New pipe connections added as part of equipment modification

A renovation plan must be prepared by the original design firm or a qualified design firm.

The original design unit or a qualified unit needs to carry out recalculation and then provide their opinions

Two new DN300 ports have been added; you need to confirm the location of these ports as well as the pipeline layout. Because two such large pipelines run along the equipment, the wind load on the equipment is affected.

Is it necessary to prepare a calculation sheet for the entire equipment? Should it still be just a calculation sheet for hole reinforcement? Is there any regulation?

This situation falls under equipment modification; according to the relevant regulations, it is necessary for the original design unit or a qualified entity to develop a plan, and of course, calculations must be carried out for the reinforcement through opening cuts. Since the conditions given for this topic are too vague, it is best to conduct a comprehensive calculation out of caution.

First, the original manufacturer or a qualified modification unit must go to the local market supervision bureau where the equipment is located to submit an application for permission to begin work； Second, the entity carrying out the renovation prepares a renovation plan, which is approved by the original design firm or a design firm with the appropriate qualifications (approval in this case essentially means that the design firm has already conducted the necessary calculations) ； Third, if the renovation plan specifies that a pressure test is required after the renovation, the renovation contractor shall submit an application to the local special equipment supervision and inspection agency for supervision and inspection of the renovation ； If a pressure test is not required, the modification unit need not apply for supervision and inspection; however, it must keep all relevant documentation related to the modification (which generally includes: notification forms, certificates of quality for the materials of the pressure-bearing components and welding materials, welding procedure specifications, copies of welders’ qualifications, welding records, reports on visual and geometric inspections, credentials of the personnel responsible for non-destructive testing, non-destructive testing reports, heat treatment reports (if required during original manufacturing), automatic records of heat treatment processes (if required during original manufacturing), and a certificate of modification quality)