Chapter 1: Introduction 1-1
What is PVElite?...................................................................................................................................... 1-2
What is the Purpose and Scope of PVElite? ............................................................................................. 1-2
What Distinguishes PVElite from our competitors?................................................................................. 1-3
What Applications are Available? ............................................................................................................ 1-4
Chapter 1: Introduction
1-2 PVElite User Guide 2005
What is PVElite?
PVElite is a PC-based pressure vessel design and analysis software program developed, marketed and sold
by COADE Engineering Software. PVElite is a package of nineteen applications for the design and analysis
of pressure vessels and heat exchangers, and fitness for service assessments. The purpose of the program
is to provide the mechanical engineer with easy to use, technically sound, well documented reports with
detailed calculations and supporting comments, which will speed and simplify the task of vessel design,
re-rating or fitness for service. The popularity of PVElite is a reflection of COADE's expertise in
programming and engineering, as well as COADE's dedication to service and quality.
What is the Purpose and Scope of PVElite?
Calculations in PVElite are based on the latest editions of national codes such as the ASME Boiler and
Pressure Vessel Code, or industry standards such as the Zick analysis method for horizontal drums.
PVElite offers exceptional ease of use, which results in dramatic improvement in efficiency for both design
and re-rating.
PVElite features include:
Introduction 1-3
_ Graphical User Interface, which lists model data and control with a vessel display.
_ Both horizontal and vertical vessels may be composed of cylinders, conical sections, body flanges as
well as elliptical, torispherical, hemispherical, conical and flat heads.
_ Saddle supports for horizontal vessels. Leg and skirt supports at any location for vertical vessels.
_ Extensive on-line help.
_ Deadweight calculation from vessel details such as nozzles, lugs, rings, trays, insulation, packing and
lining.
_ Wall thickness calculations for internal and external pressure in accordance with the rules of ASME
Section VIII Divisions 1 and Division 2, PD 5500 and EN-13445. Stiffener rings are evaluated for
external pressure.
_ Wind and seismic data using the American Society of Civil Engineers (ASCE) standard, the Uniform
Building Code (UBC), and the National (Canadian) Building Code, India Standards as well as British,
Mexican, Australian and European Standards.
_ User defined unit system.
_ A complete examination of the vessel's structural loads combining the effects of pressure, deadweight
and live loads in the empty, operating and hydrotest conditions.
_ Logic to automatically increase wall thickness to satisfy requirements for pressure and structural loads
and introduce stiffener rings to address external pressure rules.
_ Structural load evaluation in terms of both tensile and compressive stress ratios (to the allowable
limits).
_ Detailed analysis of nozzles, flanges, and base rings.
_ A complete material library for all three design standards.
_ A component library containing pipe diameter and wall thickness, ANSI B16.5 flange pressure vs.
temperature charts, and section properties for AISC, British, Indian, Japanese, Korean, Australian and
South African structural shapes.
_ Printed output from PVElite is exceptionally clear and complete, with user definable headings on each
page. User comments and additions may be inserted at any point in the output.
What Distinguishes PVElite from our
competitors?
COADE treats PVElite more as a service than a product. Our staff of experienced pressure vessel engineers
are involved in day-to-day software development, program support and training. This approach has
produced a program, which most closely fits today's requirements of the pressure vessel industry. Data
entry is simple and straightforward through annotated input screens and/or spreadsheets. PVElite provides
the widest range of modeling and analysis capabilities without becoming too complicated for simple
system analysis. Users may tailor their PVElite installation through default setting and customized
databases. Comprehensive input graphics confirms the model construction before the analysis is made.
The program's interactive output processor presents results on the monitor for quick review or sends
complete reports to a file, printer or Word document. PVElite is an up-to-date package that not only utilizes
standard analysis guidelines but also provides the latest recognized opinions for these analyses.
