What are the meanings of the abbreviations for various steam symbols?
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In chemical plants, there are various types of steam: SS, HS, MS, LS, as well as DS, and dilution steam. I would like to ask, what is DS? And what is diluted steam? This post was last edited by *aohe8888 on 2008-12-15 20:47.]
I hope my friends on Haiyou can help me. I know there is low-pressure steam, medium-pressure steam, and high-pressure steam, as well as unsaturated steam and saturated steam, but I don’t know the abbreviations for them. Please help me a lot; it would be great if the information were comprehensive. Thank you in advance!
Low-pressure steam is LS； Medium-pressure steam is MS ； High-pressure steam is HS ； Dilution steam is likely named based on its functional use; for example, when steam is needed to dilute a certain material, it is called dilution steam. As for what DS is? Please, experts, go ahead.
SS is superheated steam, HS is high-pressure steam； MS is medium-pressure steam ； LS is low-pressure steam, and DS is likely the diluted steam mentioned by the original poster. This post was last edited by beileim1 on 2008-12-16 07:56.]
The way these names are represented may vary depending on the compilation methods of different companies.
Take a look at this: http://bbs.hcbbs.com/viewthread.php?tid=201513&highlight=%B9%DC%B5%C0%D2%C7%B1%ED%C1%F7%B3%CC%CD%BC%CE%EF%C1%CF%B4%FA%BA%C5%BA%CD%CB%F5%D0%B4%B4%CA HG 20559.5-1993 – Material codes and abbreviations in piping and instrumentation diagrams
The poster’s question concerns the explanation of ethylene plants: SS: Super-high pressure steam, sometimes also written as SHP, with a pressure of 11.5 MPa； HS: High-pressure steam, sometimes also written as HPS, with a pressure of 4.0 MPa ； MS: Medium-pressure steam, pressure 1.1 MPa ； LS: Low-pressure steam, pressure 0.35 MPa ； DS: Diluted steam, used to prepare the feed for the pyrolysis furnace, with a pressure of around 0.6 MPa.
It’s quite complex. Here, we use the capital letter S followed by the pressure level number in the lower right corner to indicate the steam grade, which makes it easier to understand
A friend replied earlier that \"low-pressure steam is LS\"； Medium-pressure steam is MS ； High-pressure steam is denoted as HS, while low-pressure steam, as I know it, is LPS; medium-pressure steam is STM. There is another way of naming steam based on its pressure – for example, 40-kilogram steam is referred to as S40. Therefore, the abbreviations used to represent steam vary depending on the conventions of different devices and systems. In response to the original question, I think the answer for floor 7 is correct!
DS: Saturated steam at reduced temperature and pressure. Others agree with the explanation on floor 7.
I’ve heard of humidified reduced-pressure steam; I’m not sure if that’s correct