Ultrasonic Examination Part 1 Ultrasonic examination uses the same principles as the sonar used for the detection of submarines – a sound wave is emitted from a transmitter, bounces off any objects in its path and is reflected back to a receiver, somewhat similar to shining the beam of a torch at a mirror. Knowing […]
The latest figures released by Statistic SA in July 2018, indicated that the current unemployment rate in South Africa is 27,2%, and the percentage of young persons aged 15–24 years who were not in employment, education or training is a staggering 31,6%. So, in these times of economic uncertainty, finding something that will almost certainly
NDT – A Very Viable Career Choice Read More »
17 May 2018 Looking back and thinking about our organization, the Southern African Institute of Welding (SAIW), I was struck by the fact that, amongst all the things that happened in the year 1948, it was the year that the SAIW was founded and the year the Nationalist Apartheid government came to power. What a
SAIW 70 Years on … …a word from the President, Morris Maroga Read More »
Radiography Part 3 The previous two articles dealt with what may be termed conventional radiographic techniques employing either gamma- or X-ray sources and photographic film. The development of electronics, in particular the increase in computing power over the last 20 or 30 years, has enabled what were laboratory based radiographic methods – real time radiography
ISO 15614-1 Second edition 2017-06 – Part 2 in our series Specification and qualification of welding procedures for metallic materials – Welding procedure test – Part 1: Arc and gas welding of steels and arc welding of nickel and nickel alloys The new version of the standard was published during June 2017 as ISO 15614-1:2017
Focus on Standards Read More »
Visual Testing You see, but do you observe? Introduction Visual testing is the most common and essential of all Non-Destructive Testing (NDT) methods. Unlike other NDT methods which require either special equipment or consumables to reveal an indication, visual testing, in its most common form, only requires one to look at a surface and interpret
ISO 15614-1 Second edition 2017-06 Specification and qualification of welding procedures for metallic materials — Welding procedure test — Part 1: Arc and gas welding of steels and arc welding of nickel and nickel alloys The new version of the standard was published during June 2017 as ISO 15614-1:2017 and is in the process of
Focus on Standards Read More »
SAIW a one-stop-shop for consumable testing and verification Confidence Lekoane Despite it being a subject that has been intensely researched over the decades, Hydrogen in weldments of steel, particularly high-tensile and high strength low-alloyed steels continue to limit the performance of components due to the negative effect on the properties of the metal. Embrittlement, cracking and
Consumable Testing and Diffusible Hydrogen in Weldments Read More »
Earlier this year, the winner of the 2016 SAIW Youth Challenge, Phillipus Terblanche, brushed aside fellow competitors at the WorldSkills SA competition to earn the opportunity to represent South Africa at the WorldSkills International Competition, which was held in Abu Dhabi from 14-19 October 2017. According to WorldSkills S.A.’s National Expert and convenor of the
WorldSkills in Abu Dhabi … … the good and the not so good Read More »
The previous article dealt mostly with the basic principles of radiography – this part will cover the methods of ensuring that a radiograph is of an acceptable quality and capable of showing relevant imperfections. As mentioned in the previous article the quality of a radiograph is assessed using three factors: density, contrast and definition or
JOB KNOWLEDGE 125 Radiography Part 2 Read More »
