Evening star., 1960-12-01
OFFICIAL NOTICES

Afucte b-Amenu Artlcle 70
sissss Hssrs 5 sos 1sllss' THE e. Nsfglfk NNsfGlEEkE:
STEAM HEATfNc. BoiEESM BoihEiE1SSS.
iO The return water connection
TO every low pressure steam
heating boiler shall be ar
ranged to form what Is known
as the Hartford Loop" so that
of the % boiler SiS selSS he e iSee safe wstsr Ter
level, This connection shall be
Installed on each boiler, as shown
In. Appendix I with the inside bot
tom Of the return pipe close
nipple where. 1t enters the eanaliz-
ing loop at the same level as the
top OF the lower water Gage glass
nut. tbl Each boiler shall have
between the bottom, opening Of the
boiler and the boiler stop valve,
when used. When q stop valve
Is used In the return line Of the
loop it shall be located within
8 feet of the door. A drain valve
shall be provided at the lowest
point Of the return line. CAL
vanized pipe and fittings shall not
ss s.r ussS , N 2, Any Ispa part Il The sSHa
plbe shall not have q valve in It
at any point and shall not be used
as Q means to connect two or
more boilers together below the
water line. EQualizer pipe sizes
;ns shah ..S.s,,,s. not Se less than the fellow
Crate Area ss.v.RC. sise Pipe
So Ft. Lbs. Per Hr. Inches
Under 4 $50 or less Ia
TO is 2SI TO 1000 2h
'Note: Safety Valve Relieving Ca
pecity for :. this purpose shall be
the capacity as stamped on .
steel boiler Or on ne name plate
boiler shall be I provided with ! 1 eity
water feed line which shall not
discharge directly into any part
Of 2 boiler exposed to the direct
radiant heat from the drea, ltl
shall be connected into the equal
king line between the boiler and
the eondensate return connection
and shall have q check valve In
the line as close e the boiler, as
shall be adequate to take care Of
the maximum demand Of the
boiler. All connections from the
city water shut-oh valve shall be
Of non-ferrous pipe with screwed
ntttnes; tubing shah not be used
I'D a condensate return pump
shan have capacity TO- supply the
boiler or boilers with sufhcient
water 70 maintain . normal water
level when the boilers are operat-
ing ct maximum capacity, When
more than one boiler Is Installed
the condepsate return, line shall
be aIranged to supply all boilers
equally. te} A stop valve shall be
installed in each supply and re-
turn connection Of two or more
boilers connected to . common
used in the supply pipe eonnec.
tion OF 8 single boiler. there shall
be one used in the return pipe
there are multiple branch con.
neetions each one shall be Waived.
When stop valves. over 2 inches
IN size are used they shall be Of
the outside-serew-and-yoke type
stop valves shall be located asI
when over q feet above the Moor
shall be made accessible for op-
eratton by means Of . permanent
steel ladder and platform or By q
chain or motor operated mech
anism: 0J Every boiler shall have
one or more blow-od connections
fltted with straightway valves con-
neeted directly with the lowest
water water SPACE. Plug or bibb cocks
pipe shall Be % run to the s'"a moor
full size with an ell at the bottom
70 direct the water away from the
operator or TO a blow-off tank. A
Tee, fitting shall be used at the
boiler in order to provide for
cleaning the line. Blow-oid valves
shall Dot be smaller than the fol-
LOWING schedule:
Boiler Rating Pipe size
sdSs5: Tsd.I rsss i'SdS dES;D'R. Inches
l.00i 70 $500
3.50l to $500 IN
S,501 and over
II o surfSes blow down Il used,
y shalk be run fun size to the
moor with an ell at the bottom or
70 . eommon drain. tel All wash
out and hand hole OPENINGS .shali
1e aeeesstble and shall not be OBJ
stlueted or blocked By pipe OrI
other obstacle Capped pipe nip
pies and not plugs shall be IN
stalled z yash-out epeninss. (h)
tion below the water line for any
boilers. tl6) Section ~, Article
fellow: s0i sS5iLtK SbNT1SSois
IseS. - k,ysiTIy y.iIy sn teen soiIef; = when
vided With 9 atea4 limit control
sDsss,s sPss:,,srs = Tesulsscr, nl.s. Which shall
allowable working pressure Of the
of nozi ferrous pipe with screwed
fttinRs and there shan not bel
any valve between the boiler and
the control. When two or more
boilers are connected to q common
header. o.. master limit control
header shall be provided to con-
troll all boilers simultaneously. (b)
Every steam boiler. when mechan-
ically fired. shall be equipped with
an approved lov-water fuel cut
on, so located as 10 automatically
cut on the. fuel supply In case
the water level falls TO Q level
not, not lower than The top Of the
SEsssm Ssss except eHs h.. 'nf hi. .ss
apply TO miniature boilers used
for the operation Of pressing ma
chimes. The operation Of the low
water fuel cut-ofi. shall not bel
dependent upon the fnnetioningl
Of another device; When an oil
burner is manually operated, the
cgt-od, valve shall be located in
the OIL line close to the burner
No No valves shall Be permit permitted Be-:
tween the Low water-fuel cut on
boiler shall have one or more
water-sage glasses attached to the
water Column or directly to the
boiler Sy means Of Waived fittinss:
with q drain valve OF the straight
than " inch diameter. The gage
glass shall be visible from the OPP
Grating floor and without the re-
moval Of any cover or casing. There
shall be no obstruction TO interfere
with visibility Of the gage glass.
ldl when gase cocks or Rage glass
shut oh. cocks are located rs
fioor, they snail iDGss Ss sas q ths IDe'a aaicE
opening type with chains or rods
attached for operation from the
floor. The sage glass and pressure
gage shall be Illuminated BY Q
light with an approved type Of
reflector so that they can be easily
read. te) An automatic water
ies os t.d d'issG .tsm oR Ssns saSs
boiler. II shall have sufiicient
capacity to take care Of the
maximum boiler output, A boiler
feed pump when used, shall have
capacity to supply sufficient water
90 all boilers to maintain q normal
water level when the boiler or
boilers are operating at maximum
pass, with the valves accessible
from the floor. shall be installed
around q feeder and shall have q
Waived drain run to within g inches
OF the noor. A water feeder shall
be installed so that II will not
maintain the water level above
the normal operating level as
tie boiler, u On oisa ioW.pressuTs S
steam heating boilers the water
gage glass shall be located so
that the lowest permissible water
level In the glass shall be: (D For
multipasS nre-tube boilers: At least
inch of water over the top
row Of tubes or the fusible plug,
L used. whichever is higher: 60
boilers: At least "a inch Of water
over the top row Of tubes or the
fusibIe plug. II used. whichever is
the, higher. t3I For fire-box.
horizontal water tube boilers: At
least one inch OF water over the
highest point Of the crown sheet.
az For any other type boiler: In
accordance. with manufacturers'
recommendations. ts) Two or
more boilers shall be arranged so
that the low water line OF ali
boilers. is at the same level. ex-
eept that when each, boiler is
provided with an individual pump
control and an automatically
operated feed water control valve
they may be approved for opera
tion with different water levels,
(h) Every boiler shall have q
pressure gage connected TO itS
steam space. or to Its water
column. or To itR atAam cnnnac.l