International Journal of Pressure Vessels and Piping最新文献

{"title":"Evolution behavior of residual contact pressure of hydraulic expanded joints with groove in steam generator under creep conditions","authors":"Guo-Peng Lin ,&nbsp;Fu-Hai Gao ,&nbsp;Jian-Guo Gong ,&nbsp;Fu-Zhen Xuan","doi":"10.1016/j.ijpvp.2025.105510","DOIUrl":"10.1016/j.ijpvp.2025.105510","url":null,"abstract":"<div><div>The hydraulic expanded joint with grooves (HEJ-G) is a critical zone in steam generators, and the creep action may impact the residual contact pressure and the joint performance. However, the evolution behavior of the residual contact pressure of the HEJ-G under creep conditions is rarely reported. Based on this, this work addressed the evolution behavior of the residual contact pressure of the HEJ-G in steam generator. A three-dimensional finite element model was developed to simulate the creep behavior of the joints. The distribution and evolution behaviors of the contact pressure and the axial strength for different expanding pressures were discussed. The influence of the tube-side pressure on the average contact pressure of the joints was reported. The results indicated that the residual contact pressure values in various regions decrease in the creep exposure time. The evolution behaviors of the contact pressure of the joint are dependent on the expanding pressure. The remarkable stress relaxation or stress re-distribution can happen, and the steady-state stress level is related to the positions. The tube-side pressure can strength the contact effect between the tube and the tubesheet, resulting from the radial deformation of the tube. The enhancement of the contact pressure increases with the expanding pressure.</div></div>","PeriodicalId":54946,"journal":{"name":"International Journal of Pressure Vessels and Piping","volume":"216 ","pages":"Article 105510"},"PeriodicalIF":3.0,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143679373","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Quantitative identification of small defects in pipes using ultrasonic guided waves and synchronized Lorenz equations","authors":"Mengfei Cheng ,&nbsp;Hongzhao Li ,&nbsp;Weiwei Zhang ,&nbsp;Hongwei Ma","doi":"10.1016/j.ijpvp.2025.105508","DOIUrl":"10.1016/j.ijpvp.2025.105508","url":null,"abstract":"<div><div>Defect quantification and signal processing is the important and fundamental problems in ultrasonic guided wave inspection of pipelines. However, the existing methods struggle to accurately identify low SNR guided wave and quantify defects. To overcome this disadvantage, a quantitative detection of small defect in pipeline using synchronized Lorenz equations and guided wave was proposed. Firstly, a method for the quantification and localization of small defects in pipes was developed using the relationship between reflection coefficients, section loss rates and signal amplitudes. Then, two synchronized Lorenz equations were constructed to identify small defects echo. Theoretical derivation and simulation studies showed that the synchronization error can accurately identify the amplitude and peak arrival time of guided waves under strong noise. Finally, experimental research on guided waves inspection of pipeline showed that it could quantitatively identify a pipe small defect with a section loss rate of 2 %. The errors in the defect size and location identification were less than 5 % and 2 %, respectively. Compared to existing study, this study improved the sensitivity of guided waves inspection for the small defect in pipe and its applicability under noise interference.</div></div>","PeriodicalId":54946,"journal":{"name":"International Journal of Pressure Vessels and Piping","volume":"216 ","pages":"Article 105508"},"PeriodicalIF":3.0,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143679380","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Creep behavior and microstructure evolution of creep cavities in the heat-affected zone of P92 steel joints","authors":"Chao Yang ,&nbsp;Renqiang Shi ,&nbsp;Jian Qiao","doi":"10.1016/j.ijpvp.2025.105512","DOIUrl":"10.1016/j.ijpvp.2025.105512","url":null,"abstract":"<div><div>The Type IV fracture of P92 steel joints is characterized by the aggregation of micro-cavities leading to creep cracking, which presents a significant risk to the operational safety of P92 steel pipelines in ultra-supercritical plants. Consequently, it is essential to examine the evolution of creep cavities in the heat-affected zone of joints to provide early warning of potential cracking risks. This study characterized the hardness, microstructures, and electron backscatter diffraction (EBSD) images for two different P92 steel joints exhibiting Type IV fracture, as well as for a P92 steel joint without fracture. By building upon the understanding of creep damage mechanisms in homogeneous materials and integrating practical observations from P92 steel pipeline joint failures, we elucidated the microstructural evolution of creep cavities within the heat-affected zone of these heterogeneous materials using a micromechanics-based model. Our findings indicate that the nucleation of creep cavities varies across different regions of the joint, influenced by their distinct creep characteristics. Additionally, the growth of these cavities is regulated by the hydrostatic stress and stress triaxiality factor, while cavity coalescence is primarily governed by axial stress. To mitigate Type IV fracture, it is crucial to enhance creep resistance in the heat-affected zone and minimize axial stress levels.