kSIST FprEN ISO 14469-1:2016

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Véhicules routiers - Connecteur de remplissage en gaz naturel comprimé (GNC) - Partie 1: Connecteur 20 MPa (200 bar) (ISO 14469-1:2004)Road vehicles - Compressed natural gas (CNG) refuelling connector - Part 1: 20 MPa (200 bar) connector (ISO 14469-1:2004)43.060.40Sistemi za gorivoFuel systemsICS:Ta slovenski standard je istoveten z:FprEN ISO 14469-1kSIST FprEN ISO 14469-1:2016en,fr,de01-december-2016kSIST FprEN ISO 14469-1:2016SLOVENSKI
STANDARD



kSIST FprEN ISO 14469-1:2016



Reference numberISO 14469-1:2004(E)© ISO 2004
INTERNATIONAL STANDARD ISO14469-1First edition2004-11-01Road vehicles — Compressed natural gas (CNG) refuelling connector — Part 1: 20 MPa (200 bar) connector Véhicules routiers — Connecteur de remplissage en gaz naturel comprimé (GNC) — Partie 1: Connecteur 20 MPa (200 bar)
kSIST FprEN ISO 14469-1:2016



ISO 14469-1:2004(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.
©
ISO 2004 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISO's member body in the country of the requester. ISO copyright office Case postale 56 • CH-1211 Geneva 20 Tel.
+ 41 22 749 01 11 Fax
+ 41 22 749 09 47 E-mail
copyright@iso.org Web
www.iso.org Published in Switzerland
ii © ISO 2004 – All rights reserved
kSIST FprEN ISO 14469-1:2016



ISO 14469-1:2004(E) © ISO 2004 – All rights reserved iii Contents Page Foreword.iv Introduction.v 1 Scope.1 2 Normative references.1 3 Terms and definitions.1 4 General construction requirements.2 5 Nozzles.3 6 Standard receptacle dimensions.4 7 Receptacles.5 8 Instructions.5 9 Marking.6 10 Tests.6 Annex A (informative)
Nozzle characteristics.20 Annex B (informative)
Manufacturing and production test plan.21 Annex C (normative)
Receptacle test fixture.22
kSIST FprEN ISO 14469-1:2016



ISO 14469-1:2004(E) iv © ISO 2004 – All rights reserved Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 14469-1 was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 25, Road vehicles using natural gas. ISO 14469 consists of the following parts, under the general title Road vehicles — Compressed natural gas (CNG) refuelling connector: =Part 1: 20 MPa (200 bar) connector Size 2 and 25 MPa (250 bar) connectors will form the subjects of future parts 2 and 3. kSIST FprEN ISO 14469-1:2016



ISO 14469-1:2004(E) © ISO 2004 – All rights reserved v Introduction This part of ISO 14469 was developed to use in the examination, testing and certification of newly produced compressed natural (CNG) gas vehicle fuelling nozzles and receptacles and, as such, applies only to the nozzles and receptacles used in CNG fuelling systems, and not to the system itself. A nozzle certified to this part of ISO 14469 will be functionally compatible from a safety and performance perspective with all listed receptacles of compatible profile and system pressure. Similarly, a certified receptacle will be functionally compatible from a safety and performance perspective with all listed nozzles of compatible profile and system pressure. As there may eventually be many different kinds of nozzles and receptacles available from a variety of manufacturers which, for safety reasons, must all be compatible with one another, this part of ISO 14469 specifies a series of receptacle profiles. These standard profiles incorporate the design specifications (mating materials, geometry and tolerances) which may be considered in the certification of a submitted nozzle or receptacle. This part of ISO 14469 refers only to one working pressure and one application. Other working pressures and applications are under consideration for the future. The construction and performance of nozzles and receptacles are based on the observation that three main parameters affect user safety and system compatibility. a) Working pressure All nozzles and receptacles are designed to have a working pressure of 25 MPa (250 bar). b) Design life Frequency of use is the second parameter to be considered. Since frequency of use will differ with the nozzle/receptacle application (i.e. public sector, fleet employee and residential), all receptacles will be tested at 10 000 connect/disconnect cycles for compliance with this part of ISO 14469. In addition, all nozzles will be tested according to the following frequency use classifications, as applicable: 1) Class A Nozzle, specifying high frequency use, with a cycle life of 100 000 cycles and equating to approximately 100 fills per day for three years; 2) Class B Nozzle, specifying medium frequency use, with a cycle life of 20 000 cycles and equating to approximately 10 fills per day for five years. c) Training Operator training required is in accordance with national requirements.
kSIST FprEN ISO 14469-1:2016



