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Job Knowledge

Helpful articles with information about welding processes.

Mechanical Testing - Tensile Testing Part 1

Tensile testing is described, covering test specimen form, determination of the engineering stress/strain curve, and derivation of test results: ultimate...

Mon, 19 October 2015

Mechanical Testing - Tensile Testing Part 2

To approve a butt welding procedure most specifications such as BS EN 288 Parts 3 and 4 and ASME IX...

Mon, 19 October 2015

MIG Welding

The principles of MIG welding are outlined including process characteristics, metal transfer modes, shielding gas types and process applications.

Wed, 24 January 2018

MIG/MAG – Developments in Low Heat Input Transfer Modes

Since its initial development in the late 1940s, the MIG/MAG process has seen several iterations in equipment development; which have...

Mon, 19 October 2015

NACE TM0177 – Sour Test Methods

Summarises the solution chemistries, solution volume: surface area ratio, test duration, specimen geometry and loading for each of the tests...

Fri, 16 March 2018

Non-destructive Examination (NDE) Part 1 Liquid Penetrant and Magnetic Particle Inspection

Summarises these inspection methods as a supplement to visual inspection

Tue, 20 October 2015

Notched Bar or Impact Testing Part II

An overview of impact testing of welds and some of the factors which affect the transition temperature, such as composition...

Mon, 19 October 2015

Optimisation of Repair Schemes for Service Aged Components

Cr-Mo steels are used extensively for high temperature applications in industry but, while they have good weldability, they also present...

Fri, 11 August 2017

Oxy-fuel (Oxyacetylene) Welding

The principles of the oxyfuel gas welding process are presented including flame types, equipment, operating characteristics and techniques. (Oct. 1994)

Fri, 30 September 2016

Oxy-fuel Gouging

The principles of flame gouging are outlined including process characteristics, operating parameters and techniques.

Fri, 30 September 2016

Oxyacetylene Welding, Cutting and Heating

Guidelines are given on the principal health and safety considerations for oxyacetylene welding to ensure safe welding practices.

Mon, 19 October 2015

Oxyfuel Cutting - Process and Fuel Gases

The oxyfuel cutting process is introduced. Characteristics of the common fuel gases - acetylene, propane, MAPP (methylacetylene-propadiene), propylene and natural...

Mon, 19 October 2015

Plasma Arc Cutting - Process and Equipment Considerations

The plasma cutting process is described covering process characteristics, power source, cut edge quality and process variants (dual gas, water...

Mon, 19 October 2015

Plasma Arc Gouging

The principles of plasma arc gouging are outlined including process characteristics, powers sources, electrodes, plasma and cooling gases, and operating...

Fri, 30 September 2016

Plasma Arc Welding

The principles of plasma welding are outlined including process characteristics, operating modes, power sources, arc starting, electrodes, plasma and shielding...

Fri, 30 September 2016

Power Source Characteristics

The prime objective of an arc welding power source is to deliver controllable welding current at a voltage demanded by...

Tue, 20 October 2015

Precipitation Hardening Stainless Steels

The precipitation hardening (PH) stainless steels are a family of corrosion resistant alloys some of which can be heat treated...

Tue, 20 October 2015


The fundamentals of how x-radiation is used to identify buried defects are explained.

Tue, 20 October 2015

Radiography Part 2

The previous article dealt mostly with the basic principles of radiography – this second part will cover the methods of...

Tue, 20 October 2015

Radiography Part 3

The development of electronics, in particular the increase in computing power over the previous 20 or 30 years, has enabled...

Mon, 19 October 2015

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