Parker Hannifin”s Dual Seal Flange Adapters are designed to improve the reliability and safety of high-vibration, high-shock hydraulic four-bolt connections in critical subsea oil and gas applications. The adapters are an alternative to traditional SAE Code 62 Flanges and are available in standard Code 62 footprint sizes ½” (-8), one-inch (-16) and 1.5-inch (-24), the adapters incorporate both radial and face seal methods for improved port retention and increased sealing capacity. Together these technologies reduce the potential for system leakage and air/water ingression caused by side loading of conventional flange face seal connections, thereby reducing the likelihood of a costly field replacement due to failure. Primary radial seal improves working pressure rating in certain configurations. Parker has tested its adapters to 7,500 psi (515 bar) with a 4-to-1 design factor. Reliability at these system pressures was validated by conducting impulse testing for 1,000,000 cycles. The face seal, meanwhile, resists external environmental pressures. Parker added a captive o-ring groove to the traditional SAE J518 flange head. This design further reduces the potential for leaks by improving seal retention and eliminating o-ring related assembly errors. The flange head is conveniently interchangeable with commercially available flange components and hardware because it is patterned after ISO 6162/SAE J518 flange bolt design. The adapters are NACE MR0175 compliant (National Association for Corrosion Engineers; “Materials for use in H2S-containing environments in oil and gas production”). They are constructed from SAE 316/316L stainless steel and are fully Heat Code Traceable. Both the radial seal and face seal O-rings are Nitrile 90 durometer.