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Witnessing Programs

Welcome to API's Witnessing Programs

API's Certification Programs offer Witnessing Programs in the following areas:

  • Recommended Practice 19B - Registration of Well Perforator Designs
  • MPMS Testing Protocols

Through our one-of-its-kind Witnessing Program, API provides knowledgeable and experienced witnesses to observe critical industry tests and verifications. The results are reported by the witness and may be posted on our website for potential customers to review. The API Witnessing Program brings objectivity and reliability to evaluating and reporting important test results.

For additional information, please contact our Audits Team at


API Spec 19B Perforator Witnessing Program


MPMS Chapter 22.2 - DP Flow Meter Witnessing Program