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来自： 新加坡
本帖最后由 Remus 于 2010-2-27 15:57 编辑
1# jhx009
找资料应该自己去找的，google，baidu又不收费。又不是绝版的东西~~等着别人送上门，还放着“规范探讨”的头衔。
FSS Code Chinese.pdf
(135.69 KB, 下载次数: 327)
FSS Code English.pdf
(251.83 KB, 下载次数: 276)
帮你从国防科技论坛载的，谢谢longyang2010 http://bbs.81tech.com/read.php?tid-130116-page-1.html
顺便发一下09的通函，我没用过这个规范，适用与否，自己去分辨了。
C C S 通 函
Circular
中国船级社
技术处(2009年)通函第 021 号总第 350号
2009年7月9日（共 14页）
发：总部各有关业务处室、各审图中心、各分社（办事处）、船厂、船东、有关
的试验机构、设计院、产品厂
IMO MSC206(81)决议通过的FSS Code 第5章 固定式气体灭火
系统修正案内容和相关的审图和检验发证要求
1、前言
在2006 年5 月18日国际海事组织海上安全委员会 81 次会议上，通过了第 206
号关于消防安全系统规则（FFS Code）第5章 固定式气体灭火系统修正案的决
议。本通函归纳了主要的修订内容，
明确了该修正案执行中应遵循的检验
和发证
要求。根据规定，该修正案于
2010 年7 月1日起生效，即自该日起建造的国际
航行船舶，包括其相关的产品和装置
应满足修正案要求。本通函附件给出
了修正
案的中、英文本。
2 、定义
建造船舶 系指SOLAS公约中定义的安放龙骨或处于相似建造阶段的船舶；
3 、修改和新增内容概要
在本通函附件的修正案中文本中，我们用黑体字表示了修改和新增的内容。修改
和新增的内容的概要介绍如下：
1） 在固定式气体灭火系统被要求保护一个以上处所时，系统应设常闭的控制
阀，通过这些控制阀将灭火剂直接施放到适当处所（2.1.1）;
2） 存放灭火剂容器应按主管机关认可的压力规则进行设计,
推荐ISO标准
(2.1.1.4);
3） 灭火系统应采用主管机关接受的计算方法计算流量(2.1.2.1);
4） 要求封闭式管路区段设置压力释放阀 (2.1.2.4);
5） 对系统排放管、附件和喷嘴的材料提出了要求(2.1.2.60;
6） 排放管应具备进行畅通性试验的条件
(2.1.2.6);
7） 系统报警应能与其他报警相区分(2
.1.3.2);
8） CO2 灭火系统在安装后应进行畅通试验和报警装置的功能试验(2.2.3) ;
9） 新增2.2.4节 低压二氧化碳灭火系统。
4、图纸审查和检验发证
1）2010 年7 月1日及以后建造船舶的固定式气体灭火系统的审图，应依据
MSC206（81）通过的对FSS Code第5章的修正案进行，并特别注意本通函2
段所列内容。
2）从本通函生效之日起，在进行固定气体灭火系统产品检验评审时，务必要求
申请方明确用于船舶的安放龙骨日期 。对于 2010 年7月1 日及以后建造
船舶
的固定式气体灭火系统，应重新按
照新的要求进行审图、认可及检验。认可
证书和产品证书中须注明符合
MSC206（81）的要求。
3）执行建造检验的现场验船师在对 2010年7
月1 日及以后建造船舶的固定式气
体灭火系统进行检验时，应注意核对
产品证书中是否注明符合
MSC206（81）。
未注明符合 MSC206（81）的固定气体灭火系统，应禁止装船使用。除了应注
意核查系统布置是否满足修正案要求外，还应对FSS Code第5章2.2.3条要
求的系统畅通性试验和报警功能试验给予特别关注。
4）对于 2010年7月1 日及以后建造
CCS级船舶，如其固定式气体灭火系统采用
低压CO2灭火系统时，应同时满足FSS Code第5章2.2.4条和我社规范第6
篇相关要求。
5、生效
本通函自下发之日起生效。新的产品
和建造检验须知改版前，产品检验和
建造检
验暂时按照本通函规定进行。
MSC.206(81) 决议
(2006 年 5 月 18 日通过 )
通过《国际消防安全系统规则（FSS 规则）》修正案
海上安全委员会，
忆及国际海事组织公约第 28(b) 条关于本委员会的职能，
注意到本委员会MSC.98(73) 决议通过的《国际消防安全系统规则》（以下简称"FSS规
