An Urgent Bulletin from CSA Group Gas Products No. 335 (Supersedes Notice Gas Products No. 270, Ref No: N12-055) Effective Date: October 1, 2015 Date: July 21, 2014 Apply Before February 2, 2015 Announcing: Publication of ANSI NGV 3.1-2014 / CSA 12.3-2014 Fuel system components for compressed natural gas powered vehicles Class No: 3315 84, NATURAL GAS VEHICLE (NGV) - Fuel System Components-Certified to US Standards 3315 04, NATURAL GAS VEHICLE (NGV) - Fuel System Components To purchase the Standard, visit us at www.shopcsa.ca Who is affected? Manufacturers of fuel system components for compressed natural gas powered vehicles. What do you do? 1. CSA Group Service Delivery staff will contact you to address compliance with each revision as applicable to the product designs covered in your affected Certification Reports. In addition to updates to your Certificate(s) of Compliance & Report(s), testing may be required to comply with these revisions. 2. Please respond within thirty (30) days of receiving CSA Group s Application for CSA Certification Services and Quotation communication. You must respond no later than February 2, 2015 in order to guarantee the update to your certification is completed by October 1, 2015. If testing is needed, we will inform you of the samples required. Approvals: American National Standards Institute, Inc.: February 25, 2014. Interprovincial Gas Advisory Council: February 27, 2014. Major Revisions: Revisions to this standard supersede the requirements in ANSI NGV 3.1-2012 CSA 12.3-2012. See attachment 1 For questions specific to your file or products contact your CSA Group technical staff associate. Go to http://directories.csa-international.org/ and enter your Master Contract # and the class numbers associated with this Notice to determine which of your products are affected. For technical questions on this Certification Notice Contact Greg Chirdon by phone 704.552.2919, fax 704.552.0683 or e-mail greg.chirdon@csagroup.org In the event your models do not comply with the effective standards, arrangements must be made to bring them into compliance. In the event we do not receive a response as to your currently certified models, prior to the above applicable effective date(s), the certification of such models will be discontinued. Visit us at www.csagroup.org Click on "Contact Us" for the online phone listing of our Offices and Partners DQD 529.01 Rev 2012-04-26 The Canadian Standards Association. All rights reserved Ref No: N14-083 I:\Wgm4\DOC_CTRL\Notices\E-H\GasProducts335.doc Page 1 of 9
ATTACHMENT 1 Major Revisions Note: In the line items shown below, if there is text that is underlined such wording reflects the newly added verbiage to the clause. 1. All on-board natural gas vehicle (NGV) fuel hoses and assemblies requirements have been transferred from ANSI/CSA 4.2 CSA 12.52 to NGV 3.1-2014 CSA 12.3-2014 because the NGV 3.1-2014 CSA 12.3-2014 standard deals with fuel system components intended for use on-board a NGV vehicle. In contrast, ANSI/CSA 4.2 CSA 12.52 deals with hoses for stationary dispensers. 2. Clause 1.2: The 2014 edition now includes the statement: The standard also applies to components downstream of the first stage of pressure reduction with a working pressure designated by the manufacturer in kpa (psi). 3. The definition for compressed natural gas (CNG) is modified. It now reads as follows: Natural gas which has been compressed and stored for use as a vehicle fuel meeting the gas composition requirements specified in clause 4.5 of NGV 3.1/CSA 12.3. The former NGV 3.1 edition made reference to the gas composition requirements as specified in NGV 2. 4. The definition for duty cycle is modified. It now reads as follows: one complete operation of the component such as pressurization and depressurization or on and off as applicable. 5. The definition for burst pressure is modified. It now reads as follows: Pressure that causes structural failure of the component and consequential fluid loss through the component envelope, not including gaskets or seals. The highest pressure during a burst test. 6. The definition for service pressure is modified. It now reads as follows: The settled pressure at a uniform gas temperature of 21 C (70 F). Service pressure shall only be used for components that are upstream of the first stream of the first stage of pressure. 7. The definition for working pressure is modified. It now reads as follows: Maximum pressure which a component can be expected to experience in actual service. Working pressure shall only be used for components that are downstream of the first stage of pressure reduction. 8. The definition for relief line (vent line) is renamed as discharge line (vent line). 