The issue of classifying large-diameter heat exchangers based on the extreme toxicity of liquid-phase materials
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For large-diameter heat exchangers with liquid-phase materials only (no gas phase), and whose toxicity is extremely high, operating at a pressure of 1.35 MPa and at temperatures below their standard boiling point, they should not be classified according to TSG21; in other words, they are not considered pressure vessels. Just handle it like that?
It doesn’t fall into any category; it simply refuses to undergo supervision and inspection, but its production still follows the standards of 151 and 150
There’s no problem with this; it’s just that not classifying it as a pressure vessel can lead to many safety hazards, such as casualties in the event of a minor leak. Furthermore, according to TSG21, heat exchangers involving liquid-liquid (below standard boiling point) exchange are not classified. Reaching this conclusion is questionable
This post was last edited by wanlirn on 2023-1-28 at 10:18. What do you mean by “not managing it as a pressure vessel”? What do you people do with the equipment that isn’t under supervision in your unit? If you’re really worried, you can entrust an independent inspection agency to carry out third-party supervision during manufacturing.
That’s not what I mean. If it’s not a pressure vessel, then it naturally isn’t regulated as such; it’s just an ordinary device, and therefore isn’t subject to the relevant supervision regulations. I’m not talking about design and manufacturing issues. Design and manufacturing can raise requirements, but management will not be increased without a basis, and that basis is whether it is a pressure vessel.
This post was last edited by wanlirn on 2023-2-1 09:44. This device is a pressure vessel, but it does not fall under the category of pressure vessels that require supervision and inspection. You just need to follow GB150 standards in its manufacture. I don’t understand the management approach used in your company; in our company, devices that fall within the scope of GB150 are managed in accordance with those standards. GB150 explicitly requires the presence of quality management system requirements; therefore, your organization’s Quality Assurance Manual is also applicable to this type of equipment. I’m not sure what’s bothering you
What I’m referring to is the operational management of pressure vessels throughout their entire service life; it falls under the pressure vessel management regulations specified in TEG21, and if it doesn’t fall under those regulations, then it isn’t managed in accordance with them. Please note that TSG21 is not only about managing design and manufacturing; a large portion of it focuses on usage management. Thank you!
For this circle you’re drawing, just say it’s the using unit and that’s it. . . The vast majority of entries in this section are manufacturing plants