Flange Joint Assembly Considerations for Critical Service Connections

2006 ◽  
Author(s):  
Rod T. Mueller
Keyword(s):  
Quality Control ◽  
High Temperature ◽  
Bolted Joints ◽  
Flange Joint ◽  
Process Industries ◽  
Joint Assembly

Flange joints, especially in high temperature critical services, continue to represent one of process industry’s more significant challenges in achieving reliable leak-tight piping. The paper will provide guidelines to help the user categorize critical services where flange joints warrant particular attention in their assembly. Unlike welded piping joints, flange joints do not have specific assembly qualification procedures recognized by current piping or PV Codes. The paper presents an approach to flange assembly procedures and quality control to improve the reliability of critical service bolted joints. The importance of effective assembly crew training and qualifications will also be emphasized. While the techniques have evolved with petrochemical service applications, they would be of interest to other process industries where flange leakage is a key concern.

scholarly journals High Temperature Testing and Analysis of a Class 300 Bolted Flange Joint

2014 ◽  
Author(s):  
J. Adin Mann ◽  
Jeremy Hilsabeck ◽  
Cale Mckoon
Keyword(s):  
High Temperature ◽  
Bolted Joints ◽  
Flange Joint ◽  
Simulation Approach ◽  
High Temperature Testing ◽  
Material Creep ◽  
Fea Simulation ◽  
Bolted Flange ◽  
The Impact

When class 300 flange bolted joints are held at temperatures in the material creep range, it is documented that the bolt loads can relax. Tests and analysis are being performed with the goal of developing a validated FEA simulation approach to predicting the impact of creep on the bolt loads. The bolt load and gasket geometry are evaluated upon bolt up and after being heated to 1100 deg F. Tests are performed with and without a gasket to separate the impact of the gasket relaxation and flange material creep. The results of the tests and analysis approaches will be presented. Paper published with permission.

Bolted Flange Joint Assembly Service Provider Assessments

2018 ◽  
Author(s):  
Brett Thibodeaux ◽  
Scott Hamilton
Keyword(s):  
Service Provider ◽  
Chemical Process ◽  
Technical Information ◽  
Bolted Joint ◽  
Flange Joint ◽  
Process Industries ◽  
The Past ◽  
Bolted Flange ◽  
Joint Assembly ◽  
Chemical Process Industries

There have been two major updates to ASME PCC-1 “Guidelines for Pressure Boundary Bolted Flange Joint Assembly” within the past 7 years. In 2010, substantial technical information was added, and in 2013 Appendix A “Training and Qualification of Bolted Joint Assembly Personnel” was added to the document. This paper provides an overview of a program to review and evaluate bolting contractors that serve the refining and chemical process industries, based on their level of alignment with the requirements of ASME PCC-1 Appendix A, and describes a method of applying the results using a risk-based approach.

scholarly journals Solving the Puzzle of Bolted Joints

2011 ◽  
Vol 133 (06) ◽  
pp. 48-52
Author(s):  
Edward Hayman ◽  
Clyde Neely
Keyword(s):  
Best Practices ◽  
Bolted Joints ◽  
Bolted Joint ◽  
Flange Joint ◽  
Unit Load ◽  
Bolt Stress ◽  
Torque Values ◽  
Bolted Flange ◽  
Joint Integrity ◽  
Joint Assembly

This article discusses the various ways of solving the puzzle of bolted joint assembly. In 2001, The PCC-1-2000 Guidelines for Pressure Boundary Bolted Flange Joint Assembly presented with knowledge and practices specific to the assembly of bolted flange joints. The puzzle solution that came from this box was the most definitive to date and allowed those dealing with bolted joints to assemble the variables by methods that had been used successfully for many years by many people. This document is helping people across industry not only to assemble bolted flange joints, but also to establish joint integrity programs, procedures, and best practices. PCC-1-2010 shifts the emphasis to gasket stress and gasket type and provides instruction and information pertinent to bolt torque values. The 2010 document contains, for instance, a whole section on bolt stress—the unit load that should be put on the bolts—and includes tables as well.

