“Transite” was Johns-Manville’s trademark for asbestos-cement pipe. Miles of smaller sizes [3-4 inch?] were made for telecomm duct. The recipe for the slurry to mold into finished pipe was kind of old and a bit secretive, like that of a sixth-generation winemaker.
There was a little old lady there that made raceway sweeps {long-radius bends} to order, and she would lay them out in one spot on the plant floor where they were least likely to be destroyed by rolling stock {forklifts.}
Another major US producer was CertainTeed.
[Aside — J-M was the first plant I worked that had 277V lighting. The plant electrical system was a phenomenally precise copy of Donald Beeman's 1955 Industrial Power Systems Handbook.]
[This message has been edited by Bjarney (edited 05-30-2004).]