In:
Key Engineering Materials, Trans Tech Publications, Ltd., Vol. 353-358 ( 2007-9), p. 2601-2605
Abstract:
Pressure steel pipings in a water power plant have been in service for over fifty years. In
order to assess the safety of the piping, whole check and tests for the piping were carried out. The material for some piping is ST3 from former USSR, the other is A3 made in China. The mechanical
properties were investigated by tests and were compared with the original material properties. The result shows the yield strength and tensile strength of serviced steels are less than those of original
materials. The surfaces of the piping were checked to investigate the corrosion, surface defects. The flaws in the welds and near the welds of the pipings were detected by UT and MT, and several weld
flaws were found. Based on the test and NDT investigation results, the strength, fracture and fatigue life of the pipings are assessed according to Chinese standard GB/T19624-2004 and British standard
BS7910-2000. The assessment results show that the strength of the piping is enough, and the pipings with these flaws does not fracture. The piping can be safe in service under the normal operating
condition for 104 to 106 cycles.
Type of Medium:
Online Resource
ISSN:
1662-9795
DOI:
10.4028/www.scientific.net/KEM.353-358
DOI:
10.4028/www.scientific.net/KEM.353-358.2601
Language:
Unknown
Publisher:
Trans Tech Publications, Ltd.
Publication Date:
2007
detail.hit.zdb_id:
2073306-9
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