Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

  • Congratulations LittleInch on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Double Longitudinal Seam in duct section

Status
Not open for further replies.

Lummers1

Bioengineer
Joined
Mar 24, 2010
Messages
1
Location
IE
We have installed two pieces of SMACNA class 1 round galvanised duct 900 diameter with double longitudinal seams in each section. Please confirm if this is acceptable practice according to SMACNA and if so where I can prove this.
 
If you are saying 900mm then it is an alternate method of making a long piece of duct. Stock sheets are 4x8 5x10 and 6x12 feet
so your shop would have to use two 5x 10 sheets to get you a 10 foot section. your alternative would be spiral wrap, or shorter duct sections.
B.E.

The good engineer does not need to memorize every formula; he just needs to know where he can find them when he needs them. Old professor
 
The accepted method is one seam on either side of the duct 180* apart not two seams 6" or 9" apart.
B.E.

The good engineer does not need to memorize every formula; he just needs to know where he can find them when he needs them. Old professor
 
Status
Not open for further replies.

Part and Inventory Search

Sponsor

Back
Top