C. J. Dandrow's Draft Bulletin to District Managers on a High Temperature Insulation Fabrication Shop (1955)

A three-page draft bulletin of April 15, 1955, to all J-M district managers, with handwritten edits, from C. J. Dandrow of the Industrial Contract Department, on a shop for fabricating fitting covers of magnesia, Thermobestos and Superex insulation for valves, tees and bent pipe. A full-scale shop of the recommended design had been built at the Manville Research Center, and J-M offered its design to all its Technical Service Units at an estimated cost of about $4,500, borne by the units. The equipment list includes a bandsaw, a dust collection system with ductwork, and "Sufficient dust respirators (Dust Foe No. 55 or equal)" and face shields "as required for shop personnel."

In Johns-Manville's chronology

Johns-Manville's own chronology of what the company knew describes this document as follows:

Draft Bulletin to all District Managers, dated 4/15/55, entitled "High Temperature Insulation Fabrication Shop," from C.G. Dandrow of J-M. Refers to fabrication of magnesia, Thermobestos and Superex. Bulletin provides information to enable each J-M Technical Service Unit to outfit a fabrication shop at a cost of $4,500 (plus space). $2,000 of cost will be paid by J-M, and the remainder by the unit. The latter category includes a small "dust collection system" duct work, and "sufficient dust respirators (Dust Foe No. 55 or equal) and face shields (American Optical or equal) as required for shop personnel."

Editor's note: J-M's description says J-M would pay $2,000 of the cost. The draft says all costs were to be borne by the Technical Service Units, with some items supplied by J-M at its cost. The writer's initials on the copy are C. J., not C. G.