kSIST FprEN ISO 14469-1:2016



INTERNATIONAL STANDARD ISO 14469-1:2004(E) © ISO 2004 – All rights reserved 1 Road vehicles — Compressed natural gas (CNG) refuelling connector — Part 1: 20 MPa (200 bar) connector 1 Scope This part of ISO 14469 specifies CNG refuelling nozzles and receptacles constructed entirely of new and unused parts and materials, for road vehicles powered by compressed natural gas. A CNG refuelling connector consists of, as applicable, the receptacle and its protective cap (mounted on the vehicle) and the nozzle. This part of ISO 14469 is applicable only to such devices designed for a service pressure of 20 MPa (200 bar), identified by the code B200, to those using CNG in accordance with ISO 15403 and having standardized mating components, and to connectors that prevent natural gas vehicles from being fuelled by dispenser stations with service pressures higher than that of the vehicle, while allowing them to be fuelled by stations with service pressures less than or equal to the vehicle fuel system service pressure. NOTE All references to pressures, given in megapascals and bar (1 bar = 0,1 MPa = 105 Pa; 1 MPa = 1 N/mm2) are to be considered gauge pressures, unless otherwise specified. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 188:1982, Rubber, vulcanized — Accelerated ageing or heat-resistance tests ISO 1817:1985, Rubber, vulcanized — Determination of the effect of liquids ISO 9227:1990, Corrosion tests in artificial atmospheres — Salt spray tests ISO 15403, Natural gas — Designation of the quality of natural gas for use as a compressed fuel for vehicles ISO 15501-1, Road vehicles — Compressed natural gas (CNG) fuel systems — Part 1: Safety requirements 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 dry air air with moisture content such that the dew point of the air at the required test pressure is at least 11 °C below the ambient test temperature kSIST FprEN ISO 14469-1:2016



ISO 14469-1:2004(E) 2 © ISO 2004 – All rights reserved 3.2 hydrostatic pressure pressure to which a component is taken to verify the structural strength of the component 3.3 working pressure maximum pressure that a CNG refuelling connector can be expected to withstand in actual service 3.4 service pressure settled pressure of 20 MPa (200 bar) at a uniform gas temperature of 15 °C 3.5 positive locking means feature which requires actuation of an interlocking mechanism to allow connection/disconnection of the nozzle from the receptacle 3.6 CNG refuelling nozzle device which permits quick connection and disconnection of fuel supply hose to the CNG receptacle in a safe manner 3.7 CNG refuelling receptacle receptacle device connected to a vehicle or storage system which receives the CNG refuelling nozzle and permits safe transfer of fuel 3.8 CNG refuelling connector connector joined assembly of CNG refuelling nozzle and receptacle 4 General construction requirements 4.1 CNG refuelling nozzles (hereafter referred to as CNG nozzles) and receptacles (hereinafter both also referred to as devices) manufactured in accordance with this part of ISO 14469 shall be designed in accordance with reasonable concepts of safety, durability and maintainability. 4.2 CNG nozzles and receptacles shall be well fitted and manufactured in accordance with good engineering practice. All construction requirements may be met by either the construction specified in this part of ISO 14469 or another construction that gives at least equivalent performance. 4.3 CNG nozzles and receptacles shall be =designed to minimize the possibility of incorrect assembly, =designed to be secure against displacement, distortion, warping or other damage, and =constructed to maintain operational integrity under normal and reasonable conditions of handling and usage. 4.4 CNG nozzles and receptacles shall be manufactured of materials suitable and compatible for use with CNG at the pressure and the temperature ranges to which they will be subjected (see Clause 1). The minimum temperature range shall be selected by the manufacturer between the following ranges: −40 °C to 85 °C −20 °C to 120 °C kSIST FprEN ISO 14469-1:2016



