Design and manufacturing qualifications for pressure vessels not classified into categories
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Do pressure vessels that are not classified still require a license for their design and manufacture? For example, a heat exchanger with a diameter of 1100 and a length of over 6000, operating at a pressure of 0.8 MPa, using circulating water as the medium and at a working temperature of 80°C – it does not fall into any specific category. Is it still necessary to have a license for the design and manufacture of pressure vessels in order to design and construct such equipment?
:Q First, one needs to find the basis for not categorizing it. . . .
Try to answer it for the original poster’s reference. 1. Design license: Required. In accordance with TSG R1001, namely the requirements of Annex A (P3) of the \"Rules for Licensing the Design of Pressure Vessels and Pressure Pipelines\", for pressure vessels that are not subject to regulation, their design agencies must hold a license at least at level A, C, or D for pressure vessels. 2. Manufacturing license: Required. In accordance with the requirements of the Supervision and Management Measures, pressure vessels must obtain certification, regardless of whether they are classified or not.
Pressure vessels that are not classified do not require a license for pressure vessel design and manufacturing.
Pressure vessels that are not classified do not require supervision by a pressure vessel inspection agency; it is up to the owner to decide whether a license for the design and manufacture of such pressure vessels is needed, and no one else will interfere in this matter.
This post was last edited by Yongfu on 2016-1-20 at 20:55; it seems that neither a design license nor a manufacturing license is required. However, the owner can put forward corresponding requirements based on the standards, and designers can use these standards to carry out the design; they can specify requirements regarding materials, manufacturing, inspection, and acceptance in the drawings. No qualifications are required, but according to the standards, requirements must be specified on the drawings, and construction should be carried out in accordance with those drawings.
To determine that no gas phase space exists under any operating conditions and thus avoid classification, it is necessary; otherwise, the PV product must be calculated based on the gas phase space, and classification shall be carried out in accordance with the relevant regulations.
With a working pressure of 0.8 MPa and such a large volume, shouldn’t it be classified as a Class 1 pressure vessel according to the regulations on fixed-volume vessels?
Thank you for the reminder; I’ve considered it, and this device indeed shouldn’t be classified. Please focus on answering the questions regarding the design and manufacturing qualifications of this equipment, rather than getting stuck on whether it falls under a certain category or not!
Deciding whether to classify or not depends not just on P, V, or PV! ! !
This post was last edited by Yongfu on 2016-1-22 09:12. When the medium is a liquid operating below its boiling point, V refers to the volume of the gas phase space rather than the volume of the device.