Head Types
DOI 10.1615/hedhme.a.000415
4.2.4 Head types
E. A. D. Saunders
A. Introduction
The various exchanger types shown in Figure 414.5, Figure 414.7, Figure 414.8, Figure 414.9 and Figure 414.10 have bolted bobbin-type stationary heads, but this is not an essential requirement and other head types may be used depending on service conditions. In the case of fixed tubesheet exchangers, the head at the rear end need not match that at the stationary end.
The various head types and their applications are described below, the type letter relating to the particular designation system referred to in Section 413B. The first letter refers to the stationary end for all exchanger types and the second letter to the rear end of fixed tube-sheet exchangers only.
The channel-type head is commonly known as a "bobbin" in the United Kingdom and some other countries.
B. Bolted channel (type A or L)
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