Design sections

 

Content of Pressure Vessel Software

OhmTech offers software for calculation and design of pressure vessels, shell and tube heat exchangers and boilers to five different national design codes. These are as listed below:

  • EN13445-European Standard for “Unfired Pressure Vessels”.
  • ASME VIII Div.1 “Rules for Construction of Pressure Vessels”.
  • PD5500-British Standard for “Unfired fusion welded pressure vessels”.
  • TBK2-Norwegian Standard “General Rules for Pressure Vessels”.
  • TKN-Swedish Standard “Tryckkärlsnormer”.

Listed below is the content of each standard that are currently included in the software:

EN13445-European Standard for Unfired Pressure Vessels

For more information follow this link.
PD5500-Unfired Fusion Welded Pressure Vessels

PD5500-Unfired Fusion Welded Pressure Vessels

Section Description
2.1-2.3 Material selection and determination of allowable stresses.
3.4 Construction categories and design stresses
3.5.1 Cylindrical/spherical shells under internal pressure
3.5.2 Domed ends
3.5.3 Conical ends and truncated cones
3.5.4 Openings and branch connections
3.5.5 Flat ends and flat plates
3.5.6 Spherically domed and bolted ends of the form shown in fig. 3.5-36
3.6.2 Cylindrical shells under external pressure (including design of stiffeners)
3.6.3 Conical shells under external pressure
3.6.4 Spherical shells
3.6.5 Hemispherical ends
3.6.6 Torispherical ends
3.6.7 Ellipsoidal ends
3.6.8 Procedure by which the departure from the mean circle may be obtained
3.6.4 Spherical shells under external pressure
3.8.3 Narrow faced flanges
3.8.4 Full faced flanges with soft type gaskets
3.8.5 Ungasketed seal welded flanges
3.8.6 Reverse narrow-face flanges
3.8.7 Reverse full-face flanges
3.8.8 Full faced flanges with metal to metal contact
3.9.2 Characteristics of perforated plates
3.9.3 Tubesheets of exchangers with floating heads or U-tubes
3.9.4 Tubesheets of fixed tubesheet exchangers
3.9.5 Allowable shell and tube longitudinal stresses
3.9.6 Allowable tube joint end load
5.8.5 Standard test pressure
Annex B.2-B.3 Cylindrical/spherical/conical shells under combined loading.
Annex F An alternative design approach for compensation using the pressure area method.
Annex G.2.2 Radial loads on cylindrical shells
Annex G.2.3 External moments applied to cylindrical shells
Annex G.2.5 Local loads on spherical shell/nozzle attachments
Annex G.3.2 Support for vertical vessels
Annex G.3.3 Support and mountings for horizontal vessels
Enq.Cas 5500/122 Local Loads on Nozzles

In addition modules for design of skirt and lifting lugs are included.

ASME VIII Div.1 Rules for Construction of Pressure Vessels

Section Description
UG-27 Thickness of Shells Under Internal Pressure
UG-28 Thickness of Shells and Tubes Under External Pressure
UG-29 Stiffening Rings for Cylindrical Shells Under External Pressure
UG-30 Attachment of Stiffening Rings
UG-32 Formed Heads, and Sections, Pressure on Concave Side
UG-33 Formed Heads, and Sections, Pressure on Convex Side
UG-34 Unstayed Flat Heads & Covers
UG-37 Required for Openings in Shells and Formed Heads
UG-38 Flued Openings in Shells and Formed Heads
UG-39 >Reinforcement Required for Openings in Flat Heads
UG-40 Limits of Reinforcement
UG-41 Strength of Reinforcement
UG-42 Reinforcement of Multiple Openings
App.2 Rules for Bolted Flange Connections with Ring Type Gaskets
UG-98 Maximum Allowable Working Pressure
UG-99 Standard Hydrostatic Pressure
App.1-1 Thickness of Cylindrical And Spherical Shells
App.1-2 Thick Cylindrical Shells
App.1-3 Thick Spherical Shells
App.1-4 Formulas for the Design of Formed Heads Under Internal Pressure
App.1-5 >Rules for Conical Reducer Sections and Conical Heads Under Internal Pressure
App.1-6 Spherically Dished Covers (Bolted Heads)
App.1-7 Large Openings in Cylindrical Shells
App.1-8 Rules for Reinforcement of Cone-To-Cylinder Junction Under External Pressure
Part UHX Tubesheets (U-Tube, Fixed and Floating Head)
Vertical Vessels on Skirt Support Including External Loads (seismic, acceleration, wind, blast, etc.)
Vertical Vessels on Bracket Support
Vertical Vessels with Supporting Legs
Vertical Vessels on Ring Support
Tall Tower Design Analysis (seismic, acceleration, wind, blast, etc.)
Horizontal Vessels on Saddle Support Including External Loads (seismic, acceleration, wind, blast, etc.)
Horizontal Vessels on Ring Support
Lifting LUGs
Expansion Bellow
External Loads on Nozzles

TBK2 General Rules for Pressure Vessels

Section Description
5.2 Material selection and determination of allowable stresses.
6 Cylindrical and spherical shells under internal pressure.
7 Conical shells under internal pressure.
8 Cylindrical, spherical and conical shells under external pressure.
9 Dished heads.
10 Flat unstayed heads and flat covers.
11 Stayed flat heads and flat covers.
12 Stays.
13 Reinforcement of openings in shells under pressure.
14 Strength factor of rows of holes in cylindrical shells.
15 Tubes.
16 Cylindrical furnaces under external pressure.
17 Rectangular headers.
18 Flanges.
19 Composite flanges.
20 Screws in flange joints.
21 Flat heat exchanger tubesheets.

TKN – Swedish code “Tryckkärlsnormer”

Section Description
4 Material selection and determination of allowable stresses.
5 Thinwalled spherical shells under internal pressure.
6 Thinwalled spherical shells under external pressure.
7 Thinwalled cylindrical shells under internal pressure.
8 Cylindrical shells under external pressure.
8.2 Stiffening rings.
9 Thickwalled cylindrical shells under internal pressure.
10 Unstayed domed ends under internal pressure.
11 Unstayed domed ends under external pressure.
12 Conical shells under internal pressure.
15 Reinforcement of openings and branch connections.
16 Strength factors.
17 Bolts in flange connections.
18 Flanges.
19 Composite flanges.
20 Flat internal covers.
21 Bolted flat external covers.
26 Flat heat exchanger tubesheets.