What type of natural gas DN800 flange is used?
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Medium natural gas, design pressure 0.7MPa, design temperature 50℃ DN800 equipment flange type of equipment? NB/T47021 or 47023? Why?
This post was last edited by kareale88 on 2018-12-25 13:50 1. When it is explosive and non-toxic (except for those with high permeability), it is recommended to choose NB/T47021 or NB/T47022. 2. When it is explosive and low-toxic (except for those with high permeability), it is recommended to choose NB/T47022. 3. When it is explosive and toxic (except for those with high permeability), it is recommended to choose NB/T47023 4. For poisoning or above, it is recommended to choose NB/T47023. Generally, it is too wasteful to use plates for large-diameter flanges like this. If you consider forgings, considering the comprehensive cost and safety, it is recommended to choose NB/T47022 or NB/T47023.
Can lined flanges be used in this explosive medium?
What material should be used for lining? Natural gas is not used in many clean places. Ordinary carbon steel materials can meet the requirements.
S30408+16MnⅡ
In terms of design, take a look at my 6# building file: Please refer to the link below when calculating: "Pressure Vessel Engineer's Design Guide" This book has been tagged for download, "Pressure Vessel Engineer's Design Guide" https://bbs.hcbbs.com/thread-2056681-1-1.html (Source: Haichuan Chemical Forum Network)
I agree with the 2nd floor, natural gas is not a special medium, just ordinary materials.
Does natural gas contain H2S?
Make the user specifically request this material
There is indeed a contradiction in the design on this point. Under normal circumstances, customers cannot provide the content of hydrogen sulfide. Coupled with the fierce competition in the market, we have considered lowering the requirements.