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Keeping Quality High in Pipe Welding Applications

18 October, 17 4:39 pm · Leave a comment · reddarc
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“You should give as much consideration to the preparation as you do to the actual welding”

Pipe welding is utilized all around the world in diverse industries. A variety of pipe sizes and material grades are joined to manufacture components of various shapes and lengths – from a few feet to many miles. Even though most pipe welding jobs have custom specifications – there are some fundamental aspects of pipe welding that form a common thread for welders and welding engineers alike in order to achieve high quality welds in pipes.

 

Selecting The Right Pipe Welding Equipment

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Equipment selection is the top requirement for producing good quality pipe welds. The highest priorities when selecting welding equipment for pipeline welding are reliability, consistency, accuracy and process control. It is also critical that the equipment is easy to use and the controls are intuitive. In addition to equipment performance, the work environment also needs to be a key factor for equipment selection. There are pipe welding configurations designed for offshore welding, remote land based pipeline welding, general fabrication shop use and custom configured automated pipe welding systems. Selecting the right one can be a daunting task – it is always good practice to seek expert advice.  Be sure to ask about the various options, capabilities and limitations of each system. When welding CRA (Corrosion Resistant Alloy) grades, it is necessary to use weld purging in order to guarantee the corrosion performance of the root run. The importance of this should not be underestimated.

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The 5 Most Common Mistakes Found by Welding Inspectors

10 August, 17 9:04 am · Leave a comment · reddarc
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welding-inspection-01Welding inspectors have a responsibility to the company they work for and the general public to ensure that weld quality is satisfactory.  Failure to fulfill their duties can result in property damage, injury, and death.  Most welding inspectors, therefore, take their job very seriously.  Welding inspectors spend years honing their ability to detect and size welding discontinuities and defects.  While they must be proficient at identifying all discontinuities and defects, some of these weld irregularities are more readily detectable than others.

1. Surface Porosity

Porosity is gas that has been trapped in the weld; this results in cavity formation within the weld.  Porosity can cause reduced weld strength.  Welding inspectors who are not trained in other forms of nondestructive testing are limited to viewing the surfaces of welds.  So while not all forms of porosity can be detected by a welding inspector, porosity that extends to the surface of the weld can.
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Airgas, an Air Liquide company, is the nation's leading single-source supplier of gases, welding and safety products. Known locally nationwide, our distribution network serves more than one million customers of all sizes with a broad offering of top-quality products and unmatched expertise.