API SPEC 16RCD pdf download Rotating Control Devices 4.3.2.4Other Elastomeric Materials For nonmetallic materials not covered by 4.3.2.2，nonmetallic materials shall be designed to operate withinthe temperatures of the manufacturer’s written specifications.Manufacturers shall specify the operating fluidenvironment (liquid, gas, or multiphase) and compatibility for the seals. 4.3.3 Retained Fluid Ratings Metallic materials that come in contact with well fluids shall meet...