</div></div>","PeriodicalId":54946,"journal":{"name":"International Journal of Pressure Vessels and Piping","volume":"216 ","pages":"Article 105512"},"PeriodicalIF":3.0,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143631856","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis of thermal autofrettage for functionally graded thick-walled cylinders","authors":"Mohit Rajput ,&nbsp;S.M. Kamal ,&nbsp;R.U. Patil ,&nbsp;S. Deka","doi":"10.1016/j.ijpvp.2025.105505","DOIUrl":"10.1016/j.ijpvp.2025.105505","url":null,"abstract":"<div><div>In recent times thermal autofrettage has been revealed to be a potential procedure for strengthening thick-walled cylindrical pressure vessels. The process is well-demonstrated for homogeneous solids both theoretically and experimentally. Due to the increasing trend of using functionally graded cylinders in industries, this paper endeavours to explore the applicability of thermal autofrettage to functionally graded cylinders for the first time. A theoretical approach is made to investigate the development of stresses during thermal autofrettage of a thick-walled cylinder made with functionally graded material. Under the application of a through thickness temperature gradient to the functionally graded cylinder, the loading stage of thermal autofrettage is modelled to exhibit elastic-perfectly plastic behaviour incorporating von Mises yield criterion. The cylinder end condition is assumed to be open-ended conforming generalized plane strain condition. The in-loading thermo-elastic-plastic stress formulation is carried out and post-unloading of temperature gradient, the residual stresses induced in the cylinder are evaluated. The current process is exemplified for a typical FG cylinder composed of aluminium alloy (Al A359) and silicon carbide (SiC). The analysis reveals that a significant amount of compressive residual stresses of the order of 0.99 times the yield strength at the inner radius can be induced by thermal autofrettage in FG cylinder which enhances its pressure carrying capacity. For instance, in the present Al A359/SiC FG cylinder of wall thickness ratio 3, the maximum achievable pressure carrying capacity is nearly 40 %.</div></div>","PeriodicalId":54946,"journal":{"name":"International Journal of Pressure Vessels and Piping","volume":"216 ","pages":"Article 105505"},"PeriodicalIF":3.0,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143644317","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study on the evolution mechanism and influencing factors of CO2 corrosion product film under pipe flow","authors":"Min Qin ,&nbsp;Sijia Chen ,&nbsp;Nan Ye ,&nbsp;Yihang Chen ,&nbsp;Shijian Zhang ,&nbsp;Ke Li ,&nbsp;Kexi Liao","doi":"10.1016/j.ijpvp.2025.105506","DOIUrl":"10.1016/j.ijpvp.2025.105506","url":null,"abstract":"<div><div>CO₂ corrosion constitutes a common form of corrosion in oil and gas pipelines. The presence of elevated concentrations of CO₂ in produced water from oil and gas fields has the potential to cause significant corrosion of pipelines and associated equipment, resulting in substantial economic losses. This paper presents the findings of an experimental study of CO₂ corrosion at different flow rates and times. It analyses the mechanism by which CO₂ corrosion products evolve over time at various flow rates, utilizing a combination of characterization techniques, including electrochemical testing, scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS) and X-ray diffraction (XRD). The experimental setup is an independently designed gas-liquid two-phase flow loop system. The results demonstrate that the flow rate exerts a significant influence on the integrity of the corrosion products. As the flow rate increases, the corrosion rate of the 20# steel initially rises before subsequently declining. The formation and evolution of CO₂ corrosion products under static conditions can be divided into four main stages: the diffusion of the corrosive medium, substrate dissolution, the formation of the product film and continued corrosion. Nevertheless, the flow rate exerts an influence on the formation and integrity of the corrosion product film. At 0.75 m/s, the corrosion behavior is characterized by accelerated corrosion. At 1.2 m/s, the corrosion behavior is characterized by alternating cycles of accelerated corrosion product deposition → erosion damage → accelerated corrosion product deposition → erosion damage.