则"），根据《1974 年国际海上人命安全公约》(以下简称"本公约") 第II-2 章已成为
强制性文件，
还注意到本公约第VIII(b) 条和第II-2/3.22 条关于FSS规则修正程序的规定，
在其 81届会议上审议了按本公约第VIII(b)(i) 条提出和分发的FSS规则修正案，
1．按本公约第VIII(b)(iv) 条规定，通过FSS规则修正案，其文本载于本决议附件；
2 ．按本公约第VIII(b)(vi)(2)(bb) 条规定，决定上述修正案于 2010 年 1 月 1 日应视为已
被接受，除非在此日期之前，有三分之一以上的本公约缔约国政府或拥有商船合计吨
位数不少于世界商船总吨数 50%的缔约国政府通报其反对该修正案；
3 ．请各缔约国政府注意，按本公约第VIII(b)(vii)(2)条规定，该修正案在按上述 2 被接
受后，应于 2010年7月 1 日生效；
4．要求秘书长按照本公约第VIII(b)(v) 条规定，将核准无误的本决议以及附件中修正案
文本的副本分发给所有本公约缔约国政府；
5 ．进一步要求秘书长将本决议及其附件的副本分发给非本公约缔约国政府的本组织成
员。
附件
国际消防安全系统规则（FSS 规则）修正案
第 5 章
固定式气体灭火系统
第5 章的现有文本由下列替代：
" 1 适用范围
本章详细规定了公约第II-2 章所要求的固定式气体灭火系统的技术要求。
2 技术要求
2.1 通则
2.1.1 灭火剂
2.1.1.1 若要求灭火剂数量能保护一个以上处所时，则可供使用的灭火剂数量不必
大于被保护的任一处所中所需的最大 数量。该系统应设置常闭控制阀，通过这些阀
门将灭火剂直接施放至适当的处所。
2.1.1.2 当计算灭火剂必需的剂量时，换成自由空气容积的启动空气瓶容积应被加
到机器处所的总容积中。作为替代，可以在安全阀上安装一个直接通向室外大气
的排放管。
2.1.1.3 应备有设施，以便船员能安全地检查容器内的灭火剂数量。
2.1.1.4 存放灭火剂的容器、管路及其相关的受压部件，应在考虑到其位置和营
运中可能遇到的最大环境温度，按主管机关认可的现行压力规则进行设计。1
2.1.2 安装要求
2.1.2.1 灭火剂的分配管路的布置以及喷嘴的设置应能获得均匀的灭火剂分布。应
采用主管机关接受的计算方法计算系统流量。
2.1.2.2 除主管机关另有准许外，储存蒸汽以外的灭火剂所需的受压容器，应按公
约第II-2/10.4.3 条的要求置于被保护处所的外面。
2.1.2.3 船上应存有该系统的备件并使主管机关满意。
1
ISO出版物－9809/1：可充装式无缝钢气筒
(设计、构造和试验)；
ISO-3500：无缝钢二氧化碳筒。对于船上的固定式灭火装置，具体说明船上固定式灭火装置使用的无缝
钢二氧化碳筒的主要外部尺寸、附属件、充装速率和标记，以促进相互交换能力；
ISO-5923：防火－灭火剂－二氧化碳；
ISO-13769：气筒－印记标记；
ISO-6406：无缝钢气筒的定期检查和试验；
ISO-9329，第 1部分：压力用无缝钢管－技术交付条件－第 1 部分：具有特定室温性能的非合金钢；
ISO-9329，第 2部分：压力用无缝钢管－技术交付条件－第 2 部分：具有特定升温性能的非合金钢和合
金钢；
ISO-9330，第 1部分：压力用焊接钢管－技术交付条件－第 1 部分：具有特定室温性能的非合金钢；
ISO-9330，第 2部分：压力用焊接钢管－技术交付条件－第 2 部分：具有特定升温性能的电阻和电导焊
接非合金钢管和合金钢管。
2.1.2.4 如阀门的布置导致在管路区段内形成封闭管段时，在这些封闭管段上应配置
压力释放阀，该阀的出口应通向露天甲板。
2.1.2.5 被保护处所中所有排放管、附件和喷嘴应采用熔点温度超过 925 ℃的材料。管
路及其相关附件应有足够的支撑。
2.1.2.6 应在排放管路上设有可进行 2.2.3.1 要求的畅通性试验的附件。
2.1.3 系统控制要求
2.1.3.1 输送灭火剂至被保护处所的管子应设有控制阀，并应清楚地标明这些管子
通往的处所。应有适当的措施以防止灭火剂因疏忽而注入任何处所。设有气体灭
火系统的货舱如用作乘客处所时，在运客期间，气体的管子连头应予盲断。管路
可以通过起居处所，条件是这些管子具有足够的厚度，且它们的密性是在安装好
后，通过以不小于5 N/mm2压头的压力试验得以验证。此外，通
过起居处所的管子
只能用焊 接连接，且在这些处所内不应安装有排水口或其他开口。管路不应通过
冷藏处所。
2.1.3.2 对任何滚装处所和通常有人员工作或出入的其他处所，应设有释放灭火剂
