Pressure vessel sight glasses

Details Pressure vessel sight glasses Pressure vessel sight glasses

1987-01-20

1989-10-31

Swisher, Nancy A. B.

Stock material or miscellaneous articles

Sheet including cover or casing

428 75, 428 76, 73323, B32B 104, B32B 302

Patent

active

048776688

ABSTRACT:
A pressure vessel sight glass, especially a tempered glass, is protected against the corrosive attack of normally alkaline, boiler feed water heated up to 300.degree. C., by providing the sight glass with a metallic oxide coating consisting essentially of SnO.sub.2, optionally combined with Cr.sub.2 O.sub.3. The coating is preferably applied as a sprayed solution of soluble salt convertible to the oxide.

REFERENCES:
patent: 3925575 (1975-12-01), Church et al.
patent: 3963798 (1976-06-01), Miller
patent: 4671110 (1987-06-01), de Kock

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