Temperbead Qual Section IX
Temperbead Qual Section IX
(OP)
We are qualifying a hot tap procedure to section IX. What has been the approach to get around the thickness range limitation of fluid backing and >T in 290?
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS Come Join Us!Are you an
Engineering professional? Join Eng-Tips Forums!
*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail. Posting GuidelinesJobs |
Temperbead Qual Section IX
|
RE: Temperbead Qual Section IX
RE: Temperbead Qual Section IX
RE: Temperbead Qual Section IX
RE: Temperbead Qual Section IX
RE: Temperbead Qual Section IX
RE: Temperbead Qual Section IX
I was aiming for 350 HV10 but do recognize that we can be somewhat higher since the rod is 7018 H4 and the CE is .49...
Also you would only worry about the inside hardnesses? You would worry about outside the nozzle and the repad to tank weld?
RE: Temperbead Qual Section IX
Interesting question; is the tank shell steel hardenable? Of course it isn't. Will you melt the steel on the interior? Nope; that would give a leak. Thus = impossible to harden the interior of the tank.
Why use 7014; 7018 is the standard for a malleable & strong weld deposit? Run a small mock-up coupon, and section the weld. The Vickers hardness traverse needs to include Shell basemetal, shell HAZ, weld root, weld interior, weld cap. Might as well include Hot-tap nozz hardness too. IMHO, any hardness below [BHN = 200] is acceptable, and there are arguments for harder welds being OK.
RE: Temperbead Qual Section IX
RE: Temperbead Qual Section IX