Is this plug welding acceptable?
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Can pipes with a wall thickness of 4.5 mm and outer diameters of 25 mm and 16 mm be butt-welded? Pressure 12mpa. Are there any requirements for the gap? Thank you to all the teachers?
Carbon steel and copper pipes should work.
No. A variable-diameter connection is used, with the welds in a butt joint configuration
12Mpa socket welding? Can’t
For small-diameter pipes with a temperature of 12MPA that are not corrosive, socket welding can be used; however, the welding quality must be good. There is no standard that prohibits socket welding. Standard socket weld flanges can reach a pressure rating of CL1500 and a weight of 260KG. Whether to use socket welding or not depends on an assessment of the medium’s pressure and corrosiveness. Conclusion: Under certain conditions, it is possible to use this method
Generally, it’s not possible; a reducer fitting is required
Technical discussions and debates are possible, but if it is to undergo pressure pipeline testing and acceptance later on, it should not be feasible
Ask the teacher again: diameter 16 MM (or even smaller), 12 Mpa, temperature 300 degrees. No corrosion. Can socket welding be used? Because I’ve seen it in actual work, so I want to ask.