9. The definition for relief line closure is renamed as discharge line closure. 10. The definition for repeated use relief line closure is renamed as repeated use discharge line closure. 11. Clause 4.1.1: The 2014 edition now includes the requirement: Resistance to chloride stress corrosion cracking shall be taken under consideration if selecting stainless steel materials. Resistance to sustained load cracking shall be taken under consideration if selecting aluminum materials. Resistance to galvanic corrosion shall be taken under consideration when joining components containing dissimilar materials. 12. Clause 4.3 Component literature : The 2014 edition now includes expanded coverage related to manufacturers instructions. This expanded coverage replaces former clause 1.4 instructions. 13. Clause 4.4.1 Markings : the markings section is modified. The changes include the following: the name and year of the standard is now required on the product. Both the 2014 edition and the previous edition make reference to the service pressure codes P24, P30 and P36. But now the 2014 edition clarifies that such codes pertain to service pressure and the correlating components upstream of the first stage of pressure reduction, or the working pressure for components downstream of the first stage of pressure reduction. I:\Wgm4\DOC_CTRL\Notices\E-H\GasProducts335.doc Page 2 of 9
The previous edition of the standard said that components shall be marked with either a serial number or date code. The 2014 edition now gives an additional option of using a suitable traceability code. The previous edition of the standard said that components shall be marked with the symbol of the certification agency. The 2014 edition indicates that components shall be marked with the symbol of the certification agency or the independent inspection organization, if applicable. CSA s certification program requires the application of the CSA Mark. 14. Clause 5.1.3: The standard now includes tolerances on specified test temperatures. Similarly, the standard has introduced tolerances on specified test pressures. 15. Clause 5.2 hydrostatic strength: In clause 5.1.1, the standard now expresses the safety factor in terms of a percent as opposed to a number. In other words, the applied safety factor is 250% (as opposed to 2.5 times the relevant pressure). 16. Clause 5.2 hydrostatic strength: In clause 5.1.2, the rate of increasing the hydrostatic test pressure is now modified. The standard now says: The hydrostatic pressure shall then be increased at a rate of less than or equal to 5 percent of the service pressure or working pressure per second, whichever is appropriate. 17. Clause 5.3 Leakage: The standard now adds the following cautionary statement: If the component is capable of trapping the test gas within the component at the end of the test, air shall not be used. 18. Clause 5.3.4.1 Test conditions components exposed to container pressure (pertaining to the leakage test): Both the 2014 edition and the previous standard mention to condition the component. When it comes to the -40 C temperature condition, the 2014 edition now says to pressurize the component at both 75 percent and 2.5 percent of service pressure. The previous standard said, for the -40 C temperature condition, to pressurize at both 100 percent and 2.5 percent of service pressure. 19. Clause 5.6.2.2 Room temperature cycling (pertaining to the Continuous operation test): The standard clarifies that the component shall be operated at 96 percent of the total cycles with parts stabilized at room temperature and at service pressure for components upstream of the first stage of the pressure reduction or working pressure for components downstream of the first stage of pressure reduction. 20. Clause 5.6.2.3 High temperature cycling (pertaining to the Continuous operation test): The standard clarifies that the cycling procedure shall be repeated with the part stabilized at the appropriate maximum temperature 85 C or 120 C for 2 percent of the total cycles at 125 percent of service pressure for components upstream of the first stage of pressure reduction or working pressure for components downstream of the first stage of pressure reduction. 21. Clause 5.6.2.4 Low temperature cycling (pertaining to the Continuous operation test): The standard clarifies that the cycling procedure shall be repeated with the part stabilized at -40 C for 2 percent of the total cycles at 100 percent of the service pressure for components upstream of the first stage of pressure reduction or working pressure for components downstream of the first stage of pressure reduction. 