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Pipe Flange joint calulation (Inch Dia) Question
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Posted by: venuscantech

07/05/2007, 08:17:24

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How to calculate the inch dia of a slip on flange welding when it is welded on a pipe.




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Re: Pipe Flange joint calulation (Inch Dia)
Re: Pipe Flange joint calulation (Inch Dia) -- venuscantech Post Reply Top of thread Forum
Posted by: jboggs

07/05/2007, 17:58:30

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I hope someone else understands your question better than I do. Why are you calculating anything? Slip-on flanges are made to fit certain sizes of pipe. If you know the pipe size, you know the flange size.

Or are you calculating the weld size?








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Re: Re: Pipe Flange joint calulation (Inch Dia)
Re: Re: Pipe Flange joint calulation (Inch Dia) -- jboggs Post Reply Top of thread Forum
Posted by: venuscantech

07/14/2007, 09:48:39

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yes. for weld size calcuation in piping job. the slip on flanges require both side welding ie. two joints. Is it calculate as single weld or Two?




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Re: Re: Pipe Flange joint calulation (Inch Dia)
Re: Re: Pipe Flange joint calulation (Inch Dia) -- jboggs Post Reply Top of thread Forum
Posted by: Jop

07/09/2007, 11:00:22

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The common missconseption about slip-on flanges is that they are attached with one weld. This is not true. A Slip-on flange is attached to pipe with two welds. One weld is a 45 degree bevel weld on the outside of the pipe to the hub at the back of the slip-on flange. The second weld is also a 45 degree bevel weld and is on the inside of the flange and attaches the pipe wall to the flange. The 45 degree bevelss shall be equal to the pipe wall thickness. The "set-back" for the weld on the inside of the flange shall be equal to the pipe wall thickness + 1/8 inch.
The diameter inches of total weld would be equal to the outside pipe diameter times Pi times the two welds (Weld D. I. = O.D. x 3.1416 x 2 )







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