heat exchanger tube plugging

[mehdipoor]

hi friends.i'm searching about plug sizing for heat exchanger tubes.can anyone give me a useful table for plug dimension calculation included :d,D,L ?

[viswanathankasi2]

i too needed it pl. upload

[AAQE]

Well there is no hard and fast rule for the design of tubes plug. Being a maintenance engineer i know few things about it;
1. Length of Plug length is usually 38mm.
2. Taper in plug is 5 degree.
3. Minor Dia of plug is less than ID of tube.
4. Plug material is same as of Tube material.
5. In case of -----s during welding of plug with tubesheeet, a hole is drilled on plug's major dia side at its centre to cater expansion effect. Such type of plugs are known as Johnsons Plug.

[Nasir]

Dear AAQE

Very thanks for your usefull information.
I shall like to add in point (5) that Johnson plugs are also used where the operating temperature differences are huge in tube & shell side. It is to give the plug required elasticity against thermal stresses.

Best regards,

[AAQE]

Thanx Nasir for adding such a conducive information.

[viswanathankasi2]

nice stuff keep on giving these kind of data's so that v can gain knowlegde.