Manhole size per Asme VIII
Manhole size per Asme VIII
(OP)
Hi guys,
I`m designing a atmospheric/low pressure horizontal tank with opening for manhole of 600mm and i use 24" Flange for the manhole flange and blind cover. The thing is, client and fabrication team asking to reduce the thickness and number of bolts of the flange. The reason is because the thickness cause the blind flange be too heavy for the system and operating people. Any opinion is most welcome. Thanks in advanced
I`m designing a atmospheric/low pressure horizontal tank with opening for manhole of 600mm and i use 24" Flange for the manhole flange and blind cover. The thing is, client and fabrication team asking to reduce the thickness and number of bolts of the flange. The reason is because the thickness cause the blind flange be too heavy for the system and operating people. Any opinion is most welcome. Thanks in advanced





RE: Manhole size per Asme VIII
OR CLIENT ACCEPTS OTHER CODE OR STANDARD, YOU CAN USE 'JIS CODE' ( <--- JAPANESE CODE.)
IN ASME, MIN. FLANGE RATING IS 150 PSIG ( 10.5 KG/CM2G).
BUT, JIS CODE PROVIDES FLANGE RATING BY 5 KG/CM2G.
REGARDS,
MOON.
RE: Manhole size per Asme VIII
Use davit
Regards
r6155
RE: Manhole size per Asme VIII
Regards
r6155
RE: Manhole size per Asme VIII
Note also that hinges / davits / etc are often used on manway covers to avoid having to physically handle them.
Regards,
Mike
The problem with sloppy work is that the supply FAR EXCEEDS the demand
RE: Manhole size per Asme VIII
RE: Manhole size per Asme VIII
RE: Manhole size per Asme VIII
Similar flanges would be used on AWWA, NFPA, and UL atmospheric tanks.
AWWA C207 plate flanges and blind flanges are available, that are lighter than 150# flanges, but heavier than the manway flanges in the tank standards. They generally have the same bolt patterns as the heavier flanges. For vessel use, they would be designed by the vessel code, and may not meet the code when designed that way.
Elliptical in-swing manways are also available.
Various quick-opening manways are commercially available, but won't necessarily meet the tank standards above.