Stainless steel backups in Hammer Union seals enhance durability in corrosive environments, using 316 SS for chloride resistance in offshore platforms. Paired with FKM for Fig. 2002, they handle 20,000 psi and 350°F in acidizing lines. The backup's interlocking teeth grip the elastomer, preventing blowout during pressure surges. JST's SS-reinforced seals pass NACE TM0177 for 720-hour ... https://globalsealstech.com/product/hammer-union-seal-2/