Features of ultrasonic control of butt welded joints of polyethylene pipes

2020 ◽  
pp. 46-52
Author(s):  
N.P. Aleshin ◽  
D.M. Kozlov ◽  
L.YU. Mogilner
Keyword(s):  
Quality Control ◽  
Welded Joints ◽  
Ultrasonic Testing ◽  
Ultrasonic Inspection ◽  
Mechanical Tests ◽  
Ultrasonic Control ◽  
Lack Of Fusion ◽  
Polyethylene Pipes ◽  
End To End

The reliability of ultrasonic testing (UT) of the quality of welded joints of polyethylene pipelines, made end-to-end with a heated tool, is considered in comparison with mechanical tests and radiography. The greatest detection of solid defects is provided by ultrasonic inspection with the use of chord tipe probes (not less than 90 %). When detecting defects translucent for ultrasound (lack of penetration, lack of fusion, etc.), the reliability decreases to 70÷80 %. Keywords: welding, polyethylene pipeline, quality control, ultrasonic testing, chord tipe probe. [email protected]

Assessment of the quality of spot-welded joints by ultrasonic testing

2006 ◽  
Vol 20 (5) ◽  
pp. 350-354
Author(s):  
A Ambroziak ◽  
Z Koralewicz ◽  
M Korzeniowski ◽  
P Kustron
Keyword(s):  
Welded Joints ◽  
Ultrasonic Testing ◽  
Spot Welded

Assessing the quality of adhesive bonded joints using an innovative neural network approach

2014 ◽  
Vol 5 (3) ◽  
pp. 187-201 ◽  
Author(s):  
Christos Vasilios Katsiropoulos ◽  
Evangelos D. Drainas ◽  
Spiros G. Pantelakis
Keyword(s):  
Neural Network ◽  
Fracture Toughness ◽  
Ultrasonic Inspection ◽  
Mechanical Tests ◽  
Bonded Joints ◽  
Adhesively Bonded ◽  
Severity Factor ◽  
Adhesively Bonded Joints ◽  
Content Type

Purpose – The purpose of this paper is to assess the quality of adhesively bonded joints using an alternative artificial neural networks (ANN) approach. Design/methodology/approach – Following the necessary surface pre-treatment and bonding process, the coupons were investigated for possible defects using C-scan ultrasonic inspection. Afterwards, the damage severity factor (DSF) theory was applied in order to quantify the existing damage state. A series of G IC mechanical tests was then conducted so as to assess the fracture toughness behavior of the bonded samples. Finally, the data derived both from the NDT tests (DSF) and the mechanical tests (fracture toughness energy) were combined and used to train the ANN which was developed within the present work. Findings – Using the developed neural network (NN) the bonding quality, in terms not only of defects but also of fracture toughness behavior, can be accessed through NDT testing, minimizing the need for mechanical tests only in the initial material characterization phase. Originality/value – The innovation of the paper stands on the feasibility of an alternative approach for assessing the quality of adhesively bonded joints using and ANNs, thus minimizing the necessary testing effort.

scholarly journals IMPROVING THE QUALITY OF CONTROL OF WELDED JOINTS IN THE PRODUCTION OF MECHANICAL ENGINEERING PRODUCTS

2021 ◽  
Vol 23 (3) ◽  
pp. 40-46
Author(s):  
I.V. Malkina ◽  
◽  
D.V. Zhdanov ◽  
Keyword(s):  
Quality Control ◽  
Welded Joints ◽  
Block Diagram ◽  
Programmable Logic Controller ◽  
Automated System ◽  
Programmable Logic ◽  
Sensors And Actuators ◽  
Quality Of Control ◽  
Automated Quality Control

The purpose of the work is to develop an automated quality control system for welded joints of cable car structures designed and manufactured at the Skado LLC enterprise (Samara) in order to improve the quality of control. The analysis of requirements for welded structures and welded joints of cable cars is carried out, methods of control of welded joints are considered. A block diagram of an automated system for quality control of welded joints based on the method of ultrasonic testing has been developed. The analysis of ultrasonic sensors on phased arrays is carried out. The sensors and actuators of the system are selected. A scheme for interfacing system elements with a programmable logic controller has been developed. The structure of the system and the scheme of interfacing the system elements with the programmable logic controller are described. A method for performing control has been developed.

scholarly journals Selected Aspects of Ultrasonic Testing of Difficult Materials

2020 ◽  
pp. 33-42
Author(s):  
Łukasz Rawicki ◽  
Jacek Słania
Keyword(s):  
Welded Joints ◽  
Ultrasonic Testing ◽  
Ultrasonic Beam ◽  
Factors Affecting ◽  
Management Personnel ◽  
Large Anisotropy ◽  
Physical Phenomena ◽  
Special Process

