Depending on a person’s reservation category, their rank in TS EAMCET has to be <10k for them to get a seat in JNTUH. For cap-category students, the rank cutoff is extended further. Even if you get above 30k, some branches will be open for you. During my brother’s admission a few years back, around 55k students got into the Metallurgy Department.
Thus, as a cap quota candidate, you can get a seat in JNTUH even with a rank above 30k, but this may vary if you wish to get into a particular branch.