Re: [PipingDesign] Reinforcement Pad

>1. Is there a max temperature limit for the use of reinfocrcing pad (and
>start using a tee)?

Not generally--check the code rules for your construction

>2. Is there any rule-of-thumb to figure out the size of the reinforcing pad
>given just the nominal size of header?

You need to address the area replacement requirements in the Code

>3. What is the max permissible gap between the periphery of the reinf. Pad
>and to the pipe to ehich it is attached.?
This is a weld procedure issue. What are your fit-up requirements? I seem to recollect that 1/16 as a rule of thumb for root gaps but it depends on the weld design and the electrode size.

Christopher Wright P.E.    |"They couldn't hit an elephant from
chrisw@skypoint.com        | this distance"   (last words of Gen.
___________________________| John Sedgwick, Spotsylvania 1864)