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This is a 3 ft preformed fiberglass tube for insulating 3 1/2 in pipe, slit lengthwise with an adhesive flap so it closes around existing lines without cutting into the run. It carries an R-value of 8.7 at 2 in wall thickness, a plenum rating and an ASJ white jacket, and it handles 0 °F to 850 °F. That temperature ceiling is far above foam or elastomeric sleeves, which top out well below boiling, so it suits steam, hot water and process lines where rubber insulation would fail. The trade-off is fiberglass: rigid, itchy to handle, and it needs gloves, sleeves and a mask. Buyers rate it highly, and the main complaints are fit and jacket adhesion rather than thermal performance.
In stock
In stock
In stockSold by SIM Supply Inc
Availability unknownSold by zorotools (99.9% positive, 1,400,000 ratings)Returns: Set by the eBay seller; the eBay Money Back Guarantee covers an item that doesn't arrive or isn't as described.
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Lowest price we've seen: $18.11 on Nov 9 at Grainger Industrial Supply. Tracked across 3 stores since Nov 9.
Buyers give it high marks, and the recurring praise is that it does the thermal job on hot lines and installs quickly because it is pre-slit. Complaints center on the flap adhesive and on sizing at the pipe.
This is a 3 ft section of fiberglass pipe insulation in a rigid tube form. It has a white ASJ facing and covers straight runs of pipe or tubing. It is preformed and factory cut to length, which saves fabrication time in the field.
The tube is slit along its length and closes around the pipe with an adhesive flap. It operates from 0 °F to 850 °F. It is plenum rated for air-filled spaces and has a flame spread index of 25 and a smoke developed index of 50.
