Inspection Before, During and After Welding is Critical

Checklists for the CWI, welder and other production personnel

Weld inspection should not just take place after welding. Inspection before and during welding is critical.  But what can you inspect if welding has not been performed? Take a look at the checklists below for pre, during and post weld inspection.   Most of these items fall under the responsibility of the welding inspector, but any party involved […]

5 MORE Questions You Should Know for the CWI Exam

And fundamental principles for the fabrication of steel structures

Today we’ll cover 5 more very important concepts that are governed by the AWS D1.1 Structural Welding Code (Steel). If you missed our last post with the first five questions simply click here.  These concepts can show up as questions in the Certified Welding Inspector (CWI) Exam. As stated in our article from last week, […]

5 Questions and Answers You Must Know for the CWI Exam

And fundamental principles for the fabrication of steel structures

If you have taken or hope to take the CWI exam you probably have searched for some practice exam questions.  In practicing for the code book portion of the test you may have come across a few questions for which you could find the answer, but didn’t really understand the importance of the question or […]

What To Do When Welding Codes Are Not Clear

Or when the code does not provide enough information to make an important decision

If you are a CWI, welding engineer or serve in a capacity that requires you to use and interpret welding codes, you probably have run into instances where the code is not very clear.  Many of the questions we receive from our readers deal with interpreting codes and standards.  Many times it is not about […]

5 Common Mistakes Made When Estimating Welding Costs

Read this before you bid on a welding contract

When bidding jobs several fabricators end up calculating their costs associated with welding and then double that number to be safe. In some cases, that isn’t even enough. It is important to have a clear understating of how to translate the amount of welding to be done to actual manufacturing costs. One of the biggest challenges is that rework and overwelding is […]

21 Changes to PQR Essential Variables that Require WPS Requalification

​Have you ever seen a welding procedure specification with established amperage ranging from 200 to 550 amps? Or voltage ranging from 21 to 29 volts? Or some other variable with a huge window? This is all too common, but extremely dangerous. Why? Because changes to essential variables beyond that which is reasonable will affect the […]

7 Areas of Study for Aspiring Welding Engineers

Welding engineering is a complex field that requires expertise in many different engineering disciplines.  The welding engineer must take advanced courses in metallurgy (including welding metallurgy), material science, mechanics of materials, thermodynamics, chemistry and fundamentals of all welding processes.  Welding engineers are tasked with many different activities which include but are not limited to:   […]

What is a Qualified Welding Procedure?

A qualified welding procedure is a welding procedure that has been proven to produce sound welds after undergoing extensive testing.  When using structural welding codes, these tests include both destructive and nondestructive tests. Some of these tests are: Visual examination Macroetch Break test Bend test Ultrasonic inspection Radiographic inspection Hardness test Tensile test The reason […]

Why prequalified welding procedures are exempt from testing

Prequalified joints provide values for groove angles and allowed deviations (tolerances). Tolerances allow for wider groove angles but not narrower. To get a narrower angle the root opening must be increased .

One of the advantages of using prequalified welding procedures is that you can save a lot of time and money because they are exempt from testing.  This means you don’t need to perform any destructive or nondestructive testing.  You simply follow the requirements of AWS D1.1 and you can write a prequalified welding procedure and […]

Riveting vs. Welding: The Pros and Cons

Many times, especially in steel erection, we need to mix welded and bolted (or riveted) connections.  It is very important for the design engineer to know the implications on mixing welds and bolts as it pertains to connection strength, fatigue life, manufacturing costs and the skill level required to make these connections. However, sometimes the […]