ADVANTAGES AND DISADVANTAGES OF WELDED JOINTS
The
following are the advantages of welded joints.
• Due
to the absence of gusset plates and other connecters, the welds are usually
lighter.
• Welding
process is quicker as it requires no drilling of holes.
•
Welding is more adaptable than other
types of connections and can even be used in circular
pipes.
•
100% efficiency can be achieved in welding where
as the connection such as bolts can have a maximum efficiency of 70 - 80%.
Noise
produced during the welding process is relatively less.
• Welds
usually have
good aesthetic appearance.
• Welded
joints are air tight and water tight and can be used for water tanks and gas
tanks.
• Welded
joints are rigid.
• Mismatch
of holes will never happen in welded connection.
• Alternation
of joints can easily be made in the case of welded connecetions.
However
the welded connection is having the following disadvantages.
•
Due to the uneven heating and cooling,
members are likely to distort in the process of welding.
• Possibility
of brittle fracture is more in the case of welded connections.
• Welded
connections are more prone to failure due to fatigue stresses.
• The
inspection of welded joints is difficult and expensive. It can only be done by
employing
NDT.
• Highly
skilled persons are required for welding.
• Proper
welding in field conditions is difficult.
• Welded
joints are over rigid.
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