flexible sprinkler connections

[Marshal Chris]

How do you go about measuring the minimum & maximum bend radius on the flexible sprinkler connections?

For example, the viking flexible head says minimum 3" radius bend measured to the inside surface of the bent hose. Where do you measure from?

 

[cda]

Call them and they will send you a neat tool that shows what the bend should be

If I remember there is no minimum bend

Just worded badly

Make sure they secure the bracket per manufacture

 

[cda]

here is the tool they send you you cannot make the bend any tighter but can be as straight as you want it View attachment 837Aldo make sure they have added in the extra friction loss they require

View attachment 404

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[Marshal Chris]

Thanks CDA. I appreciate it.

Now what's everyone opinion on these being installed on an exiting pipe schedule system. Would you require calcs? Why/why not?

 

[cda]

That is a definite

They have to be calculated differently then a standard head

Check page five::: column six

http://www.vikinggroupinc.com/usrelated/flexhead/FlexHead_Submittal_Package_09_2010.pdf

 

[cda]

Flexible sprinkler connection friction loss data is expressed in equivalent lengths of one-inch Schedule 40 pipe, and should be included in the hydraulic design calculations the same as a valve or fitting

http://www.pmengineer.com/Articles/Feature_Article/6d1b5647d7298010VgnVCM100000f932a8c0____

 

[Marshal Chris]

ty.

I said they needed to calc it but wanted to know where I can go to back it up. Only seemed logical.

 

[cda]

The tool has flexhead printed on it

If you are using a different brand they should have one also

http://www.flexhead.com/flexible-fire-system-supply-contact-us.asp

http://www.flexhead.com/pdf/Commercial-Sprinkler-Installation-Guide.pdf