insullation

George_35

Happy New Year!
could someone tell me is this insulation correct to use. thank you.see attached pics.

Matt_67

from your pics

from your pics i can not tell if that is the fiberglass insulation that i prefer to use (it appears a bit thin) is ti fiberglass or some other material? as a note though it appears that mallable fittings were used as opposed to the heavier steam (cast)fittings that should be used for steam. i"m assuming that this is a steam system. if so the fittings also need to be insulated if they are mallable. happy new year and good luck.

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George_35

yes it is fiberglass for 2"pipe

Brad White_184

Moulded Fiberglass

is the standard for steam piping. Use not less than 1-inch thickness although energy codes tend to require 1.5-inch thickness up to 1.5-inch pipe size and 2-inch thick insulation for 2-inch pipe size and up to 4-inch pipe size, IIRC.

Do the mains of course but spend time on the fittings, using covers and inserts or mouldable insulation cement on the fittings.

Knauf, Certain-Teed and J-M are a few names to check out.

George_35

so i need to remove this?

Brad White_184

You can go over it

using "nested" sized insulation. For example, your 2" pipe with 1/2" insulation may measure the same OD as 3" pipe. Thus 3 x 1" or 3 x 1-1/2" thick insulation would be the likely choice, for example, and will give you a 1.5 to 2-inch covering thickness.

Insulating over the fittings may also be simplified by using the thinner insulation between the fitting bosses.

I would invest in a Pocket Rocket (see the On-Line Store) or careful caliper measurement of the insulated OD.

George_35

thank you for the advice. What about the foil tape at the edges? should i remove.

Brad White_184

No harm

in leaving the tape, especially if it is what is holding on your first layer. This is not a vapor barrier issue such as in a cooling system, if that was your concern.