Reference Information

We have been using this material in house and thought others might find it useful.

Charts

Pipe Chart

Click on any size in this useful pipe chart to get dimensions in imperial and metric, before and after undertolerance.

Pressure Vessel Design Tools

These design tools help the user size, choose materials and determine vessel properties such as weight and volume.

These design tools are useful for creating preliminary designs that meet the general rules and guidelines of ASME VIII Division 1. These tools can only be used for interior pressure calculations. For simplicity, not all aspects of the VIII-1 code are included – see the notes on each sheet to determine the scope.

Material Database

A convenient database of allowed design stress of common pressure vessel materials at various temperatures. Provides data required to run many of the other design tools on this page.

Hemispherical Head Design Tool

Calculate the required wall thickness or the maximum allowed working pressure of an ASME VIII-1 hemispherical head. Also calculates the volume and weight. Internal pressure only!

F&D Head Design Tool

Calculate the required wall thickness or the maximum allowed working pressure of an ASME VIII-1 Flanged and Dished Head. Suggested dimensions are provided to calculate a standard ratio head. Also calculates the volume and weight. Internal pressure only!

Elliptical Head Design Tool

Calculate the required wall thickness or the maximum allowed working pressure of an ASME VIII-1 2:1 ratio elliptical head. Also calculated the volume and weight. Internal pressure only!

Pipe Shell Design Tool

Calculate the required wall thickness or the maximum allowed working pressure of an ASME VIII-1 pipe or straight rolled shell. Also calculates the volume and weight. Internal Pressure Only!

Cone Design Tool

Calculate the required wall thickness or the maximum allowed working pressure of an ASME VIII-1 conical section. Also calculates the volume and weight. Internal pressure only! (Aug 2013 update – revised code references)

Cone Layout Tool

Develop a fully thickness corrected flat layout of a conical transition the meets corner to corner at the welds.

Nozzle Design Tool

Run area replacement calculations on ASME VIII-1 nozzles WITHOUT repads. Internal pressure only!

Design Blogs

Solid Modeling Blog

We use SolidWorks as our primary modeling tool, both for making drawings, and for Finite Element Analysis. Here are some of our notes on how to get the most out of SolidWorks.

Checking Work

Checking your work is critical. Two concepts here: A finished design has calculations and drawings that match; and hand calculations can be done much better than they usually are.

This important topic is largely neglected in the formal training of our engineers and technologists. It is the first training topic for our new hires and their career success can partially be measured by how well they follow and then enhance the methods presented here. Once learned, a practitioner soon discovers that checking is not limited to ASME code work.

3 Pen Self Check

An irony of this computer era is that a code calculation and a drawing can be prepared by the same person on the same computer, but all the information on the drawing needs to be hand entered…

Hand Calculations

In this era of computer design hand calculations still play a role in pressure vessel design. Ideas on how to do better hand calculations are discussed. Good and bad computer reports are also discussed.