One of the major challenges in working with LNG (liquefied natural gas) is transporting it. LNG is stored and transferred at cryogenic temperatures which can be a major challenge when it comes to designing seals.
Guidelines for Machining PEEK, PAI and Other Advanced Polymers
Annealing
Machining and finishing of high temperature polymer materials can release residual stress. It is recommended that a second annealing is performed on the semi-finished stock prior to the machining process. Annealing can limit dimensional changes, remove stress, and increase levels of crystallininty.