TUBE
FITTINGS
Single
Ferrule
DesignTECHNICAL
LITERATURE
STANDARD
:
"
"
High Pressure Steel Fitting are
manufactured to DIN Standards
Specifications 2353 and I. S.
8801-1978. They are
manufacturered to suit MM OD {DIN
2391) Pipes as well inch OD and
N.B. Pipe Size (ASTM A 63-68 OR IS
1239: BS 1387 : 1967)
PRINCIPLE :
"
" Fittings with Ferrule is a three
piece design consisting of a body
portion, a coupling nut and a
ferrule. During the assembly of
the Fittings on a tube, the nut is
progressively tightened causing
the hardened ferrule to slide
along the inner Conical seat of
the body and grip the tube During
the further tighting, force
exerted make the ferrule's leading
edge bite into the tube throwing
up a visible collar
of displaced metal which acts as a
metalic interlock and makes the
joint leak proof at high pressure
and under vibrations.
On making the joint the ferrule is
altered in shape and its leading
edge bite the tube to the designed
depth. When the assembly
is disconnected, the ferrule
remains permanently fixed to the
tube end. This offers safety,
Simplicity and reliability which
can not be achieved with any other
design of Fitting.
MATERIAL
AND FINISH :
"
" Fitting, Nuts and ferrules are
available in carbon steel, S.S.
and brass. The C.S. fittings are
phosphated and oiled
for rust prevention and ferrules
are heat treated and Cadmium
plated.
PRESSURE :
The Pressure stated in the
catalogue are nominal pressure for
steel fitting with a safety factor
of atleast 4:1. These figures may
be
used as maximum working pressure
under normal working conditions
and temperatures upto 130° C. In
case of high temperatures
and instances where there are
surge pressure and high mechanical
stresses (Vibration etc.) we
recommend series "S".
General outlay of pressure
ranges, tube sizes and threads :
Series
O.D. of
tube
Normal bore
of tube MM
Working
pressure
Kg/CM2
Threads size at
ports/stud end Pipe
threads
L
6
5
250
1/8"
8
6
1/4"
10
8
1/4"
12
10
3/8"
15
12
1/2"
18
16
160
1/2"
22
20
3/4"
28
25
100
1"
35
32
1.1/4"
42
40
1.1/2"
Series
O.D. of
tube
Normal bore
of tube MM
Working
pressure
Kg/CM2
Threads size at
ports/stud end Pipe
threads
S
10
6
400
3/8"
12
8
3/8"
14
10
1/2"
16
12
1/2"
20
16
3/4"
25
20
250
1"
30
25
1.1/4"
38
32
1.1/2"
In general we recommend the use of
pipe coupling for pneumatic
systems, Hydraulic runback system,
Oil Heating, Vehicle Industries.
"S" Series are preferred for Ship
Building, Mining, Chemical
Industries, Pressure Piping etc.
FITTING
INSTRUCTION :
Cut the tube reasonably square and
to correct length, using a
hacksaw, The ends of
the tube should be filed square
and burrs removed.
Apply oil to the out side thread,
Conical seat of the fittings, nut
and ferrules.
Slip on the nut and the ferrule to
the prepared end of the tube with
the ferrules
taper matching to nut internal
chamfer.
Hold the steel fitting in a vice
holding the tube down with one
end, tighten the
nut down finger tight.
Holding the steel tube firmly
down, tighten the nut with a
wrench.
Using the wrench make one more
full turn of the nut, this will
drive the ferrule
forward to bite into the tubing
pushing up a
visible collar in front on the nut.
This completes the joint. It
doesn't matter if ferrule can be
rotated on tube end.
