The only thing that I noticed, after a glance, was the joint preparation.
Joint Preparation: Oxy-cutting?
Oxy-fuel cutting on stainless steel doesn't work too well.
In D1.1:
Table 6.1 for allowable under size of fillet welds.
Maximum size requirements for fillet welds:
Table 3.7 (maximum single pass fillet weld size for prequalified WPS)
and:
2.4.2.8, 2.4.2.9