Flange Guard are special products to protect the Hydro carbon fluid pipe lines/valves external fire and to protect the manpower to escape from a possible fire area to a safe location by containing the temperature of the pipeline/ valves/ studs for about an hour.
Flange Guard/Bund Sleeve Crystal make flange guard are used mainly to protect the sandwich type check valve
from external fire. Crystal flange guard are flame tested for and external fire temperature of 1050oC with results of the
protected valve temperature not exceeding 120oC after 45 minutes of exposure to fire. This would protect the long studs of the
check valve from thermal exposure and thereby eliminating the possibilities of Hydro-carbon that leak through the valves at least
for 45 minutes, Crystal Flange Guards (Heat Guards) can be easily removed and re-fixed to attend any possible maintenance
Crystal manufactures their flange guard/ heat guard in variable size from 1 NB” to as big as 42 NB" size. Non-standard requirement can also be designed and supplied for special requirement. Few thousands of bund sleeves are in operation for few years now in India’s major refineries and petrochemical installations