When is pipe stress analysis required?

When is pipe stress analysis required?

This article will help you to understand a little more about pipe stress in simple words, as well as how and when it can be analysed as part of engineering projects.

Our culture and experience is tailored to working on high integrity systems within highly regulated industries. As such, we are well versed in all of the fundamental engineering simulation and analysis principles.

Pipe stress analysis falls under this category, and in this short article, we will discuss the concept for the general reader. It will help you to understand a little more about pipe stress in simple words, as well as how and when it can be analysed as part of engineering projects.

What is pipe stress?

Piping systems are used in a whole variety of industries where liquids or gases need to be transported. Pipe stress, therefore, is the term used to describe stresses and deficiencies that may arise as a result of:

  • Deadweight
  • Internal pressure
  • External pressure
  • Thermal loads
  • Seismic loads
  • Vibration
  • Liquid abrasiveness

What is pipe stress analysis?

Pipe stress analysis is the study of stresses in a piping system. Using calculation based simulation, engineers perform analysis work to ensure the structural integrity and operability of piping systems.

It is highly likely that system failures will occur without this critical analysis during the design stage of a construction project. Pipe stress analysis should account for any eventuality that could lead to negative system performance or complete failure.

rohr2 pipe stress analysis

When is pipe stress analysis required?

Fundamentally, pipe stress analysis is required to provide assurances that the stresses in the piping system are within the regulated limits or any applicable codes and standards. This means that any new piping system requires pipe stress analysis work as part of the design stage. This may be to:

  • Account for thermal expansion and ensure that the piping system has flexibility for this
  • Make pipe stress calculations that aid the choice of pipe support
  • Ensure loads on any supporting structures are safe and acceptable
  • Proof the piping system against any future seismic activity
  • Keep the piping connected equipment nozzle loads within the specified allowable limits, referencing the relevant standards (e.g. API 610, API 661, API 667, ASME sec III and so on)

Stress analysis should be undertaken for piping systems that are:

  • Due to operate in extreme conditions such as high or low temperatures, consistently high winds or the threat of seismic activity
  • Used for transitions from above-ground systems to underground systems
  • Utilising medium or large-sized piping, due to their configuration, operating conditions and lack of flexibility
  • Connecting machinery and equipment together

There are instances whereby further pipe stress analysis can be required for existing piping systems.

As systems change, there may be situations where engineers need to solve dynamic problems in piping such as an increase in mechanical or acoustic vibration. Pipe stress analysis can be used to determine whether those increases are jeopardising the structural or operational integrity of the piping system.

rohr2 for pipe stress analysis

Pipe stress analysis with ROHR2

The ROHR2 software suite is regarded as the leading European software for pipe stress analysis work. A CAE system, it powers dynamic structural framework analysis of complex piping networks and engineers looking to establish, expand or improve upon their pipe stress analysis.

To learn more, click here: ROHR2 Pipe Stress Analysis