The difference between A1A2
Thread Content
In the standard TSG 07-2019, what are the differences between A1 and A2?
A1 is a large high-pressure vessel, and A2 is other high-pressure vessels
I know that. So what are the differences in terms of pressure and size? Thank you
Large high-pressure vessels refer to high-pressure vessels with an inner diameter of 2 meters or more
Difference between A1 and A2: A1 is a large high-pressure vessel (with an inner diameter of 2000 mm or more), and at present it can only be distinguished by its diameter. 1. The requirements for the personnel in the quality assurance system differ. 2. The number of technical staff required is different. 3. The agencies responsible for processing manufacturing permits vary; A1 requires approval from the national authority, while A2 only requires approval from the provincial authority. 4. The qualifications required for those in charge of non-destructive testing are different. 5. In terms of specific requirements, level A1 has much higher demands than level A2 and C2.2
A1: High voltage above 2 meters; A2: High voltage below 2 meters
A1A2 is likely intended for pressure vessel manufacturing, with no distinction in design.
The design was originally of Class D; now a permit for regulatory compliance is required. What types of design drawings are needed, and are spherical tanks involved as well?
As specified in Table C-1 of License Rule C1.3
A1 should be a high-pressure vessel； A2 is a medium and low pressure vessel of the third category
Now, the third category of low and medium voltage is also classified as a Class D license