Dished or conical bottoms

Vertical tanks. Those supported above ground are made with dished or conical bottoms. Flat bottomed tanks rest on firm foundations of oiled sand or concrete. Supported flat bottoms usually are 1/4 in. thick. Roof plates are 3/16 in. thick. Special roof... 

Dished or Conical Bottoms "Supports must be so located as to support the vessel and its extra weight uniformly and completely without distortion of the vessel. Thus ... 

Emulsifiers and blenders Mixer-emulsifiers are sometimes used as an alternative to slow-speed impeller mixing or high-pressure homogenization for a wide range of processing requirements. These mixers are normally used in dished or conical-bottom vessels. 

In such service, the bed of adsorbent is commonly called a filter. It may be installed in a vertical cylindrical vessel fitted with a dished or conical bottom, of diameter ranging up to as much as 4.5 m and height up to 10 m. In the case of decolorizing clays, the beds may contain as much as 50 000 kg of adsorbent. The granular adsorbent is supported on a screen or blanket, in turn supported by a perforated plate. 

Design Tip. Dished heads (ASME dished, elliptical, or torispherical heads) are the preferred design. To achieve complete suspensions, flat-bottomed heads require 10 to 20% higher impeller speeds than for dished heads (Mak, 1992). Conical bottoms must be avoided. 

A.1.1.1 The Tank or Vessel The most common version of the tank or vessel is a vertical cylindrical tank with a dish end at the bottom. In exceptional cases (mostly old designs), the bottom may be conical. In this latter case, there is always the danger of inadequate mixing in the conical part. If a solid phase is an integral part of the... 

---