Non-destructive testing and diagnostics of the material after long-term operation in thermal power equipment

2018 ◽  
Author(s):  
Nikolay Ababkov ◽  
Aleksandr Smirnov ◽  
Vladimir Danilov ◽  
Vadim Gorbatenko
Keyword(s):  
Thermal Power ◽  
Power Equipment ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Term Operation ◽  
Non Destructive

Cyclic vs. Static Loading Behaviour of Masonry Blocks: An Approach to Evaluate the Long-Term Behaviour

2010 ◽  
Vol 452-453 ◽  
pp. 129-132
Author(s):  
Paola Antonaci ◽  
Pietro G. Bocca ◽  
Davide Masera
Keyword(s):  
Fatigue Behaviour ◽  
Non Destructive Testing ◽  
Static Displacement ◽  
Destructive Testing ◽  
Testing Laboratory ◽  
Cyclic Displacement ◽  
Non Destructive ◽  
Compressive Tests

The paper presents the results of an experimental investigation conducted on bricks. Prism-shaped specimens were produced. Laboratory tests were carried out at the Non-Destructive Testing Laboratory of the Politecnico di Torino. They were subjected to static compressive tests for the determination of their mechanical properties and cyclic compressive tests for the analysis of their fatigue behaviour. The aim of this work is to apply a failure criterion based on the observation of the static and cyclic curves to estimate the fatigue life and the long-term behaviour of the brick. Subsequently, it will be possible to give a relation between the static-displacement and cyclic-displacement of the material tested.

Comparison and Analysis of Effective Guided Wave Standards Between GB and ASTM

2019 ◽  
Author(s):  
Ju Ding ◽  
Min Zhang ◽  
Shu-hong Liu ◽  
Chen-huai Tang ◽  
Xu-chen Zhu ◽  
...  
Keyword(s):  
Thermal Power ◽  
Guided Wave ◽  
Test Method ◽  
Amplitude Curve ◽  
Non Destructive Testing ◽  
Ultrasound Guided ◽  
Destructive Testing ◽  
Wave Detection ◽  
Ultrasonic Guided Wave ◽  
Non Destructive

Abstract This paper discusses four different ultrasonic guided wave standards. Three of them are China’s national standards or industry standards: GB/T 31211-2014 “Nondestructive Testing Ultrasound Guided Wave Detection”, GB/T 28704-2012“Non-destructive testing—Test method for ultrasonic guided wave testing based on magnetostrictive effects”, and DL/T 1452-2015 “Thermal Power Pipeline Ultrasound Guided Wave Detection”. The another one is ASTM E2929:“Standard Practice for Guided Wave Testing of Above Ground Steel Piping with Magnetostrictive Transfusion”. Through six aspects in this article, including testing application scope, preliminary requirements, standard specimen and comparative specimen, distant amplitude curve and time gain curve, the existing difference between China and America is obvious and diversity. It is necessary to explore the underlying reasons for the connection of Chinese code and international code in the field of Non-destructive testing. During the standardization, anyone of the standard should be actually compared on the presentation of chart, and the verification and comparison of results, and lists the similarities and differences of each part based on GB31211. This paper provides reference for China to integrate with foreign standards in the field of ultrasonic guided wave detection of pressure vessel and pipelines.

Fatigue Crack Propagation Monitoring by Acoustic Emission Signal Analysis

2011 ◽  
Vol 465 ◽  
pp. 370-373 ◽  
Author(s):  
Paola Antonaci ◽  
Pietro G. Bocca ◽  
Davide Masera
Keyword(s):  
Acoustic Emission ◽  
Signal Analysis ◽  
Mechanical Response ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Testing Laboratory ◽  
Cyclic Action ◽  
Emission Signal ◽  
Non Destructive

The aim of this work is to analyse the mechanical response of the masonry specimens under long-term action by means of cyclic tests. To this end laboratory tests were carried out at the Non-Destructive Testing Laboratory of the Politecnico di Torino. The Acoustic Emission technique was employed to assess the damage evolution, and the mechanical properties decay in order to evaluate the extent and the evolution of micro and macro-cracking due to cyclic action until structural collapse in masonry blocks and mortar layers.

scholarly journals Non-destructive testing of industrial equipment using muon radiography

2018 ◽  
Vol 377 (2137) ◽  
pp. 20180054
Author(s):  
Pablo Martinez Ruiz-del Arbol ◽  
Pablo Gomez Garcia ◽  
Carlos Diez Gonzalez ◽  
Aitor OrioAlonso
Keyword(s):  
Statistical Tests ◽  
Cosmic Ray ◽  
Precise Determination ◽  
Industrial Equipment ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Industrial Facilities ◽  
Term Operation ◽  
Muon Radiography ◽  
Non Destructive

A new application of muon radiography (MR) is presented in the context of non-destructive testing of industrial equipment. The long-term operation of industrial facilities frequently involves the deterioration of critical components such as pipes and cauldrons due to corrosion and other processes. The precise determination of the inner state of this equipment is needed to ensure the integrity of the facility. MR can be used to infer the thickness of these components through the comparison and further classification of muon observables with respect to well-known templates. A simulation example is presented where the thickness of a pipe made of steel is studied using the Point of Closest Approach method and simple Kolmogorov–Smirnov statistical tests. A precision of about 2–4 mm is obtained using a simple detector with a spatial resolution of 4 mm and exposure times of about 2 h. This article is part of the Theo Murphy meeting issue ‘Cosmic-ray muography’.

