1.1 This specification covers seamless and welded titaniumand titanium alloy tubing on which at least part of the externalorinternal surface has been enhanced by cold forming forimproved heattransfer.Thetubesare used insurface condensers, evaporators, heat exchangers, coils, and similarheat transfer apparatus in diameters up to and including 1 in.[25.4 mm]. The base tube wall thickness is typically at least0.049 in. [1.245mm] average, but lighter gauge may benegotiated with the manufacturer.
