Fulton Vertical Electric (FT-N) Thermal Fluid (hot oil) Heater - Manual (Page 34)

Fulton Thermal Corp.*Electric Thermal Fluid Heaters Manual* Version 2010-0423
Page 34
where the piping is first soaked in an acid bath, then soaked in a neutralizing bath, then
given a protective oil coating.)
d) All pipes should be installed with a pitch to facilitate draining and venting.
Note
Inspect the system daily for leaking joints. Shut the system down and tighten any
leaking flanges or connects immediately.
17. System Connections
a) If screwed connections have to be made, e.g. to items of control equipment, then a
thread sealant suitable for use with fluids at elevated temperature must be used. Teflon
tape, standard pipe dope, or hemp and paste are not acceptable. Screw threads must be
carefully and accurately cut. If possible, new tools should be used. Threaded connections
larger than 1” are not to be used. It is recommended that GR5 or better tensile steel bolts
be used for all flanged joints.
Standard gaskets supplied by Fulton for operating temperatures above 650 o F are
Flexitallic Spiral Wound.
Recommended Loads for Flexitallic Spiral Wound Class 150# Gaskets
SAE Grade 5 Bolts (typical) or Equal
Nominal Flange Size
Inches Number of Bolts
Diameter of Bolts
Inches
Preferred Torque
Required per Bolt
Ft-Lbs.
1/2 4 1/2 45
3/4 4 1/2 45
1 4 1/2 45
1 ¼ 4 1/2 45
1 ½ 4 1/2 45
2 4 5/8 90
2 ½ 4 5/8 90
3 4 5/8 90
3 ½ 8 5/8 90
4 8 5/8 90
5 8 3/4 150
6 8 3/4 150
8 8 3/4 150
10 12 7/8 240