API 1104 Appendix B suggests harness limits of 350 HV (Vickers), evaluated to C.E. of pipe materials, SMYS, and welding process. When using cellulosic electrodes 350Hv might be high when considering thermal cooling capacity and carbon equivalent of older systems (typically vintage X52). This report by Det Norske Veritas is very informative to get you started. PRCI (technical toolboxes) offers an excellent course on this very issue, worth your time. There are many variables, options, to control these issues.
I assumed you were referring to In-Service welding....if not, yes there are still concerns for new construction and pre-fab. There was a post a couple months back regarding soaking cellulosic electrodes in water which eventually led this discussion there as well. A couple links were posted.
Forum