Understanding Heat Exchanger Reading 02

Alternate Tongue and Groove Joint
1. Section 2 is not intended to prohibit
un-machined tubesheet face and flat
cover faces, therefore no plus
tolerances id shown on R4.
2. Negative tolerances shall not be
constructed to mean that final
dimension can be less than that
required by design calculations.
3. For peripheral gaskets, “confined”
means “confined on the OD”.
4. Details are typical and do not
preclude the use of other details
which are functionally equivalent.
5. For units over 60” (1524) to 100”
(2540) diameter, tolerances “D” and
“W” may be increase to ± 1/16” (1.6)
Charlie Chong/ Fion Zhang