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TECHNICAL DATA SHEET
INTERNAL CLAMP WITH COPPER SHOES
Product: PWT-ICA
Pg. 1/6
INTERNAL CLAMP WITH COPPER SHOES
PWT-ICA
TECHNICAL DATA SHEET
INTERNAL CLAMP WITH COPPER SHOES
Product: PWT-ICA
Pg. 2/6
The P.W.T. pneumatic Internal Line-up Clamp, is a clamping mechanism designed to exert a radial force
sufficient to line-up and hold in position, two joints of pipe during the welding of the root or stringer bead.
The unit is essentially two independent force mechanisms actuated by two double acting air cylinders. The air
cylinder moves in a lineal manner to actuate the mechanism to give a radial force against the inside of the
pipe.
The radial force is transmitted to the inside wall of the pipe by means of a series of plungers. The force
mechanism are mounted in a tubular frame having support wheels for longitudinal travel of the clamp. The
standard clamp is designed to be manually pulled from joint to joint by a pull rod. However, powered clamps
are available on special order. An air reservoir is also mounted in the tubular framework.
Function of main components:
The main components of the pneumatic line-up clamp are listed below.
a) Double Acting Air Cylinders
There are two double acting air cylinders used to actuate the force mechanism. The rear air cylinder actuates
the rear force mechanism or rear chuck. The front air cylinder actuates the front force mechanism or front
chuck.
b) Rear Chuck
The rear chuck is the rear force mechanism having a series of plungers for clamping the inside of the pipe. The
rear chuck is expanded after the clamp is positioned in the pipe and prior to bringing the net joint of pipe into
position.
c) Front Chuck
The front chuck is the front force mechanism having a series of plungers for clamping the inside of the pipe.
This front chuck is expanded after the incoming joint of pipe is positioned and spaced to the spacers
satisfaction.
TECHNICAL DATA SHEET
INTERNAL CLAMP WITH COPPER SHOES
Product: PWT-ICA
Pg. 3/6
d) Support Wheels
Four wheels mounted on the bottom side of the tubular frame provide a means to roll the clamp along the
pipe. The two rear wheels are adjustable in the vertical plane ad are used to centre the rear of the clamp in
the pipe. The two front wheels are adjustable in both the horizontal and vertical planes. This double
adjustment permits proper positioning of the front of the clamp. A spring loaded tail wheel maintains balance
of the clamp.
e) Air Reservoir
The air reservoir is a 400 PSI tested reservoir used to store air for actuating the cylinders.
f) Air Valves
Two pilot blow-off four way air valves are used to control the air cylinder. Four air blender valves are used to
remotely control the pilot blow-off valves
g) Air Filter and Lubricator
An air filter and lubricator is mounted in the tubular frame work. On the small clamps, the air filter and
lubricator is located just in from of the air reservoir. On the large clamp, they are located in the nose section.
General Features:
Equipment name: PWT-IC (Diameter range) – Internal Clamp.
Pipe Wall Thickness from 16”: 5-25mm (on request for other thickness)
Pipe Material steel grade: Manual Welding or Automatic Welding from outside with back
support.
Type of Expansion: After the calibration all the piston internal clamp guarantee to
describe a perfect circle.
Speed of Expansion: (Quickly coupler) Snap System.
Feeding Pressure: 10 Bar.
Max. Pressure: 15 Bar.
Minimun flow at feeding pressure 1.000 Litres/min.
Pipe Slope: 5° (On request for other slope)
Leakage in operation: Leak proof during the coupling time.
Manual Control: Yes.
Mechanic remote control: 14 Meters.
High level safety side brake system:
Make activity by manual and remote control and activated when the
traveling motor stop, and release automatically when the travelling
motor start.
Sound Proof: According to Euro regulation.
TECHNICAL DATA SHEET
INTERNAL CLAMP WITH COPPER SHOES
Product: PWT-ICA
Pg. 4/6
Table of specific characteristic:
Model: O.D.
Range
Dimension:
(mm)
Weight:
(Kg)
Motor:
Speed:
(mt/sec)
N° of Expander: Strength of each piston
(15Bar):
ICA-8 8” 8”x1750 95 NO * -- 4 900
ICA-10 10” 10”x2300 135 NO * -- 6 750
ICA-12 12” 12”x 2200 170 NO* -- 6 1050
ICA-14 14” 14”x2200 175 NO * -- 6 1050
ICA-16.18 16”-18” 16”x2800 285 YES 1.40 8 1300
ICA-20.22 20”-22” 20”x3000 460 YES 1.40 8 1050
ICA-24 24” 24”x3000 550 YES 1.40 10 1600
ICA-26.28 26”-28” 26”x3800 570 YES 1.20 12 1400
ICA-30.32 30”-32” 30”x3800 710 YES 1.20 16 1600
ICA-34.36 34”-36” 34”x3800 940 YES 1.20 20 1600
ICA-38 38” 38”x4300 1210 YES 1.20 24 1600
ICA-40.42 40”-42” 40”x4300 1580 YES 0.55 24 1750
ICA-44 44” 44”x4300 1650 YES 0.55 24 1750
ICA-46.48 46”-48” 46”x4300 1800 YES 0.55 24 1750
ICA-50.52 50”-52” 50”x4300 2200 YES 0.55 24 1750
ICA-54.56 54”-56” 54”x4300 2350 YES 0.55 24 1750
ICA-58-60 58”-60” 58”x4300 2350 YES 0.55 24 1750
* on request.
TECHNICAL DATA SHEET
INTERNAL CLAMP WITH COPPER SHOES
Product: PWT-ICA
Pg. 5/6
Optional Equipments:
Manual Welding System
The Manual welding system is made up of rings each one provide with a
set of expander pistons for the centering and the alignment of pipes to
be weld.
The manual welding system can be installed on various internal clamps
construction types as pneumatic, electropneumatic, double joint, main
line and coating cement.
Optional Equipments:
ELECTRO PNEUMATIC
The Pneumatic Clamp is used for a correct centering and alignment of
pipes.
For the translation, the machine can be provided with axial piston air
motors, air vane motors or electric motors.
Its operational cycle is carried out with electrovalves by a remote
control connected to the machine with an ombelican cable.
TECHNICAL DATA SHEET
INTERNAL CLAMP WITH COPPER SHOES
Product: PWT-ICA
Pg. 6/6
Optional Equipments:
PURGING SYSTEM
For the execution of special welding, tight seals and a chamber for the
inert gas pressurization are assembled on the clamp.
According to the use, the frame of the clamp can be totally realized in
stainless steel or can be covered with steel only the parts of frame in
contact with pipe.
They can be provided with or without copper backing shoes.
LOAD CELL
The clamp can be provided with a tension load cell and with an
appropriate control display to check the critical tension of the buckle
detector.
BACK FITTINGS
Electric and air back fittings are assembled only on electro-pneumatic
clamps to carry out welding in parking garage for double joint automatic
or manual welding.