</div></div>","PeriodicalId":54946,"journal":{"name":"International Journal of Pressure Vessels and Piping","volume":"216 ","pages":"Article 105506"},"PeriodicalIF":3.0,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143679377","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Prediction of crack growth behavior after a single tensile overload using the effective stress intensity factor and artificial neural networks","authors":"Anindito Purnowidodo,&nbsp;Redi Bintarto,&nbsp;M.A. Choiron","doi":"10.1016/j.ijpvp.2025.105504","DOIUrl":"10.1016/j.ijpvp.2025.105504","url":null,"abstract":"<div><div>This study presents an artificial neural networks (ANN) Model for predicting fatigue crack growth behavior under variable amplitude loads, specifically for negative and zero stress ratios with a single tensile overload. Using the effective stress intensity factor (<em>ΔK</em>_<em>eff</em>) as the primary input, the ANN Model estimates crack growth and fatigue life based on known crack length and increments. Results show that the Model provides accurate predictions of <em>ΔK</em>_<em>eff</em> and crack growth behavior across various loading conditions. The ANN approach offers a practical tool for assessing fatigue life in engineering applications, even with limited datasets.</div></div>","PeriodicalId":54946,"journal":{"name":"International Journal of Pressure Vessels and Piping","volume":"216 ","pages":"Article 105504"},"PeriodicalIF":3.0,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143611737","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Characterization of multi defects in buried pipelines using coded excitation nonlinear chirp T (0,1) mode ultrasonic guided waves","authors":"Xulei Zang,&nbsp;Zhao-Dong Xu,&nbsp;Haoyan Peng,&nbsp;Zhiheng Xia,&nbsp;Hongfang Lu","doi":"10.1016/j.ijpvp.2025.105503","DOIUrl":"10.1016/j.ijpvp.2025.105503","url":null,"abstract":"<div><div>Ultrasonic guided waves are widely used in the nondestructive testing (NDT) of aboveground pipelines. However, their application in buried pipeline inspection is significantly hindered by severe soil-induced attenuation. This study proposes a method for detecting defects in buried pipelines using nonlinear chirp signals encoded with orthogonal complementary Golay code pairs. By adjusting the proportion of low-frequency and high-frequency components in the excitation signal, the attenuation of guided waves in buried pipelines is effectively reduced. Meanwhile, the use of coded sequences increases the energy of the excitation signal, and the excellent autocorrelation properties of broadband signals enhance the time-domain resolution of defect echoes. The fundamental principles of coded excitation based on nonlinear chirp signals and pulse compression methods are first introduced. MATLAB simulations are then employed to verify the approach's effectiveness in the characterization of defect echoes under various conditions and signal-to-noise ratios (SNR). A subsequent comparative analysis, using finite element (FE) simulations for buried pipelines, demonstrates that nonlinear chirp signals with a higher proportion of low-frequency components exhibit better resistance to attenuation. By fine-tuning the chirp parameters, higher defect reflectivity can be achieved than with conventional tone bursts for various defect types in buried pipelines. FE simulations further illustrate the superiority of the proposed method over tone bursts in terms of excitation signal amplitude, defect echo reflectivity, and defect location accuracy. Finally, defect detection experiments on buried pipelines with multiple defects confirm that the nonlinear chirp signals with carefully selected parameters exhibit lower attenuation rates. In the same testing environment, the coded nonlinear chirp signals outperform tone bursts by providing higher excitation amplitudes, greater defect echo reflectivity with an increase of up to 81.45 percent, and enhanced time-domain resolution. The proposed method effectively reduces ultrasonic guided wave attenuation in buried pipelines while increasing defect echo reflectivity and extending the effective detection range.</div></div>","PeriodicalId":54946,"journal":{"name":"International Journal of Pressure Vessels and Piping","volume":"216 ","pages":"Article 105503"},"PeriodicalIF":3.0,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143593243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigation of the evolution of welding residual stress in A350-LF2 steel multi-layer and multi-pass joint","authors":"Yan song Zhu ,&nbsp;Wei Huang ,&nbsp;Xing nong Wei ,&nbsp;Tao Feng ,&nbsp;Ya feng He ,&nbsp;Tae Jo Ko","doi":"10.1016/j.ijpvp.2025.105501","DOIUrl":"10.1016/j.ijpvp.2025.105501","url":null,"abstract":"<div><div>For multi-layer and multi-pass welding (MMW), two different structural layers, including the upper fine-grained layer caused by the reheating effect of the subsequent weld passes and the lower coarse-grained layer determined by the peak temperatures of the current thermal cycle, are likely to generate in most weld passes (except for the final one). In this study, to explore the formation and evolution of the welding residual stress (WRS) in MMW joint, a finite element model considering the thermo-metallurgical-mechanical interaction effects was developed to calculate WRS. Then a novel