Can plastic-coated copper tubes be used in a 31% salt-acid environment?
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There is a pressure sampling pipe with a DN15 diameter; one end of it is fitted with a flange (DN15) for connection to the main pipeline, while the other end has external threads for connecting to a pressure gauge. The original material of this pipe was plastic-lined steel pipe. Due to its proximity to the pipeline carrying acid (31% salt acid), and because the flanges on plastic-lined steel pipes of small diameter are prone to cracks and pores, the welds on this pipe are susceptible to corrosion. So now, considering replacing it with plastic-coated copper pipes, the pressure is generally around 0.4 MPa. Dear sea friends, is it possible to make a replacement? If it needs to be replaced, how should the flange be replaced?
Why is no one paying attention? Help!
Is a plastic-coated copper tube one with plastic on the outside and a copper tube inside? Copper tube for salt transport – acid? This definitely won’t work
Why not use acid-resistant nickel-based pipes directly? This is an instrument pipe, and the instrument manufacturer can be asked to provide it
Could considering using diaphragm flanges for the conversion be an option? So, a regular pressure gauge or transmitter can be used?