Download the PDF file
This Document/database has combined and reduced the
number of environmental categories to three, which are defined below.
The protected environment is
applicable for parts employed according to the following provisions:
a. used in readily
accessible maintenance applications
b. used in a controlled
environment
c.
with a temperature range of 0°C
to 70°C
d. not used in an application with shock,
vibration, pressure or moisture
e. not stored for later
usage
f. with an application life-span of up to 5
years
The normal environment is
applicable for parts employed according to the following provisions:
a. used in inhabited
applications
b. used in applications usually accessible for
maintenance or replacement
c. used
in an uncontrolled, but not extreme, temperature environment with a temperature
range of -40°C
to +85°C
d. used in an application having a minimal to
low-medium controlled shock, vibration, pressure or moisture
environment
e. can be stored for later usage (not to exceed
10 years)
f. with an application life span of 5 to 10
years
The severe environment is
applicable for parts employed according to the following provisions:
a. used in uninhabited
environments
b. used at varying temperatures or temperature
extremes
c. with a
temperature range of -55°C
to 125°C
d. used in an application having a medium to
high shock, pressure, vibration, or moisture
environment
e. can be stored for later usage (over 10
years)
f. with an application life span of 10 to 20
years