的听觉和视觉自动报警装置。听觉报警应位于在所有机器工作的状态下在整个被
保护处所内都能听见的位置，且应通过调节声压或声调使该报警与其他听觉报警
区分开来。预释放报警应自动启动，如通过打开释放舱室的门启动。报警所需的
时间长短应为撤离该处所所需的时间 ，但是无论如何在灭火剂被释放前应不少于
20s。普通货物处所及仅配有局部释放装置的小型处所 (如压缩机房、油漆间等) 不
必配备这种报警。
2.1.3.3 固定式气体灭火系统的控制设施应易于接近和操作简便，且应成组地安装
于尽可能少的处所，其所在位置应不致为被保护处所的火灾所切断。考虑到人员
安全，在每一处所应备有指导该系统操作的说明书。
2.1.3.4 除主管机关准许外，不允许采用自动释灭火剂的装置。
2.2 二氧化碳系统
2.2.1 灭火剂的数量
2.2.1.1 货物处所所备二氧化碳的数量，除另
有规定外，应足以放出体积至少等于
该船受保护的最大货物处所总容积
30％的自由气体。
2.2.1.2 机器处所应备有足够的二氧化碳量，所释放出的自由气体体积至少等于下
列两者中的较大值：
.1 被保护的最大机器处所总容积的40%，此容积算至机舱棚的一个水平面
为止，在这个水平面上，机舱棚的水平面积等于或小于从舱顶至机舱
棚最低部分的中点处水平面积的 40%；或
.2 被保护的最大机器处所（包括机舱棚）总容积的35％。
2.2.1.3 对小于2,000总吨的货船，如其两个或两个以上的机器处所未完全隔开而
被视作一个处所时，上述2.2.1.2 条规定的百分数可分别减小到 35％和 30％。
2.2.1.4 这里所指的二氧化碳自由气体的容积应以0.56 m3/kg计算。
2.2.1.5 机器处所的固定管系应能使85％的气体在2 min内注入该处所。
2.2.2 控制装置
二氧化碳系统应满足下列要求：
.1 应设置两套独立的控制装置，以将二
氧化碳释放至被保护处所，并确保报警
装置的启动。一套控制装置应用于开启安装在将气体输送至被保护处所的管
路上的阀门，另一套控制装置应用于将气体从所储存的容器中排出。应采取
切实可行的措施以确保其按照此顺序操作；和
.2 两套控制装置应布置在一个释放箱内，在该箱的特定部位应设醒目标记。如
果装有控制装置的释放箱上 加锁，用于开启箱子的钥匙应置于设有玻璃面板
的盒子里，该盒子应置放在释放箱附近的明显位置处。
2.2.3 安装试验
系统进行安装、压力试验和检查后，应进行下述试验：
.1 所有管路和喷嘴的畅通性试验；和
.2 报警设备的功能试验。
2.2.4 低压CO
2
系统
如设有低压 CO
2
系统以符合本条要求，下列要求适用。
2.2.4.1 系统控制装置和制冷装置应位于储存耐压容器的同一房间内。
2.2.4.2 额定的液态二氧化碳量应储存在工作压力为 1.8 至 2.2 N/mm2 范围内的容
器内。在容器内正常液体充装量应加以限制，以能提供足够的蒸气空间允许液体在
处于最高储存温度下时可获得比压力 释放阀调定时的更大的膨胀量，但蒸气空间不必
大于容器体积的 95 ％。
2.2.4.3 应设有：
.1 压力表；
.2 高压报警器：不超过释放阀的整定值；
.3 低压报警器：不小于 1.8 N/mm2 ；
.4 具有截止阀的充填容器支管；
.5 排气管；
.6 装在容器上的液态二氧化碳量液位指示仪；和
.7 两个安全阀。
2.2.4.4 两个安全释放阀的布置应使当任一阀关闭时另一阀接通容器。释放阀的
设定应不小于工作压力的 1.1 倍 。每个阀的容量应设计成，在失火
施放时，容器内蒸
气压力升高值不大于调定压力的 20% 。从安全释放阀排出的蒸气应排放到大气中。
2.2.4.5 对永久充装二氧化碳的容器和输出管，应设有隔热绝缘，以便当装置断
电后，在环境温度为 45 ℃且初始压力等于制冷装置的启动压力情况下，安全释放阀在
24 h 内不动作。
2.2.4.6 容器应设有两套专用的完全独立的自动制冷装置，每套制冷装置包括一
台压缩机及其相关的原动机，蒸发器和冷凝器。
2.2.4.7 在海水温度达 32℃和环境温度达 45 ℃时，每一套装置的制冷能量和自动
控制应能在 24 h 连续运转的情况下，保持所规定的温度。
2.2.4.8 每套电动制冷装置应由主配电板汇流排通过独立的馈电线供电。
2.2.4.9 制冷装置的冷却水（如要求）应由至少两台冷却水泵提供，其中一台为
备用泵。备用泵可以是用于其他用途的泵，但运用此泵供应冷却水时，应不会影
响船上其他的重要设备的供水。冷却水应取自不少于二个通海接头，最好一个在
左舷，一个在右舷。