22. Clause 5.7.1 Corrosion resistance: The 2014 edition now includes Table 3, which is titled Corrosion Test Applicability. This table enables the reader of the standard to understand more clearly what kind of test (whether the salt spray test or the accelerated cyclic corrosion test) applies for a particular type of vehicle component. 23. Clause 5.7.2 Corrosion resistance (salt spray exposure test): Both the 2014 edition and the previous standard include a salt spray test. However, the 2014 edition elaborates on the type of components that are to be subjected to the salt spray test. Also, the new edition states that a minimum of three samples shall undergo this test. 24. Clause 5.7.3 Corrosion resistance (accelerated cyclic corrosion): The 2014 edition has added a new test to the standard, which is titled Accelerated Cyclic Corrosion. 25. Clause 5.8 Atmospheric exposure test: The 2014 edition adds the title Atmospheric exposure test and associates it to clause number 5.8. But the atmospheric exposure test is really two separate tests: oxygen aging, (clause 5.8.2) and Ozone (5.8.3). One test is new to the standard and the other is not. I:\Wgm4\DOC_CTRL\Notices\E-H\GasProducts335.doc Page 3 of 9
The oxygen aging test is contained in both the 2014 edition and the previous standard, and the test methodology is identical between the two documents. The ozone test is new to the 2014 edition, and therefore, all currently certified NGV components are subject to undergoing this test. 26. Clause 5.10.3 Non-metallic Material Immersion (Compressor oil exposure): The 2014 edition corrects an error stated in the introductory clause of the previous standard. The new edition correctly states that this test applies to a non-metallic material part in contact with ester-based or alpha olefin-based synthetic compressor oils or nonsynthetic compressor oils and their combinations. The previous standard inadvertently mentioned natural gas instead of the types of oil in the opening paragraph. 27. Clause 5.11 Vibration resistance: the standard clarifies to vibrate the component, pressurized to its service pressure for components upstream of the first stage of pressure reduction, or working pressure for components downstream of the first stage of pressure reduction. 28. Clause 5.12 Stress corrosion cracking resistance: The stress corrosion cracking resistance test is modified. The changes include: The term copper alloy replaces the term brass. In other words, fuel-conveying copper alloy components or sub-components are subject to this test. The test methodology makes reference to ASTM B858. The clause now mentions that the copper alloy components shall be subjected to the highest stresses normally imposed on it as a result of assembly. Moreover, the clause elaborates on how threads shall be assembled for test purposes. The clause also states that the test shall be repeated if there is a change in alloy manufacturers or if the machining process is changed in such a way that could affect residual stresses. 29. Clause 5.14 Ultraviolet resistance of external surfaces: The 2014 edition has added a new test to the standard, which is titled Ultraviolet Resistance of External Surfaces. 30. Clause 5.15 Automotive fluid exposure: The 2014 edition has added a new test to the standard, which is titled Automotive Fluid Exposure. 31. Clause 6 Quality Assurance: The 2014 edition has added a new section to the standard, which is titled Quality Assurance. 32. Clause 7 Inspection and acceptance testing: The 2014 edition has added a new section to the standard, which is titled Inspection and Acceptance Testing. 33. Clause 8.2 Markings (pertaining to the Check Valve): the marking revisions for the check valve are as mentioned in line item 13 above. 34. Clause 8.4.1 Table 4 Applicable tests (pertaining to the check valve): Table 4 is modified. Two tests were added into the table: atmospheric exposure and automotive fluid exposure. As a reminder, though, the table in the previous edition of the standard already included one of the two atmospheric exposure tests, that is, the oxygen aging test. 35. Clause 8.4.2 Leakage (pertaining to the check valve): Table 5 Test temperature and pressures is modified. The term SP (service pressure) is substituted for NWP (nominal working pressure) in the table s first column denoting the type of pressure. The term SP (service pressure) is substituted for WP (working pressure) in the table s second column denoting the type of pressure. 36. Clause 8.4.4 Cycling (pertaining to the check valve): The pressure threshold for the cycling test is modified. The clause now states: Connect the check valve to a test fixture and apply 125 percent of service pressure or 100 percent of working pressure in six pulses to the check valve inlet with the outlet closed. Then vent pressure from I:\Wgm4\DOC_CTRL\Notices\E-H\GasProducts335.doc Page 4 of 9
