GG-T-321D
July 11, 1977
SUPERSEDING
Fed.
Spat.
GG-T-321C
September 28, 1962
FEDERAL SPECIFICATION
THERMOMETERS, SELF-INDI~TXNGc LIQUID-lN+~SS
FOR MACHINERY AND PIPING SYSTEMS
This specification was approved by the Ceineioner, ?ederal Supply
Service, General Servic@s Administration~
for the use of all Federal
agencies.
1.
SCOPE AND CLASSIFICATION
1.1 Scope.
This specification covers self-indicating, liquid-in-glass thermo-
meters for thoce applications and temperature ranges zpecified~ th- other applica-
tions within the limits
of range and accuracy specified herein.
1.2 Classification.
Thermometers shall be of the following types, classos~
ranges, styles, and
forms, as specified
(see 6.2).
1.2.1
and ranges.
Types, classes, and ranges shall be
● s
follows:
Type I
- Mercury.
class 1 - Bare bulb (union)t Range a -
Class 2 -
-40° to lloopo
Bare bulb (flanged), Range g -
200@ to 9S0° or 1,900”F.
Class 3 - Well (threaded and seal-welded
or seal-brazed).
Range a -
-40” to 11O”F.
Range b - 20° to 180”F.
Range c - 30° to 240”F.
Range d - SOO to 400”F.
Range e -
50° to 550*F.
Range f - 50° to 7S0° F.
Range g -
200° to 950° or 1,000”F.
1.2.2 Stem styles.
Styles shall be as followa~
Style
Style
Style
Style
Style
Style
Style
Style
Style
Style
Style
.
1-
2-
3-
4-
5-
6-
7-
8-
9-
10 -
11 -
Standard stem -
3-5/8 .
Short extension stem - 5-1/4.
Extension neck
- 5-114.
Extension stem,
extension
neck -
8-1/8.
Long extension stem
- 8-1/8.
Commercial standard
stem -
3-1]2 .
Commercial short
extension
neck -
3-1/2.
Commercial short extension stem - 6.
Commercial extension neck - 6.
Commercial extension stesa,
extension neck - 9.
Commercial long extension st~ - 9.
1.2.3 Forms (see figure 1).
Forms shall be as follows:
Form A -
Straight stem.
Fern 1) -
90” back angle stem.
Form C - 90°
rigl-,tside anqle.
Form D -
90° left sicleangle.
Fom E -
45” reclined angle.
Form
F -
Ad]ustablc angle.
FSC 6685
Downloaded from http://www.everyspec.com