2.2.4.10 由截止阀分隔的每段管子，且管子内压力可能超过任何部件设计压力时，
应设有安全释放装置。
2.2.4.11 当发生下列情况时，中央控制站应发出听觉和视觉报警，或如未设有中
央控制站，按第 II-1/51 条发出听觉和视觉报警：
.1 容器内压力达到 2.2.4.2 规定的上、下限值；
.2 任一制冷装置操作失效；或
.3 容器内的液体达到最低许可液位。
2.2.4.12 如果系统服务于一个以上处所，应设置二氧化碳排放量控制装置，例如
自动定时器或布置在控制位置处的精
确液位显示装置。
2.2.4.13 如设有能自动调节释放到被保护处所内CO
2
量的装置，该装置还应能手动进
行调节。
2.3 蒸汽系统的要求
供给蒸汽的一个或多个锅炉的蒸发量 ，应能每小时对最大受保护处所的总容积按
每0.75 m3至少供给1kg的蒸汽。除了符合上述要求之外，该系统在其他各方面应
由主管机关确定并使其满意。
2.4 利用燃料燃烧生成的气态产物的灭火系统
2.4.1 一般要求
除二氧化碳或2.3 许可的蒸汽外，如船上生产的气体用作灭火剂，该系统应满足
2.4.2 的要求。
2.4.2 系统的要求
2.4.2.1 气态产物
气体应是燃料燃烧产生的一种气态产 物，此气态产物中氧气含量、一氧化碳含量、
腐蚀元素以及在气态产物中的任何固体可燃元素均应降至容许的最低量。
2.4.2.2 灭火系统的容量
2.4.2.2.1 如在固定式灭火系统中使用这种气体作为灭火剂来保护机器处所时，它
应与使用二氧化碳作为灭火剂的固定式灭火系统具有等效的保护作用。
2.4.2.2.2 如在固定式灭火系统中使用这种气体作为灭火剂来保护货物处所时，应
备有足够的数量，以使每小时供给自由气体的容积至少等于最大一个被保护处所
总容积的25%，并应持续供给72 h。
2.5 机器处所和货油泵舱的等效固定式气体灭火系统
等效于2.2 至2.4中规定的固定式气体灭火系统应由主管机关根据本组织制定的指
南2 予以批准。"
2
参见MSC/Circ.848 通函《经修订的 1974 年SOLAS公约用于机器处所和货油泵舱的等效固定式气体灭火系
统认可指南》和MSC/Circ. 1007 通函《1974 年SOLAS公约用于机器处所的等效于固定式气体灭火系统的固
定式烟雾灭火系统认可指南》。
MSC 81/25/Add.1
ANNEX 6
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ANNEX
AMENDMENTS TO THE INTERNATIONAL CODE FOR
FIRE SAFETY SYSTEMS (FSS CODE)
CHAPTER 5
FIXED GAS FIRE-EXTINGUISHING SYSTEMS
The existing text of chapter 5 is replaced by the following:
" 1 Application
This chapter details the specifications for fixed gas fire-extinguishing systems as required
by chapter II-2 of the Convention.
2 Engineering specifications
2.1 General
2.1.1 Fire-extinguishing medium
2.1.1.1 Where the quantity of the fire-extinguishing medium is required to protect more
than one space, the quantity of medium available need not be more than the largest
quantity required for any one space so protected. The system shall be fitted with
normally closed control valves arranged to direct the agent into the appropriate space.
2.1.1.2 The volume of starting air receivers, converted to free air volume, shall be added