ISO 14469-1:2004(E) © ISO 2004 – All rights reserved 3 4.5 CNG nozzles and receptacles constructed of brass shall use brass alloys with a copper mass content u 70 %. This will ensure proper material compatibility with all the constituents of natural gas. 4.6 Separate external three-way valves shall be constructed and marked so as to indicate clearly the open, shut and vent positions. 4.7 CNG nozzles and receptacles shall be operated either to connect or disconnect without the use of tools. 4.8 The receptacle shall be mounted on the vehicle in accordance with ISO 15501-1. 4.9 Jointing components shall provide gas-tight sealing performance. 5 Nozzles 5.1 Nozzles shall be one of the three types according to a), b) and c). See also Annex A. a) Type 1 is a nozzle for use with dispensing hoses that remain fully pressurized at dispenser shutdown. The nozzle shall not allow gas to flow until a positive connection has been achieved. The nozzle shall be equipped with an integral valve or valves, incorporating an operating mechanism which first stops the supply of gas and safely vents the trapped gas before allowing the disconnection of the nozzle from the receptacle. The operating mechanism shall ensure that the vent valve is in the open position before the release mechanism can be operated and that the gas located between the nozzle shut-off valve and the receptacle check valve is safely vented prior to nozzle disconnection (see 10.2). b) Type 2 is a nozzle for use with dispensing hoses that remain fully pressurized at dispenser shutdown. A separate three-way valve connected directly, or indirectly, to the inlet of the nozzle is required to safely vent trapped gas prior to nozzle disconnection. The nozzle shall not permit the flow of gas if unconnected. Venting is required prior to disconnection of the nozzle (see 10.2). c) Type 3 is a nozzle for use with dispensing hoses which are automatically depressurized — 0,5 MPa (5 bar) and below — at dispenser shutdown (see 10.2). In addition, nozzles shall be classified in terms of cycle life as follows: =Class A, specifying high frequency use, with a cycle life of 100 000; =Class B, specifying low frequency use, with a cycle life of 20 000. 5.2 Venting or de-pressurization of all nozzle types is required prior to disconnection. Disconnection of all nozzles shall be able to be accomplished in accordance with 10.2. 5.3 The method for attaching the nozzle to the fuel dispensing system hose shall not rely on the joint threads between the male and female threads for sealing (e.g. conical threads). 5.4 The three-way valve exhaust port of Type 1 and Type 2 nozzles shall be protected from the ingress of foreign particles and fluid which would hamper the operation of the valve. 5.5 The portions of a nozzle which are held by the user for connection or disconnection may be thermally insulated. 5.6 A Type 1 nozzle shall bear a marking in accordance with Clause 9, if necessary indicating the direction of the open and shut operation of the actuating mechanism. 5.7 The interface surface of the nozzle shall be constructed of material having a hardness > 75 Rockwell B (HRB 75) and shall be non-sparking and conductive (see 10.11.5 and 10.15). The exposed surfaces of the nozzles shall be made of non-sparking materials (see 10.11.5 and 10.15). 5.8 Nozzles shall comply with the performance requirements of Clause 10 to ensure interchangeability. kSIST FprEN ISO 14469-1:2016



