海上压力容器腐蚀行为的风险与检验研究

doi:10.11902/1005.4537.2020.029

中国腐蚀与防护学报

2020, Vol. 40

Issue (6): 592-598 DOI: 10.11902/1005.4537.2020.029

研究报告

本期目录 | 过刊浏览

海上压力容器腐蚀行为的风险与检验研究

周然¹, 张晓蕾²(

), 李祥锋¹, 凌爱军¹, 杜建港³

1.中国船级社海洋工程技术中心天津 300457
2.中国船级社天津分社天津 300457
3.中国船级社总部北京 100007

Assessment and Inspection of Corrosion Induced Risk About Offshore Pressure Vessels

ZHOU Ran¹, ZHANG Xiaolei²(

), LI Xiangfeng¹, LING Aijun¹, DU Jiangang³

1. China Classification Society Offshore Engineering Technology Center, Tianjin 300457, China
2. China Classification Society Tianjin Branch, Tianjin 300457, China
3. China Classification Society, Beijing 100007, China

全文: PDF(1291 KB) HTML

摘要:

基于API 581标准，结合压力容器现场所处环境和对应腐蚀机理，采用定量分析方法对压力容器各类损伤系数、失效概率和失效后果进行分析与计算。同时结合制定的风险可接受准则，对压力容器风险等级进行高低划分，针对风险高的设备及组件，结合其各类损伤系数和失效后果，制定针对性的未来检验周期、检验计划、检验措施和相关后果监控措施。研究结果能实现对压力容器及组件的风险准确定量评估，并针对风险制定相应检验周期和检验计划。此方法对合理分配现场检验人力、财力和控制平台安全生产具有重要意义。且该方法已成功应用于中国海域FPSO，可供其他工程借鉴参考。

关键词 ： API 581标准, 压力容器, 风险, 检验

Abstract：

Referring to the standard API 581 and considering the field environmental situation as well as the relevant corrosion mechanism of pressure vessels, a quantitative analysis method has been proposed to analyze and calculate the damage coefficient of various type, failure probability and failure consequence for pressure vessels. The risk levels of the pressure vessels may be differentiated as several grades, in accordance with the established risk acceptance criteria. Therewith, a proper plant related with schedule, content and measures of inspection, as well as, the relevant control of risk consequences may be formulated for high-risk vessels and components. The research results can be beneficial to the accurate and quantitative evaluation of the risk degree of pressure vessels, and the confirmation of relevant inspection plant for risks. The proposed method is of great significance to the reasonable allocation of human and financial resources for the on-site inspection and the safe production control of platforms. In conclusion, this method has been successfully applied to FPSO in the China sea and may further be adopted as a reference for other projects.

Key words： API 581 standard pressure vessel risk inspection

收稿日期: 2020-03-03

ZTFLH:

TE38

基金资助:工业和信息化部高技术船舶项目(G014614002);第七代超深水钻井平台 (船) 创新专项

通讯作者: 张晓蕾 E-mail: zhangxiaolei@ccs.org.cn

Corresponding author: ZHANG Xiaolei E-mail: zhangxiaolei@ccs.org.cn

作者简介: 周然，男，1990年生，工程师，硕士生

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引用本文:

周然, 张晓蕾, 李祥锋, 凌爱军, 杜建港. 海上压力容器腐蚀行为的风险与检验研究[J]. 中国腐蚀与防护学报, 2020, 40(6): 592-598.
Ran ZHOU, Xiaolei ZHANG, Xiangfeng LI, Aijun LING, Jiangang DU. Assessment and Inspection of Corrosion Induced Risk About Offshore Pressure Vessels. Journal of Chinese Society for Corrosion and protection, 2020, 40(6): 592-598.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2020.029 或 https://www.jcscp.org/CN/Y2020/V40/I6/592

图1 压力容器腐蚀风险与检验方法研究流程

表1 生产分离器设计基础数据表[I]

表2 生产分离器设计基础数据表[II]

表3 生产分离器现场检测数据表[1]

表4 生产分离器现场检测数据表[II]

表5 生产分离器现场检测数据表[III]

图2 简体及封头的现场腐蚀情况图

Time			D_f^thin	D_f^SSC	D_f^HIC/SOHIC-H $2$ ^S	D_f^CLSCC	D_f^ext	D_f^CUIF	D_f^ext-CLSCC	D_f^CUI-CLSCC	D_f(t)
t=0			8.65	1	0.5	50	1.92	1.92	1	5	63.65
RBI date (1.5)			11.93	1.56	0.78	78	2.58	2.63	1.56	7.8	11.93+55×t^1.1
t=2.5	A	[1,2.36]	14.45	2.74	1.37	21.92	2.56	2.57	2.74	2.74	17.02+8×t^1.1
	A	t≥2.36	14.45	2.74	1.37	21.92	2.56	2.57	2.74	2.74	14.45+9×t^1.1
	B	[1,1.26]	14.55	2.74	1.37	54.8	2.57	2.59	2.74	5.48	17.14+20×t^1.1
	B	t≥1.26	14.55	2.74	1.37	54.8	2.57	2.59	2.74	5.48	14.55+22×t^1.1
	C		14.72	2.74	1.37	137	2.57	2.62	2.74	13.7	14.72+55×t^1.1

表6 生产分离器筒体失效概率计算结果

Time			D_f^thin	D_f^SSC	D_f^HIC/SOHIC-H $2$ ^S	D_f^CLSCC	D_f^ext	D_f^CUIF	D_f^ext-CLSCC	D_f^CUI-CLSCC	D_f(t)
t=0			17.31	1	0.5	50	3.85	3.85	1	5	72.31
RBI date (1.5)			20.3	1.56	0.78	78	3.92	4.58	1.56	7.8	20.3+55×t^1.1
$t = 2.36$	A	[1,4.43]	20.2	2.57	1.29	20.56	4.5	5.14	2.57	2.57	25.34+8×t^1.1
	A	t≥4.43	20.2	2.57	1.29	20.56	4.5	5.14	2.57	2.57	20.2+9×t^1.1
	B	[1,2.38]	20.4	2.57	1.29	51.4	4.51	5.18	2.57	5.14	25.58+20×t^1.1
	B	t≥2.38	20.4	2.57	1.29	51.4	4.51	5.18	2.57	5.14	20.4+22×t^1.1
	C		20.62	2.57	1.29	128.5	4.53	5.24	2.57	12.85	20.62+55×t^1.1

表7 生产分离器左封头失效概率计算结果

表8 经济损失风险可接受准则

图3 左封头失效概率曲线

图4 筒体失效概率曲线

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