Which standard does this come from?
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8.62 In addition to complying with the requirements of GB50235GB50236, the installation, welding, construction, and acceptance of pipelines should also meet the following requirements. When welding carbon steel and stainless steel oxygen pipelines, argon arc welding should be used as the base b) Mechanical methods should be used for cutting and beveling of pipelines; the prefabricated length of the pipeline should not be too long, and it should be easy to inspect the installation, welding, and cleanliness quality of the internal and external surfaces of the pipeline.
In fact, for some questions that arise on site, the first thing to do is to understand the reasons and principles of its regulations. The particularity of central enterprises determines that this must be done to ensure safe use. The oxygen pipeline is most afraid of mechanical impurities inside. Driven by the high-speed flowing oxygen, mechanical impurities will rub against the pipeline, which is too dangerous. Even if there is no such requirement, the installed pipelines must be easily inspected and cleaned of internal impurities to ensure normal use.