What is Caulking & Fullering and description.

1. COMASATS Institute Of Information Technology
Sahiwal
Department Of Mechanical Engineering
Assignment No. 2
Topic: what is caulking and fullering and their purpose.
Submitted To
Mr Asad Javed Bhutta
Submitted By
Raza Farooq
Sp14_BME_001
Subject
Machine Design
Submission Date
14_11_2016

2. Caulking
In order to make the joints leaks proof or fluid tight in pressure vessels like steam
boiler, air receives and tanks etc. A process known as caulking is employed. In this
process narrow blunt tool called caulking tool , about 5 mm thick and 38 mm in
breadth is used. The edge of the tool is ground to an angle of 80 degree. The tool
is moved after each blow along the edge of the plate , which is planed to a bevel
of 75 to 80 degree, to facilitate the forcing down of edge. It is seen that the tool
burrs down the plate at A in fig. 9.12(a) forming bthe metal in metal joints. The
head of the rivets as shown at C are also turned down with a caulking tool to
make a joint steam tight. A great care is taken to prevent injury to the plate below
the tool.
Fig.9.12(a)
Fullering
A more satisfactory way of making the joints staunch is known as fullering which
has largely superseded caulking. In this process a fulleeing tool with a thickness at
the end equal to the plate is used in such a way that the greatest pressure due to
the blow occur near the joint , giving a clean finish , with less risk of damaging the
plate.

3. Caulking Application
Caulking is both the processes and materials (are also called sealant) to seal joints
or seams in various structures and some type of piping. The oldest form of
caulking is used to make the seams in Wooden Boats or ships water tight , by
driving fibrous material into the wedge-shaped seams between boards . A related
process was formerly employed to join the sections of cast iron sewerage pipe.
The same term also refers to the application of flexible sealing compounds to
close up gaps in buildings and other structures against water , air , dust insects
etc.
In the tunneling industry , caulking refers to the sealing of joints in segmental
precast concrete tunnels, commonly by using concrete.
Difference b/w Caulking and Fullering
Caulking
1. It is used to obtain leak proof joints.
2. The operation is carried out by using narrow blunt tool called caulking tool.
3. The thickness of the tool is about 5mm.
4. Surface finish obtained is less compared to fulleeing.
5. More risk of damaging the plates.

4. Fullering
1.It is used to obtain more leak proof joints compared to Caulking.
2. It is carried out by using fullering tool.
3. The thickness of the tool is equal to the thickness of the plate.
4. It is gives clean surface finish.
5. Less risk of damaging the plate.