ISO 14469-1:2004(E) 4 © ISO 2004 – All rights reserved 6 Standard receptacle dimensions A receptacle shall comply with the design specifications shown in Figure 1. Dimensions in millimetres Surface roughness u Ra 3,2 µm
Key
This area shall be kept free of all components. 1 Sealing surface equivalent to No. 110 O-ring of dimensions: 9,19 mm ± 0,127 mm ID 2,62 mm ± 0,076 mm width Sealing surface finish: 0,8 µm to 0,05 µm Material hardness: 75 Rockwell B (HRB 75) minimum a Minimum length of the receptacle which is clear of provisions for attachment of receptacle or protective caps. Figure 1 — B200 receptacle kSIST FprEN ISO 14469-1:2016



ISO 14469-1:2004(E) © ISO 2004 – All rights reserved 5 7 Receptacles 7.1 Receptacles shall comply with Clauses 1 to 10 and shall be evaluated using at least two different test nozzles, each nozzle representing a different locking technology. The failure of any test conducted with the receptacle and nozzle test samples shall constitute a failure of the submitted receptacle, unless the manufacturer can prove the problem was caused by the test nozzle. 7.2 Receptacle designs which employ means, on the back diameter as shown in Figure 1, to accommodate mounting, or for mounting accessories or marking purposes, shall not have such means extend beyond the back diameter dimensions of the profile as specified by Figure 1, as applicable. Acceptable means include wrench flats, dust cap anchoring grooves, use of hex stock, undercutting for marking, and threads for pressure-tight caps. Receptacle designs shall not compromise the interchangeability requirements specified in Annex C. 7.3 The receptacle shall be equipped with an internal check valve to prevent the escape of gas. The check valve shall be of the non-contact type, opening by differential pressure only. 7.4 The method for attaching the receptacle to the vehicle fuel system shall not rely on the joint between the male and female threads for sealing, such as conical threads. 7.5 The interfacing surface of the receptacle shall be constructed of material having a hardness > 75 Rockwell B (HRB 75) and shall be non-sparking and conductive (see 10.11.5 and 10.15). The exposed surfaces of devices shall be made of non-sparking materials (see 10.11.5). 7.6 Receptacles shall have a means to prevent the ingress of fluids and foreign matter. 7.7 The function specified in 7.6 may also be met by either a protective cap (see 10.4) or a pressure-tight protective cap (see 10.16). 7.8 The receptacle shall have provisions to be firmly attached to the vehicle and shall comply with applicable abnormal load tests (see 10.7). 7.9 The receptacle shall not be installed in an area in which the temperature exceeds 85 °C. 7.10 Receptacles shall have a cycle life of > 10 000 cycles. 8 Instructions 8.1 Information required under this clause for instructions and provisions to be specified shall be given in an easily understood form. 8.2 Special tools required for connection of receptacles to tubing and assembly and disassembly of three-way valve parts shall be clearly identified in the instructions. 8.3 The manufacturers of receptacles, nozzles and three-way valves shall provide clear and concise printed instructions and diagrams in a form that can be easily understood and adequate for a) proper field assembly, b) installation, c) maintenance, d) replacement of components as appropriate, kSIST FprEN ISO 14469-1:2016



ISO 14469-1:2004(E) 6 © ISO 2004 – All rights reserved e) safe operation by all users, f) suitability and use, and g) storage and handling. 9 Marking 9.1 Information required under this clause to be marked shall be in an easily understood form. Marking should be embossed, cast, stamped or otherwise formed in the part. This includes markings baked into an enamelled surface. 9.2 Nozzles and receptacles shall bear the following information: a) manufacturer's or dealer's name, trademark or symbol; b) model designation; c) B200; d) applicable type and class (see 5.1). 9.3 Nozzles and receptacles shall each bear a date code marking. The four-digit date code marking shall consist of at least four adjacent digits determined as follows. a) The first and second digits shall indicate the calendar year in which the nozzle, receptacle or three-way valve was manufactured (e.g. 96 for 1996, 00 for 2000). b) The third and fourth digits shall indicate the week in which the nozzle, receptacle or three-way valve was manufactured (e.g. 03 for the third week of the year). For the purpose of this marking, a week shall begin at 00:01 h on Sunday and end at 24:00 h on Saturday. A date code may be used for more than one week. However, it shall not be used for more than four consecutive weeks, or for more than two weeks into the next calendar year. When a four-digit date code is not practical, the manufacturer shall submit a plan acceptable to the certifying agency which will outline means of establishing the date of manufacture so that it is traceable to the purchaser. Additional numbers, letters or symbols may follow the four digit number specified in a) and b). If additional numbers are used, they shall be separated from the date code. 9.4 Marking to identify this part of ISO 14469 shall be provided for each system. This marking may be located on the package or on a notice placed inside the package in which the device is shipped. 10 Tests 10.1 General requirements The nozzle and receptacle tested shall be of the receptacle and nozzle designs specified in Clauses 1 to 9. Unless otherwise stated, a) tests shall be conducted at room temperature (20 ± 5) °C, b) all pressure or leak tests shall be conducted with dry air or dry nitrogen, and c) devices shall be conditioned to attain equilibrium conditions. kSIST FprEN ISO 14469-1:2016



