Is it necessary to stamp the pressure vessel seal when issuing drawings changes?
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When designing pressure vessels, generally speaking, we only stamp the pressure vessel certification mark on the assembly drawings, while no marks are applied to the other part drawings. So, for the related changes to pressure vessels, is it necessary to stamp them as well? What is everyone’s usual approach? Are there any relevant regulations? We usually don’t cover it, but since the user requested it, let’s discuss it.
Yes, of course it is necessary. This is why pressure vessel design requires qualified professionals
Of course it is necessary; not just any change order will be valid. A change order must include design details, signatures from reviewers, and además, it must bear the seal indicating qualification for pressure vessel design
I agree to the change in sealing to ensure the rigor of the system.
In my opinion, whether a stamp is required for design changes should depend on the specific circumstances of the change. If only the position or quantity of the pipe openings on the drawings changes, then no seal is required; merely the signatures of the design, review, and approval personnel are sufficient ； A signature and seal shall be provided for any fundamental changes in the materials and structure of the main load-bearing components.
It must be sealed, and a signature is also required. And specify in detail the design drawing number, change number, and content of the change.
Of course it needs to be stamped; the Quality and Technical Supervision Bureau is responsible for oversight.
If it is to be covered, inspection by the equipment manufacturer as well as completion acceptance are both required!
Why is it necessary to stamp it? The Code for Pressure Vessels and GB150 only stipulate that the design qualification seal must be affixed to the general design drawing of the vessel.
Stamping is required; for any subsequent changes, we still need design work, verification, and approval signatures
Everyone upstairs shared their opinions; I would like to express my gratitude now. Is there any practical basis for what several classmates said about the necessity of putting a seal on it? What Classmate Hai Feng said – that not having a stamp makes something invalid – does he mean the qualification stamp of the design institute, or the institute’s official stamp, or perhaps the stamp specific to pressure vessel design? Can’t it be signed by three parties?
We require the technician to sign, the design manager to issue it, and to stamp it with the change approval seal.
Personally, I think it’s not necessary to use the qualification stamp of the design firm; the stamp of the design firm along with the signatures of the designers, reviewers, and approvers is sufficient.
We are responsible for design, verification, and review, with three levels of signature approval, and we affix the company’s seal for changes; however, we do not apply the seal indicating qualification for pressure vessel design. Because typical changes mainly involve altering the positioning dimensions of the pipe fittings or the dimensions of small components, without affecting the dimensions of the main pressure-bearing parts.
It must definitely be stamped; otherwise how can it take effect? :lol
We have always required only signatures from all three parties.
The relevant standards do not require a seal to be applied whenever there is a design change; it mainly depends on what the provisions in your organization’s quality assurance system documents state. If it is specified in the procedural documents, then a seal is necessary; otherwise, it isn’t required!
A change order requires the qualification stamp of the drawing design agency, right?
I think it’s not necessary to stamp it; a design change notice requires signatures at three levels – from the designer, the reviewer, and the approver. The design drawings are modified by the designers based on the design change notice, and the as-built drawings also need to have signatures from the designers and reviewers confirming the design changes. As-built drawings must be stamped with the design qualification seal, so it’s not necessary to use such a seal for design changes.