GRG manhole
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For the material list of the 2000-liter storage tank, it is indicated that the manhole on the tank wall should be made of GRG-600 with a pressure rating of PN1.0MPA and a diameter of DN600. Which standard should I refer to? Only then can we know its details? By the way, the tank I need to make is for storing heavy oil.
I’m not sure if these standards will be useful to you; go and check them out. Serial Number, Standard Name, Standard Number: 1. Manholes and handholes for carbon steel and low-alloy steel – Types and technical requirements, HG 21514-95; 2. Manholes for normal pressure applications, HG 21515-95; 3. Manholes with rotating covers and butt-welded flanges, HG 21516-95; 4. Manholes with rotating covers and welded flanges with necks, HG 21517-95; 5. Manholes with rotating covers and welded flanges with necks, HG 21518-95; 6. Manholes with vertically hanging covers and butt-welded flanges, HG 21519-95; 7. Manholes with vertically hanging covers and welded flanges with necks, HG 21520-95; 8. Manholes with vertically hanging covers and welded flanges with necks, HG 21521-95; 9. Manholes with horizontally hanging covers and butt-welded flanges, HG 21522-95; 10. Manholes with horizontally hanging covers and welded flanges with necks, HG 21523-95; 11. Manholes with horizontally hanging covers and welded flanges with necks, HG 21524-95; 12. Manholes for normal pressure applications with lever-operated quick-opening mechanisms, HG 21525-95; 13. Manholes with elliptical rotating covers and quick-opening mechanisms, HG 21526-95; 14. Manholes with rotating arch covers and quick-opening mechanisms, HG 21527-95; 15. Handholes for normal pressure applications, HG 21528-95; 16. Handholes with plate-type butt-welded flanges, HG 21529-95; 17. Handholes with welded flanges and necks, HG 21530-95; 18. Handholes with welded flanges and necks, HG 21531-95; 19. Handholes with rotating covers and welded flanges and necks, HG 21532-95; 20. Handholes for normal pressure applications with quick-opening mechanisms, HG 21533-95; 21. Handholes with lever-operated quick-opening mechanisms, HG 21534-95; 22. Handholes with rotating covers and quick-opening mechanisms, HG 21535-95
There is some misinformation upstairs; the HG manhole standards are already based on the 1999 version
The GRG manhole seems to be the standard diagram from some accessory manufacturers