heat conduction model was proposed to quantitatively estimate the reheating effect. The effectiveness of the above models was verified by the experimental measurements. Then Satoh test was further performed to explore the effects of the peak temperature, phase transformation, and reheating on WRS evolution. The results demonstrate that the formation of WRS in MMW joint is similar to a multilayer residual stress stacking, which is mainly influenced by not only the peak temperature of the welding thermal cycle but also the reheating effect of the weld passes and consequent phase transformation. In the event of‌ the peak temperature of the welding thermal cycle being in the range of Ac1 to Ac3, the mixture phase with relatively higher yield strength tends to be generated in the reheated layer in weld passes, as a result, the welding residual tensile stress in MMW joint can be decreased.</div></div>","PeriodicalId":54946,"journal":{"name":"International Journal of Pressure Vessels and Piping","volume":"216 ","pages":"Article 105501"},"PeriodicalIF":3.0,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143578561","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A study of creep rupture life prediction for P91 steel with machine learning method: Model selection and sensitivity analysis","authors":"Jie Chen ,&nbsp;Xinbao Liu ,&nbsp;Lin Zhu ,&nbsp;Ping Fan ,&nbsp;Hongtao Chen ,&nbsp;Yuxuan Xie ,&nbsp;Lingxin Yue","doi":"10.1016/j.ijpvp.2025.105494","DOIUrl":"10.1016/j.ijpvp.2025.105494","url":null,"abstract":"<div><div>The present work dealt with the long-term creep rupture life of P91 steel using the machine learning method. In order to achieve the reliability evaluation, different machine learning algorithms were selected to train the test data of P91 steel, respectively. In particularly, a large model utilizing the creep data of different types of P91 steel was proposed to improve the relatively large error in the direct prediction. The results revealed that in contrast to other models, the predicted long-term creep rupture life of P91 steel with a relative error of less than 4 % was obtained with the multi-layer perceptron algorithm. Moreover, sensitivity analyses suggested that the predicted creep rupture life was strongly dependent on input factors, such as the chemical composition and heat-treatment condition. Additionally, the proposed machine learning framework not only provided the reliable creep rupture life prediction, but also offered a potential tool for material engineers to design and produce the high-performance P91 steel.</div></div>","PeriodicalId":54946,"journal":{"name":"International Journal of Pressure Vessels and Piping","volume":"216 ","pages":"Article 105494"},"PeriodicalIF":3.0,"publicationDate":"2025-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143593244","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation of thermal damage and mechanical properties of P91 steel in service using nonlinear ultrasonic waves","authors":"Jianxun Li ,&nbsp;Zihao Zheng ,&nbsp;Minghang Wang ,&nbsp;Yide Li ,&nbsp;Mingya Chen ,&nbsp;JunLei Wang ,&nbsp;Weiqiang Wang","doi":"10.1016/j.ijpvp.2025.105502","DOIUrl":"10.1016/j.ijpvp.2025.105502","url":null,"abstract":"<div><div>Pressure vessels and high-temperature pipelines inevitably experience thermal damage and mechanical property degradation under high-temperature and high-pressure service conditions. Using P91 steel specimens subjected to long-term high-temperature (HT) service as the research subject, this study employs nonlinear ultrasonic testing (NUT) technology to propose a rapid and accurate uniaxial mechanical property evaluation method. The influence of thermal damage on the ultrasonic nonlinear parameter and its response mechanism in P91 steel during prolonged high-temperature service was investigated by using a NUT system on P91 steel specimens with varying degrees of thermal damage. Analysis of the variation of the nonlinear parameter revealed that the ultrasonic nonlinear parameter first increases, then decreases, and then increases again with the duration of high-temperature service. This study introduces a cumulative ultrasonic nonlinear coefficient and establishes a mapping relationship model between the high-temperature mechanical property degradation of P91 steel and the cumulative ultrasonic nonlinear coefficient, thereby enabling the rapid assessment of the mechanical properties of P91 steel in long-term high-temperature service using NUT. The validity of this mapping relationship was confirmed through conventional tensile tests. The results demonstrate that the error between the yield strength and tensile strength calculated based on nonlinear ultrasonic technology and the tensile test results is within 10 %, meeting engineering application requirements.</div></div>","PeriodicalId":54946,"journal":{"name":"International Journal of Pressure Vessels and Piping","volume":"216 ","pages":"Article 105502"},"PeriodicalIF":3.0,"publicationDate":"2025-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143578562","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}