INCONEL ALLOY 601

Alloy Digest ◽  
1970 ◽  
Vol 19 (4) ◽  
Keyword(s):  
Solid Solution ◽  
Fracture Toughness ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
Heat Treating ◽  
Solid Solution Alloy ◽  
Process Industries ◽  
Inconel Alloy ◽  
Nickel Chromium

Abstract INCONEL Alloy 601 is a nickel-chromium solid-solution alloy with excellent high-temperature properties which make it attractive for many application in aerospace and process industries. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as fracture toughness and creep. It also includes information on corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Ni-152. Producer or source: Huntington Alloy Products Division, An INCO Company.

Quality Control in the Process Industries.

1951 ◽  
Vol 43 (12) ◽  
pp. 2695-2703 ◽  
Author(s):  
John G. Dobson
Keyword(s):  
Quality Control ◽  
Process Industries

Application of Bolted Flange Joint Assembly Guidelines HPIS Z103 TR to ePTFE Sheet Gasket

2008 ◽  
Author(s):  
Hirokazu Tsuji ◽  
Yuuki Terui
Keyword(s):  
Relaxation Rate ◽  
Modulus Of Elasticity ◽  
Elastic Interaction ◽  
Flange Joint ◽  
Fiber Sheet ◽  
Force Reduction ◽  
Assembly Procedure ◽  
Bolted Flange ◽  
Application Scope ◽  
Joint Assembly

Bolt tightening guidelines HPIS Z 103 TR for flange joint assemblies have been developed to provide a simple and effective procedure to tighten flange joint bolts. This assembly procedure is applicable to compressed fiber sheet gaskets and spiral wound gaskets, but is not applicable to expanded PTFE (ePTFE) sheet gaskets for the reason that the ePTFE material has lower modulus of elasticity and higher creep/relaxation rate. In this study, expansion of the application scope of HPIS Z103 TR to ePTFE sheet gaskets is investigated. Tightening tests are conducted using flange joint specimens of JPI 4 inch and 6 inch, and all bolt forces and flange gaps are measured at each tightening step to check for uneven tightening. Uniformity of the bolt forces and flange gaps are comparable to those obtained by other types of gaskets or by tightening procedure ASME PCC-1. The influences of gasket relaxation and elastic interaction on the bolt forces are also demonstrated. As a result, flange joint assembly guidelines HPIS Z 103 TR can be considered applicable to the high-density ePTFE sheet gasket, although a post-tightening step of 1 or 2 passes is necessary to compensate for the bolt force reduction induced by gasket relaxation.

scholarly journals Thermal Mismatch Effect and High-Temperature Tensile Performance Simulation of Hybrid CMC and Superalloy Bolted Joint by Progressive Damage Analysis

2020 ◽  
Vol 2020 ◽  
pp. 1-14
Author(s):  
Shuyuan Zhao ◽  
Jianglong Dong ◽  
Chao Lv ◽  
Zhengyu Li ◽  
Xinyang Sun ◽  
...  
Keyword(s):  
Thermal Expansion ◽  
High Temperature ◽  
Transportation Systems ◽  
Bolted Joints ◽  
Failure Behavior ◽  
Progressive Damage ◽  
Damage Analysis ◽  
New Findings ◽  
Tensile Performance ◽  
High Temperature Tensile

The hybrid CMC and superalloy bolted joints have exhibited great potential to be used as thermostructural components of reusable space transportation systems, given the respective strengths of these two materials. In the high temperature excursion of the hybrid joints with the aircrafts and space vehicles, the substantial difference in thermal expansion coefficients of CMC and superalloy materials will induce complex superposition of initial assembly stress, thermal stress, and tensile stress around fastening area, which might lead to unknown failure behavior of joint structure. To address this concern, a finite element model embedded with progressive damage analysis was established to simulate the thermostructural behavior and high-temperature tensile performance of single-lap, single-bolt C/SiC composite and superalloy joint, by using the ABAQUS software. It was found that the initial stiffness of the CMC/superalloy hybrid bolted joints decreases with the rise of applied temperature under all bolt-hole clearance levels. However, the load-bearing capacity varies significantly with the initial clearance level and exposed temperature for the studied joint. The thermal expansion mismatch generated between the CMC and superalloy materials led to significant changes in the assembly preload and bolt-hole clearance as the high-temperature load is applied to the joint. The evolution in the thermostructural behavior upon temperature was then correlated with the variations in stiffness and failure load of the joints. The provided new findings are valuable for structural design and practical application of the hybrid CMC/superalloy bolted joints at high temperatures in next-generation aircrafts.

Sign in / Sign up

Export Citation Format

Share Document