Pipes and tubular conduits – Distinct layers – With intermediate insulation layer
Patent
1978-10-12
1980-10-21
Bryant, III, James E.
Pipes and tubular conduits
Distinct layers
With intermediate insulation layer
138155, 138177, 432234, 264512, F27D 900, F27D 302
Patent
active
042288266
ABSTRACT:
A two-piece, interlocking laminated refractory for covering a waterpipe and method of manufacturing same having a low thermally conductive inner ceramic fiber layer, an outer ceramic fiber layer which is less thermally conductive than the inner layer and a metal mesh reinforcement secured to and disposed between the inner and outer layers. The refractory shape includes two main segments, each having a body segment, two protuberances spaced apart from the body segment by corresponding recesses and a void between the two protuberances. The two segments are fitted together such that the body segment and pair of protuberances of one segment are closely received and interlocked with the void and the pair of recesses on the opposing main segment. The inner and outer layers of the refractory are vacuum-formed by the use of a perforated vacuum mold submerged in a first and second ceramic fiber slurry.
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