the check valve inlet. Lower the pressure on the check valve outlet side to between 0 and a maximum of 62.5 percent of service pressure or working pressure prior to the next cycle. 37. Clause 9.2 Markings (pertaining to a Manual Valve): the marking revisions for the manual valve are as mentioned in line item 13 above. 38. Clause 9.4.1 Table 6 Applicable tests (pertaining to a manual valve): Table 6 is modified. Two tests were added into the table: atmospheric exposure and automotive fluid exposure. As a reminder, though, the table in the previous edition of the standard already included one of the two atmospheric exposure tests, that is, the 39. Clause 9.4.2 Continuous operation (pertaining to a service valve): The clause substitutes the term fill or duty for the term pressure in the fourth paragraph. The sentence now reads: The service valve in its normal operational position shall also be exposed to the total number of fill or duty cycles appropriate for the component in which it is affixed and shall meet the internal and external leakage requirements of Part 2, section 2.5, Leakage. 40. Clause 9.4.2.2 Continuous operation, all other manual valves (pertaining to manual valves): The pressure threshold for the continuous operation test is modified. The clause now states: The manual valve shall be tested in accordance with clause 5.6, for 10,000 cycles at 125 percent of service pressure for components upstream of the first stage of pressure reduction or 100 percent of working pressure for components downstream of the first stage of pressure reduction, with a downstream pressure of the test fixture less than 500 kpa. Additionally, the clause now includes the following statement: If the valve is designed to be used with pressure differential in both directions then the cycles shall be conducted in each direction. At the discretion of the manufacturer and independent inspection or test agency, separate samples may be used for each direction. 41. Clause 9.4.3 Operating torque (pertaining to a manual valve): The clause now states: Following clause 9.3.1, the manual valve shall be capable of completely opening and closing when a torque no greater than the appropriate torque specified in Table 6, is applied to the valve handle in a direction that opens the valve completely and in the opposite direction with the valve pressurized at 125 percent of service pressure for components upstream of the first stage of pressure reduction or 100 percent of working pressure for components downstream of the first stage of pressure reduction. 42. Clause 10.2 Markings (pertaining to a manual container valve): the marking revisions for the manual container valve are as mentioned in line item 13 above. 43. Clause 10.3.6 (pertaining to a manual container valve): The clause has added the following text: Manual container valves incorporating an internal excess flow valve shall have a means for safe venting of the container. In addition to the general requirements of clause 4.3 valve manufacturers shall provide component literature describing the safe venting of the container contents. A cautionary statement shall be included regarding venting of wet gas under low temperature (cold ambient) conditions and the risk of freeze up. 44. Clause 10.4.1 Table 8 Applicable tests (pertaining to a manual container valve): Table 8 is modified. Two tests the 45. Clause 10.4.2 Continuous operation (pertaining to a manual container valve): The introductory paragraph deletes the following sentence: The test fixture shall be pressurized through the inlet of the valve and depressurized through the outlet of the valve. The clause adds the following statement: If the valve is designed to be used with pressure differential in both directions then the cycles shall be conducted in each direction. At the discretion of the manufacturer and independent inspection or test agency, separate samples may be used for each direction. 46. Clause 10.4.3 Operating torque (pertaining to a manual container valve): The operating torque test is to be conducted at a temperature of -40 C and now at the service pressure (as opposed to the working pressure). I:\Wgm4\DOC_CTRL\Notices\E-H\GasProducts335.doc Page 5 of 9
