Branched reinforcment calculation when using a weldolet
Branched reinforcment calculation when using a weldolet
(OP)
Hi,
Can someone please tell me how to calculate a branched reinforcement when using a weldolet to connect the header to the branch. Secondly how can i determine the thickness of the weldolet to be used in my calculation.
Many Thanks in advance
Fizzy
Can someone please tell me how to calculate a branched reinforcement when using a weldolet to connect the header to the branch. Secondly how can i determine the thickness of the weldolet to be used in my calculation.
Many Thanks in advance
Fizzy





RE: Branched reinforcment calculation when using a weldolet
RE: Branched reinforcment calculation when using a weldolet
I've got a 20" sch 60 header and a 4" sch 80 branch connection; from ur explanation, i take it that a 20"x4"WOL sch 80 will do. Is the header pipe the basis for the weldolet selection?
RE: Branched reinforcment calculation when using a weldolet
"Weldolet, 20NPS S-60 x 4NPS S-80, ASTM A???, MSS SP-97" is an example spec, from memory. The MSS number may be off.
I bet it's the same everywhere, though substitute their brand name for "Weldolet."
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RE: Branched reinforcment calculation when using a weldolet
The reason behind this is that Inegrally reinforced branch outlet fittings have thier design verified through destructive testing. This requires that the pipe fails before the branch and therfore reinforcing areas are not a concern.
For stress at the branch the appropriate figgur in the SIF table in your applicable code should be used.
Just my two cents worth.
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RE: Branched reinforcment calculation when using a weldolet
Do you have a piping line specification for your project ? This document would define branch connection requirements for various line classes.
What is the design pressure, temperature and material of the header pipe ?
Is this work being done to ASME B31.3 ? If so, please consult the chapter and verse of this code for a more complete explantion of weldolet acceptability.
RE: Branched reinforcment calculation when using a weldolet
MJCronin, the design code is B31.4, the design pressure:172.4barg, design temp: 57.4C/-41C, the header and branch material is API 5L X60.
I know weldolets are acceptable but wanted to confirm standard thicknesses and possibly if branch replacement calculations are needed. I'm not a piping lad and dont come along weldolets often.
Cheers.
RE: Branched reinforcment calculation when using a weldolet
Without a Line Spec, you have to do a full set of calc's for all possible combinations, permutations, and corrosion rates *every* time you install a pipe circuit. Try to find a copy of a good, developed set of Line Spec's that will cover carbon steel. 304 and 316 stainless steel, both 150# and 300# flanges That's 6ea. individual Line Spec's, just for a basic set.