1-4 PVElite User Guide 2005
PVElite is a field-proven engineering analysis program. It is a widely recognized product with a large
customer base and an excellent support and development record. COADE is a strong and stable company
where service is a major commitment.
What Applications are Available?
The following applications are available in PVElite.
General Vessels
Wall thickness design and analysis of any vessel for realistic combinations of pressure, deadweight,
nozzle, wind and seismic loads in accordance with ASME Section VIII Division 1 rules, Division 2 rules,
PD 5500, and EN-13445. These calculations address minimum wall thickness for pressure and allowable
longitudinal stress (both tension and compression) in the vessel wall for the expected structural load
combinations.
Complete Vertical Vessels
Vessels supported by either skirts, legs or lugs can be defined for complete dead load and live load
analysis. Stacked vessels with liquid are also addressed. Hydrotest conditions may be specified for either
vertical or horizontal test positions. Vessel MAWP includes hydrostatic head and ANSI B16.5 flange
pressure limitations.
Complete Horizontal Vessels
Stress analysis of horizontal drums on saddle supports using the method of L. P. Zick. Results include
stresses at the saddles, the midpoint of the vessel, and in the heads.
The following applications are available in PVElite:
Shells & Heads
Internal and external pressure design of vessels and exchangers using the ASME Code, Section VIII,
Division 1 rules. Components include cylinders, conical sections, elliptical heads, torispherical heads, flat
heads, spherical shells and heads. This program calculates required thickness and maximum allowable
internal pressure for the given component. It also calculates the minimum design metal temperature per
UCS-66, and evaluates stiffening rings for external pressure design.
This module also includes the implementation of API-579 for Fitness For Service evaluations (FFS). Sec.
4, Local Thinning, Sec. 5, General Metal loss and Sec. 6 Pitting Corrosion, are available at this time.
Introduction 1-5
Nozzles
Required wall thickness and reinforcement under internal pressure for nozzles in shells and heads, using
the ASME Code, Section VIII, Division 1 rules and including tables of outside diameter and wall
thickness for all nominal pipe diameters and schedules. The program checks the weld sizes, calculates the
strength of reinforcement and evaluates failure paths for the nozzle. Hillside, tangential and Y-angle
nozzles can also be evaluated.
Conical Sections
Internal and external pressure analysis of conical sections and stiffening rings using the ASME Code,
Section VIII, Division 1 rules. Complete area of reinforcement and moment of inertia calculations for the
cone under both internal and external pressure are included.
Floating Head
Internal and external pressure analysis of bolted dished heads (floating heads) using the ASME Code,
Section VIII, Division 1, Appendix 1 rules. An Additional calculation technique allowed by the Code
(Soehrens calculation) is also implemented by the program.
Flanges
Stress analysis and geometry selection for all types of flanges using the ASME Code, Section VIII,
Division 1 rules. This program both designs and analyzes the following types of flanges:
_ All integral flange types
_ Slip on flanges and all loose flange types with hubs
_ Ring type flanges and all loose flange types without hubs
_ Blind flanges, both circular and non-circular
_ TEMA channel covers
_ Reverse geometry weld neck flanges
_ Flat faced flanges with full face gaskets
Users can input the external forces and moments acting on the flange and alternate mating flange loads.
Tubesheets (TEMA and PD 5500)
PVElite performs an analysis of all types of tubesheets using the 8th Edition of the Standards of the
Tubular Exchanger Manufacturers Association and PD 5500. The program takes full account of the effects
of tubesheets extended as flanges, and for fixed tubesheets also includes the effects of differential thermal
expansion and the presence of an expansion joint. Expansion joint can be designed within this module. For
a fixed tubesheet exchanger the program can analyze multiple loads cases for both the corroded and
uncorroded conditions. If an expansion joint is added, then corresponding expansion joint load cases will
also be run.
