Emerson Rosemount 1199, Reference Manual

Page: 65 / 104

3.24.1 Parts required for installation
The parts required to install the UCP union connection seal will be defined here. Prior to
installation, you will need the following:
• Torque wrench
• Gasket (Emerson-supplied)
Cutting and welding equipment required if installing a new lower housing.
Verify the gasket material is appropriate for the application.
3.24.2 Installation steps
Follow these steps to install the UCP union connection seal:
Procedure
1. Using the appropriate size hole saw, cut a hole in the process vessel to accept the
lower housing. The diameter for a lower housing with a heat isolator groove is 2.37-
in. (60 mm). The hole should produce a tight, uniform fit when coupled with the
lower housing.
2. Bevel the edge of the vessel hole to accept filler material (see Figure 3-32 ). An angle
no larger than 37.5° is recommended; see ASME B16.25 for more details. Bevels can
be made on one or both sides of the tank. Do not grind or cut the bevel to a sharp
point. Attempt to leave a flat area. 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. Position the lower housing weld spud in the vessel hole, place heat sink and tack the
housing in place using the welding sequence shown in Figure 3-32 . Cool each
section with a wet cloth before proceeding to the next section.
CAUTION
Do not place the seal in the lower housing prior to welding. Do not nick the sealing
surfaces of the weld spud, the inner angled surfaces where the gasket sits shown,
weld spud where the gasket sits, shown in
Figure 3-32 , as any irregularities may
cause leaks.
4. Weld the housing in place using 0.030- to 0.045-in. (0,762 to 1,143 mm) stainless
steel rod as filler in the beveled area. Using between 100 and 125 A, adjust the
amperage for 0.080-in. (2,032 mm) penetration. Allow time to cool between weld
sections. Weld should be cooled to 350 °F (177 °C) or less after each pass while
being cool to the touch is preferred. Use of a damp cloth or compressed air is
allowed if rapid cooling is desired. Repeat procedure on the outside of the tank.
Note
The number of weld passes should be kept to a minimum while maintaining tank
weld standards and process requirements. Additional weld passes are a significant
Reference Manual Installation
00809-0100-4002 May 2020
Rosemount DP Level 65