Original 1959 Oil and Gas trade vintage catalog for DOUBLE SEAL UNION COMPANY.  Main office and plant was located at 1212 Nance Street, Houston, TX.

Manufacturers of Double Seal Insulated Unions. Provides protection against stray currents in flow lines. Protection is simple and costs much less than hook-ups with insulated flange unions and only a few cents more than hook-ups with conventional unions. Insulation material lasts indefinitely. Will not absorb water or oil products. Will not dry out or become brittle. 

Has product images, illustrations, descriptions, applications and specifications provide extensive product details. Unbound from a large 1958-1959 Catalog of Oil Field Equipment, this unique old one-page technical specifications brochure would display beautifully matted and framed. Nice graphics. A fabulous addition to your retro petroleum industry library.