Calcium Silicate Insulation is a molded, high temperature, abuse-resistant pipe and block insulation with exceptional structural strength, composed of hydrous calcium silicate for use on systems operating up to 1200°F (650°C). It meets or exceeds the physical property requirements of ASTM C 533, Type I&GB/T10699-1998. Because of its strength, low thermal conductivity and durability, it is the preferred product for application on high temperature piping and equipment. It is especially recommended for use in the petrochemical and power generation industries where pipe and equipment operate up to 1200°F (650°C).
Normal Pipe Sizes Block Insulation Thickness
in. mm in. mm
½-12 23-327 1 25
½-20 23-511 1½-2 40-51
22-48 562-1230 2-2½ 51-65
½-56 23-1420 2½-3 65-76
*½ (13mm)increments
Pipe Insulation is 24” (600mm) in length, and is available in thick nesses from 1” to 3” (25 mm to 75mm) in ½”(13 mm) increments. Thick wall material is furnished in double layers. Block Insulation is 24” (600mm) wide and12” (300mm) in length, and is available in thick nesses from1” to 4” (25 mm to 102 mm) in½ “ (13 mm) increments.
ASTM C 533, Type I
Density (Dry) Average 13.75 lbs. per cu. ft.
ASTM C 302 220 kg/m3
Flexural Strength 50 psi (344 kPa)
ASTM C 203
Compressive Strength 100 psi (690 kPa)
ASTM C 165 to Produce 5% Compression
Abrasion Resistance After First 10 Min. - 15
(% Weight Loss by Tumbling) After Second 10 Min. - 30
ASTM C 421
Linear Shrinkage Less Than 2 .0% After 24-hr.
ASTM C 356 Soaking Period at 1200°F (650°C)
Max. Service Temperature 1200°F (650°C)
ASTM C 411
Surface Burning Characteristics Flame Spread - 0
ASTM E 84 Smoke Developed – 0
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