Are there any requirements for pipelines used to transport hydrogen?
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I would like to ask whether pipelines for transporting hydrogen need to be specially manufactured? Why? Are there any specific requirements? Especially for hydrogen production and hydrogenation plants, could some expert give some guidance or provide a link for learning?
How high is the pressure? Hydrogen is a flammable and explosive substance; therefore, it must be installed in accordance with the requirements for pipelines carrying such substances. However, according to the regulations, there are no other special requirements.
The pressure for hydrogen production is generally 20 kilograms, while the pressure for hydrogen addition is around 80 kilograms
Hydrogen is a flammable and explosive medium; the pipes must be degreased and thoroughly purged. Additionally, static bonding is also required at the flange connections. After the piping is installed, flaw detection must be carried out!
Can ordinary carbon steel pipes be used?
In most cases, ordinary carbon steel is sufficient; however, hydrogen embrittlement can occur under high-temperature conditions, and it is necessary to refer to Nelson curves to determine the appropriate material
One more question: ordinary carbon steel can also be used for valves and fittings
You can refer to the \"Design Code for Hydrogen Stations\" GB50177-2005; this code can be found on forums.
Here is the response to your question: 1. There are no special requirements regarding the material of the pipes; as long as it is a metal material, the wall thickness only needs to meet the pressure requirements. 2. The pressure ratings of the valves, flanges, gaskets, and bolts need to meet the requirements. 3. All pipelines must undergo 100% flaw detection during construction to prevent weld defects. 4. After the construction is completed, in addition to performing a pressure test with water flushing, a airtightness test must also be carried out. 5. All pipeline equipment must be installed for static grounding in accordance with the design specifications for static grounding in petrochemical industries. Personal experience is for reference only. Please point out any shortcomings. :)
Pipes should be installed away from flammable and explosive materials, high-pressure pipelines, as well as electrical and instrumentation trays (with specified spacing requirements); they should also not be placed below such pipelines and trays, and it is best to install them along the edges or at the top.
Can pipes made of 304 stainless steel be used?