How should insulation be applied to the pipes of equipment?
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This post was last edited by jmdc on 2018-1-3 21:20. How should insulation be applied to equipment pipes? How to determine which equipment and pipelines in the entire plant need insulation, how thick the insulation should be, what type of insulation material to use, and what the insulation structure should be? If insulation is required, we didn’t provide it – what if it freezes? We could have skipped the insulation, but then we were worried that people might gossip behind our backs, saying that we’re trying to steal business from the external insulation contractors. There are risks in either case. Is there a quantitative formula that can be used to determine which equipment and pipelines need insulation? That would make it easier to convince others. For example, suppose we have a DN50 pipeline that’s 300 meters long and contains tap water; it’s located outdoors at -8°C. Is insulation necessary in this case? Those external insulation contractors don’t know anything either; they just work randomly, relying on their instincts. They do the insulation work as if it’s something amazing, and we still have to plead with them to do it. What kind of world is this? It drives me crazy
According to GB/T 8175-2008 \"Guidelines for the Thermal Insulation Design of Equipment and Piping\", Article 3.1.1 states that thermal insulation is required in any of the following situations: 1. When the external surface temperature is greater than 323 K (50°C) [the surface temperature at an ambient temperature of 298 K (25°C)], or for equipment and piping for which it is required that the external surface temperature be less than or equal to 323 K (50°C)； 2. Equipment and pipelines whose medium’s freezing point is higher than the ambient temperature. For water pipes, the freezing point of water is 0°C; therefore, insulation is necessary in your case ； The insulation thickness of industrial pipelines, construction specifications, etc., are subject to relevant calculations and regulations in GB50264-2013 \"Design Code for Insulation of Industrial Equipment and Pipelines\". You see, that’s why the construction team doesn’t dare to cheat you; if you don’t understand, it’s normal for them to act aloof.
A separate post was made to share these two standards. Download of insulation-related standards
What kind of insulation to use and how thick it should be are still determined by the manufacturing process, right?
You can go to your purchasing department to obtain the Technical Agreement, contract, or plan – these documents should specify the material used for insulation, its thickness, and the material of the protective layer. If construction is carried out according to the plan, then the plan will indicate what needs to be done first and what later; otherwise, approval for work to begin won’t be given
It’s listed on the table of pipeline anti-corrosion and insulation materials provided by the design institute
It can be calculated according to the insulation specifications for pipeline equipment.
Are there any performance tables for commonly used insulating materials? The types listed in those standards are too few – polyethylene and rubber foam are not included. What is the difference between glass wool and rock wool, and how can it be determined?
Is it determined by the process or by the equipment?