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afifahasan
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Pakistan - Member - New Member Engineering Fields - Energy Engineering - New Member

Join Date: Mar 2008
Location: Karachi,Pakistan
Posts: 32

joining G connection to NPT

04/03/2008 1:30 AM

hi to all,

i am facing a problem in joining a 1/2" G (female threads) connection to a tubing with NPT threads. However direct joining is not possible as NPT is a tapered thread while G has parallel threads.

Can anyone suggest the correct method of joining these two types of connections so that there is no leakage???

note that G is similar to BSPP thread.

regards,

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Pathfinder Tags: G threads NPT threads
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henry.wei
Active Contributor

Join Date: Mar 2008
Location: chengdu China
Posts: 13
#1

Re: joining G connection to NPT

04/03/2008 4:26 AM

I suggest you colud machining a switched thread, one side of the 1/2" G (male threads) the other side with the NPT (female threads);

in the process, you need note that design the space and shape, in order to tighten this switched thread when use the Spanner.

finally, you need use the sealant for 1/2" G and NPT thread.

Best regards.
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snygolfgs
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Hobbies - Musician - New Member Engineering Fields - Manufacturing Engineering - New Member

Join Date: Sep 2007
Location: Endless Mountains of NE Pa, USA
Posts: 298
Good Answers: 20
#2

Re: joining G connection to NPT

04/03/2008 10:56 PM

Hi afifahasan

There are adapters available thru the people at this site:

http://www.anver.com/document/vacuum%20components/vacuum%20cups/Fittings/vacuum-fittings-conversions.htm

I'm sure there are many others also.

Or you can have them made if you have access to a machine shop.

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MarkTheHandyman
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Canada - Member - Toronto, Ontario (South Parkdale On The Lakeshore) Engineering Fields - Marine Engineering - Great Lakes School Of Marine Technology (Owen Sound and Port Colbourne) Technical Fields - Architecture - Private Practice 1976-1990 Technical Fields - Education - Toronto Teachers' College 1971 Technical Fields - Marketing/Advertising - Founding Member Hobbies - Hunting - Founding Member Hobbies - Target Shooting - Founding Member

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#4
In reply to #2

Re: joining G connection to NPT

04/06/2008 2:20 AM

Hi snygolfgs!

Bing! (sound of nine-iron hitting nail on head)

GA

Mark
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Fluids guy
Active Contributor

Join Date: Nov 2007
Posts: 23
#3

Re: joining G connection to NPT

04/04/2008 7:46 AM

The adapter required is part # 1/2x1/2F4OHG from Parker. This is a male 1/2" BSPP to 1/2" NPTF.
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