Product Description Double stud adapters (DSA) are commonly used to connect flanges with different nominal sizes, pressure ratings and configurations. Yulin Double Studded Adaptor is also called adaptor flange, which is designed as per API 6A and API Spec Q1. It is the flange to connect different size flange. Features It can be used to connect flanges with any combination of sizes and pressure ratings Custom DSA's are available to transition between API, ASME, MSS or other styles of flanges Supplied with standard or customer-specific thicknesses Normally provided with tap-end studs and nuts Available for general service and sour service in compliance with any temperature rating and material requirements specified in API Specification 6A Available with Stainless Steel 316L or Inconel 625 corrosion-resistant ring grooves