Pagnotta Termomeccanica design and produces batch kilns and furnaces according to the standards of automotive and aerospace industry, applicable to heat treatment of steel and aluminium alloys:
- AMS 2750 rev .E (Aerospace Material Speciﬁcations) and its derivatives AMS 2770 di NADCAP – National Aerospace and Defense Contractors Accreditation Program
- CQI-9 (Heat Treat System Assessment) di AIAG – Automotive Industry Action Group
Heat treatment plants must guarantee the following:
- Temperature uniformity in the working space (TUS)
- Instrumentation (definition of the measuring and control equipment)
- Calibration of the measurement path (IT) between the controller and the thermocouple, including the measurement line
- System accuracy tests (SAT)
Documentation of test cycles:
Compliance with provisions and standards is essential to guarantee the level of quality which the components must meet, even if they are mass-produced. That is why it is necessary to carry out extensive and repeated tests, including testing of the instruments, and to draw up documentation.
Under the requirements of the AMS 2750 standard, the customer must also specify
- The furnace class (temperature uniformity class)
- The type of instrumentation (control instruments, means of recording and thermocouples used).
The more demanding the furnace class, the more accurate the instruments must be.
Furnaces manufacturing compatible up to Uniformity Class 1 (±3°C) and instrumentation type A.
The standard defines the intervals for testing of the instruments
System Accuracy Test (SAT) and furnace temperature uniformity test (TUS = Temperature Uniformity Survey).
The SAT/TUS tests must be carried out by the customer with measuring devices and sensors which operate independently from the furnace’s instruments.