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Current Status of Discussion on New Standards for High-Pressure Hydrogen Containers in Japan

This article discusses the current status of the discussion on new standards for high-pressure hydrogen containers in Japan, focusing on the development of draft Japanese standards and plans for international harmonization. The new standards aim to guarantee safety, reduce weight and cost, and ensure durability strength. The proposed changes include increasing the maximum working pressure from 35 MPa to 70 MPa. International collaboration with ISO, SAE, and other organizations is planned to contribute to the development of a draft Global Technical Regulation (GTR).

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Current Status of Discussion on New Standards for High-Pressure Hydrogen Containers in Japan

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  1. SGS-4-05 Current Status of Discussion on New Standards for High-Pressure Hydrogen Containers in Japan Japan Automobile Standards Internationalization Center (JASIC) 24-26 September, 2008 UN/ECE/WP29/AC3 GRSP HFCV-SGS4th meeting

  2. Current Status of Discussion on New Standards for Containers * Japan has been discussing the new standards according to the original schedule. In future, Japan plans * To develop the draft Japanese standards by Oct. 2008 by focusing on standardization in Japan, with a view to issuing the standards in Mar. 2010 (a change to be made to the standards: from the current 35 MPa to 70 MPa); * To shift the focus of activities on international harmonization after completion of development of the draft Japanese standards in Oct. 2008 so that Japan can contribute to development of the draft GTR during 2009 in collaboration with ISO, SAE, etc.

  3. Current standard applied New standard applied (Inner volume the same; CFRP reduced) Outline of New Standard for Containers New Standard Current (JARI S 001) ・Safety guaranteed ・Lighter weight and Lower cost (reduced CFRP and used lower grade) -Maximum Working Pressure 70 MPa -Durability strengthguaranteed in consideration ofVehicles Usage and Lifetime. = Sequential Loading Test (scratch/over fill/low and high temperatures/stress rupture/chemical exposure/fatigue/ proof pressure/burst) -Burst Pressure Working Pressure reduced (After Durability Test) -Fatigue Life cycles reduced -Expansion of materials selection future standardization of materials evaluation method. -Maximum Working Pressure 35 MPa -Strength guaranteed in a brand-new cylinder = Independent Loading Tests -Burst Pressure > Working Pressure x 2.25 -Fatigue Life > 11,250 Cycles -Materials Designated (A6061-T6,SUS316L)

  4. Draft Schedule with International Harmonization at Sep.2008 CY2007 CY2008 CY2009 CY2010 CY2011 CY2012 Japanese New Standards Data Acquisition of metal materials Technical Norms for material Data Acquisition for container@JARI Issue(Step-2) Deliberations Draft Issue(Step-1) Data Acquisition@PLI SAE J2579 Collaborate with SAE using each data-based Propose to SAE, ISO, gtr Deliberations TIR Study Proposals Issue ISO 15869 Issue? 2nd DIS Rejected 3nd DIS Rejected Harmonization gtr Establishment of gtr Issue

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