Welding is considered as a “Special Process”, which means that its quality cannot be readily verified and its successful application requires specialist management, personnel and procedures. It is important to conduct proper testing of the welded joints, including volumetric testing. In this case there are conducted ultrasonic testing, which enable detecting volumetric discontinuities. Ultrasonic testing meets many problems while testing joints with large anisotropy. The problems are caused by the physical phenomena, e.g. transformation, dispersion and absorption of the wave. It is connected with the structure of the material, which cause different propagation of the ultrasonic beam. The article presents the review of the factors affecting the quality of ultrasonic testing.

SIMULATION OF DEFECTS IN ULTRASONIC TESTING OF WELDED JOINTS

2020 ◽  
Vol 13 (1) ◽  
pp. 4-9
Author(s):  
Evgeniy Andreev ◽  
S. Nikolenko ◽  
Svetlana Sazonova
Keyword(s):  
Quality Control ◽  
Welded Joints ◽  
Ultrasonic Testing ◽  
Phased Array ◽  
Electronic Media ◽  
Considerable Time

The paper analyzes and develops proposals for optimizing the quality control of welded joints of technological pipelines using mechanized ultrasonic testing using the phased array method. The main advantage of the proposed method, in addition to identifying all existing defects, is the storage of information about scanning for a considerable time on electronic media, which makes it possible to use it in cases where a controversial situation arises, when an incident occurs, or if an accident occurs.

Friction Stir Welding of Copper Alloy CuETP

2016 ◽  
Vol 716 ◽  
pp. 907-914 ◽  
Author(s):  
Nikola Sibalic ◽  
Milan Vukcevic
Keyword(s):  
Friction Stir Welding ◽  
Welded Joints ◽  
Copper Alloy ◽  
Experimental Studies ◽  
Welding Process ◽  
Mechanical Tests ◽  
Tool Geometry ◽  
Friction Stir ◽  
Sheet Copper

Experimental researches that were performed in order to determine the mechanical parameters in the process of joining of materials using the FSW process are presented in this paper. The paper presents the joining of CuETP sheet copper alloy, with thickness of 5 mm, and provides details of the friction stir welding process. Besides that, the influence of tool geometry and the regime of welding on the quality of welded joints, was investigated. Experimental studies are made on the basis of the adopted multifactoral orthogonal plan, with varying of factors on two levels and repetition in the central point of the plan. Parameters varied in the experiment were: welding speed, rotation speed of tool, angle of pin slope, pin diameter and shoulder diameter. The family of tools is provided, based on the adopted geometric parameters. The experiment was carried out in a laboratory at ambient temperature in conditions similar to those in the production. In order to determine the quality of welded joints, mechanical tests were performed in the paper, and tensile strength and impact toughness were determined.

Development and Assessment of Ultrasonic Inspection System for Polyethylene Pipes

2013 ◽  
Author(s):  
Malcolm Spicer ◽  
Mike Troughton ◽  
Fredrik Hagglund
Keyword(s):  
Welded Joints ◽  
Nuclear Power ◽  
Ultrasonic Inspection ◽  
Nuclear Regulatory Commission ◽  
The United States ◽  
Inspection System ◽  
Buried Pipe ◽  
Polyethylene Pipes ◽  
American Society ◽  
Regulatory Commission

The American Society of Mechanical Engineers (ASME) is revising the published Code Case (N-755) for the use of polyethylene (PE) in nuclear power plant buried pipe systems. However, the United States Nuclear Regulatory Commission (NRC) has not approved this Code Case due to a number of concerns; one of which is the lack of validated non-destructive examination (NDE) techniques for inspecting welded joints in PE pipes. This paper describes the development of an ultrasonic phased array system and procedures for the inspection of welded joints in PE pipes of diameters between 125 and 1000mm. The system includes hardware and software which has been designed specifically for inspecting PE pipe joints. The system has been assessed by a number of organizations and the results of these trials will be presented. Alongside the development of the inspection system, a major program of work has been carried out to develop acceptance criteria for flaws in PE pipe welds. The types of flaws investigated included particulate contamination, planar flaws and cold fusions. The critical flaw sizes and contamination levels were determined based on both long-term and short-term testing of welded joints in PE pipes.

