Welded Construction Design of Transition Fittings from Metal Pipes to Plastic Pipes

Metals

Ionela Rotaru¹  Ioan Bondrea¹  Dan Dobrotă¹ 

[1] Faculty of Engineering, Lucian Blaga University of Sibiu, 550024 Sibiu, Romania;

关键词: design;    welded construction;    constructive optimization;    transition fitting;    finite element method;   

DOI  :  10.3390/met10091231

来源: DOAJ

【 摘 要 】

Transition type fittings are components often used in facilities where fluids are transported that allow the passage from a high density polyethylene (HDPE) pipe to a steel pipe. In the presented studies, four types of transition fittings were analyzed in the first stage. The four types of transition fittings are distinguished by the shape of their welded steel construction. The performed analyses took into account testing the behavior upon exposure to fatigue, measuring the HDPE hardness and applying the finite element method (FEM). As a result of these studies it was demonstrated that the form of the welded steel construction has a very great influence on the operating behavior of the transition fitting. Thus, a new transition fitting with a welded steel construction was designed. In this new type of transition fitting, an approximately 50% increase in resistance to fatigue stress, an approximately 90% reduction in stress in the part material and a reduction in the hardness of the material in HDPE pipes was obtained. The studies allow not only an improvement of the characteristics for these types of parts, but also the optimization of other types of steel-plastic joints.

【 授权许可】

Unknown