47. Clause 11.2 Markings (pertaining to an automatic valve and automatic container valve): the marking revisions for an automatic valve and automatic container valve are as mentioned in line item 13 above. 48. Clause 11.3.3 (pertaining to an automatic valve and automatic container vale), this clause now adds the following text: Automatic container valves incorporating an internal excess flow valve shall have a means for safe venting of the container. In addition, to the general requirements of clause 4.3 valve manufacturers shall provide component literature describing the safe venting of the container contents. A cautionary statement shall be included regarding venting of wet gas under low temperature (cold ambient) conditions and the risk of freeze up. 49. Clause 11.4.1 Table 10 Applicable tests (pertaining to an automatic valve and automatic container valve): Table 10 is modified. Two tests were added into the table: atmospheric exposure and automotive fluid exposure. As a reminder, though, the table in the previous edition already included one of the two atmospheric exposure tests, that is, the 50. Clause 11.4.2 Continuous operation (pertaining to an automatic valve and automatic container valve): The continuous operation test is modified. The text now reads: An automatic valve and automatic container valve shall meet the requirements of Clause 5.6 for 50,000 cycles, but the downstream pressure of the test fixture shall be lowered to less than 500 kpa. The test fixture shall be pressurized through the inlet of the valve, and depressurized through the outlet of the valve. 51. Clause 12.2 Markings (pertaining to a gas injector): the marking revisions for a gas injector are as mentioned in line item 13 above 52. Clause 12.4.1 Table 11 Applicable tests (pertaining to a gas injector): Table 11 is modified. Two tests were 53. Clause 13.2 Markings (pertaining to a pressure indicator): the marking revisions for a pressure indicator are as mentioned in line item 13 above. 54. Clause 13.4.1 Table 12 Applicable tests (pertaining to a pressure indicator): Table 12 is modified. Two tests the 55. Clause 14.2 Markings (pertaining to a pressure regulator): the marking revisions for a pressure regulator are as mentioned in line item 13 above. 56. Clause 14.4.1 Table 13 Applicable tests (pertaining to a pressure regulator): Table 13 is modified. Two tests the 57. Clause 14.4.2 Hydrostatic strength (pertaining to a pressure regulator): The hydrostatic strength test is modified. The changes are as follows: The term service pressure is substituted for working pressure. In other words, the clause now reads: The hydrostatic test applies to the portion of the pressure regulator normally exposed to service pressure. The test pressure is different. The clause now reads: A hydrostatic pressure of 250 percent of the specified service pressure of the pressure regulator shall be applied to the inlet for a period of 3 minutes. The previous edition of the standard read: A hydrostatic pressure of four times specified working pressure of the pressure regulator shall be applied to the inlet for a period of three minutes. 58. Clause 14.4.4 Continuous operation (pertaining to a pressure regulator): The continuous operation test is modified. The changes are as follows: I:\Wgm4\DOC_CTRL\Notices\E-H\GasProducts335.doc Page 6 of 9
In clause a of 14.4.4, the test pressure is increased to 125 percent of service pressure. The clause now reads: The pressure regulator shall be cycled for 95 percent of the total number of cycles at room temperature and at 125 percent of service pressure. In contrast, the previous edition of the standard shows at 1.0 times the service pressure. In clause b of 14.4.4, the test pressure is increased to 125 percent of service pressure. The clause now reads: The inlet pressure of the pressure regulator shall be cycled 1 percent of the total number of cycles at room temperature from 125 percent of service pressure to 50 percent of the inlet pressure. In contrast, the previous edition of the standard shows 1.0 times the service pressure. In clause c of 14.4.4, the test pressure is increased to 125 percent of service pressure. The clause now reads: The cycling procedure in clause 14.4.4a shall be repeated at the applicable maximum temperature and at 125 percent of service pressure for 1 percent of the total cycles. In contrast, the previous edition of the standard shows at rated inlet pressure. In clause d of 14.4.4, the test pressure is increased to 125 percent of service pressure. The clause now reads: The cycling procedure in clause 14.4.4b shall be repeated at the applicable maximum temperature and at 125 percent of service pressure for 1 percent of the total cycles. In contrast, the previous edition of the standard shows at rated inlet pressure. In clause e of 14.4.4, it now states that the cycling procedure in clause 14.4.4a shall be repeated at - 40 C and at 62.5 percent of service pressure for 1 percent of the total cycles. In contrast, the previous edition of the standard shows at 50 percent of rated inlet pressure. In clause f of 14.4.4, it now states that the cycling procedure in clause 14.4.4b shall be repeated at 62.5 percent of service pressure for 1 percent of the total cycles. In contrast, the previous edition of the standard shows at 50 percent of rated inlet pressure. 