Engineers' Guide to Pressure Equipment - Index of

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3.2.10 Vessel supports
Engineers’ Guide to Pressure Equipment
i) Internally threaded coupling
ii) Weld neck flanged
iIi) Weld neck flange and pad
Fig. 3.10 General pipe-flange types
Horizontal pressure vessels (length L, diameter D mm) are commonly
mounted on two saddle supports. More than two supports would result in
static indeterminacy and cause difficulty in predicting the load distribution
in the event of foundation settlement. Supports generally extend at least 120
degrees around the vessel in order to transmit the reaction gradually into the
shell wall. One support is attached to the vessel to prevent axial movement.
The other is not attached but merely supports the vessel’s weight, thus
permitting free, longitudinal, thermal expansion.