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Atmospheric tank design

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Polytechnic School

Engineering Internship Report 4

Lists of tables

TABLE 1:MINIMUM THICKNESS FOR SHELL PLATE [1] ............................................................................................. 14

TABLE 2:MINIMUM THICKNESS FOR ANNULAR BOTTOM PLATES [1] ....................................................................... 18

TABLE 3: PERMISSIBLE PLATE MATERIAL & ALLOWABLE STRESSES [1] ................................................................ 33

TABLE 4: THICKNESSES OF SHELL MANHOLE COVER PLATE AND BOLTING FLANGE [1] ........................................... 34

TABLE 5: DIMENSIONS OF SHELL MANHOLE NECK THICKNESS [1] ........................................................................... 34

TABLE 6: DIMENSIONS OF BOLT CIRCLE DIAMETERS DB AND COVER PLATE DIAMETER DC FOR SHELL MANHOLES

[1] .................................................................................................................................................................... 35

TABLE 7: DIMENSIONS FOR SHELL NOZZLES [1] ....................................................................................................... 35

TABLE 8: DIMENSIONS OF SHELL NOZZLES [1].......................................................................................................... 36

TABLE 9: DIMENSIONS OF SHELL NOZZLES FLANGES [1] .......................................................................................... 37

TABLE 10: DIMENSION OF FLUSH-TYPE CLEANOUT FITTINGS [1]............................................................................. 37

TABLE 11: DIMENSION OF FLUSH-TYPE CLEANOUT FITTINGS [1] ............................................................................. 38

TABLE 12: DIMENSION OF FLUSH-TYPE SHELL CONNECTIONS [1] ............................................................................ 38

Tunisia Polytechnic School

Engineering Internship Report 5

Lists of figures

FIGURE 1 : TYPICAL ATMOSPHERIC TANK COMPONENTS [6]....................................................................................... 8

FIGURE 2: ABOVEGROUND ATMOSPHERIC TANKS [6] ................................................................................................. 8

FIGURE 3: AN ABOVEGROUND STORAGE TANK [1] ................................................................................................... 11

FIGURE 4: DESIGN PROCEDURE FLOW CHART ........................................................................................................... 13

FIGURE 5: SHELL MANHOLE [1]................................................................................................................................. 20

FIGURE 6: ROOF MANHOLE [1] .................................................................................................................................. 21

FIGURE 7: API 650 REGULAR NOZZLES [1] ............................................................................................................... 21

FIGURE 8: API 650 THREADED NOZZLES [1] ............................................................................................................. 21

FIGURE 9: FLUSH TYPE CLEANOUT FITTINGS [1]....................................................................................................... 22

FIGURE 10: FLUSH TYPE SHELL CONNECTION [1]...................................................................................................... 22

FIGURE 11: EFFECTIVE MASSE [1]............................................................................................................................. 25

FIGURE 12: CENTROIDS FOR SEISMIC FORCES [1] ..................................................................................................... 40

FIGURE 13: FACTOR K [1] .......................................................................................................................................... 40

FIGURE 14: COMPRESSIVE FORCE B........................................................................................................................... 41

Tunisia Polytechnic School

Engineering Internship Report 6

Introduction

Since its creation, Tunisia Polytechnic School has provided its students with

diversified internships and an open view over the market world. This policy aims to provide

future engineers with a know-how and a capacity to occupy key positions on the job market. It

is within this scope that I followed my engineering internship at Industrial Engineering

Technologies (IET) during one month.

The subject of this internship, which I carried out at the engineering department, was the

development of an excel data sheet for the design of an atmospheric tank. In fact, atmospheric

tanks are of a great importance in many industrial applications since they allow us to store a

big variety of liquids such as chemical substances, oil, etc. Nevertheless, the use of these

tanks can be of a great hazard (explosions, liquid spills and different tank shape failures).

Therefore, a good design of such tanks is required and many attempts were carried out in this

context. American Petroleum Institute 650 (API 650) is one of the primary industry standards,

by means of which, most aboveground welded storage tanks are designed and constructed.

The internship objective was to determine the dimensions of the different components of a

welded

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