Asbestos Containing Material (ACM) Image Page #2

Block Insulation on Pipe Saddles/Supports:

Asbestos block insulation was often used to support and insulate pipes at the hanger (a.k.a., saddles). The adjacent fittings may or may not be ACM; in other words, please do not assume the hanger insulation is asbestos-free simply because the adjacent fitting is asbestos-free. Most of this block insulation is high-percentage asbestos and will becove friable if disturbed. Also, this material may not be uniformly applied throughout the building or applied on all utilities.

From our experience, this material was installed well in to the late 1970s. Replacement (asbestos-free) block often looks identical to the asbestos block. Please be sure to consider the saddle insulation as well as fitting insulation before you plan any repair/demolition work on TSI.

Example of pipe hanger (saddle) insulation. The hanger insulation on the right is unwrapped and exposed; the hanger on the left is properly encapsulated. In this particular building, the adjacent fitting (elbow insulation) is asbestos-free insulation and straight-run insulation is fiberglass. Pipe hanger insulation
Pipe hanger block insulation Unlike the above example, this saddle only had block insulation applied to the bottom half, the top half was fiberglass. Like the above example, the adjacent fittings on this particular utility were asbestos-free. Sample #10307K40 was 25% chrysotile and 20% amosite. In most cases, the saddles are well protected and encapsulated by the paper, cloth or sheet metal covering. Pipe hanger block insulation
In this particular building (right photo), some pipe saddles have asbestos block insulation and others do not. All systems here were installed at the same time. In this application, the saddles lacking the block insulation have a metal pipe support and fiberglass insulation.

Also, the adjacent mudded fittings on both lines are asbestos-free insulation. In summary: check all saddles for asbestos block insulation as well as the mudded fittings before disturbance of pipe thermal system insulation.

Various saddle insulation applications

Fire-Stop Material and Penetration Packing:

Pictured is asbestos fire-stop material packed into wall penetrations. In most instances, this material will become friable if disturbed. Request a bulk sample analysis before disturbance of this material.
Fire-stop in wall penetration

Spray-on Insulation and Fire Proofing:

The example below is spray-on fire proofing material applied to structural steel. Most spray-on is highly friable. This paricular application is asbestos-free material (Sample #00829K17, applied 1987). With few exceptions, most ACM spray-on at UWM was removed in the mid-1980s. In most cases, asbestos-free spray-on material was reapplied. The replacement insulation looks the same as the asbestos variety. Click on the thumbnail for a larger image.
Example of deck and structural steel spray-on insulation. This particular insulation is asbestos-free. Click on the thumbnail for a larger image.
Two other examples of spray-on and structural steel insulation; both these examples were negative for asbestos. Click on the thumbnail for a larger image.
Example of spray-on insulation applied to ventilation ductwork for kitchen deep fryers. Sample #70812K12 was amosite asbestos (less than 50% amosite, applied 1970).
Go to Asbestos Containing Material (ACM) Image Page -- Miscellaneous Materials

Return to
Asbestos Management Program Home Page

Updated August 15, 2007