Double Studded Adapter Flanges

A Double Studded Adapter (DSA) is commonly used to connect flanges with different nominal sizes, pressure ratings, and configurations. For example, a DSA can be used to connect an API 6A 7 1/16 10M flange to an API 6A 5 1/8 5M flange. Although most commonly used to connect API 6A style flanges, WeldFit can design and manufacture DSA's for any combination of API, ASME, MSS and other flange styles.

Key Features:

  • 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
  • Manufactured in compliance with WeldFit’s ISO 9001:2008 certified quality program

Ordering Information:

  • Nominal size, pressure rating and configuration of each flange
  • API 6A temperature classification or minimum/maximum design temperature
  • API 6A material classification or required material
  • Required thickness, if non-standard
  • Corrosion resistant alloy material, if required — common CRA materials are 316L Stainless Steel and Inconel 625

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