Welding Different Types of Neck Flanges - CR4 Discussion Thread

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Naif Associate Join Date: Jan 2009 Location: Saudi Arabia Posts: 39	Welding Different Types of Neck Flanges 01/27/2009 5:13 PM
	Hi My question is simple but not easy.I need help from you guys. I want to joint 2 types of welding neck flange RF with FF, I know code B31.3 it's not permitted. Even if it doesn't fall under a code requirement. even in case someone suggest to remove the rasid face also I can't do it becuase of operation (fluid is flammble). Material is ASTM 105 ASME B16.5 with size 3" 2 solution I got from my friends 1- use adapter ring. 2- make a 1/16" thk steel ring plate equal to the height of the raised face and to cover the area outside the bolt hole on the raised flange. So, it makes like a flat face flange. but really I am confused. Any other Ideas please.
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	Pathfinder Tags: WNF RF and WNF FF

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sb Guru Join Date: Mar 2007 Posts: 2550 Good Answers: 103	#1 Re: Join 2 types of flanges RF with FF 01/27/2009 8:57 PM
	Technically I don't know why a metallic gasket won't work without the modifications. Most of the flanges we use (of course in hydraulic lines) and RF type, whereas the LP pumps outlets/inlets are more often than not with flat face. In these applications we use normal spiral wound gaskets. Pressure is of course low (<20 bar). However no technical difficulty has been found. Why don't you take advice from any gasket manufacturer ? Again since you are working with a hazardous fluid hence my experience with hydraulic oil may not matter much. Why in the first place the pipeline was made like this ? What has the OEM recommended ? __________________ Fantastic ideas for a Fantastic World, I make the illogical logical.They put me in cars,they put me in yer tv.They put me in stereos and those little radios you stick in your ears.They even put me in watches, they have teeny gremlins for your watches
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XMech Power-User Join Date: Jan 2009 Location: Western Canada Posts: 295 Good Answers: 51	#2 Re: Join 2 types of flanges RF with FF 01/27/2009 11:50 PM
	Can you confirm the material of the Flat Face flange? Because if it is a ductile material you don't really have an issue. __________________ A little knowledge is a dangerous thing.
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gdevine Power-User Join Date: Mar 2008 Location: Globaly - very close to the southern most point of Canada Posts: 445 Good Answers: 12	#3 Re: Welding Different Types of Neck Flanges 01/29/2009 8:35 AM
	Typically, if I dig deep enough into the related specifications, I can qualify a joint or flange the same way that the standard (catalog part) flanges have been qualified. Read into some of the specifications listed in the ASME spec. __________________ -why bother doing it wrong when it will be anyway.......
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Users who posted comments:

gdevine (1); sb (1); XMech (1)

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