Pressure vessels – jackets and sealing rings
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Recently, I am working on a 4m3 extraction tank with a jacket pressure of 0.35 MPa; the inner cylinder operates at atmospheric pressure. Both the inner cylinder and the jacket are made of S30408 material. The jacket is welded to the cylinder in a sealed configuration. ..Why is it required to meet PT-I grade standards in the blueprint? This equipment doesn’t have a mixer, nor is it made of different types of steel. Please, experts, explain why this requirement exists and which standard it comes from (I checked GB150 and couldn’t find such a requirement there)!
The standard represents the minimum requirement; designers are free to raise the testing requirements.
Complies with item 9 of clause 3.2.10.2.2.4 of the Solid Content Regulations.
The designer believes it is necessary..........
The provisions of 5.0.6 in HG/T20569-2013.