关于储罐火灾工况，API521和API2000中润湿面积的选取
关于常低压储罐火灾工况，API521和API2000中润湿面积的选取：API521对于立式储罐基本就是25ft，就是7.6m，而API 2000是30ft，9.14m，都适用啊，那不是矛盾吗？是我理解有误吗？不冲突
22.7.3.2 The wetted area of the tank shall be calculated as follows:
(1)Fifty-five percent of the total exposed area of a spfhere or spheroid.
(2)Seventy-five percent of total exposed arera of a horizontal tank.
(3)One hundred percent of the exposed shell and floor area of a rectangular tank,but excluding the top
surfce of the tank.
(4)The first 30 ft(9m) above grade of the exposed shell area of a vertical tank.
Technical Justification and Test Identifier
in Directory
1 Results of Test S-42, with extrapolation of data to
allow increase in maximum ceiling height from
27 ft (8.2 m) to 30 ft (9.1 m).
2 Results of Test S-40, with extrapolation of data to allow increase in maximum ceiling height from
27 ft (8.2 m) to 30 ft (9.1 m).
3 Results of Tests S-22 through S-44, with emphasis on Test S-40, in which no ceiling sprinklers operated. Test S-26 justifies
increasing maximum container size from 1 gal (3.8 L) to 5 gal (19 L).
4 Extrapolation of data in Ref. No. 3. Reduced hazard of Class IIIB liquids justifies increase in allowable storage height and
maximum ceiling height and decrease in required ceiling sprinkler design area.
5 Based on data in Ref. No. 3 above. Potential for larger spill justifies increase in ceiling sprinkler design density and
disallowing quick-response sprinklers. In addition, Tests 572 through
576 indicate the need for face sprinklers at the first level at each rack upright to prevent collapse of
the rack due to fire.
6 Results of Tests S-22 through S-44. Reduced hazard of Class IIIB liquids justifies increase in allowable storage height and
maximum ceiling height and decrease in required ceiling sprinkler design density. Increased container size justifies
increase in ceiling sprinkler design area compared to
Ref. No. 4.
7 Results of Test S-31.
8 Results of Tests S-22 through S-44, with emphasis on Test S-40. Use of relieving-style container is expected to reduce
potential for container
rupture, but could contribute to rate of heat release during a fire.
9 Based on data in Ref. No. 4 and recognition that there is little advantage to use of relieving-style containers for Class
IIIB liquids.
10 Results of Tests S-22 through S-46. See also
Ref. No. 5. Increase in ceiling sprinkler design density justifies in-rack sprinklers at every other level, rather than at
every level. In addition, Tests
572 through 576 indicate the need for face sprinklers at the first level at each rack upright to prevent collapse of the
rack due to fire.
11 Based on data in Ref. No. 6 and recognition that there is little advantage to use of relieving-style containers for Class
IIIB liquids.
12 Based on protection criteria recommended for portable tanks in Appendix D of 1993 edition of NFPA 30 and on results of
Tests S-45 and S-46. In addition, Tests 572 through 576 indicate the need for face sprinklers at the first level at each rack
upright to prevent collapse of the rack due to fire.
13 Based on protection criteria recommended for portable tanks in Appendix D of 1993 edition of NFPA 30 and data in Ref.
No. 6 and recognition
that there is little advantage to use of relieving-style containers for Class IIIB liquids. speedhorse 发表于 2022-5-6 21:45
不冲突
22.7.3.2 The wetted area of the tank shall be calculated as follows:
(1)Fifty-five percent...
还是没有看太懂，无论是AIP 2000还是API 521采用的热量输入不还是平均值吗？那意思不就是可以直接用25ft计算吗？那为什么API 2000表7依然是30ft？ speedhorse 发表于 2022-5-6 21:45
不冲突
22.7.3.2 The wetted area of the tank shall be calculated as follows:
(1)Fifty-five percent...
22.7.3.2 The wetted area of the tank shall be calculated as follows:
这一条来自哪里？我是看的2014的版本，您是哪个？ 本帖最后由 speedhorse 于 2022-5-8 16:00 编辑
API2000对应的是API650/620设备
同时火灾工况的计算来源是基于NFPA30，地面储罐部分的设计要求和考虑
中心思想，有围堰考虑的是池火，火焰高度是统计值，不同版本之间数值有变化，规范中介绍了，而且，这样的工况储罐壁较高，烘烤的面积更大（润湿面积）。
美国人，在石油工业初期，组织实验论证了。大概这个意思。
不知道对不对，希望高手指正。
https://meng.horse/thread-242240-1-1.html
基于API2000-2014，利用aspen安全分析工具进行储罐呼吸量及紧急泄放工况计算
https://meng.horse/thread-242123-1-1.html
API 2000-2014 常压与低压储罐通风-中文版
https://meng.horse/thread-240272-1-1.html
本帖最后由 speedhorse 于 2022-5-25 12:49 编辑
API2000，是基于NFPA30中地面储罐部分 speedhorse 发表于 2022-5-8 21:54
API2000，是基于NFPA30中地面火炬部分
非常感谢您的回复
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