Hartford Steam Boiler Inspection and Insurance Company · Hartford, Ct. : Hartford Steam Boiler Inspection and Insurance Co · leaf 31
ding size of ordinary pipe, in order that the same dies can beused in threading it ; and its extra thickness is added on the inside, in such a way as todiminish its actual discharge area. A 6-inch extra heavy pipe is therefore a pipe thathas the same external diameter as an ordinary weight pipe…
Locomotives · Steam-boiler explosions
Internet Archive · Carnegie Library of Pittsburgh · Public Domain Mark 1.0. Free to use for anything.