to the gross volume of the machinery space when calculating the necessary quantity of the
fire-extinguishing medium. Alternatively, a discharge pipe from the safety valves may be
fitted and led directly to the open air.
2.1.1.3 Means shall be provided for the crew to safely check the quantity of the
fire-extinguishing medium in the containers.
2.1.1.4 Containers for the storage of fire-extinguishing medium, piping and associated
pressure components shall be designed to pressure codes of practice to the satisfaction of
the Administration having regard to their locations and maximum ambient temperatures
expected in service.∗
∗
Publication ISO - 9809/1: Refillable seamless steel gas cylinders (design, construction and testing);
ISO - 3500: Seamless steel CO
2
cylinders. For fixed fire-fighting installations on ships, specifying the principal
external dimensions, accessories, filling ratio and marking for seamless steel CO
2
cylinders used in fixed
fire-fighting installations on ships, in order to facilitate their interchange ability;
ISO - 5923: Fire protection - Fire-extinguishing media - Carbon dioxide;
ISO - 13769: Gas cylinders - Stamp marking;
ISO - 6406: Periodic inspection and testing of seamless steel gas cylinders;
ISO - 9329, part 1: Seamless steel tubes for pressure purposes − Technical delivery conditions -
Part 1: Unalloyed steels with specified room temperature properties;
ISO - 9329, part 2: Seamless steel tubes for pressure purposes − Technical delivery conditions -
Part 2: Unalloyed and alloyed steels with specified elevated temperature properties;
ISO - 9330, part 1: Welded steel tubes for pressure purposes − Technical delivery conditions -
Part 1: Unalloyed steel tubes with specified room temperature properties;
ISO - 9330, part 2: Welded steel tubes for pressure purposes − Technical delivery conditions - Part 2: Electric
resistance and induction welded unalloyed and alloyed steel tubes with specified elevated temperature properties.
