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Heavy Embedded Ball Valve

Heavy Embedded Ball Valve

Heavy Embedded Ball Valve

(OP)
Hi everybody,
In one project which I am dealing with, there is 56" natural gas header that it is going to branch a 42" line from it (all of them U/G). My question is: "Is it safe to put that heavy 42" ball valve just on the soil, or it is required that a foundation being prepared to bear its weight.

RE: Heavy Embedded Ball Valve

I'd think you'd want to consider a foundation slab. In some cases soil is strong enough, but even piles may be needed in very poor soils.

Design the area of the slab such that the resulting load is similar to the load on the soil from the pipeline + product alone.

Independent events are seldomly independent.

RE: Heavy Embedded Ball Valve

What you also find is that most supports now support the pipe either side of the valve not the valve itself which can flex the valve too much. If you just rest on the soil, you often find the stress analysis doesn't like to very much as you have this large wieght held up by the pipe and suffering large bending stresses as a result.

My motto: Learn something new every day

Also: There's usually a good reason why everyone does it that way

RE: Heavy Embedded Ball Valve

A valve that large should be ordered with integral supports welded to the body, especially made for distributing its weight to a directly-under-the-valve foundation slab, or footing, without imparting undue twisting or bending moments on the valve itself.

I would be very hesitant trying to support such a large valve from supports placed on either side of it.

Independent events are seldomly independent.

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