For the improvement of run length, we would like to replace about 1/3 of total radiation tubes of 9 Cr 1 Mo with SS 347 H.
1) How much % improvement in runlength is feasible between two spalling?
2) How much max TMT is allowed in such combination of radiation tubes?
3) What will be Spalling temp limit?
4) What precaution to be taken care for welding of two dissimilar joints?