MSC 81/25/Add.1
ANNEX 6
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2.1.2 Installation requirements
2.1.2.1 The piping for the distribution of fire-extinguishing medium shall be arranged
and discharge nozzles so positioned that a uniform distribution of the medium is obtained.
System flow calculations shall be performed using a calculation technique acceptable to
the Administration.
2.1.2.2
Except as otherwise permitted by the Administration, pressure containers
required for the storage of fire-extinguishing medium, other than steam, shall be located
outside the protected spaces in accordance with regulation II-2/10.4.3 of the Convention.
2.1.2.3 Spare parts for the system shall be stored on board and be to the satisfaction of
the Administration.
2.1.2.4 In piping sections where valve arrangements introduce sections of closed piping,
such sections shall be fitted with a pressure relief valve and the outlet of the valve shall be
led to open deck.
2.1.2.5 All discharge piping, fittings and nozzles in the protected spaces shall be
constructed of materials having a melting temperature which exceeds 925°C. The piping
and associated equipment shall be adequately supported.
2.1.2.6 A fitting shall be installed in the discharge piping to permit the air testing as
required by paragraph 2.2.3.1.
2.1.3 System control requirements
2.1.3.1 The necessary pipes for conveying fire-extinguishing medium into the protected
spaces shall be provided with control valves so marked as to indicate clearly the spaces to
which the pipes are led. Suitable provisions shall be made to prevent inadvertent release
of the medium into the space. Where a cargo space fitted with a gas fire-extinguishing
system is used as a passenger space, the gas connection shall be blanked during such use.
The pipes may pass through accommodations providing that they are of substantial
thickness and that their tightness is verified with a pressure test, after their installation, at
a pressure head not less than 5 N/mm2. In addition, pipes passing through
accommodation areas shall be joined only by welding and shall not be fitted with drains
or other openings within such spaces. The pipes shall not pass through refrigerated
spaces.
2.1.3.2 Means shall be provided for automatically giving audible and visual warning of
the release of fire-extinguishing medium into any ro-ro spaces and other spaces in which
personnel normally work or to which they have access. The audible alarms shall be
located so as to be audible throughout the protected space with all machinery operating,
and the alarms should be distinguished from other audible alarms by adjustment of
sound pressure or sound patterns. The pre-discharge alarm shall be automatically
activated (e.g., by opening of the release cabinet door). The alarm shall operate for the
length of time needed to evacuate the space, but in no case less than 20 s before the
medium is released. Conventional cargo spaces and small spaces (such as compressor
rooms, paint lockers, etc.) with only a local release need not be provided with such
an alarm.
MSC 81/25/Add.1
ANNEX 6
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2.1.3.3 The means of control of any fixed gas fire-extinguishing system shall be readily
accessible, simple to operate and shall be grouped together in as few locations as possible
at positions not likely to be cut off by a fire in a protected space. At each location there
shall be clear instructions relating to the operation of the system having regard to the
safety of personnel.
2.1.3.4 Automatic release of fire-extinguishing medium shall not be permitted, except as
permitted by the Administration.
