![[ Visit Client Website ]](images/banner.gif)
Meeting AMS 2750D and Nadcap Certifications
Jim Grann and Craig Moller
IPSEN Inc. 984 Ipsen Road Cherry Valley, Illinois 61016
Abstract
The Aerospace industry utilizes thermal processing equipment for many processes including vacuum aluminum brazing. Thermal processing equipment and processes used for Aerospace purposes must comply with Aerospace Material Specification (AMS) 2750D and Nadcap certifications.
AMS 2750D focuses on pyrometry, while Nadcap is process related. Companies are often unaware of what compliance actually requires. For example, when a production facility needs 2750D compliance it often needs to fulfill AMS 2769A as well. In another example, while AMS 2750 D is understood to be pyrometry specific, the calibration of vacuum is an overlooked reference:
Section 3.5.12: Furnace Vacuum Level during TUS shall be run at the lowest vacuum level used in production, but need not be less than 1 micron Hg
What is the impact? According to several inspectors, if the processes utilize either Argon or Nitrogen gas in the form of Partial Pressure above 1 micron, the vacuum gauge must become part of the certification/calibration of systems.
Achieving compliance is simple when manufacturers understand the configuration of their vacuum equipment, document their processes, know the needed certifications and streamline processes for acceptance. “Lessons learned” are extremely valuable when it comes to achieving compliance to AMS 2750D and Nadcap certifications, and such experience will be highlighted in this paper.