Analysis of the Cause of Damage to the Steam Generator Cold Collector’s Dissimilar Weld Joint at Slovak Nuclear Power Plant

2020 ◽  
Vol 405 ◽  
pp. 165-170
Author(s):  
Michal Kapusňák ◽  
Michal Hajas ◽  
Marek Adamech
Keyword(s):  
Steam Generator ◽  
Weld Joint ◽  
Nuclear Power ◽  
Metallographic Analysis ◽  
Destructive Testing ◽  
Term Operation ◽  
Dissimilar Weld ◽  
Root Position ◽  
Non Destructive

By the non-destructive testing of a dissimilar weld joint (DWJ) of cold collector DN 1100 (CC) on a steam generator, indications were found on inner-side cold collector’s surface at the root position of the examined weld. All the identified indications were very similar in shape and form, therefore, it was decided to cut out a part of the damaged site from this type of DWJ DN 1100 and get the obtained ring (real piece of material) for complex metallographic analysis. This paper briefly describes the results and recommendations found for the future reference during the next long‑term operation induced ageing and degradation of critical steam generator parts in NPP Bohunice Unit 4. There are summarized the results obtained from evaluation of original DWJ material.

Acoustic Emission Method for Monitoring Corrosion Reactions

CORROSION ◽  
1976 ◽  
Vol 32 (4) ◽  
pp. 121-126 ◽  
Author(s):  
T. W. RETTIG ◽  
M. J. FELSEN
Keyword(s):  
Acoustic Emission ◽  
Non Destructive Testing ◽  
Acoustic Emission Method ◽  
Emission Method ◽  
Destructive Testing ◽  
Corrosion Reaction ◽  
Reaction Processes ◽  
Non Destructive ◽  
Corrosion Research

Abstract There is a continuing need for new test techniques to follow corrosion reaction processes and to predict long-term materials performance in aggressive environments. Additionally, there is a growing awareness of the importance of applying non-destructive inspection to determine the presence of corrosion in non-visible areas of equipment and structures. The possibilities of utilizing acoustic emission for a broad range of applications in the study of these problems were explored. Proprietary methods were developed to follow corrosion reactions and to monitor corrosion of simulated and actual structures. These experiments point out the applicability of acoustic emission as a sensitive new tool for corrosion research and non-destructive testing (NDT) in corrosion prone structures and equipment.

Creep Behaviour of Reinforced Masonry Walls by CFRP Sheets and Structural Mortar

2010 ◽  
Vol 452-453 ◽  
pp. 125-128
Author(s):  
Paola Antonaci ◽  
Pietro G. Bocca ◽  
Davide Masera
Keyword(s):  
Ad Hoc ◽  
Creep Behaviour ◽  
Masonry Walls ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Reinforced Masonry ◽  
Loading Tests ◽  
Cyclic Loading Tests ◽  
Non Destructive

An experimental analysis on a set of strengthened masonry walls has been carried out by means of cyclic loading tests in order to simulate the creep effects. Laboratory tests were carried out at the Non-Destructive Testing Laboratory of the Politecnico di Torino: ad hoc brickwork specimens were manufactured and reinforced by FRP and strengthening mortar. The main goal of this experimental work is to demonstrate that in the choice of the masonry reinforcement is important to value not only the increment of the ultimate strength of the material reinforced, but also its response and durability in term of long-term action, called as creep phenomenon.

Time Present and Time Past

1990 ◽  
Vol 204 (1) ◽  
pp. 1-20
Author(s):  
M G Pollard
Keyword(s):  
Non Destructive Testing ◽  
Destructive Testing ◽  
Railway Systems ◽  
Reduction Strategies ◽  
Aeronautical Engineering ◽  
Reduce Energy Consumption ◽  
Monitoring And Diagnostics ◽  
Non Destructive

The Railway Division Chairman recalls his early interest in aeronautical engineering and then goes on to review his career in British Railways, giving details of some of the projects with which he has been involved. He discusses the role of development and the importance of building and testing prototypes, and outlines some successful long-term developments in the aircraft and railway industries. He then describes some current developments taking place in British Railways which will have important implications for the future. These include a.c. traction systems, noise reduction, strategies to reduce energy consumption, health monitoring and diagnostics of railway systems, non-destructive testing and crashworthiness.

Application of Intelligent AutoCAD in Ultrasonic Inspection of the Welds

2011 ◽  
Vol 130-134 ◽  
pp. 2421-2424
Author(s):  
Guo Qiang Cao ◽  
Lan Yao ◽  
Yi Tong Dai
Keyword(s):  
Ultrasonic Inspection ◽  
Flaw Detection ◽  
Practical Experience ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Factors Affecting ◽  
Ultrasonic Flaw ◽  
Weld Inspection ◽  
Non Destructive

Ultrasonic flaw detection in weld inspection is commonly used in non-destructive testing methods. But when the ultrasonic inspection of the welds, point location of defects and identify need technical personnel calculation and according to their long-term practical experience, it requirement for inspection personnel has higher technology.And in ultrasonic weld inspection there will be some factors affecting the accuracy of positioning. It will lead to limitations of ultrasonic weld inspection. To solve these problems effectively, AutoCAD will be used in ultrasonic weld inspection.

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