full encirclement pad as a hot tap fitting

[mehdipoor]

hi everybody!
can any one help me?i want to know how can i do calculations for designing a suitable full encirclement pad for a hot tap case?which codes must be followed? can any one give me usefull data about hot tap fittings designing?

 

[11echo]

Save yourself a head ache and get a "split tee". These guys invented "hot tapping"!

http://www.tdwilliamson.com/en/Products/Fittings/Pages/Home.aspx