socket weld pipe wall thickness
socket weld pipe wall thickness
(OP)
I am aware that there is a matching pipe wall thickness for a given class of socket weld fitting (Sch80/XS pipe goes with a 3000# class socket weld fitting for example) My question is if that is a requirement in B31.3. In other words am I allowed to use, say Sch 160 pipe in a 3000# fitting? Or do I need to use a 6000# fitting if I use Sch160 pipe according to the B31.3 code?? I suppose this concept could apply to threaded fittings as well but I am more concerned with s.w. at present. Please help me out if you can.





RE: socket weld pipe wall thickness
Example: Some Owner/Clients will specify that the first nipple off a header pipe for a vent, drain or pressure instrument shall be Sch 160 wall. This is to reduce the possibility of breakage caused by vibration indused metal fatigue.
This might also be done when maintence is in a pinch to get a system back on-stream and the Sch 160 pipe was/is all that is available at the time.
You need to be aware that the thicker wall will cause a "step" on the inside of the pipe thus creating a more turbulent flow.
Remember:
1. There is a rule for everything.
2. For every rule there will be an exception.
RE: socket weld pipe wall thickness
RE: socket weld pipe wall thickness
Try ANSI B16.11
The methodology for matching the socket fitting clasification and the pipe schedule is contained within.
Generally speaking, for schedule 40 systems go with 3000lb fittings, schedule 80-6000lb fittings......when you get higher pressure systems, special rules apply.
This is, of course, the reason that piping engineers issue piping "class or line specifications"....which many owners immediately throw away.
-My opinion only
-MJC
RE: socket weld pipe wall thickness
RE: socket weld pipe wall thickness
Try this web site I think the table will answer most of your questions.
http://
RE: socket weld pipe wall thickness
NozzleTwister
Houston, Texas
RE: socket weld pipe wall thickness
RE: socket weld pipe wall thickness
They do provide a table, a simple one that covers all of the above, that couples the pipe bore to the fitting class.
Just like flange classes, corrosion allowance is taken care of by matching the flange bore to the pipe bore.
That's my opinion anyway....
NozzleTwister
Houston, Texas
RE: socket weld pipe wall thickness
RE: socket weld pipe wall thickness
Try this website for flange data:
http://www.scsenergy.com/scsdataflgrating.htm
RE: socket weld pipe wall thickness
ASME B31.3, ASME B31.1 and I think most piping codes recognize and list ASME B16.11 in their list of components accepted for pressure design.
These codes are copyrighted and not free. You can order from http:
I found B16.11 has a 2005 edition out now.
Good luck
NozzleTwister
Houston, Texas