正式员工
- UID
- 399
- 积分
- 678
- 金币
-
- 活跃
-
- 阅读权限
- 50
- 注册时间
- 2006-9-1
- 最后登录
- 1970-1-1
|
楼主 |
发表于 2012-12-25 08:57
|
显示全部楼层
来自: 中国天津
hanyuxiang 发表于 2012-12-24 18:38
柔性风管必须是不燃或防燃材料,而且厂家应该出ABS approved cert.
Chapter II-2, Part C SOLAS 74/78 page 60/112
short length of duct, not in general exceeding 0.02m2 in free cross-sectional area nor 2 m in length, need not be steel or equivalent provided that all of the following conditions are met:
.3.1 subject to paragraph 7.4.4.3.2 the duct is constructed of any material which has low flame spread characteristics;
3.2 on ships constructed on or after 1 July 2010, the ducts shall be made of heat resisting noncombustible material, which my be faced internally and externally with membrances having low flame-spread characteristics and, in each case, a calorific* value not exceeding 45 MJ/m2 of their surface area for the thickness used;
.3.3 the duct is used only at the terminal end of the ventilation system; and
3.4 the duct is not located closer than 600mm measured along its length to a penetration of an "A" or "B" class division, including continuous "B" class ceilings.
steel or equivalent 并没有要求一定是钢质的,防火帆布是不是EQUIVALENT?
|
|