I'm pretty certain that Vulcan jet pipes were lagged with Refrasil, asbestos free. I thought that was in common usage. https://www.sglgroup.com/cms/international/products/product-groups/cm/refrasil/index.html?__locale=en
Last edited by GOLF_BRAVO_ZULU; 27th Aug 2018 at 10:06.
Reason: Typo