who knows pipe threads ??? 2BSP 4BSP etc

steptoe · Post by **steptoe** » Sat Dec 22, 2007 11:48 am

I am looking up Blackwoods website on gas pipe fittings and strike a new term/size it is 2BSP , 4BSP and 8 BSP.

Can anyone explain the difference between the 2 , 4 and 8

http://www2.blackwoods.com.au/infoBANKP ... &P=2024660

ta,

steptoe · Post by **steptoe** » Sat Dec 22, 2007 11:50 am

WAKE UP !! IT IS half, quarter and one eighth, doof !!

subanator · Post by **subanator** » Sat Dec 22, 2007 10:07 pm

Ere, dis might elp mate ol blighty:
http://en.wikipedia.org/wiki/British_st ... ipe_thread

Ben · Post by **Ben** » Sat Dec 22, 2007 11:54 pm

steptoe wrote:WAKE UP !! IT IS half, quarter and one eighth, doof !!

Hehe

When you ring Blackwoods make sure you are sitting down too...

steptoe · Post by **steptoe** » Sun Dec 23, 2007 11:33 am

Ahh, subanator, why couldn't i find that ?

Just when I thought I finally undestand this sizing secret it bites me. The main suppliers gone on holidays for a few weeks and my supersized stuff arrives in the post !

how close is 1/8 NPT to 1/8 BSPT? so close it ain't funny !

I think price is why I have forgoten about Blackwoods for past seventeen years !!

Ben · Post by **Ben** » Sun Dec 23, 2007 4:39 pm

steptoe wrote:
how close is 1/8 NPT to 1/8 BSPT? so close it ain't funny !

Same thread, only npt is tapered.

tim_81coupe · Post by **tim_81coupe** » Mon Dec 24, 2007 12:36 pm

BSPT is tapered too.

BSP isn't.

My understanding was that below 1/2" NPT and BSP are the same thread (ie they have the same thread count).

I could be wrong on that though.

Ben · Post by **Ben** » Mon Dec 24, 2007 11:36 pm

Der, of course, I was reading BSPT as "British Standard Pipe Thread" not "British Standard Pipe Taper (Thread)"

BSP is 55 degree thread angle, NPT is 60 degree (ie the angle of the little V grooves. Also BS is rounded in the V's and NP is flattened.

steptoe · Post by **steptoe** » Tue Dec 25, 2007 10:20 am

for the sanity of future generations we are gonna have to metricate everything..oneday

PeeJay · Post by **PeeJay** » Tue Dec 25, 2007 4:28 pm

Whoever invented the imperial system should be shot!!

steptoe · Post by **steptoe** » Wed Dec 26, 2007 10:15 am

some of the imperial is sorta OK, but whitworth !! JFC !!!