Selection of pressure tap material
Thread Content
For the measurement of steam pressure at the turbine inlet, with a maximum temperature of 540 degrees and a pressure of 9.8 MPa, I would like to know what material should be used for the pressure tapping tube of the transmitter If special materials are used, should they be applied only at the front of the condensation tank, or should the entire pressure tapping pipe be made of such materials? I’d appreciate some guidance from those who know more about this. Thank you!
First, check what material is chosen by the process engineering team, and then look up information regarding the allowable stress of that material at operating temperatures. Generally, it’s sufficient to follow the choice made by the process engineering team; if one wants to understand this better, then they need to study the properties of the material in question
Steam pipes, copper pipes, stainless steel pipes – all are fine; copper is a good choice, it has a yellow color and looks impressive. It’s also easy to bend. The leaders are yellow in color, and they’re quite flexible (⊙ o ⊙ ). Maybe even galvanized pipes would work? I just don’t know if there are thin-walled galvanized pipes with a diameter of less than 4 inches ~~~~~~~~~~55555555555555555~~~~~~~~~~~~~~~~~
I get headaches as soon as I meet you, with all that talk about bird songs. Can you speak properly? Although I shouldn’t interfere with what others say and should be tolerant, the more I watch it, the less I can stand it~~~~~~
The pressure guide tube can be made of carbon steel or stainless steel; stainless steel is recommended. As for the diameter of the pressure guide tube, 18*4 or 14*4 will work.
I think stainless steel is better; it requires less maintenance in the long run. You shouldn’t cut costs on this aspect. Carbon steel will still rust, as a thermal insulation layer has to be added on the outside.
Stainless steel should be a good choice; if you have professionals in the field of piping, consult them – they will be able to recommend a more suitable material for you.
Is this high temperature related to the high-pressure turbine 103-J? Process pipelines are generally made of manganese steel. The instrumentation can use 18*3 or 22*4 stainless steel pipes
It seems that using stainless steel for the pressure guide tube is indeed an option, but you should consider the difficulty of installation. The instrumentation should be easy to install; avoid using bent pipes for installation, unless the pipes are pre-made first. It’s best to use thick-gauge copper pipes, as they facilitate easier installation
Oriole language: you’re biting the egg~~~~~~~~~~~~~~~ This is called a compatible bird :P
It should be the same material as that used for the process pipelines; stainless steel pipes are not recommended. Austenitic stainless steel is prone to stress corrosion under steam at 260 degrees, so it is advised that the person in question consult the standard GB5310 (Seamless Steel Tubes for High-Pressure Boilers) to see whether material 20G is suitable.