A Welding Procedure Specification (WPS) is a formal written document describing welding procedures, which provides direction to the welder or welding operators for making a sound and quality production welds as per the code requirements . It is essential that all the welded joints are sound and have suitable properties for their application when fabricating…
Category: Welding
A Video About AC Welding From The 1944
I love old instructional video like this. The narrator always sounds enthusiastic and motivating. The fact provided is also brief and easy to understand. This short instructional video about AC arc welding is from 1944. It discusses the advantages of AC vs. DC arc welding and how arc blow (caused by magnetic disturbances) is minimized with…
5 Awful Mistakes You’re Making as a Welding Inspector
As a welding inspector, sometimes you have too much work to do in a day. You struggle to finish your task but somehow you’d miss a thing or two unintentionally. Whatever it is, try not to make these 5 awful mistakes; 1. You didn’t verify the welding material One of the most important duties of a…
A Step-by-Step Guideline on How to Become a CSWIP 3.1 Certified Welding Inspector
CSWIP is an international scheme accredited by the United Kingdom Accreditation Service (UKAS). CSWIP scheme certifies and assures personnel competence to ISO/IEC 17024. For instance, personnel engaged in welding, joining, materials integrity and inspection in manufacturing, construction, operation or repair of high integrity structures, plant or machinery. A certified CSWIP 3.1 welding inspector is simply a…
Solid Inclusions in Welding
The four common type of solid inclusions usually found in welding are; Slag inclusions Flux inclusions Oxide inclusions Metallic inclusions Type of solid inclusions Let us go through these inclusions one by one. 1. Slag Inclusions Slag inclusions are slag that is trapped during welding. They have an irregular shape so the appearance…
Gas Pore, Worm Holes and Surface Porosity
There are 3 common types of weld cavities; They are gas pore, wormholes and surface porosity (including Crater pipe). Let us explore them. 1. Gas Pore A gas pore is a trapped cavity within the weld metal that has a basic round shape and comes in a form of isolated, elongated cavity and surface pore. Meanwhile, a…
What is Heat Input in Welding?
Heat Input is a measure of how much energy has been supplied to the work-piece to form a weld. It is measured in units of energy per unit length. In Europe, this tends to be in kJ/mm, whereas in America it tends to be kJ/in. When welding on certain materials, take into consideration that cooling…
What are cracks?
Cracks are imperfection formed in the solid state of welding or metal. In particular, cracks are caused by a local rupture, as a result of cooling effect or stresses. The geometry of cracks produces a huge stress concentration at the crack tip, as a result, making them more likely to cause a fracture. This is why…
Hotwire GTAW
Have you ever come across a welding process called Hotwire Gas Tungsten Arc Welding? I used to work with a company that manufactures subsea hardware components. One of the main welding process used in the weld-shop is the Hotwire GTAW. It operates using automatic Fronius welding machine. We use the machine to build overlay on the…
10 Main Features Of A Completed Weld
How much do you know about your weld? Here are 10 Main Features Of A Completed Weld; 1. Parent metal – Metal to be joined or surfaced by welding, braze welding or brazing. 2. Filler metal – Metal added during welding, braze welding, brazing or surfacing. 3. Weld metal – All metal melted…
Imperfections or Defect?
When there is an anomaly in the completed weld, some are quick to refer it as defect, while others called it imperfection. But are they similar or is there a different between the term ‘imperfection‘ and ‘defect‘? According to BS EN ISO 6520-1, Imperfection and Defect has a slight different definition; Imperfection is define as…
