Sub-Committee of Experts on the Transport of Dangerous Goods

Forty-first session

Geneva, 25 June – 4 July 2012

Item 5 (a) of the provisional agenda

Miscellaneous proposals of amendments to the Model Regulations

on the Transport of Dangerous Goods: packaging

References to ISO Standards – Section 6.2.2

Submitted by the International Organization for Standardisation (ISO)

 Introduction

1. This paper proposes to introduce a new standard for the design construction and testing of UN bundles of cylinders and to replace the existing referenced version of ISO 11114-1 with the revised version published in 2012.

The standards concerned are:

ISO 10961:2010 Gas cylinders – Cylinder bundles – Design, manufacture, testing and inspection; and

ISO 11114-1:2012      Gas cylinders – Compatibility of cylinder and valve materials with gas contents – Part 1: Metallic materials

Proposal 1

 Justification

2. The standard ISO 10961:2010 fills a gap in the provisions for UN pressure receptacles which, although containing provisions for bundles of cylinders, has no standard referenced to enable construction. This standard gives type approval tests that ensure that the bundle of cylinders with its enclosing frame is robust enough to survive dropping and other mishandling in transport without leaking. The sub section on marking refillable pressure receptacles, 6.2.2.7, is applicable to the cylinders within the bundle, but is inappropriate for the bundle as a whole. The standard gives requirements for marking, but in common with other pressure receptacles, these requirements should be in the provisions of the Regulations, and marking requirements are included in this proposal for the Model Regulations.

This standard sets a higher standard, i.e. stronger frame and cylinder securing arrangements, than designs used national transport in many countries. The proposers believe that a robust design is appropriate for multi-modal and international journeys.

 Proposed text

3. Amend the text of section 6.2.2 as follows.

After 6.2.2.1.5 insert a new paragraph.

“6.2.2.1.6  The standard shown below applies for the design, construction and initial inspection and test of UN bundles of cylinders. Each cylinder in     a  UN bundle of cylinders shall be a UN cylinder complying with the requirements of 6.2.2. The inspection requirements related to the conformity assessment system and approval for bundles of cylinders shall be in accordance with 6.2.2.5.

6.2.2.7 Amend the note to read as follows, (new text shown underlined):

“NOTE:    Marking requirements for UN metal hydride storage systems are given in 6.2.2.9 and marking requirements for UN bundles of cylinders are given in 6.2.2.10.”

Delete 6.2.2.7.9 completely.

Add the following new 6.2.2.10:

"6.2.2.10 Marking of bundles of cylinders

6.2.2.10.1           Individual cylinders in a bundle of cylinders shall be marked in accordance with 6.2.2.7.

6.2.2.10.2           Refillable UN bundles of cylinders shall be marked clearly and legibly with certification, operational, and manufacturing marks.  These marks shall be permanently affixed (e.g. stamped, engraved, or etched) on a plate permanently attached to the frame of the bundle of cylinders.  Except for the UN packaging symbol, the minimum size of the marks shall be 5 mm.  The minimum size of the UN packaging symbol shall be 10 mm.

6.2.2.10.3  The following marks shall be applied:

(a)      The certification marks specified in 6.2.2.7.2 (a), (b), (c), (d)        and (e);

      (b)      The operational marks specified in 6.2.2.7.3 (f), (i), (j) and the total of the mass of the frame of the bundle and all permanently attached parts (cylinders, manifold, fittings and valves). Bundles intended for the carriage of UN 1001 acetylene, dissolved and UN 3374 acetylene, solvent free shall bear the tare mass as specified in clause B.4.2 of ISO 10961:2010; and

(c)      The manufacturing marks specified in 6.2.2.7.4 (n), (o) and,        where applicable, (p).

6.2.2.10.4           The marks shall be placed in three groups:

(a)      The manufacturing marks shall be the top grouping and shall   appear consecutively in the sequence given in 6.2.2.10.3 (c);

(b)      The operational marks in 6.2.2.10.3 (b) shall be the middle          grouping and the operational mark specified in 6.2.2.7.3 (f) shall be immediately preceded by the operational mark specified in 6.2.2.7.3 (i) when the latter is required;

(c)      Certification marks shall be the bottom grouping and shall         appear in the sequence given in 6.2.2.10.3 (a).".

Proposal 2

Justification

4.  ISO 11114-1:1997 is referenced in the five places places in the Model Regulations.  This standard gives information on the compatibility of gases and the materials most commonly used for cylinders and their valves. It was criticised following the failure of an aluminium cylinder in Dubai.  The 1997 version of the standard classifies combinations of gas and materials as either “acceptable” or “not recommended”.  “Not recommended” was defined as “a material/gas combination that may not be safe.  Such combinations can be used where they have been assessed and authorized by a competent person who specifies the conditions of use”.

This was thought to be too equivocal and could encourage fillers to ignore the requirements of the regulations.  The 2012 version of the standard now classifies combinations of gas and material as either “acceptable” or “not acceptable”.  “Not acceptable” is defined as ‘material/single gas combination that is not safe under all normal conditions of use’.  The standard therefore has a closer conformity to the regulations.

