(5) Heat or FireDamage.
Cylinderswithsigns of heatorfiredamage areconsidered to have sufficientdamage and mustbe
condemned. Heat or firedamage may be evident by discoloration,charring,or burningof the
composite, labels, or paint. If,however, the protectivecoating is onlysoiled fromsmoke or other
debris, and is found by examinationto be intactunderneath,the cylindersmay be returnedto
(1) Onlyrepairsto the fiberglass overwrappingthe manufacturer'slabel can be made. To repairthe
fiberglass,trimthe loose and frayedfiberglassusing a sharp knifeorrazorblade. Do NOTpullthe
fiberglass. Repairsshould be made using a commercial,roomtemperaturecure,two-component
epoxy resinsystem. The resinmustdryCLEAR,so thatthe manufacturer'slabelis dearlyvisible.
The epoxy resin should completelycover the label/damaged area and extend approximately1/4
inchonto the paintedsurface of the flask. Flawsites mustbe observed forliftingor peelingof the
fiberglass overwrap. Itsuch liffingor peeling occurs aftera repairof the composite flask, the
cylindershould be returnedto the manufacturerfora determinationof serviceability.
Repairsto the Kevlaroverwrapcan be made ONLYby the cylindermanufacturer.
(2) Afterrepairingand testing the composite flask,replace the composite flask (Para.4-20b 2-5).