Session: CT-06-01 Elevated Temperature Behavior of Bolted Flange Joints

Paper Number: 103979

103979 - Temperature Variation in Each Component of the Bolted Flange Joint 

This study researches and monitors the temperature variation in each component of the bolted flange joint, taking into account the inner pipe temperature, gasket sealing element temperature, bolt temperature in three positions: top, middle and bottom.

The study also shows results with different flange / pipe insulation thickness and two types of bolt materials, ASTM A193 B7 and ASTM A320 B8M CL2.

The test unit temperature controller is set at a consistent heat up rate with a maximum temperature setting of 600 Deg F. Testing starts at ambient temperature and is taken up to the maximum set temperature recording the temperature of each thermocouple attached to the bolted flange joint every one minute.

Graphical results show the increase and cooldown in temperature of each component and further breaks down the temperature differences between the complete unit, inner pipe versus gasket sealing element, bolt temperature variation – top, middle and bottom of the bolt length.

Results will aid design and plant engineers to better understand how different types and thickness of pipe / flange insulation can affect the temperature variations in certain bolted flange components. Data from the study will also enable design engineers to understand the differences between inner pipe, gasket and bolt temperatures when calculating stresses and relaxation values in operation.

Presenting Author: Robert Taylor 3S Superior Sealing Services

Presenting Author Biography: Robert has worked in the gasket industry for over 20 years, starting his career as a test engineer at a manufacturer in the United Kingdom. He progressed to become technical manager, developing biaxally orientated PTFE materials, compressed sheet and semi-metallic gaskets. His extensive knowledge and experience of gasket development and technical specifications provided an opportunity to further his career in the industry in the United States of America. Now in his role as technical director at 3S Superior Sealing Services, he leads the department focusing on product development, continuous improvement and customer support. Through this work, Robert has written a number of technical papers focused on solutions and best practices for end users.

Authors:

Robert Taylor 3S Superior Sealing Services
Stefan Hufnagel Amtec North America, Inc