How does rapid gas decompression (RGD) affect polymer and elastomer seals in the context of hydrogen gas transport?

Introduction

Rapid gas decompression (RGD) is a phenomenon that may impact polymer and elastomer seals in the context of hydrogen gas transport. During high-pressure operation, hydrogen can be absorbed into polymeric materials, and when the system pressure decreases, the diffusion of hydrogen out of the material may not occur quickly. This can lead to the formation of gas pockets, causing mechanical damage such as blistering.

Answer

Rapid gas decompression (RGD) can affect polymer and elastomer seals used in hydrogen gas transport. When hydrogen molecules are absorbed into polymeric materials during high-pressure operation, they may not diffuse out rapidly upon pressure reduction. As a result, gas pockets can form, potentially leading to mechanical damage like blistering. It is important to consider the specific characteristics and behavior of hydrogen in polymer and elastomer materials to assess and mitigate the risk of RGD in hydrogen gas transport applications.