A2 pressure vessel manufacturing scope
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Now, A1 refers to large high-pressure vessels, which are those with an inner diameter of 2 meters or more; A2 denotes other high-pressure vessels, that is, those with an inner diameter of less than 2 meters – all such vessels fall under category A2. It seems that this definition differs from the original scope for what constitutes A2.
Yeah, it’s a transitional period; things are a bit chaotic
Yes, I don’t know when the relevant issues can be resolved.
Haha, I’ve been troubled by this problem ever since
Is there any expert at HaiChuan who can give some guidance?
Well, the factories that were interviewed recently said it’s different from before. Moreover, when considering design alone, there are more requirements for obtaining evidence than before.
After checking online, A1 refers to high-pressure containers as well as those originating from high-pressure vessels, while A2 denotes medium and low-pressure containers in Category 3; I didn’t find any difference in their dimensions
With the development of society and the improvement of manufacturing technologies, the scope of what constitutes an A2 category today is much broader than it used to be. Everyone can follow the official WeChat account \"Pressure Vessel Industry Network\" to read the article titled \"Permit Requirements for Production Units of Pressure Vessels and Pressure Pipelines\".
*Latest classification of pressure vessels by grade: 1. Large high-pressure vessels (A1): High pressure: 10 MPa ≤ P < 100 MPa; Note: High-pressure vessels with an inner diameter of ≥ 2 meters. Coverage: Grades A2 and D. 2. Other high-pressure vessels (A2): High pressure: 10 MPa ≤ P < 100 MPa ； Note: High-pressure vessels with an inner diameter of <2 meters. Coverage: Grade D. 3. Ultra-high pressure vessels (A6): Ultra-high pressure: P≥100MPa. 4. Extra-large pressure vessels and spherical tanks (A3): Medium and low pressure: 0.1MPa≤P＜10MPa. Note: Extra-large pressure vessels refer to those whose large diameter makes it impossible to transport them by road or rail. Units that specialize in the on-site fabrication of extra-large medium and low-pressure aspherical pressure vessels must obtain a pressure vessel manufacturing license corresponding to that level (the license shall specify on-site fabrication of extra-large medium and low-pressure aspherical pressure vessels). Manufacturing units holding an A3-level pressure vessel manufacturing license are qualified to carry out the on-site fabrication of such vessels. 5. Medium and low-pressure vessels (D): Medium and low pressure: 0.1 MPa ≤ P < 10 MPa 6. Non-metallic pressure vessels (A4)