Emerson Rosemount 1199, Reference Manual, Page: 53 / 104

Figure 3-21: Bevel Example
A
B
C
A. Tank spud
B. Bevel
C. Tank
The flat area should be large enough to minimize spud distortion but small enough so that
tank weld requirements can be met. Minimizing the bevel angle will decrease the amount
of fill required during weld and minimize the number of weld passes. These best practices
will decrease heat input and help mitigate distortion.
3.16.4 Welding
CAUTION
Excessive heat will distort the tank spud. Allow adequate cooling time between passes.
Ensure spud is not assembled to transmitter and/or remote seal prior to welding. Do not
nick the sealing surfaces of the tank spud, the inner angled surfaces where the O-ring sits
shown in
Figure 3-22 , as any irregularities may cause leaks.
Figure 3-22: O-ring Sealing Surfaces
A
A. Sealing surfaces
With the spud centered in the tank hole, make sure the inner surface of the spud is flush
with the inner surface of the tank. The leak detection hole in the spud should be at the
bottom of the spud. With the spud properly located, tack weld it into place using four tack
welds, 90° from each other.
Begin welding on the inside of vessel. Weld in sections similar to the sequence in Figure
3-23 .
Reference Manual Installation
00809-0100-4002 May 2020
Rosemount DP Level 53