CPSystemBD. Flange Isolation Kits, by GPT

GPT Flange Isolation Kits

GPT Flange isolation kits are available for all flange sizes, types, pressure ratings and materials. Each kit is individually and securely packed in a reinforced corrugated cardboard box, which is clearly labeled as to its contents for convenience in warehousing and field use. Very large diameter gaskets are packaged separately from the sleeves and washers for convenience in storing and handling.
Each gasket is labeled with:
Materials (Retainer Material or Retainer / Seal Element Combination)
Pipe Size
ANSI Class
Date of Manufacture
Type Flange (Weld Neck or Slip-on)

Sleeves and washers are enclosed in a strong polyethylene bag to eliminate any possibility of loss. A chart showing the recommended sequence for tightening flange bolts is also included with each kit, as well as with each individual gasket.

Common LineBacker^® & GasketSeal^® Sealing Gasket Physical Properties

ASTM Test	Property	Plain Phenolic	Neo-faced Phenolic	Hi-temp Phenolic G-3	Silicone Glass G-7*	Epoxy Glass G-10	Epoxy Glass G-11
D149	Dielectric strengths, Volts/mil	500	500	550	350-400	550	550
D695	Compressive strength, psi	25,000	25,000	50,000	40,000	50,000	50,000+
D229	Water absorption, %	1.6	1.6	0.7	0.07	0.10	0.10
D257	Insulating Resistance, Meg Ohms	40,000	40,000	46,000	2,500	200,000	200,000
D790	Flexural strength, psi	22,500	22,500	60,000	27,000	60,000	75,000+
D785	Hardness Rockwell "M"	85	85	115	105	115	115
D256	IZOD Impact, Strength ft-lbs/inch	1.2	1.2	12.0	8.0	14.0	12.0
D732	Shear strength, psi	10,000	10,000	18,000	20,000	22,000	22,000
D229	Operating temp, ºF	-65 to +220	-65 to +175	-65 to +392	Cryogenic to +450	Cryogenic to +280	Cryogenic to +350
D229	Operating temp, ºC	-54 to +104	-54 to +79	-54 to +200	-Cryogenic to +232	Cryogenic to +138	Cryogenic to +177

* = G-7 material should not be used with hydrocarbons, not even trace amounts.

Seal Element Temperature Limits

Nitrile	Viton	Teflon	Neoprene	EPDM
-65 to +250°F	-20 to +350°F	Cryogenic to +450°F	-40 to +175°F	-65 to +300°F
-54 to +121°C	-29 to +177°C	Cryogenic to +232°C	-40 to +79°C	-54 to +149°C

Consider both retainer and seal element temperature limits together
for GasketSeal^® and LineBacker^® Sealing Gaskets.