Quality Assurance

Doerfer Companies follows customer determined guidelines and expectations in the manufacture and assembly of custom automation components and provides unmatched program and personnel excellence.


Doerfer has been audited to the requirements of federally mandated quality programs and successfully complies with all directives, ensuring unequaled quality assurance.


Certificates of Authorization

  • ASME B&PV Code U, U2 and S Stamps

  • R and NB Stamps (The National Board)

  • Erect, Repair and Alter Boilers & Pressure Vessels (State of Tennessee)


Personnel Certifications

  • ASNT (Levels 1 & 2)

  • AWS-D1.1, D1.2, D1.6, D1.9

  • AWS-CWI

  • ASME Code Section IX

    • Qualified Welders/Operators

    • Qualified Welding Procedures

  • VT Electrical Inspectors

  • CQE

  • CQT

  • CMI

  • CCT

  • CQA

    • ANSI-N45 2.23 - Auditors/Lead Auditors


Regulatory Compliance

  • FDA

    • 21 CFR 210

    • 21 CFR 211

    • 21 CFR 820

    • 21 CFR Part 11

  • GAMP 4/5: ISPE

  • ISO 9001 Compliant

  • NQA-1

    • 10 CFR 50 Appendix B

    • Regulatory Guide 1.28

    • 10 CFR 72 Subpart G

    • 10 CFR 71 Subpart H

    • 10 CFR 830 Subpart A

    • DOE Order 414.1C

    • DOE/RW-0333P Rev. 13

    • NCA-3800 - ASME Code Section III

    • NCA-4000 - ASME Code Section III

    • NCA-9000 - ASME Code Section III

    • 10 CFR 21

    • ASME B31.1

    • ASME B31.3

    • ASME Code Section V

    • ANSI/NCSL Z540-1 1994 (R2002)

    • SNT-TC-1A 2006

    • ANSI/ASNT CP-189-2006

  • AS 9100-Appendix B