ISO 14469-1:2004(E) © ISO 2004 – All rights reserved 7 Type 2 nozzles shall be tested in series, with either a three-way valve or some other means to independently pressurize and vent the nozzle. The three-way valve shall not affect the temperature, durability or flow characteristics of the nozzle. Failure of the three-way valve shall not constitute failure of the nozzle. A three-way valve supplied for utilization with a Type 2 nozzle shall be evaluated separately. Nozzle tests shall be done with the test fixtures, specified in Annex C, as applicable. A new receptacle test sample shall be used for each nozzle test. The failure of any test conducted with the nozzle and receptacle test sample shall constitute a failure of the nozzle design. 10.2 User interface The appearance of the nozzle and receptacle shall be such as to clearly suggest the proper method of use. It shall not be possible to deliver gas using Type 1 nozzles unless the nozzle and receptacle are connected properly and positively locked. Upon disconnection, Type 1, 2 and 3 nozzles shall stop the flow of gas. No hazardous condition shall result from disconnection. Type 3 nozzles shall be under a pressure of 0,7 MPa (7 bar) during this test. When the contained pressure is less than or equal to 0,7 MPa (7 bar), all nozzles shall be capable of being disconnected with forces or torques not exceeding 225 N or 7 N⋅m. The disconnection force/torque shall be applied in a direction that tends to unhook and release the nozzle. The force/torque shall be applied to the unhooking/release actuator. The torque shall be applied through axis rotation of the nozzle handle equal to the exterior handling surface of the nozzle uncoupling mechanism and in a direction such that the nozzle tends to unhook and be released. On depressurized devices, the axial force to connect and lock or unlock and disconnect the device shall be u 90 N. On a positive locking device that incorporates a rotary locking means, the torque to lock or unlock the locking means shall not exceed 1 N⋅m for a device having a diameter of u 25,4 mm or smaller and 1,7 N⋅m for a device having a diameter > 25,4 mm. The minimum force to facilitate disconnection at pressures of 6,25 MPa (62,5 bar) or more, shall be 2,5 times the force when depressurized (Types 1 and 2) or 0,7 MPa (7 bar) (Type 3). Type 1 nozzles shall be tested with the vent port plugged. 10.3 Impact resistance A nozzle shall be connected to a 4,6 m length of 9,5 mm internal diameter (ID) refuelling hose, conditioned at −40 °C for 24 h and then dropped 1,8 m onto a concrete floor as shown in Figure 2. The nozzle shall be dropped ten times, then pressurized to 20 MPa (200 bar) and subjected to ten additional drops. Following this, the nozzle shall be capable of normal connection and disconnection to the receptacle. In addition, the nozzle shall comply with all leakage tests specified in this part of ISO 14469 (see 10.5). 10.4 Receptacle protective caps There shall be no permanent distortion or damage to any receptacle protective cap when tested as follows. A solid steel ball with a diameter 50 mm shall be dropped from a height of 300 mm striking the protective cap installed on the receptacle. The test shall be conducted at −40 °C and at 85 °C at a minimum of five points of impact most likely to cause damage to the receptacle and the protective cap. kSIST FprEN ISO 14469-1:2016



