24" Valve Anchoring? 1

[khu]

I'm working on a site project with our state DOT. On the project, there is a pond supplying water to the fire suppression systems in the buildings. There is a 24" transfer line between a pump building and the fire pond. In that line there is a 24" gate valve. The DOT designer included the State's standard detail which shows for valves over 12", a 4" concrete bearing pad is required.

Would there be any need to anchor that valve to the pad? The detail shows no anchoring, just the valve sitting on the pad.

 

[LittleInch]

Shouldn't be - just park the valve on the slab. The less anchors the better.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[khu]

Shouldn't be - just park the valve on the slab. The less anchors the better.

I figured this, but wasn't sure. I've never seen valves anchored, but the Contractor was asking for an anchoring detail for the valve to the slab.

 

[bimr]

The answer depends on how the piping will be installed.

If you are using piping materials with non-restrained joints, including with gaskets, it is necessary to provide anchors for the valve, to prevent pull-out of the joints.

If the piping has mechanical joints, they you will not need anchors for the valve.

 

[khu]

The answer depends on how the piping is installed.

It's all butt-fused HDPE.

 

[bimr]

If the piping is buried then a valve anchor is not necessary. If the piping is installed on the ground surface, then you need valve anchors.

 

[itsmoked]

Seismic issue?
In CA we need seismic rated electrical enclosures for something that weighs 1/100th what that valve weighs.

Keith Cress
kcress -

http://www.flaminsystems.com

 

[1503-44]

Big valves have lots of inertia.
It's not the weight. More the resulting velocity.

A black swan to a turkey is a white swan to the butcher ... and to Boeing.