Fulton Ancillary Equipment SteamPac Unfired Steam Generators - Manual (Page 27)

Fulton Thermal Corp.*SteamPac Unfired Steam Generators Manual* Version 2010-0201
Page 27
18. Bolting Sequence for 4 and 8 Bolt Flanges
a) High point bleeds are to be installed at all high points in the system piping. 1/2” x 12”
nipples welded in the top of the piping with ball valves & plugs attached are to be
used.
b) It will save a considerable amount of time during the cold filtration if the thermal
system piping is cleaned prior to assembly.
c) The mill scale (the results of oxidation) on the inside of the piping as well as
construction debris can foul the oil and cause the need for the filters to be cleaned
more than need be. This can range from simply using a rag to ordering pickled pipe.
(“Pickling” is a process 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.
19. 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.
b) 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.
20. Valves
a) Manual control and isolating valves should be the flanged or weld type, manufactured
from cast or forged steel or ductile iron, with internals and gland seals made from
materials suitable for use with high temperature fluids.