59. Clause 14.4.5 Pressure impulse (pertaining to a pressure regulator): The pressure impulse test is modified. The test pressure is increased to 125 percent of service pressure (as opposed to the previous edition of the standard s test pressure of service pressure. In clause 14.4.5.2, please note that the service pressure is substituted for nominal working pressure. 60. Clause 15.2 Markings (pertaining to a gas flow adjuster): the marking revisions for a gas flow adjuster are as mentioned in line item 13 above. 61. Clause 15.4.1 Table 14 Applicable tests (pertaining to a gas flow adjuster): Table 14 is modified. Two tests were 62. Clause 16.2 Markings (pertaining to a gas/air mixer): the marking revisions for a gas air mixer are as mentioned in line item 13 above. 63. Clause 16.4.1 Table 15 Applicable tests (pertaining to a gas/air mixer): Table 15 is modified. Two tests were 64. Clause 17.2 Markings (pertaining to a pressure relief valve): the marking revisions for a pressure relief valve are similar to as mentioned in line item 13 above except it does not include reference to the codes P24, P30, and P36, which signify the service pressures that this standard covers. 65. Clause 17.4.1 Table 16 Applicable tests (pertaining to a pressure relief valve): Table 16 is modified. Two tests the 66. Clause 17.4.2 Hydrostatic strength (pertaining to a pressure relief valve): The hydrostatic strength test is modified. The test pressure for the hydrostatic strength test is now based on 400 percent of the maximum set pressure or I:\Wgm4\DOC_CTRL\Notices\E-H\GasProducts335.doc Page 7 of 9
600 kpa whichever is greater of the pressure relief valve. The previous edition of the standard indicated that the test pressure was four times the service pressure of the relief valve. 67. Clause 19.2 Markings (pertaining to an excess flow valve): the marking revisions for an excess flow valve are as mentioned in line item 13 above. 68. Clause 19.4.1 Table 17 Applicable tests (pertaining to an excess flow valve): Table 17 is modified. Two tests the 69. Clause 19.4.5 Continuous operation (pertaining to an excess flow valve): The test pressure is increased to 125 percent of service pressure. The clause now reads: Cycle the excess flow valve 20 times at a pressure differential equal to 125 percent of service pressure. In contrast, the previous edition of the standard shows 95 percent of working pressure. 70. Clause 20.2 Markings (pertaining to gas-tight housing and ventilation hoses and passages): the marking revisions for a pressure relief valve are similar to as mentioned in line item 13 above except it does not include reference to the codes P24, P30, and P36, which signify the service pressures that this standard covers. Addition, the revision does not make reference to the requirement for a serial number, date code or a suitable traceability code. Also, the revision states that in the event that a component cannot accommodate all marking requirements listed in clause 20.2, the manufacture shall include missing marking information with the packaging of the component. 71. Clause 20.3.2 (pertaining to gas-tight housing and ventilation hoses and passages): With regard to inspection and acceptance testing, the clause states: Gas-tight housings and ventilation hoses and passages shall comply with the requirements in Clause 7.4, except that the test shall be run at 50 kpa. 72. Clause 20.4.1 Table 18 Applicable tests (pertaining to gas-tight housing and ventilation hoses and passages): Table 18 is modified. Two tests were added into the table: atmospheric exposure and automotive fluid exposure. As a reminder, though, the table in the previous edition of the standard already included one of the two atmospheric exposure tests, that is, the 73. Clause 20.4.3.2 External leakage, ventilation passages of pressure retaining components (pertaining to gas-tight housing and ventilation hoses and passes): The clause now states to plug the ventilation passage outlets and pressurize the ventilation passages to the maximum pressure the vent passage is expected to be exposed to in service as specified by the manufacturer. In contrast, the previous edition of the standard shows to the component service pressure. 74. Clause 21.2 Markings (pertaining to a rigid fuel line): the marking revisions for a rigid fuel line are as mentioned in line item 13 above. 