ISO 14469-1:2004(E) 8 © ISO 2004 – All rights reserved Dimensions in metres
Key 1 suitable support 2 refuelling hose (9,5 mm diameter) 3 nozzle 4 concrete floor Figure 2 — Impact resistance test arrangement 10.5 Leakage at room temperature 10.5.1 Nozzle A nozzle, whether coupled or uncoupled, shall be either bubble-free for 1 min during the leak test or have a leak rate of < 20 cm3/h (normalized), when tested as follows. Tests shall be conducted at 0,5 MPa (5 bar), 30 MPa (300 bar) and then again at 0,5 MPa (5 bar). Pressurized air or nitrogen shall be applied to the inlet of the coupled (or uncoupled) device. The external body shall then be checked for bubble-tight leakage using immersion in room temperature water. All connectors shall be checked for leakage from the time of connection, through full fuel flow, to the time of disconnection. If there are no bubbles for a period of 1 min, the sample passes the test. If bubbles are detected, then the leak rate shall be measured by either a vacuum test using helium gas (global accumulation method) or an equivalent method. 10.5.2 Receptacle The receptacle check valve shall be either bubble-free for 1 min during the leak test or have a leak rate of < 20 cm3/h (normalized) when tested as follows. Tests shall be conducted at 0,5 MPa (5 bar), 30 MPa (300 bar) and then again at 0,5 MPa (5 bar). The receptacle shall be connected to a pressure vessel capable of safely accommodating the specified test pressures. The receptacle and pressure vessel shall then be pressurized. Once the pressure vessel has reached the specified test pressure, the upstream portion of the receptacle shall be quickly depressurized and the receptacle check valve checked for leakage. kSIST FprEN ISO 14469-1:2016



ISO 14469-1:2004(E) © ISO 2004 – All rights reserved 9 10.6 Valve operating handle If a nozzle is equipped with a valve operating handle, it shall be capable of withstanding double the manufacturer's specified operating torque or force, without damage to the operating handle or the operating handle stops. This test with the torque or force applied in both the opening and closing directions shall be performed a) with the nozzle properly connected to a receptacle, and b) with the nozzle intentionally misaligned relative to the receptacle. 10.7 Abnormal loads 10.7.1 General The connected nozzle and receptacle shall be subjected to the following abnormal loads for a period of 5 min in service. These tests are to be conducted separately: a) pulls a along the longitudinal axis of the nozzle or receptacle; b) moments b applied in a worst-case manner. The nozzle and receptacle shall be able to withstand abnormal loads of a = 1 350 N and b = 120 N⋅m without distortion or damage, and of a = 2 700 N and b = 240 N⋅m without becoming so damaged as to leak. The load and moment arm shall be measured about a point 41 mm from the front of the receptacle to the hose inlet of the nozzle (see Figure 3). After completing these tests, the receptacle shall comply with 10.5. Dimensions in millimetres
Key 1 receptacle 2 abnormal load reference 3 moment 4 nozzle Figure 3 — Abnormal load test 10.7.2 Test in the unpressurized condition The receptacle test fixture and nozzle shall not be pressurized during the abnormal load tests. kSIST FprEN ISO 14469-1:2016



ISO 14469-1:2004(E) 10 © ISO 2004 – All rights reserved The receptacle shall be mounted as a cantilever to a supporting member in accordance with the manufacturer's instructions. For the purposes of this test, the supporting member shall be capable of withstanding the specified loads without displacement or deflection. The loads applied and the device's ability to resist damage shall be as specified in 10.7. After completion of the tests, the receptacle shall comply with 10.5. 10.7.3 Test in the pressurized condition The receptacle test fixture and nozzle shall be pressurized to 25 MPa (250 bar) during the abnormal load tests. The “
...