Sleeved flexible metal piping, method of manufacturing same and

Details Sleeved flexible metal piping, method of manufacturing same and Sleeved flexible metal piping, method of manufacturing same and

1994-06-06

1996-02-27

Nicholson, Eric K.

Pipe joints or couplings

With casing, lining or protector

Lined

285156, 285149, 285382, 138122, 138154, 454 44, 454 47, 29505, F16L 9147, F16L 1316

Patent

active

054943191

ABSTRACT:
Insulated flexible metal piping is provided which includes a metal piping section having inner and outer windings comprising metal bands which are spiral-wound in overlying relation with their leading and trailing edges forming a spiral, interlocked seam. The flexible metal piping section is slidably inserted in an insulating sleeve, which can comprise a plastic material for enclosing the metal piping section. A method of forming the insulated metal piping is disclosed which includes the steps of providing inner and outer spiral windings; interlocking the leading and trailing edges thereof; and slidably inserting a flexible metal piping section formed thereby in an insulating sleeve. Further disclosed is an application of the insulated metal piping in a flue system.

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