Technical Guides

These documents have been developed based on hundreds of hours of research, decades of experience and a deep understanding of industry needs.

We have distilled down the information you need into clear and simple language so that you can immediately put it into action and reap the benefits

Please contact us if you would like to know more about any of these guides prior to purchasing, or if you would like custom training or further technical support.

$49 including GST

This document provides detailed instructions regarding how to use the Crack Arrest Hole method to prevent fatigue crack growth. The CAH method may be used

1) To extend asset life when it is not feasible to do an effective weld repair, or

2) As an interim solution until such time as a weld repair can be made

By learning how to correctly use the CAH method, you can keep your critical assets running with minimal downtime, minimal tooling required, and most importantly minimal risk of failure.

This guide provides a summary of key points based on AASHTO and research articles. Save yourself time and money in and avoid the common pitfalls many make in attempting to use the CAH method by purchasing this technical guide.

11 pages

$10 including GST

Understanding the causes of residual stress and how to minimise or remove them are key to achieving an effective weld repair.

The following topics are covered in this document

  • Causes of residual stress

  • Why residual stresses can be bad

  • Options for residual stress reduction

    • Welding methods

    • Inter-run Peening

  • Post Weld Heat Treatment

  • Vibratory Stress Relief

  • HFMI and Surface Peening

  • Crack repair best practices

13 pages

$10 including GST

For structural welding, welders must be qualified as per the requirements of AS/NZS 1554.1. This may be achieved either via direct qualification to the standard, or via qualification to other standards such as ISO 9606.1. However, there are certain implications associated with using one pathway over another - principally due to the differences in the acceptance criteria between ISO 9606.1 and AS/NZS 1554.1.


This document provides a visual comparison of the acceptance criteria used for welder qualification via AS/NZS 1554.1 SP or ISO 9606.1 in order to easily understand which has the more stringent assessment criteria for various defect type. This is intended to be informative regarding the potential pros and cons of each option in order to assist in selecting the most appropriate pathway for welder qualification in order to comply with the requirements of AS/NZS 1554.1.

12 pages