Tig Root on P91

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Hello everyone, I was wondering if anyone has any pointers or tips as to tig welding on P91 Crome Heavywall pipe. I have welded lots os P22 pipe but not to familiar with the characteristics of the 9 chrome. I know it must be back purged but what type of technique should be used for the root pass. Should I key hole the root or just lay the wire in the groove? The joints I am doing are in very confined spaces and some are to tight to access on the one side. What about feeding the wire through the joint as opposed to on the outside of the joint? Any help would be greatly appreciated, Thanks ,ironmike128
Reply:you could have a look to the below link:Last edited by 7A749; 09-30-2013 at 08:11 PM.
Reply:Dude enough with the spam.If you want to post an answer, post it here and don't create imaginary characters that post the same question in your forum and then post the link here.
Reply:Yup, sadly, most all his posts are like that. 1st on WeldingWeb to have a scrolling sig! HTP Invertig 400HTP Invertig 221HTP ProPulse 300HTP ProPulse 200 x2HTP ProPulse 220MTSHTP Inverarc 200TLP HTP Microcut 875SC
Reply:Should I be flattered that he copied one of my posts here as a reply to a made up thread on his forum?
Reply:Originally Posted by zankShould I be flattered that he copied one of my posts here as a reply to a made up thread on his forum?