Structural integrity assessment of pipe elbows: Burst test and finite element analysis

IF 3 2区工程技术 Q2 ENGINEERING, MECHANICAL

International Journal of Pressure Vessels and Piping Pub Date : 2024-10-24 DOI:10.1016/j.ijpvp.2024.105339

Suria Devi Vijaya Kumar , Saravanan Karuppanan , Veeradasan Perumal , Mark Ovinis

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Abstract

In this study, the failure pressures of pipe elbows were compared with those predicted using Level 3 numerical assessment method (Finite Element Method). Four 90-degree pipes elbows representing a pristine pipe, a pipe with a single corrosion defect, a pipe with longitudinally aligned interacting defects, and a pipe with a circumferentially aligned interacting defects, were subjected to internal pressure based on the ASME B31.3–2012 Burst Test standard until failure. The Sch-80 pipes were made of ASTM A234 WPB steel with a wall thickness and bending radius of 12.7 mm and 305 mm respectively. The corrosion defects were simulated on the exterior surface of the pipe elbows using computer numerical control (CNC) machine to generate a machined version of the corrosion defect. The results revealed that corrosion defects significantly reduce the burst pressure of pipe elbows, with longitudinally aligned interacting defects causing the largest reduction of 20.9 % compared to pristine pipe. The comparison between the Level 3 numerical assessment method and burst test showed close agreement with a maximum difference of 4.79 %, confirming the accuracy and reliability of the numerical method.

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管道弯头的结构完整性评估：爆破试验和有限元分析

在这项研究中，管道弯头的失效压力与使用三级数值评估方法（有限元法）预测的失效压力进行了比较。根据 ASME B31.3-2012 爆破试验标准，对四根 90 度弯管进行了内压试验，直至其失效，这四根弯管分别代表原始管材、带有单一腐蚀缺陷的管材、带有纵向排列的相互作用缺陷的管材和带有圆周排列的相互作用缺陷的管材。Sch-80 管道由 ASTM A234 WPB 钢制成，壁厚和弯曲半径分别为 12.7 毫米和 305 毫米。使用计算机数控（CNC）机床在弯管外表面模拟腐蚀缺陷，生成腐蚀缺陷的机加工版本。结果显示，腐蚀缺陷显著降低了弯管的爆破压力，与原始管道相比，纵向排列的相互作用缺陷导致的爆破压力降低幅度最大，达到 20.9%。三级数值评估方法与爆破试验之间的比较显示两者接近，最大差异为 4.79%，证实了数值方法的准确性和可靠性。

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来源期刊

International Journal of Pressure Vessels and Piping 工程技术-工程：机械

CiteScore

5.30

自引率

13.30%

发文量

208

审稿时长

17 months

期刊介绍： Pressure vessel engineering technology is of importance in many branches of industry. This journal publishes the latest research results and related information on all its associated aspects, with particular emphasis on the structural integrity assessment, maintenance and life extension of pressurised process engineering plants. The anticipated coverage of the International Journal of Pressure Vessels and Piping ranges from simple mass-produced pressure vessels to large custom-built vessels and tanks. Pressure vessels technology is a developing field, and contributions on the following topics will therefore be welcome: • Pressure vessel engineering • Structural integrity assessment • Design methods • Codes and standards • Fabrication and welding • Materials properties requirements • Inspection and quality management • Maintenance and life extension • Ageing and environmental effects • Life management Of particular importance are papers covering aspects of significant practical application which could lead to major improvements in economy, reliability and useful life. While most accepted papers represent the results of original applied research, critical reviews of topical interest by world-leading experts will also appear from time to time. International Journal of Pressure Vessels and Piping is indispensable reading for engineering professionals involved in the energy, petrochemicals, process plant, transport, aerospace and related industries; for manufacturers of pressure vessels and ancillary equipment; and for academics pursuing research in these areas.