2.2 Carbon dioxide systems
2.2.1 Quantity of fire-extinguishing medium
2.2.1.1 For cargo spaces, the quantity of carbon dioxide available shall, unless otherwise
provided, be sufficient to give a minimum volume of free gas equal to 30% of the gross
volume of the largest cargo space to be protected in the ship.
2.2.1.2 For machinery spaces, the quantity of carbon dioxide carried shall be sufficient to
give a minimum volume of free gas equal to the larger of the following volumes, either:
.1 40% of the gross volume of the largest machinery space so protected, the
volume to exclude that part of the casing above the level at which the
horizontal area of the casing is 40% or less of the horizontal area of the
space concerned taken midway between the tank top and the lowest part of
the casing; or
.2 35% of the gross volume of the largest machinery space protected,
including the casing.
2.2.1.3 The percentages specified in paragraph 2.2.1.2 above may be reduced to 35%
and 30%, respectively, for cargo ships of less than 2,000 gross tonnage where two or
more machinery spaces, which are not entirely separate, are considered as forming one
space.
2.2.1.4 For the purpose of this paragraph the volume of free carbon dioxide shall be
calculated at 0.56 m3/kg.
2.2.1.5 For machinery spaces, the fixed piping system shall be such that 85% of the gas
can be discharged into the space within 2 min.
2.2.2 Controls
Carbon dioxide systems shall comply with the following requirements:
.1 two separate controls shall be provided for releasing carbon dioxide into a
protected space and to ensure the activation of the alarm. One control
shall be used for opening the valve of the piping which conveys the gas
into the protected space and a second control shall be used to discharge the
gas from its storage containers. Positive means shall be provided so they
can only be operated in that order; and
MSC 81/25/Add.1
ANNEX 6
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.2 the two controls shall be located inside a release box clearly identified for
the particular space. If the box containing the controls is to be locked, a
key to the box shall be in a break-glass-type enclosure conspicuously
located adjacent to the box.
2.2.3 Testing of the installation
When the system has been installed, pressure-tested and inspected, the following shall be
carried out:
.1 a test of the free air flow in all pipes and nozzles; and
.2 a functional test of the alarm equipment.
2.2.4 Low-pressure CO
2
system
Where a low pressure CO
2
system is fitted to comply with this regulation, the following
applies.
2.2.4.1 The system control devices and the refrigerating plants shall be located within the
same room where the pressure vessels are stored.
2.2.4.2 The rated amount of liquid carbon dioxide shall be stored in vessel(s) under the
working pressure in the range of 1.8 N/mm2 to 2.2 N/mm2. The normal liquid charge in
the container shall be limited to provide sufficient vapour space to allow for expansion of
the liquid under the maximum storage temperatures than can be obtained corresponding
to the setting of the pressure relief valves but shall not exceed 95% of the volumetric
capacity of the container.
2.2.4.3 Provision shall be made for:
.1 pressure gauge;
.2 high pressure alarm: not more than setting of the relief valve;
.3 low pressure alarm: not less than 1.8 N/mm2;
.4 branch pipes with stop valves for filling the vessel;
.5 discharge pipes;
.6 liquid CO
2
level indicator, fitted on the vessel(s); and
.7 two safety valves.
2.2.4.4 The two safety relief valves shall be arranged so that either valve can be shut off
while the other is connected to the vessel. The setting of the relief valves shall not be less
than 1.1 times working pressure. The capacity of each valve shall be such that the
vapours generated under fire condition can be discharged with a pressure rise not more
than 20% above the setting pressure. The discharge from the safety valves shall be led to
the open.
MSC 81/25/Add.1
ANNEX 6
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2.2.4.5 The vessel(s) and outgoing pipes permanently filled with carbon dioxide shall
have thermal insulation preventing the operation of the safety valve in 24 h after
de-energizing the plant, at ambient temperature of 45oC and an initial pressure equal to
the starting pressure of the refrigeration unit.
