Approach for the Dimensioning of Bolted Joint Connections With Threaded Flanges for High Pressure Applications

Volume 5: High-Pressure Technology; ASME Nondestructive Evaluation, Diagnosis and Prognosis Division (NDPD); Rudy Scavuzzo Student Paper Symposium and 26th Annual Student Paper Competition Pub Date : 2018-07-15 DOI:10.1115/PVP2018-84613

Matthias Bortz, David Fuenmayor, R. Wink

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Abstract

High pressure flange connections for LDPE plants are commonly designed using lens ring gaskets and bolted flange connections. The rules given in the ASME Code Sections B31.3, VIII Div. 2 or VIII Div. 3 for bolted-flange joints offer no guidance for the calculation of threaded flanges. In this paper, an approach is presented that considers internal pressure and external loads on a flange connection and fulfills the requirements of ASME Section VIII Div.3 and ASME B31.3. Of specific interest is the dimensioning of bolts due to the bending moment with a method that avoids the over-conservatism of the rules given in ASME VIII Div.2 and ASME B31.3. Furthermore, a simplified calculation for threaded flanges considering the stress classification and stress limits given in ASME VIII Div. 3 and using Finite Element Analyses is described.

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高压用带螺纹法兰的螺栓连接的尺寸确定方法

LDPE设备的高压法兰连接通常采用透镜环垫圈和螺栓法兰连接设计。ASME规范第B31.3、VIII Div. 2或VIII Div. 3节中关于螺栓-法兰连接的规则对螺纹法兰的计算没有指导。本文提出了一种考虑法兰连接内部压力和外部载荷的方法，满足ASME Section VIII Div.3和ASME B31.3的要求。需要特别注意的是螺栓的弯矩尺寸，该方法避免了ASME VIII Div.2和ASME B31.3中规定的过度保守性。此外，考虑ASME VIII Div. 3中给出的应力分类和应力极限并使用有限元分析，描述了螺纹法兰的简化计算。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Volume 5: High-Pressure Technology; ASME Nondestructive Evaluation, Diagnosis and Prognosis Division (NDPD); Rudy Scavuzzo Student Paper Symposium and 26th Annual Student Paper Competition

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