Regarding pressure vessels
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Hai Youhao: I have a question to ask. Our company has a 5m3 stainless steel storage tank that operates at normal pressure on a regular basis. After operating for a certain period of time, compressed air at a pressure of 0.5 MPa is required to pump the liquid inside the device into other tanks (this process takes only a short time, usually around 10 minutes). Does this device need to be designed as a pressure vessel and require a corresponding certification to be used? Thank you.
It is required; it has nothing to do with working hours. In accordance with the TSG_R0004-2009 Regulations on Safety Supervision of Fixed Pressure Vessels, all three requirements for fixed pressure vessels are satisfied. Therefore, it should be defined as a pressure vessel.
It has now been updated to TSG_21-2016
Consider things from a safety perspective!
Thank you for the reminder; the version has indeed been updated to TSG_21-2016
According to the design specifications, simple pressure vessels do not require registration; however, if they are designed as first-class pressure vessels, registration and inspection are necessary
Refer to Clause 1.5(3) of TSG21-2016; you need to confirm whether your equipment complies with this requirement, and if it does, no registration for use or periodic inspection is necessary. How often is it for you, in terms of time intervals?
It meets the criteria – this device falls into Category 1. According to Article 1.5 of TSG 21-2016, point 3 of the conditions under which such devices are not required to comply states that \"vessels with a normal operating pressure of less than 0.1 MPa (including those connected to the atmosphere and that need to withstand a pressure of 0.1 MPa or more momentarily during feeding or discharging processes)\"; however, 10 minutes cannot be considered a momentary period in your case! So it has to be considered that, for safety reasons, it’s necessary to do so
It turns out it was designed as a pressure vessel at normal pressure. Now, changing the operating pressure and using a different operating medium constitutes a modification, and approval from the original design party is required. According to pressure, medium, volume. It can already be considered a pressure vessel. However, initially, its manufacturing, inspection, acceptance, use, and daily maintenance were all carried out as if it were a pressure vessel at normal pressure. The original design team will never agree to you doing this. .