2.2.4.6
The vessel(s) shall be serviced by two automated completely independent
refrigerating units solely intended for this purpose, each comprising a compressor and the
relevant prime mover, evaporator and condenser.
2.2.4.7 The refrigerating capacity and the automatic control of each unit shall be so as to
maintain the required temperature under conditions of continuous operation during 24 h at
sea temperatures up to 32oC and ambient air temperatures up to 45oC.
2.2.4.8 Each electric refrigerating unit shall be supplied from the main switchboard
busbars by a separate feeder.
2.2.4.9 Cooling water supply to the refrigerating plant (where required) shall be provided
from at least two circulating pumps one of which being used as a stand-by. The stand-by
pump may be a pump used for other services so long as its use for cooling would not
interfere with any other essential service of the ship. Cooling water shall be taken from
not less than two sea connections, preferably one port and one starboard.
2.2.4.10 Safety relief devices shall be provided in each section of pipe that may be
isolated by block valves and in which there could be a build-up of pressure in excess of
the design pressure of any of the components.
2.2.4.11 Audible and visual alarms shall be given in a central control station or, in
accordance with regulation II-1/51, where a central control station is not provided, when:
.1 the pressure in the vessel(s) reaches the low and high values according
to paragraph 2.2.4.2;
.2 any one of the refrigerating units fails to operate; or
.3 the lowest permissible level of the liquid in the vessels is reached.
2.2.4.12 If the system serves more than one space, means for control of discharge
quantities of CO
2
shall be provided, e.g. automatic timer or accurate level indicators
located at the control position(s).
2.2.4.13 If a device is provided which automatically regulates the discharge of the rated
quantity of carbon dioxide into the protected spaces, it shall be also possible to regulate
the discharge manually.
2.3 Requirements of steam systems
The boiler or boilers available for supplying steam shall have an evaporation of at
least 1 kg of steam per hour for each 0.75 m3 of the gross volume of the largest space so
protected. In addition to complying with the foregoing requirements, the systems in all
respects shall be as determined by, and to the satisfaction of, the Administration.
MSC 81/25/Add.1
ANNEX 6
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2.4 Systems using gaseous products of fuel combustion
2.4.1 General
Where gas other than carbon dioxide or steam, as permitted by paragraph 2.3, is produced
on the ship and is used as a fire-extinguishing medium, the system shall comply with the
requirements in paragraph 2.4.2.
2.4.2 Requirements of the systems
2.4.2.1 Gaseous products
Gas shall be a gaseous product of fuel combustion in which the oxygen content, the
carbon monoxide content, the corrosive elements and any solid combustible elements in a
gaseous product shall have been reduced to a permissible minimum.
2.4.2.2 Capacity of fire-extinguishing systems
2.4.2.2.1 Where such gas is used as the fire-extinguishing medium in a fixed
fire-extinguishing system for the protection of machinery spaces, it shall afford protection
equivalent to that provided by a fixed system using carbon dioxide as the medium.
2.4.2.2.2 Where such gas is used as the fire-extinguishing medium in a fixed
fire-extinguishing system for the protection of cargo spaces, a sufficient quantity of such
gas shall be available to supply hourly a volume of free gas at least equal to 25% of the
gross volume of the largest space protected in this way for a period of 72 h.
2.5 Equivalent fixed gas fire-extinguishing systems for machinery spaces and cargo
pump-rooms
Fixed gas fire-extinguishing systems equivalent to those specified in paragraphs 2.2 to 2.4
shall be approved by the Administration based on the guidelines developed by the
Organization.∗"
***
∗
Refer to the Revised guidelines for the approval of equivalent fixed gas fire-extinguishing systems, as referred
to in SOLAS 74, for machinery spaces and cargo pump rooms (MSC/Circ.848) and the Guidelines for the
approval of fixed aerosol fire-extinguishing systems equivalent to fixed gas fire-extinguishing systems, as
referred to in SOLAS 74, for machinery spaces (MSC/Circ.1007). |
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