scholarly journals Automatic Ultrasonic Testing System Designed For Small-Diameter Steel Pipes With Thick Wall

2017 ◽  
Vol 10 (1) ◽  
pp. 301-314
Author(s):  
Qi Zhang ◽  
Li Hou ◽  
Rui Tang
Keyword(s):  
Ultrasonic Testing ◽  
Small Diameter ◽  
Thick Wall ◽  
Testing System ◽  
Steel Pipes

Key Technology of Automatic Ultrasonic Testing System for Corkscrewed Steel Pipes

2011 ◽  
Vol 291-294 ◽  
pp. 2893-2897
Author(s):  
Yi Hua Kang ◽  
Jun Tu ◽  
Jian Bo Wu ◽  
Yan Hua Sun
Keyword(s):  
Ultrasonic Testing ◽  
High Speed ◽  
Steel Pipe ◽  
Inspection System ◽  
Testing System ◽  
Technical Data ◽  
Key Technology ◽  
Steel Pipes ◽  
The World ◽  
Increasing Demand

According to the increasing demand for the steel pipe in the world nowadays, as an effective method, ultrasonic testing plays a very important role in quality controlling procedures. Compared to the mature technology of the world, the domestic one still has some technical difficulties in high-speed probe rotating mode. This paper proposes an approach of combination of multi-probe arrays based on the internal detection way to solve the difficulty of coarse pitch. The structure of the inspection system is described with the workflow laying out. The practicability and reliability of the system is verified by means of a mass of experiments. The numeric automatic ultrasonic testing system has been successfully used and the technical data is given out at last.

Noise Reduction Using Wavelet Transform in Ultrasonic Flaw Detection of Small-Diameter Steel Pipe with Thick Wall

2011 ◽  
Vol 383-390 ◽  
pp. 4755-4761
Author(s):  
Shao Jiang Wang ◽  
Li Hou ◽  
Yu Lin Wang ◽  
Jian Quan Zhang
Keyword(s):  
Wavelet Transform ◽  
Noise Reduction ◽  
Flaw Detection ◽  
Small Diameter ◽  
Internal Noise ◽  
Thick Wall ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Ultrasonic Signals ◽  
Steel Pipes

In order to ensure that small diameter steel pipes with thick wall have high intensity and high quality, ultrasonic immersion method with focusing probe was used to detect the flaw of the small-diameter steel pipes with thick wall. In practice, the echoes are often corrupted with external noise or internal noise, therefore, it is necessary to reduce the noise and to enhance the SNR of ultrasonic signals. A technique for improving the SNR of ultrasonic signals using wavelet transform is presented. In this method, WT, consider as one band-pass filter, is used to remove the noises. The performance of this technique has been verified by experimental, which is done by using a series of flaw ultrasonic echoes obtained from a specimen of the small-diameter steel pipes with thick wall. In particular we have found the processing of the ultrasonic signals using wavelet transform extremely useful for noise reduction. After processing, the SNR of ultrasonic signals are enhanced substantially. All experimental results show that this technique is effective for removing the white noise from the ultrasonic signals.

Development of Ultrasonic Testing System of Rubber Roll for the Paper Manufacture

2005 ◽  
Vol 59 (9) ◽  
pp. 1293-1301
Author(s):  
Shigeki Watanabe ◽  
Mitsunao Ariji ◽  
Kazuo Kobayashi
Keyword(s):  
Ultrasonic Testing ◽  
Testing System

scholarly journals Research on on-line ultrasonic testing of small diameter thin wall stainless steel straight welded pipe

2021 ◽  
Vol 1820 (1) ◽  
pp. 012086
Author(s):  
Huaishu Hou ◽  
Ding Lu ◽  
Shiwei Zhang ◽  
Yi Zhang ◽  
Chaolei Cheng
Keyword(s):  
Stainless Steel ◽  
Ultrasonic Testing ◽  
Small Diameter ◽  
Thin Wall ◽  
On Line ◽  
Welded Pipe ◽  
Wall Stainless Steel

Numerical Simulation to Study the Effect of Arc Travelling Speed and Welding Sequences on Residual Stresses in Welded Sections of New Ferritic P92 Pipes

2016 ◽  
Vol 35 (2) ◽  
pp. 121-128 ◽  
Author(s):  
Xiaowei Wang ◽  
Jianming Gong ◽  
Yanping Zhao ◽  
Yanfei Wang ◽  
Zhiqiang Ge
Keyword(s):  
Residual Stresses ◽  
Power Plants ◽  
Small Diameter ◽  
Good Combination ◽  
Thick Wall ◽  
P92 Steel ◽  
Welding Technology ◽  
Symmetrical Distribution ◽  
Mechanical And Physical Properties ◽  
Welding Sequences

AbstractNew ferritic P92 steel is widely used in modern power plants due to its good combination of mechanical and physical properties. However, cracks are often formed in the welded sections during the fabrication or service. In order to ensure the structure integrity, the effects of residual stresses need to be considered. The objective of this paper is to investigate the influence of arc travelling speed and welding sequences on the residual stresses distribution in the welded sections of P92 pipes by finite element method (FEM). Results show that arc travelling speed and welding sequences have great effects on residual stresses distribution. With the arc travelling speed increasing, the residual stresses increase. Meanwhile, welding sequences of case B present smaller residual stresses and more symmetrical distribution of residual stresses at the weld centre line. Therefore, using slower arc travelling speed and case B welding sequences can be useful to decrease the residual stresses, which provides a reference for optimizing the welding technology and improving the fabrication process of new ferritic P92 welded pipes with small diameter and thick wall.

Development of Small Diameter and Thin-Walled Tube Docking Girth Joint Ultrasonic Testing Probe and Block

2018 ◽  
Author(s):  
Lu-yun Zhou ◽  
Ming-hai Fu ◽  
Wei-pu Xu
Keyword(s):  
Ultrasonic Testing ◽  
Dead Zone ◽  
Sheet Steel ◽  
Small Diameter ◽  
Steel Tube ◽  
Test Block ◽  
Thin Wall ◽  
Ultrasonic Scattering ◽  
Thin Walled Tube ◽  
Thin Walled

Due to the Small diameter and thin walled tube docking girth joint ultrasonic testing has the problems of: dead zone is often greater than the wall thickness; large curvature of the pipeline causes ultrasonic scattering, greatly reduces the sensitivity; pipe weld root’s is not welded and so on. In this paper, the prepared small-bore and sheet steel tube docking girth joint ultrasonic testing probe has sufficient sensitivity, is less than 2.5mm of initial pulse width, short front (≤ 5mm), high resolution, less clutter, less surface wave components, At the same time, the test block was designed and used for the testing of probe’s related technical indicators, the test block can meet the focus probe’s performance and scanning sensitivity calibration. Combined with the field detection and compared with the radiographic testing, the ultrasonic testing obtain good result. It is suitable for the ultrasonic quantitative testing of the joint ring weld of thin wall pipe.

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