The compressed air pressure is 25 MPa, there are no corrosive substances, and the pipe temperature is 55°C. How should the pipe material be selected? Is 20 carbon steel suitable?
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The compressed air pressure is 25 MPa, there are no corrosive substances, and the pipe temperature is 55°C. How should the pipe material be selected? Is 20 carbon steel suitable?
20 carbon steel, at a temperature of 55°C, with an allowable stress of 130 MPa – this should meet the requirements
It is recommended to use 20G material; boiler tubes require stricter quality standards and offer better performance. Experienced owners generally make such requests, simply due to experience. .
Are there any relevant specifications for the selection of steel pipe materials?
I’ve never come across air compressors with such high pressure before; I was wondering what they are used for? Of course, I’ll wait for the replies from the experts to learn*.
Using 20 steel is fine; make sure to choose in accordance with GBT 6479-2013 \"Seamless Steel Tubes for High-Pressure Fertilizer Equipment\"
It’s definitely not suitable; the main reason is the excessive pressure. For 20-carbon steel, the maximum pressure is 72 kilograms, while 25 MPa requires 250 kilograms – carbon steel simply cannot withstand such pressure. . . . This is my own understanding based on the information I’ve read; it’s not necessarily correct. . .
There’s a slight issue with this; I checked GB150 specifically. For 20-carbon steel, at 55 degrees Celsius, the allowable stress is around 130 MPa when it’s below 10 mm, and around 120 MPa when it’s below 100 mm. So it should be usable. Why don’t you check again?
I can’t send screenshots; otherwise I’d show them to you