Pipes Lines Tubes
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This post was last edited by lflsedin on 2018-7-9 21:11. I hadn’t paid much attention to this concept before: A pipeline is a device made up of pipes, pipe fittings, valves, etc., used for transporting gases, liquids, or fluids containing solid particles. Some people on the Internet also say that both “pipeline” and “tube” refer to specialized facilities used for transporting specific media, and they can be used interchangeably ； ““Pipeline” is more commonly used in macroscopic contexts, such as in planning and design, while “pipe” is more often used in specific engineering tasks, such as construction and installation ； “\"Pipeline\" also refers to the path that the pipeline takes, and its meaning is abstract ； “A “pipe” is made of relevant materials and is a tangible object. In the large pot scale, there is also the term “tube”. It’s a universal group – please explain things to me clearly as well!
It feels like I’ve hit a dead end.
If it weren’t for this standard, I wouldn’t have thought of drilling! :lol
Language is just like that; as long as a word is used that others can understand, that’s enough
Heated surface: A metal or non-metallic surface (such as tubes or the corrugated plates of air preheaters) that absorbs heat from the heat-releasing medium in the furnace and flue, and transfers it to the working fluid. Collecting tank: A cylindrical pressure vessel used in steam systems to collect and distribute the working fluid. Pipes: Channels for the flow of the working fluid (in my opinion). Article 23 of the original Steam Regulations: Listed alongside the header tank is “steam pipes”; Article 19 of the original Water Regulations: Listed alongside the header tank is “pipes”.
Soda water system: A soda water flow system composed of heating surfaces and pipes within the boiler area.
I think it’s well worth being thorough like this. There were also such disputes over the distinction between tube and pipe within ASME in the past, but actual definitions can be found in the standards. When the definitions of nouns are clear and the rules are well-defined, standards can be applied consistently without variations due to differences in understanding among individuals. I think 16507-2013 is a step backward in this regard. In my opinion, the terms used in the boiler regulations and in 16507 regarding tubes are mostly \"heating surface tubes\", which clearly refers to tubes that serve as the heating surface ； In contrast to this are headers and pipes; pipes refer to other types of tubes besides headers and heat-exchanging tubes, and their purpose is to transport a medium from one component to another. The difference between tubes and pipes lies in whether they are heated.
I used to think that \"guanzi\" was just slang for the piping field. But from a normative perspective, this tube indeed has the local meaning of a pipe
Today, this post passed the high-quality post review, so I’ll take the opportunity to elaborate further: The reason I’m following this topic is to discuss pipe design and selection, as well as potential safety issues or inspections related to boiler pressure pipes. 1. Should the wall temperature of pipes be determined based on the temperature of the fluid flowing through them? 2. If measured by the temperature of the medium, the wall temperature of many 20G \"tubes\" in our device exceeds 460 degrees. But it has been running without problems for over a decade; the fact that there are no problems doesn’t mean it can pass regulatory checks, right?
If we have to be precise, my experience is as follows: 1. Pipelines generally refer to pipelines for the long-distance transport of natural gas and oil products. For example, the API 6D standard is known as the pipeline valve standard. In other words, a pipeline is just a long tube. 2. Pipelines, which are those used for transporting fluids within a factory. 3. Tubes, which are presumably short pipes, such as short sections of pipe, pieces of pipe that aren’t very long. So, in my experience, a very long one is called a pipeline, a moderately long one is called a pipe, and a very short one is called a tube. Of course, this is just my personal opinion; I hope experts will come and correct it!
To elaborate further, although I am using pipes as an example for this topic, what really interests me is the temperature resistance of these pipes. Suppose the water temperature inside the pipe is 250 degrees, or the steam temperature is 440 degrees; meanwhile, the temperature of the flue gas outside the pipe is above 460 degrees – for instance, 560 degrees. Is that acceptable? How can we determine the wall temperature of the pipe? Can 20G be used?