Can the as-built drawings issued by the construction unit for on-site changes to pressure pipelines substitute for design changes made by the design unit?
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For example, if the on-site installation conditions are limited and it is not possible to carry out construction according to the designed layout, and the construction party changes the pipeline route with the owner’s approval without applying to the design agency for a change, but instead uses as-built drawings, can it still pass the pressure pipeline inspection and acceptance by the special inspection agency?
In accordance with Article 29 of the “Safety Technical Supervision Regulations for Pressure Piping”, any modifications to pressure piping must be requested and reviewed in accordance with the design documents. Therefore, the construction unit cannot bypass the design unit to directly make changes to the pipeline routing and have them accepted in the form of as-built drawings. If a change is indeed necessary due to on-site conditions, the construction contractor must first submit a change request to the design unit; construction may proceed only after the request has been reviewed and approved. After construction is completed, the revised design drawings should be submitted to the design unit in a timely manner for review, so as to confirm that they meet the requirements. When conducting inspections and acceptance tests on pressure pipelines by the Special Inspection Agency, such tests are carried out in strict accordance with laws, regulations, and relevant standards. Should any changes that have not been reviewed by the design unit be detected, they will be deemed a violation of regulations, resulting in failure to pass the acceptance inspection. Therefore, it is recommended that construction contractors comply with regulations and engage in reasonable communication and consultation with the design unit to ensure the legality and safety of the construction. .
Conceptual confusion! 1. Design change orders and as-built drawings serve completely different purposes and should not be confused ； 2. The basis for the inspection and acceptance of pressure pipelines by the Special Inspection Institute is the construction drawings provided by the design institute (including design changes), rather than the as-built drawings ； 3. “Due to limited on-site installation conditions, it was impossible to construct according to the designed route; therefore, with the owner’s consent, the construction contractor altered the pipeline route.” In such cases, a reverse visa procedure can be adopted, with the design institute confirming the changes.
If the construction contractor lacks the necessary design qualifications, it definitely won’t be permissible. The contractor can produce as-built drawings, but has no authority to make any design changes