Hot Tap Blind Flange ?
Hot Tap Blind Flange ?
(OP)
Hello,
Does anyone know if B31.3 or B16.5 will allow me to weld onto a blind flange for the purposes of hot tapping. I'd like to weld a 20" weldolet onto a 24" blind flange and then install a 20" valve and hot-tap the 24" blind. Shutting down the process will cost about $1,000,000 so that's out.
Any input would be appreciated.
Does anyone know if B31.3 or B16.5 will allow me to weld onto a blind flange for the purposes of hot tapping. I'd like to weld a 20" weldolet onto a 24" blind flange and then install a 20" valve and hot-tap the 24" blind. Shutting down the process will cost about $1,000,000 so that's out.
Any input would be appreciated.





RE: Hot Tap Blind Flange ?
1. B16.5 has restrictions on maximum size connection for blind flanges without hubs. (This may apply to NPT connections only)
2. Will gasket and flange bolting handle the welding temperature?
3. Have you considered freezing the line?
Please keep us informed as to how you resolve this.
donf
RE: Hot Tap Blind Flange ?
http://www.teaminc.com/literature_pdf/Hot_Tap_Broc...
donf
RE: Hot Tap Blind Flange ?
Any thoughts anyone ?
RE: Hot Tap Blind Flange ?
RE: Hot Tap Blind Flange ?
RE: Hot Tap Blind Flange ?
What about installing a Stopple valve on the 24" line just before the blind ?
Plug the line, remove the blind, install a 24" valve and you are ready to go.
Have no idea of the cost but we have used them previously while welding on a live methanol line and they were great.
Regards,
Kiwi
RE: Hot Tap Blind Flange ?
Why not perform a more conventional tap just upstream of the flange ?
It looks like, based on you picture, that there adequate room for the tap....
RE: Hot Tap Blind Flange ?