Insulation Set

Flange insulating sets are packaged for one flanged joint, including gasket, sleeves and washers. Each flange set is securely packaged in a cardboard box, clearly labeled as to size, ASA Rating, style and material.


Recommended Installation
Type E or SE gasket minimizes possibility of foreign material making electrical contact between flanges. The above illustration is a properly installed Type E or SE gasket flange insulation set with single and double washers. Gasket I.D. should be same or smaller than I.D. of flange. Washers should be installed on unprotected side of flange yielding complete protection for studs or bolts in buried flanges. Alignment pins recommended when possible and should be a minimum of 3/32" (2.381mm) larger than bolt size. Make sure to test flanges after each installation. Replace any broken or cracked sleeves or washers, as they will eventually result in an electrical short of the complete insulation.


The physical (or chemical) properties of HMS Gasket Materials represent typical, average values obtained in accordance with accepted test methods and are subject to normal manufacturing variations. The indicated minimum values are as shown. This information is supplied as a technical service and is subject to change without notice. Check the HMS office to assure current information.