75. Clause 21.4.1 Table 19 Applicable tests (pertaining to a rigid fuel line): Table 19 is modified. Two tests were Also, Table 19 now marks the corrosion resistance test as being not applicable for a rigid fuel line. 76. Clause 21.4.3 Bending (pertaining to a rigid fuel line): The bending test is modified. The clause now reads: Close the ends of the rigid fuel line and pressurize it hydraulically to 250 percent of service pressure for components upstream of the first stage of pressure reduction or 400 percent of working pressure for components downstream of the first stage of pressure reduction. In contrast, the previous edition of the standard reads as follows: close the ends of the rigid fuel line and pressurize it hydraulically to four times service pressure. 77. Former NGV 3.1-2012 CSA 12.3-2012, clause 17 is titled Flexible Fuel Line. The correlating new clause in the 2014 edition is number 22. As mentioned in line item 1 above, all on-board natural gas vehicle (NGV) fuel hoses and assemblies requirements have been transferred from ANSI/CSA 4.2 CSA 12.52 to NGV 3.1-2014 CSA 12.3-2014 because the NGV 3.1-2014 CSA 12.3-2014 standard deals with fuel system components intended for use on-board a NGV vehicle. Consequently, NGV 3.1-2014 CSA 12.3-2014 titles the new clause 22 as Flexible fuel lines, hoses and assemblies. Clause 22 is, therefore, the appropriate section to find the I:\Wgm4\DOC_CTRL\Notices\E-H\GasProducts335.doc Page 8 of 9
requirements and safety tests pertinent to not only flexible fuel lines, but also hoses and hose assemblies. Clause 22 includes the following coverage: Scope Markings Construction, assembly and installation instructions Tests: hydrostatic strength; leakage; excess torque resistance; continuous operation; corrosion resistance; atmospheric exposure (oxygen aging and ozone tests); non-metallic material immersion; vibration resistance; ultraviolet resistance of external surfaces; electrical conductivity; kink resistance; marking material legibility; automotive fluid exposure, verification of hose cover perforations; hose permeation; and tensile test of hose assembly. 78. Clause 22.4.15, Tensile test of hose assembly: The 2014 edition of NGV 3.1 CSA 12.3 has revised this test (as compared to the same test formerly contained in NGV 4.2-1999 CSA 12.52-M99 (reaffirmed 2009). The changes include the following: The pull force now differs depending on the hose assembly s nominal diameter. For hoses intended for other than the engine compartment, such a hose assembly is now air oven aged for 70 hours at 85 C. The former temperature, as mentioned in the NGV 4.2 standard, is 93 C. 79. Clause 22.4.13 Verification of hose cover perforations: The 2014 edition has added the verification of hose cover perforations test into its standard. This test is identical to the test formerly contained in NGV 4.2-1999 CSA 12.52-M99 (reaffirmed 2009). 80. Clause 22.4.14 Hose permeation: The 2014 edition of the standard has added a new test to the standard, which is titled hose permeation. 81. Clause 23.2 Markings (pertaining to a filter): the marking revisions for a filter are as mentioned in line item 13 above. 82. Clause 23.4.1 Table 23 Applicable tests (pertaining to a filter): Table 23 is modified. Two tests were added into the table: atmospheric exposure and automotive fluid exposure. As a reminder, though, the table in the previous edition of the standard already included one of the two atmospheric exposure tests, that is, the oxygen aging test. Also, table 23 has deleted reference to the pull off test. 83. Clause 24.4.1 Fitting: Table 24 Applicable tests (pertaining to a fitting): Table 24 is modified. Two tests were 84. Clause 24.4.2.1 Continuous operation (pertaining to a fitting): The clause now reads as follows: Fittings shall be capable of withstanding 50,000 cycles of operation in accordance with clause 5.6 from 10 percent of service pressure to 125 percent of service pressure for fittings upstream of the first stage of pressure reduction or working pressure for fittings that are downstream of the first stage of pressure reduction at ambient temperature. 85. Clause 24.4.2.2 Continuous operation (pertaining to a fitting): The clause now reads as follows: Fittings shall be capable of withstanding 50,000 cycles of operation in accordance with clause 5.6 from 60 percent of service pressure to 125 percent of service pressure for fittings upstream of the first stage of pressure reduction or working pressure for fittings that are downstream of the first stage of pressure reduction. 86. The 2014 edition has added coverage for discharge line closures (clause 26). 87. The 2014 edition has added Annex A, which is titled Extreme Thermal Cycling Test. Annex A is an Informative Annex only. I:\Wgm4\DOC_CTRL\Notices\E-H\GasProducts335.doc Page 9 of 9