Does a Y-type filter in a pressure pipeline require a supervision and inspection certificate?

1. Filters designed and manufactured in accordance with pressure vessel standards shall be managed as pressure vessels. 2. TSG D7006-2020 will come into effect on September 1, 2020. Once this standard is in force, filters that meet the definition of prefabricated pipe sections in factories (with the exception of those produced as pressure vessels) shall be managed as such prefabricated pipe sections. Manufacturers must obtain a manufacturing license in accordance with the requirements of TSG 07-2019, and the products shall undergo manufacturing supervision and inspection in line with the requirements of TSG D7006-2020. 3. Personal understanding: A standalone filter does not belong to the prefabricated pipe sections manufactured in the factory, and therefore no inspection is required. However, if other pipe sections are welded to the filter before it is shipped out, inspection becomes necessary.

Has it been designed? The manufacturing plant can start production directly once it obtains the qualifications for manufacturing pressure pipelines.

There are no specialized tests required; what is necessary is that the quality be satisfactory. Regular inspections are needed for pressure gauges and safety valves

Pipe filters are formed by welding pipe sections and flanges together, and they should meet the requirements specified in Note 1-2 of TSG D7006-2020; they represent prefabricated pipe sections manufactured in a factory, and I believe supervision and inspection are necessary.

This post was last edited by netsun on 2024-12-17 at 15:18. According to the **General Administration for Market Regulation’s Announcement No. 41 [2021] on Matters Related to Administrative Licenses for Special Equipment**, the list of entities authorized to produce special equipment has been further clarified. For pressure pipeline components manufactured within factories (which are not subject to container regulations), items such as filters, separators, dip pipes, manifolds, dirt removers, mixers, and buffers require supervision inspections or type tests during manufacturing. Specifically: 1. Component assembly devices: These refer to devices that are formed by combining pressure pipeline components such as pipes, pipe fittings, valves, flanges, compensators, and sealing elements (through welding, flange connections, etc.) to achieve certain functions. They include wellhead devices and production trees, throttle and kill manifolds, gas pressure regulation devices, temperature and pressure reduction devices, flame arresters, flow meters (housings), and prefabricated pipe sections manufactured in factories. 2. Factory-prepared pipe sections refer to pipe component products that are welded and assembled into a complete unit by manufacturers in factories based on the construction design drawings, before being shipped out; these include components such as manifolds, filters, separators, condensate (gas) tanks, dirt removers, mixers, buffers, ball receiving and sending cylinders, and dip pipes (components that are not subject to pressure vessel regulations), but do not include pipe preparation carried out at the construction site. 3. Component assembly devices that require a manufacturing license: gas pressure regulating devices, temperature and pressure reducing devices, flow meters (housings), as well as prefabricated pipe sections used in pipelines within boilers and in long-distance oil and gas pipelines. 4. Component assembly devices that do not require a manufacturing license still need to undergo manufacturing supervision inspections or type tests. 5. That is to say, except for the component assembly devices that require a manufacturing license as mentioned in item 3 above, no manufacturing license is needed; only supervision and inspection or type testing are required. 6. The specific implementation of TSG D7006-2020 shall be in accordance with the \"List of Licenses for Special Equipment Production Units\" specified in General Administration Document [2021] No. 41; in other words, the supervision and inspection of pressure pipelines should be based on the contents of the latest list.