Urgent! Urgent! Urgent! The pressure vessel equipment is ready; can we add a manhole as well?
Thread Content
The pressure vessel equipment is ready; can we add a manhole as well? Please everyone help. Thank you, thank you.
This pressure vessel is a storage tank that holds corrosive materials. Please help quickly. Thank you.
Holes can be made, but the hydraulic and airtightness tests need to be redone, and the blueprints must be modified; otherwise, the technical supervision agency will not issue a certificate
Of course it’s possible. Containers are made after all. But as mentioned above, the main issue is related to obtaining the necessary certifications. If changes need to be made, it’s best to consult the manufacturer and have them make the adjustments; the design team can then modify the drawings. It’s not allowed to make holes on your own, unless you have the necessary manufacturing qualifications. . PS: If one has the qualifications, they surely wouldn’t ask such a question, haha
I’m not aware of the specific condition of your container. However, when ordinary pressure vessels encounter such situations, the original designer needs to modify the drawings and issue a design notice. If the changes are significant, it is advisable to redo the equipment calculation for safety. It’s almost like designing a new device. The equipment manufacturer then processes the revised drawings and conducts strength and airtightness tests.
It can be constructed, but first a strength calculation must be carried out, the necessary changes must be processed, and various inspections must be done again in accordance with the design specifications.
Sure. Specifically as follows: 1. From the design drawings, or the design request form. II. Hire a qualified construction contractor to carry out the work. III. After the construction is completed, flaw detection shall be carried out in accordance with the design requirements, and the equipment shall be pressure-tested as specified in the original design. IV. Since the tank contains materials that are prone to corrosion, it must be cleaned before construction.
The situation of LZ falls under the category of major modifications to pressure vessels, and it should be handled in strict accordance with Article 124 of the Pressure Vessel Regulations. Excerpt from Article 124 of the Regulations on Pressure Vessels (partial content): “Units engaged in the repair and technical modification of pressure vessels must be those that have obtained the corresponding manufacturing qualifications, or units that have been approved after review by provincial safety supervision agencies.” Plans for major repairs or modifications to pressure vessels must be approved by the original design agency or a design agency with the appropriate qualifications, and they must also be reviewed and recorded by the local or municipal safety supervision authorities where the work will be carried out. The repair or modification unit shall provide the user unit with technical documents such as the drawings after repair or modification, and certificates of construction quality. ” For reference! This post was last edited by clguan on 2009-4-17 23:53]
The best approach is to contact the original manufacturer of the device and ask them to make the modifications.
Storage tanks definitely have manholes; then why add additional handholes? What are handholes used for? It is indeed rather troublesome to make holes in the container after it has left the factory; even if there’s no need to calculate its strength, there will definitely be no problems. Personal opinion: If it’s possible to avoid it, do so; if not, find a way to take control of the situation.
The pressure vessel has been completed, and no further openings should be made without permission. The diameter of such openings is usually around DN300; creating such openings can affect the strength of the pressure vessel. Whether it is possible to make such openings must be determined by the original design team, who will also decide whether any reinforcement measures are needed. Additionally, the creation of such openings must be carried out by a qualified pressure vessel manufacturing company.
The enforcement is strict now; it’s best to ask the manufacturer to make the changes, as doing it oneself is too troublesome
Holes can be made; not only must a gas-tightness test be conducted, but documentation is also required.
This post was last edited by Gao Tianyi on 2009-6-8 at 12:43. It cannot be manufactured on one’s own; otherwise, it won’t pass the inspection at the testing facility. The design drawings must be modified, and it has to be processed by a qualified company
Holes can be made, but re-verification, hydrostatic testing, and airtightness inspection are required
It is possible to make the cut, but before doing so, a corresponding calculation report must be prepared and the original drawings modified. After the cut is made, appropriate testing and inspections must be carried out according to the drawings, and it is also necessary to go through the relevant procedures at the boiler inspection agency.
When making holes in a container, the following points should be taken into account: 1. Making holes in a container essentially means altering its original structure; therefore, written approval from the party that designed the container is necessary. The design team will provide a response after conducting the necessary calculations. 2. If the strength obtained after calculation does not meet the requirements of the production process, it certainly cannot be modified. Holes in pressure vessels must comply with this rule: after repair or modification, the structure and strength of such vessels must meet the requirements for safe use. 3. Any re-drilling of holes in the container must be carried out by units and workers with the appropriate construction qualifications. The tools and materials used in construction must meet the requirements of the original container, such as welding materials and reinforcement plates. 4. Before starting the construction, it is necessary to inform the Quality Supervision Bureau, and the work must be carried out under the supervision of their officials throughout the process; they will ask you to provide all the necessary documents. After the construction is completed and procedures such as flaw detection and strength testing are carried out, quality inspection personnel will issue a report on the construction quality. The renovation is only complete then. 5. Finally, a pressure vessel usage certificate must be obtained before it can be put into use.
This post was last edited by Gao Tianyi on 2009-6-8 at 12:44. First, you need to go to the Quality Supervision Bureau to obtain approval; only after they give their consent can you start making the holes. Then the holes should be made under the supervision of the Quality Supervision Bureau. Do you understand? This is a pressure vessel; it must be done this way
Sure, it can be modified in accordance with the relevant regulations, but it’s necessary to file the changes with the boiler inspection agency