Status of nondestructive control of transport function metal products at JSC EVRAZ NTMK

2020 ◽  
Vol 76 (6) ◽  
pp. 586-590
Author(s):  
S. P. Bersenev ◽  
E. M. Slobtsova
Keyword(s):  
Crack Detection ◽  
Middle Part ◽  
Control Line ◽  
Magnetic Powder ◽  
Nondestructive Control ◽  
Automated Control ◽  
Ultrasonic Control ◽  
Acoustic Contact ◽  
In Series

Achievements in the area of automated ultrasonic control of quality of rails, solid-rolled wheels and tyres, wheels magnetic powder crack detection, carried out at JSC EVRAZ NTMK. The 100% nondestructive control is accomplished by automated control in series at two ultrasonic facilities RWI-01 and four facilities УМКК-1 of magnetic powder control, installed into the exit control line in the wheel-tyre shop. Diagram of location, converters displacement and control operations in the process of control at the facility RWI-01 presented, as well as the structural diagram of the facility УМКК-1. The automated ultrasonic control of rough tyres is made in the tyres control line of the wheel-tyre shop at the facility УКБ-1Д. The facility enables to control internal defects of tyres in radial, axis and circular directions of radiation. Possibilities of the facility УКБ-1Д software were shown. Nondestructive control of railway rails is made at two facilities, comprising the automated control line of the rail and structural shop. The УКР-64Э facility of automated ultrasonic rails control is intended to reveal defects in the area of head, web and middle part of rail foot by pulse echo-method with a immersion acoustic contact. The diagram of rail P65 at the facility УКР-64Э control presented. To reveal defects of the macrostructure in the area of rail head and web by mirror-shadow method, an ultrasonic noncontact electromagnetic-acoustic facility is used. It was noted, that implementation of the 100% nondestructive control into the technology of rolled stuff production enabled to increase the quality of products supplied to customers and to increase their competiveness.

Modification of tundish design to improve quality of slabs, casted at CCM No. 4 of EVRAZ NTMK

2020 ◽  
Vol 76 (6) ◽  
pp. 559-563
Author(s):  
I. M. Zakharov ◽  
V. A. Smirnov ◽  
D. V. Sushnikov ◽  
A. G. Lyzhin ◽  
E. A. Lavrova ◽  
...  
Keyword(s):  
Basic Number ◽  
Metal Level ◽  
Surface Layers ◽  
Secondary Oxidation ◽  
Strip Rolling ◽  
Actual Distribution ◽  
Ultrasonic Control ◽  
Analysis Of Results ◽  
Water Simulation

A technology of continuous casting of steel has a large effect on its contamination. In particular, proper organization of metal flows in tundish and mold is very important. After completion a series of casting through a tundish and drop of metal level in it, it possible, that the slag flows from the surface layers of the tundish to capture the metal. An analysis of results of ultrasonic control of finished strip showed, that the basic number of the revealed defects was obtained during strip rolling out of the last slabs of the last heat in a series for a tundish. Metallographic studies determined, that the defects were located in the slab axis zone and filled by macro-inclusions of complex composition. To determine the actual distribution of metal flows, a water simulation of them was accomplished for the existing design of the EVRAZ NTMK tundish. It was determined, that at the drop of metal level in a tundish, a capture of slag from the metal reservoir and its transfer into the main bath of the tundish takes place due to whirligig flows. Following the weight metal consumption, the zone of slag inclusions distribution enlarges. Besides, denudation of the metal mirror in the metal reservoir takes place, resulted in metal secondary oxidation. Based on the results of the simulation, it was proposed to modify the design of the “turbostop”, which is installed in the metal reservoir of the tundish. Besides, it was proposed to remove the dividers installation in the tundish. It was noted, that the proposed steps enable to ensure a minimal level of rejections.

Development and Application of Quality Control System for Highway Subgrade Construction

2019 ◽  
Vol 2 (5) ◽  
Author(s):  
Tong Wang
Keyword(s):  
Quality Control ◽  
Real Time ◽  
Detection Method ◽  
System Development ◽  
Effective Control ◽  
Construction Process ◽  
Development Mode ◽  
The Road ◽  
Whole Process

The compaction quality of the subgrade is directly related to the service life of the road. Effective control of the subgrade construction process is the key to ensuring the compaction quality of the subgrade. Therefore, real-time, comprehensive, rapid and accurate prediction of construction compaction quality through informatization detection method is an important guarantee for speeding up construction progress and ensuring subgrade compaction quality. Based on the function of the system, this paper puts forward the principle of system development and the development mode used in system development, and displays the development system in real-time to achieve the whole process control of subgrade construction quality.

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