Thermal Expansion

For topics on Class I and II passenger and freight operations more general in nature and not specifically related to a specific railroad with its own forum.

Moderator: Jeff Smith

Posts: 55
Joined: Sat Dec 31, 2011 6:22 pm

Thermal Expansion

Post by ConrailRailfan » Thu Oct 10, 2019 10:38 pm

Hi all, when thermal expansion occurs under high temps, how are the kinked rails repaired? Is it a similar process to initially installing the rail when it is heated to its stress level?


Posts: 90
Joined: Tue Aug 02, 2016 8:19 pm

Re: Thermal Expansion

Post by Mark0f0 » Sat Nov 16, 2019 11:16 pm

Wouldn't they unexpand when the temperatures return to normal?

Never heard of 'heating' rail when its installed. There are systems that create the welds for joining sections of continuously welded rail, that involve thermite. But there's no machine that installs rails "hot". High temperatures can cause geometric distortion of rail which can lead to temporary operating restrictions (ie: speed restrictions).

Return to “General Class I and II Discussion”