Pipe shoes for stainless steel piping

[garfio]

I would like to have your opinion about the type of shoe that is more convenient/economic for stainless steel 304 hot pipe (2" to 12", up to 250°F, Sch 10S) with insulation. I have been presented with the following options:

a) SS "wear plate" plus CS shoe welded to wear plate
b) SS "T" shoe welded directly to pipe
c) CS bolted clamps (1 or 2) welded to CS shoe

Please share your experience and recommendations.

Thanks

 

[11echo]

Bolt on shoes would be the better choice. You could have them made in the shop and installed in the field by just labors, so a more economical operation start to finish. The other two options require "skilled/costly" people to implement. IMHO ...Good Luck!

 

[unclesyd]

We use a lot of these type shoes from Piping Technology based what we are trying to accomplish. Our design people, along with the insulators, especially like the pre insulated variety.
The majority of ours are used with CalSil.

http://www.pipingtech.com/products/preis/hot.htm

 

[C2it]

I agree with 11echo, use a clamp shoe unless you want a stop or guide to take a significant load, then use an st.stl wearplate and cs welded shoe.

When using clamps, make sure that they are compatible stainless, or carbon steel with an insulating liner.

 

[garfio]

Regarding the clamps that are suggesting:

Are they clamps directly clamped to the pipe (with insulation over the clamp) or (as some manufacturers show) they are clamped over the insulation?

If the clamps are CS and installed directly over the SS pipe: is it really required a liner between metals? The CS - SS contact also exists when using CS lap joint flanges with SS stubs and there is no liner there.

Thanks

 

[DSB123]

garfio,
As C2it says, if you are going to use CS clamped shoes directly to the SS pipe then you need an insulating layer. Sometimes a 3mm Tico strip is used. Contact a reputable pipe support manufacturer who will have a design to suit your needs.

 

[MJCronin]

Just a suggestion...

If you are going to use a "clamped shoe" design....

Either get a standard "load-rated" design from a reputable pipe suport vendor, or go out and test a few to destruction (not really expensive)

Divide the average destruction load by five....interpolate sizes where necessary

Allowable loads will vary with pipe materials, design pressures and clamp hardware ( U-bolts..?)

http://www.pipesupports.com/files/u2/PB_Pipe_Clamp_Base.pdf

My opinion only

-MJC