Ask for advice: Instrument pressure pipe and source pipe?
Thread Content
Please give me some advice: Recently, I heard on site that the instrument pressure-guiding pipe and source pipe cannot be welded by hand and must be welded by argon arc welding. What are the two pipes mentioned above used for? What kind of pipes should be connected to general instrument parts? Someone who knows something can explain it to me, thank you.
1. In the vernacular, the instrument pressure guiding pipe refers to the source pipe from the root valve to the measuring component. It leads the measuring medium directly or indirectly to the measuring source receptor to achieve the detection conditions. Generally, joint connection is used. When welding is required, argon arc welding must be used to ensure quality and high measurement accuracy requirements. 2. The source pipe refers to the source pipe from the measured body to the root valve. It is generally connected by welding. In order to ensure quality, high measurement accuracy requirements and reduce interference factors, argon arc welding must be used. 3. Other pipes depend on the specific situation, such as purge pipes, heating pipes, etc.
Can you tell me the basis for "must"? Alloy steel needs to be welded by argon arc, but carbon steel and stainless steel should also be welded by argon arc? Are there any standard regulations?