Remaining life assessment of welded pipes containing cracks

被引：5
|
作者：
Peace, Robert
Furtado, Heloisa Cunha
Le May, Iain
机构：
[1] Met Consulting Serv Ltd, Saskatoon, SK S7K 4E3, Canada
[2] CEPEL, BR-21941590 Rio De Janeiro, Brazil
来源：
INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING | 2006年 / 83卷 / 11-12期
关键词：
remaining life; welded steel pipe; creep-fatigue crack growth;
D O I：
10.1016/j.ijpvp.2006.08.005
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The presence of flaws, their size and location in the welded region affects the safe service life of pressure pipes operating at elevated temperature. A remaining life assessment was required to determine the probable remaining safe life of pressure pipes in a high-temperature steam distribution system in which crack-like defects had been identified in many welds. The crack-like defects indicated by NDE lacked the required information to fully identify their locations within the pipe wall. The effect of not knowing complete details of the location of the identified cracks was studied by considering a 360 degrees circumferential crack with initial radial dimension a(0). The crack positions evaluated were: an internal surface crack, an external surface crack, and embedded cracks at various distances from the internal wall of the pipe. Crack growth was modeled using time-dependent fracture mechanics and a newly developed computer code. (c) 2006 Elsevier Ltd. All rights reserved.
引用
收藏
页码：798 / 802
页数：5
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