Expansion joints in steam pipelines are installed to

Question

Consider the following statements:

Expansion joints in steam pipelines are installed to                       

1. Allow for future expansion of plant.
2. Take stresses away from flanges and fittings.
3. Permit expansion of pipes due to temperature rise.

Which of these statements are correct?

a) 1,2 and 3                 b) 1 and 2

c) 2 and 3                    d) 1 and 3