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P ETROLEUM U NIVERSITY OF T ECHNOLOGY A BADAN F ACULTY OF P ETROLEUM E NGINEERING Design of pressure...
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Transcript of P ETROLEUM U NIVERSITY OF T ECHNOLOGY A BADAN F ACULTY OF P ETROLEUM E NGINEERING Design of pressure...
PETROLEUM UNIVERSITY OF TECHNOLOGY
ABADAN FACULTY OF PETROLEUM ENGINEERING
Design of pressure vessels using PV Elite
By:Aslan Momeni9209214
Spring 2014Abadan-Iran
Principles of
pressure vessels
Definition as related to Standard:
EN 13445: A pressure vessel is a closed container designed to hold gases or liquids at a pressure substantially different from the ambient pressure.And other standards such as ASME section VIII and etc.The PVElite software can design pressure vessels base on ASME , PD5500 , EN13445.
Shape of the pressure vessels.That is divided in two major groups:• Cylindrical pressure vessel.• Spherical pressure vessel.
Cylindrical Spherical
Formation components of pressure vessel:• Shell• Saddle• Lifting lug• Leg lug• Skirt• …
The information of the pressure vessel that designed by process engineering group classify in Design Data Sheet(DDS).
Basic part of the pressure
vessels.
Shell:That is the basic part of the pressure vessels and mainly manufactured by rolling of the flat sheets.
Head section:
Various type of the head section:
Flange:
Nozzles:Are used for leading the follow in or out , install equipment , ventilation and etc.
Various type of the nozzle:
Set-through Set-in
Set-on
Various type of the support:
Saddle that are used for horizontal pressure vessel.
Skirt that are used for vertical pressure vessel.
Lug support
Leg support
The information
that we should know!
Pressure:
• Absolute pressure
• Gauge pressure
• Atmospheric pressure(101325 Mpa)
• Operation pressure
• Design pressure
• Maximum allowable working pressure
• Maximum allowable pressure , new and cold
• Hydrostatic test pressure
Temperature:
• Operation temperature
• Design temperature(UG-20)
• Minimum design metal temperature
Loading:• Loading that caused from internal and external pressure• The weight of vessel and contents• The weight pump , duct , pipe and etc• Loading that caused from earth quake , wind and etc• …
Allowable tensile stress:ASME Appendix 1 sectionII part D
Allowable compressive stress:ASME Appendix 1 sectionII part D
Some calculations
(just for shell of the pressure vessel)
Hoop stress(P≠ 0.385SE , t≥0.5R ):
P=internal pressure(psi)
S=maximum allowable stress(psi) sectionII , part D
R=internal radius(in)
t=minimum require thickness of shell(in)
E=joint efficiency UW-12
Longitudinal stress(P≤1.25SE , R≤0.5t ):
Spherical shells(t≤0.365R , P≤0.665SE ):
corrosion situation:Rnew = Rold + corrosion allowance.
Post Weld Heat Treatment(PWHT) and Preheat:Are needed when the thickness are more than 1 inch.
Radiographic(base on table UW-12 for P.No and Group No):
Otherwise , spot radiography is adequate!