The new standard also has new advice on the compatibility of mixtures of gases.

 Proposed amendment

5.  Replace “ISO 11114-1:1997” with “ISO 11114-1:2012” in the following paragraphs: 4.1.6.1.2, 6.2.2.2, 6.2.2.7.4 (p), 6.2.2.9.2 (j) and 6.7.5.2.4 (a).

联合国危险货物运输专家和全球化学品统一分类和标签制度专家委员会

危险货物运输专家分委员会

第四十一次会议

日内瓦, 2012年6月25日-7月4日
议程第5 (a)项

对规章范本的各种修正草案：包装

参照ISO标准-6.2.2部分

由国际标准化组织(ISO)提交

介绍

1.本文件建议引进一个关于联合国气瓶集束设计结构和测试的新标准并以2012年出版的修订版本替代现行ISO 11114-1的参照版本。

标准涉及：

ISO 10961:2010 气瓶－气瓶集束－设计、制造、试验和检查；和

ISO 11114-1:2012       气瓶－气瓶和阀门材料与气体内装物相容性－第1部分：金属材料

提议1

理由

2.   标准ISO 10961:2010填补了联合国压力容器规定尽管包含了气瓶集束规定，但是没有参照标准能够解释的空白。本标准提供了型式批准试验保证气瓶集束及框架足够坚固来通过跌落和其他运输中的违规操作而不泄露。6.2.2.7，可再充装压力容器标记，适用于集束中的气瓶，但是不适用于整体集束。本标准提供了标记的要求，但和其他压力容器一样，这些要求应该在规章范本中，本提案包括了对规章范本增加标记要求。

本标准设定了更高的标准，如比许多国家国内运输更坚固的框架和气瓶安全设计。提议人相信坚固的设计更合适用于多式联运和国际运输。

提议文本

3.  修订6.2.2部分如下：

在6.2.2.1.5后插入新段落。

“6.2.2.1.6  下列标准适用于联合国气瓶集束的设计、制造及首次检查和试验。集束中的每个气瓶应符合6.2.2的要求。有关合格评估制度的检查要求和批准，须按6.2.2.5 进行：

6.2.2.7注释修订如下，（新文本如下划线所示）：

 “注:        联合国金属氢贮存系统的标记要求，见6.2.2.9。联合国气瓶集束的标记要求，见6.2.2.10。”

完全删除6.2.2.7.9。

增加以下新段落6.2.2.10:

"6.2.2.10 气瓶集束的标记要求

6.2.2.10.1           集束内的单个气瓶应按6.2.2.7要求标记。

6.2.2.10.2           可再充装的联合国气瓶集束必须清楚、易读地标上核证、使用和制造标记。这些标记必须耐久地标在 (例如打印、雕刻或蚀刻) 气瓶集束上。除联合国包装符号外，标记的最小尺寸必须为5 毫米。联合国包装符号的最小尺寸必须为10 毫米。

6.2.2.10.3  必须使用下列标记：

(a)      在6.2.2.7.2 (a), (b), (c), (d) 和 (e)中规定的核证标记；

      (b)      在6.2.2.7.3 (f), (i), (j)中规定的操作标识及集束框和所有永久性附加部分（气瓶，管道、配件和阀门）的总重。用来运输UN1001(溶解乙炔)和UN3374(乙炔，无溶剂)的集束应符合ISO 10961:2010中B.4.2条款的包装重量要求；和

(c)      在6.2.2.7.4 (n), (o) 和 (p)（如适用）中规定的制造商标记。

6.2.2.10.4           上述标记必须分成三组列出：

(a)      制造标记是放在最上面的一组，必须按6.2.2.10.3 (c) 所给的顺序连续列出；

(b)      6.2.2.10.3 (b)中的操作标记应放在中间一组，如果要求有6.2.2.7.3 (i)规定的操作标记，6.2.2.7.3 (f) 中规定的操作标记应须紧接在其之后；

(c)      核证标记是最下面的一组，必须按6.2.2.10.3 (a) 所给的顺序列出。”。

 提议2

 理由

4.  ISO 11114-1:1997在规章范本中引入5处。本标准提供了关于最常用气瓶和阀门材料和气体的相容性信息。迪拜铝气瓶的事故一直被人指责。1997版标准将气体和材料的组合分类为“可接受”或“不推荐”。“不推荐”定义为“一种材料/气体的组合也许不安全。”这样的组合如果经过规定使用条件的主管人员评估并授权后可以使用。

这一点被认为过于模糊且能够鼓励填充者忽略规章的要求。2012版标准现在将气体和材料的组合分类为“可接受”或“不接受”。“不接受”定义为“材料/单一气体的组合在所有通常使用条件下都不安全”。因此该标准更符合规章。

新标准也有一些在气体混合物相容性方面的新建议。

提议的修订

5. 在以下段落用 “ISO 11114-1:2012” 替换“ISO 11114-1:1997”：4.1.6.1.2，6.2.2.2， 6.2.2.7.4 (p)， 6.2.2.9.2 (j)和6.7.5.2.4 (a)。