Document BML2aRvBqrdX1vQDok1rwezo

. H. DETRICK COMPANY insulation division KTECHN/CAL DATA SHEET CLASS___ 14~ PAGE DETRICK PYROSCAT* For Fireproofing Structural Steel Detrick Pyroscat is a special formulation of high-temperature aggregates, asbestos fibers, hydraulic binder and other materials. These ingredients are factory-blended to a uniform dry mixture that is ready for application after mixing with water at the job site. Pyroscat is adapted to appli cation by spraying, casting and trowelling techniques, depending on job conditions. USES: Pyroscat provides a lightweight, fire-retardent protective treatment for structural steel columns, beams, tower skirts, LP gas tanks, and other exposed applications in refineries and chemical plants. Pyro scat sets up to a hard, durable sheath capable of withstanding for hours the 2000 F flame temperatures and high-pressure water streams commonly encountered in industrial fires. RECOMMENDED THICKNESSES: Fire-retardent1 materials are customarily rated in Hours, based on a given thickness used and on the method of application. For example, fire ratings for steel columns represent the number of hours required for heat from a "standard fire" to penetrate the protective treatment as applied, and to increase the steel column temperature to a critical level (1200 F). The thermal conductivity and heat capacity of a ma terial are of some importance in an ASTM Fire Test. But the ability of the complete treatment to withstand thermal shock without destruc tion is one of the most significant factors in determining practical fire ratings in industrial installations. r The Pyroscat thicknesses recommended below were determined by physical tests on a series of sprayed, cast and trowelled applications. Tests included direct exposure to 100 psi hose pressure, both before and after subjecting the Pyroscat treatment to severe flame conditions. Thickness of Pyroscat Approx. Fire Resistance Rating 1" 1-3/4" 2" ADVANTAGES OF DETRICK PYROSCAT: 2 Hours 3 Hours - (UL-R-3960) 4 Hours Safer While Fighting Fires...........Many concrete aggregates and com mon bricks used for fireproofing purposes will spall and shatter when they are heated and subjected to a hose stream. Pyroscat remains virtually unaffected after direct flame exposure and saturation with a 100 psi hose stream. Revised October 15, 1958 Replaces Class 13. 3 page 1 advantages of DETRICK PYROSCAT (CONTINUED): Lighter Weight. .... Pyroscat weighs less than 551bs./cu. ft. in place, compared to approximately 150 lbs./cu. ft. for conventional concrete fireproofing. Excess dead weight is eliminated. As usually sprayed or trowelled in a protective sheath, Pyroscat weighs about 1 /10 as much as formed concrete - at equivalent thickness per running foot. Easier to Apply. . . . .Detrick Pyroscat is specially formulated to per mit installation by spray, trowel and casting techniques, depending on local job conditions. No other fireproofing material is as versatile from an application standpoint. Employs conventional supporting ma terials and placement. Only the one fireproofing material is required - no need for subsequent finishing layers nor heavy mastic coatings. Durable and Weather-Resistant. .... Pyroscat develops great strength from its selected high-temperature aggregates and hydraulic-setting binders. It withstands continued cycles of saturated freeze-and-thaw weathering tests. SUMMARY OF: PHYSICAL PROPERTIES: Coverage (Trowelled).......................................................... 1.1 cu. ft. /50 lb. bag Material Required (Trowel Application)....................45 lbs. per cu. ft. Air-Cured Weight (After Hydration and Drying) . . 54. 5 lbs. per cu. ft. Compressive Strength - Air-Cured............................. 1650 psi Compressive Strength After Firing at 1500 F. . . . 520 psi Lineal Shrinkage - Air-Cured......................................... Less than 1% Lineal Shrinkage After Firing at 1500 F....................1.5% Density After Firing at 1500 F.......................................49. 1 lbs. per cu. ft. Fusion Temperature............................................................. 2200 F Thermal Conductivity (k) at 1000 F Mean Temp. . 1. 50 Btu Setting Time.......... .................................................................. 4 to 6 hours Mixing Water: For Spray& Trowel Consistency................. 3-1/2 gal. water/50 lb. bag For Casting Consistency.................................... 5 gal. water/50 lb. bag Curing: Pyroscat is a cementitious material and should be kept moist during the curing period of 72 hours or longer.