001 Front Cover

Manufacturing, Engineering and Sales Since lgi|

il: s a les@a s ric h a rds. com

Phone: 6l 7-527-4385

Fax: 6 I 7-g 64-3 746

E- M a

Ceramic Protection Tubes- Silicon Carbide and Hexaloy@

Silicon Carbide. Carbon Bonded [lsopressedf Carbon bonded silicon carbide tubes (SCl) are less porous (8%) than Nitride bonded silicon carbide but not as dense as Oxide or 8.7% Silica, 2.1% Sodium Oxide, 1 .43% Aluminum Oxide, .44o/olron Oxide. Note: Protection tubes are coated with a silicon carbide glaze to reduce open porosity and reac- tive surface area of the protection tube. This glaze is used to help prolong the service life of the tube. Nitride bonded tubes. They have a maximum service temperature of 2800"F (1S50"C). Composition - 78.2.O/o Silicon Carbide (Black, coarse grained Alpha / Beta mix), 1

Reverse Bushing cemented on the tube.

SCRB.* SCNRB.*

2" Male NPT 2" Male NPT

1 314 1 314

44.5 44.5

25.4 25.4

1

1

Reverse Bushlng

Cemented coupling.

P

sccP1l2-* sccP114-* sccNP112-* sccNP114-*

\

1

1 314 1 314 1 314 1 314

44.5 44.5 44.5 44.5

1 112" FNPT 1 114" FNPT 1 112" FNPT 1 114" FNPT

25.4 25.4 25.4 25.4

1

1

1

CoupIIng

Steel Mounting Flange attached to a tube with a collar.

SCFL-*

1 314

44.5 25.4

1

. Add length (P) as the suffix, multiples of 6 inches (152.4mm) are stocked.

Silicon Carbide. Hexaloy@ SA Hexaloy@ Silicon Carbide has a maximum service temperature of 3000"F (1650"C) in both oxidizing and corrosive atmospheres. It can be used in chemicals including strong acids and bases. Hexaloy@ is chemically inert and has excellent thermal shock resist- ance ten times superior to Alumina. lt is very hard, second only to diamonds, with excellent wear and abrasion resistance. Hexaloy@ has five times the thermal conductivity of Alumina. Unlike other forms of silicon carbide, Hexaloy@ can be used as a single primary protection tube since it is gas tight. Composition - 99% Sintered fined grained green Alpha-Silicon Carbide.

Lengths 6" to 26"

scHX0604-* scHX1006-*

Various fittings can be mounted on the end of the tube. See page 97

Lengths 6" to 48"

scHX1208-* scHX1608-* scHX2012-*

. Add length (P) as the suffix, multiples of 6 inches (152.4mm) are stocked.

Hexaloy@ is a trademark of Carborundum Co.

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