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Andrew B. Duffy, Inc. is pleased to announce the successful completion of our ASME and National Board Joint Review for Renewal of our ASME Code U Stamp (#4796 ) and National Board R  Stamp (#1131) Certificates of Authorization for our application of the ASME U STAMP, The NB R STAMP, and the NB STAMP on ASME Code Section VIII, Division 1 Unfired Pressure Vessels.  As a result of this intensive audit, conducted every three years, our Certificates of Authorization and Stamps applicable to pressure vessel fabrication, alteration and repair are renewed until March 30, 2020.
Please read the full announcement here


From the simplest bracket or clip to the most complex Pressure Vessel, Skid-mounted system or Welding requirement, we are ready to apply our materials, equipment and experienced personnel to meet the challenge! Take a look at some of our past work.