at atmospheric pressure, Table 1 provides two test pressure options when performing a fuel tank leak test in ac
44、cordance with the Immersion Method. Either test condition, as shown in Table 1, may be used to detect leaks. Table 1 Test Conditions Minimum Required Minimum Required Test Pressure kPa (lb/in) Test Time (Seconds) Option 1 20.7 (3) 30 Option 2 34.5 (5) 15 (3) While under pressure, visually observe th
45、e tank for evidence of active leakage, after wiping away initial bubbles. 5.1.2 Acceptance No active leakage is allowed on any tank. 5.1.3 Other Leak Test Procedures Other test methods such as the pressure decay and mass flow methods are also acceptable means of leak testing fuel tanks. Other test m
46、ethods shall demonstrate the ability to find leaks found with the prescribed Immersion Method. 5.2 Fuel Tank Cyclic Pressure Integrity Test The test shall be performed as a one-time design qualification test for a given design of a fuel tank or fuel tank assembly. Caution: This test involves handlin
47、g of gasoline. Personnel should take necessary safety precautions when performing this test. ANSI/OPEI B71.10-2013 5 The test shall be performed with a minimum of four (4) randomly selected samples. At least one (1) sample per mold cavity shall be qualified. All fuel tank openings shall be sealed. W
48、here possible, tank openings should be sealed in a manner consistent with actual assembly connections. If a fixture is used to support the tank, it shall be consistent with the application. 5.2.1 Conditioning For non-metallic tanks: Using E10 fuel, fill the tanks to at least 90% of the manufacturers
49、 recommended “full” level, and store at 20C 5C (68F 9F) for a minimum of fourteen (14) days. 5.2.2 Test procedure (1) Remove the fuel from the tanks. Apply cyclic pressure in a range from zero (0) to 27.6 kPa 3 kPa (4 psi 0.4 psi), at an overall rate between 2 and 5 cycles per minute, with a minimum two second hold time. (NOTE: One cycle = fill, hold, and vent.) NOTE: The test may be performed with air pressure, water pressure, or a water filled tank cycled with air pressure. Water has the advantage of visually showing a premature leak
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