1-6 PVElite User Guide 2005
Horizontal Vessels
Stress analysis of horizontal drums on saddle supports using the L.P. Zick method. Results include
stresses at the saddles, the midpoint of the vessel and in the heads. Stiffening rings used in the design of
the vessel are also evaluated. Wind and seismic loadings are also considered. Additionally, the saddle,
webs and baseplate are checked for external seismic and wind loads. Users can also specify friction and
additional longitudinal forces on the vessel.
Legs & Lugs
Analysis of vessel support legs, support lugs, trunnions and lifting lugs based on industry standard
calculation techniques, and the resulting stresses are compared to the AISC Handbook of Steel
Construction or the ASME Code. A full table of 929 AISC beams, channels and angles is included in the
program. Users can also perform WRC 107 calculation on the trunnion and the support lug, from within
this module.
Pipes & Pads
Required wall thickness and maximum allowable working pressure for two pipes, and branch
reinforcement requirements for the same two pipes considered as a branch and a header. Based on ANSI
B31.3 rules, this program includes tables of outside diameter and wall thickness for all nominal pipe
diameters and schedules.
WRC 107/FEA
Stresses in cylindrical or spherical shells due to loading on an attachment, using the method of P.P.
Bijlaard as defined in Welding Research Council Bulletin 107, including a stress comparison to VIII Div.
2 allowables for 3 different loading conditions. This module also contains an interface to the Finite
Analysis Program (Nozzle Pro from The Paulin Research Group).
Baserings
Calculates stress and thickness evaluation for skirts and baserings. Results from both the neutral axis shift
and simplified method for basering required thickness is reported. Required skirt thickness due to weight
loads and bending moments are also displayed. Tailing Lugs attached to the basering can also be
analyzed.
Thin Joints
Stress and life cycle evaluation for thin walled expansion joints in accordance with ASME VIII Div. 1
appendix 26.
Thick Joints
Stress, life cycle and spring rate calculations for flanged and flued expansion joints in accordance with
ASME VIII Div. 1 appendix 5. The spring rate computation is per TEMA eighth edition.
Introduction 1-7
ASME Tubesheets
This program determines required thickness of tubesheets for fixed or U-tube exchangers per the ASME
Code Section VIII division 1 section UHX. You can use the program to analyze multiple loads cases for
both the corroded and uncorroded conditions.
Half-Pipe
This program determines required thickness and MAWP for half-pipe jacketed vessels per the ASME
Code Section VIII division 1 appendix EE.
Large Openings
This program analyzes large openings in integral flat heads per the ASME Code Section VIII division 1
appendix 2 and appendix 14. Required thickness, MAWP and weights are computed for geometries with
or without an attached nozzle.
Rectangular Vessels
This program analyzes non-circular pressure vessels using the rules of the ASME Code, Section VIII,
Division 1, Appendix 13. Most of the vessel types in Appendix 13 are analyzed for internal pressure,
including reinforced or stayed rectangular vessels with a diametral staying plate. All membrane and
bending stresses are computed and compared to the appropriate allowables.
WRC 297 / PD5500 Annex G
This program calculates the stress analysis of loads and attachments according to the Welding Research
Council bulletin 297 (WRC 297) and the British Standard Annex G (PD:5500). The WRC 297 bulletin,
published in 1984, attempts to extend the existing analysis of WRC 107 for cylinder-to-cylinder
intersections. PD:5500 Annex G provides an analysis of stress in cylindrical or spherical shells due to
attachment loads. Complete material databases for ASME Sec VIII and Div-1,2 are available. In the case
of PD 5500, the complete material database found in Annex K is also included.
Appendix Y Flanges
This module performs a stress evaluation of Class1 category 1, 2, or 3 flanges that form identical flange
pairs, according to the latest version of the ASME Code Section VIII Division 1 Appendix Y.
Summary
Displays a description and evaluation of all the components of a pressure vessel or heat exchanger.
Design pressure, temperature, material, actual thickness and Maximum Allowable Working Pressure are
shown for each component.
1-8 PVElite User Guide 2005
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