423--Design Example: Floating-Head Heat Exchanger, TEMA Type AJS

doi:10.1615/hedhme.a.000423

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Design Example: Floating-Head Heat Exchanger, TEMA Type AJS It's an article

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A B C D E F G H I J K L M N O P Q R S

constructional features, design codes for, example of calculations,

Design Example: Floating-Head Heat Exchanger, TEMA Type AJS It's an article

supports,

multipass, numerical solutions for: with flow pattern calculation, pressure drop in headers, nozzles, and turnarounds in, safety of specifications, thermal design, tube failure in, twisted tube type,

T U V W X Y Z

S Shell-and-tube heat exchanger: mechanical design: basic principles, example of calculations,

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Design Example: Floating-Head Heat Exchanger, TEMA Type AJS

DOI 10.1615/hedhme.a.000423

4.3 SHELL-AND-TUBE DESIGN CODES
4.3.6 Design examples: Floating-head and fixed tubesheet exchangers

M.Morris (1992) and D.Harris (1982)

A. Introduction

The mechanical design in this section is for a floating-head shell-and-tube exchanger (TEMA type AJS). For comparison, the fixed tubesheet design of a TEMA type AEL exchanger is carried out in Section 423H. They conform to the Standards of Tubular Exchanger Manufacturers Association (7th ed., 1988) and the ASME Boiler and Pressure Vessel Code (Section VIII, Division 1, 1989). The calculations are in SI units.

(a) Specifications

TEMA class	R

Design pressure shell side	2,000 kPa
Design pressure tube side	500 kPa
Design temperature shell side	100 °C
Design temperature tube side	150 °C
Corrosion allowance shell side	3 mm
Corrosion allowance tube side	3 mm
Shell inside diameter	635 mm
Channel inside diameter	635 mm
Shell inlet nozzle nominal pipe size	203 mm
Shell outlet nozzles (2 off) nominal pipe	152 mm
Mean shell metal temperature	100 °C
Mean tube metal temperature	120 °C
Tube-side inlet nozzle nominal pipe size	305 mm
Tube-side outlet nozzle nominal pipe size	305 mm
Number of tubes	468
Tube outside diameter	19.05 mm
Tube wall thickness (14 BWG)	2.11 mm
Tube length	4,060 mm
Tube pitch	23.812 mm
Tube pattern (as defined by TEMA R-2.4)	30°
Number of tube passes	4
Number of baffles-segmental	9
Baffle spacing	380 mm
Baffle cut	25%
Impingement protection	None
Weld examination	Spot

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