Hydrogen service adds new RGD challenges. At 15,000 psi H₂, decompression rates can exceed 100 bar/min. Special low-permeability HNBR grades with graphene barriers reduce hydrogen uptake by 80 %, surviving 20 cycles without cracking. These are now specified for blue hydrogen production wells and storage caverns. https://globalsealstech.com/product/rgd-rapid-gas-decompression-o-rings/