Floating head, heat exchanger exchangers

Adequate space must be left around all equipment so that it can be easily serviced and operated. For instance, a floating head heat exchanger must have enough clear space so that the tube bundle can be removed from the shell and taken elsewhere for repairs. One company had problems with a heat exchanger during startup. They tried to remove the tube bundle, but found that they had not allowed adequate space and had to knock an opening in a brick wall. They replaced the wall with a door so that they would not need to remove any more walls when they needed to service it again. 

Floating-head heat exchangers with j-in. OD x 1-in. square pitch and 16-ft bundles construction. 

Figure 4.3 Floating-head heat-exchanger seal designs. From Ref.16 with permission. 

The values of and B2 for floating-head heat exchangers from Table A.4 are 1.63 and 1.66, respectively. The pressure factor is obtained from Equation A.3. 

Figure 15.16 Heat Transfer Correction Factor for Shell-and-Tube, Floating-Head Heat Exchangers... 

Suppose the cost for a fixed-head heat exchanger constructed of 316 stainless steel operating at 300-600 psi is to be estimated. The base case is a carbon steel, floating-head exchanger operating at 100 psi of area A. For such operation (Kuri and Corripio 1984), the base cost is... 

In a new process, it is necessary to heat 50,000 Ib/h of an organic liquid from 150 to 330°F. The liquid is at a pressure of 135 psia. A simple steam-heated shell-and-tube floating-head carbon steel exchanger is the preferred equipment choice. Steam is available at 150 psia (135psig) and 300 psia (285psig). The higher pressure steam should result in a smaller heat exchanger, but the steam will cost more. Which steam choice would be better ... 

Pumps reciprocating, motor driven, 25 psia head Heat exchangers floating-head, = 30°F, 1/ = 15 Btu/hr-ft -°F Reslurry vessel and crystallizer vertical, with HID = 2 AU equipment carbon steel... 

FIG. 11-36 Heat-exchanger-component nomenclature, (a) Internal-floating-head exchanger (with floating-head hacking device). Type AES. (h) Fixed-tiihe-sheet exchanger. Type BEM. (Standard of Tiihiilar Exchanger Manufacturers Association, 6th ed., 1978. )... 

When points for 20-ft-long tubes do not appear in Fig. 11-41, use 0.95 times the cost of the equivalent 16-ft-Iong exchanger. Length variation of steel heat exchangers affects costs by approximately 1 per square foot. Shell diameters for a given surface are approximately equal for U-tube and floating-head construc tion. 

I imire 9.63. Heat exchanger with floating head (two tube-pass, one shell-pass.)... 

A shell and tube heat exchanger, heat transfer area 50 m1 2 3, floating head type, carbon steel shell, stainless steel tubes, operating pressure 25 bar. 

The design type refers to variations in equipment configuration (e.g., fixed head versus floating head in a heat exchanger). The adjustment for material of construction is used principally to account for the use of alloy steel instead of carbon steel. The pressure rating factor allows adjusting costs for pressures other than the refer-... 

The steam superheater is a clamp ring-type, floating-head, shell and tube, heat exchanger. It is able to produce up to 5775 kg/h of steam at 380°C and 4000 kPa. 

A floating head-type shell-and-tube heat exchanger is recommended for this application because of the need to provide capacity for thermal expansion of the tube bundle. The floating head also enables easy withdrawal of the tube bundle for cleaning purposes. This factor may be very advantageous, not because the streams are subjected to fouling, but because of the possibility that platinum carryover from the reactor will be deposited on the walls of the tubes. Platinum recovery is improved by providing easy access. 

The need for a clamp-ring, internal floating-head, shell and tube-type heat exchanger for use as a steam superheater is determined. The... 

Heat exchanger, shell and tube, floating head, c.s. 100-400 ft2 0.60... 

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