For chemical process pipelines, is it allowed to make openings using thermal cutting methods (oxygen cutting, plasma cutting)?
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As the title suggests, for chemical process pipelines, is it permissible to use thermal cutting methods (oxygen cutting, plasma cutting) to create openings?
The scope of chemical process pipelines is very broad, especially regarding various types of utility systems. Is it permissible to use thermal cutting methods (oxygen cutting, plasma cutting) to create openings in carbon steel pipes? It is permitted according to the standards, but the cutting must be done neatly and the oxide layer must be removed. There are some high-alloy steels for which hot cutting is not allowed. Nowadays, efforts are being made to avoid hot cutting on-site, by replacing it with components such as branch tee connections
Thermal cutting (oxygen cutting, plasma cutting) is generally not allowed for making openings in chemical process pipelines. Since thermal cutting generates high temperatures and sparks, it may pose a risk of fire or explosion in chemical pipelines. Moreover, thermal cutting can also cause deformation or damage to the pipe material, affecting its performance and safety. Therefore, when performing hole-making operations on chemical process pipelines, other methods are generally used, such as safe and reliable techniques like cold cutting or mechanical cutting. .
Excuse me, are there any regulations or guidelines in this regard?
Those with low requirements can use this method: perform gas cutting followed by mechanical grinding. The main drawback is that the cut surface is uneven, and it is difficult to ensure welding quality