Comparative Analysis of Current International Standards for Calculations Flanges Joint with Gasket Inside the Circle Location of the Bolt Holes

Georgeta Roman (Urse)

doi:10.37358/rc.20.3.7963

Abstract

This paper presents the comparative analysis of the existing international normative calculation (EN 13445-3 European, ASME-Code, Section VIII, British Standard (PD 5500: 2009)) on the flange gasket joint situated inside the circle location of the bolt holes. The comparative analysis was performed for the same type of flange. The paper presents a comparative study of American and European standard, in terms of cost of production for the pressure equipment to assess the strengths and weaknesses of these regulations.

Highlights

Why did I started comparative analysis for the standards? Because the analysis performed in specialized literature [1] it was found that there may be differences between the normative technically and economically
In the [1] study the analysis was performed for nine pressure Vessels to show technical and economic advantages or disadvantages for applying standards (EN 13445 DBF, ASME VIII Division 1 (Code stamp), ASME VIII Division 1 (CE))
The comparative analysis of current international normative calculation was made for joint flanges with gasket located inside the circle on which are located tensioning bolts for the gasket

Summary

1.Introduction

Why did I started comparative analysis for the standards? Because the analysis performed in specialized literature [1] it was found that there may be differences between the normative technically and economically. The comparative analysis of current international normative calculation was made for joint flanges with gasket located inside the circle on which are located tensioning bolts for the gasket Treats the flanges joint for gasket are arranged inside bolt circle (dg,ext < D2); the flanges bend under the influence of moments with flanges according to normative refers on only two cases, namely: - at environment condition, T=T0 and P=P0; - in operating condition at T = Ts and P=Pc (Pc - the calculation pressure, Ts - the bolt temperature), but at temperatures below the creep temperature. 1. Integral Type Flange or Loose Type Flange with a Hub: a) Flange hub stress: SH f Mo L g12 B (13)

Reverse Integral Type Flange or Reverse Loose

Reverse Loose Type Flanges without a Hub:

2.Conclusions