I work in a lab with vacuum systems that get heated and cooled and we just have segments of flexible bellows like this: http://www.pchemlabs.com/subcatagoryb.a

I work in a lab with vacuum systems that get heated and cooled and we just have segments of flexible bellows like this: http://www.pchemlabs.com/subcatagoryb.asp?pid=flexible-bellows http://www.pchemlabs.com/subcatagoryb.asp?pid=flexible-bello... Not sure if the same thing will work at larger scales, but I'm not sure its a fundamental problem.