Is it necessary to obtain the opinion of the original design unit when installing an operating platform on a pressure vessel in use?
Thread Content
Is it necessary to seek the opinion of the original design and manufacturing party when adding ladder platforms to pressure vessels that have been in use for several years and lack pre-welded gussets?
One can refer to Section 5.2 on modification and major repairs in TSG 21-2016 \"Safety Technical Inspection Regulations for Fixed Pressure Vessels\"; it seems that no approval from the original design unit is required to add a ladder platform. Of course, it would be best not to add a backing plate on top of the container; an elevated platform would be preferable.
I’ve looked at this too; after all, gussets need to be welded onto the equipment. If they’re not fixed to the equipment itself, then logically it falls under structural work. I’ll ask the experienced teachers again when they arrive tomorrow.
Should gussets be welded to components such as the pressurized cylinder of the equipment? What type of device is it? Is there a tendency for hot cracking? Find out whether heat treatment is required before welding the gusset plate. What certificate does a welder need? Figure it out first before deciding what to do
Logically, the original design firm should be consulted to assess the strength, as adding platform stairs to the equipment increases the maintenance load, a load that was not taken into account in the original strength design. The original designer should also provide information on whether rooting is allowed on the equipment, as well as some requirements regarding the welding gussets.
Heat treatment equipment cannot be added; for non-heat treatment equipment, it can be added provided that the vertical and eccentric loads are not too high. Otherwise, it needs to be calculated.
It’s a horizontal vessel with a pressure of 0.4 MPa, and no heat treatment requirements are needed. My supervisor also said that there’s no need to consult the original design team; I can carry out the calculations myself. Thank you all for your advice: handshake.
Renovation requires consulting the original design and manufacturing party, and it may involve heat treatment and issues related to local stress.
The ladder platform used for normal operation testing does not require consideration of local stress issues, as it will definitely pass
Go in quietly; no shooting.
Adding ladder platforms poses no significant structural stress issues; a simple assessment is sufficient. The key is to evaluate the container’s material, heat treatment, medium, etc., to determine whether welding of gaskets is permissible.