PG test и PG heats gen.

[cestpas]

Здравствуйте! Помогите, пожалуйста, перевести PG в сочетаниях PG test и PG heats. Вот контекст:

Up to day we still did not receive:
- the results of all grounded slabs from previous PG test SS campaign. We received only partial results,as cast average value, not for each single slab.
- The quality results (internal, surface and dimensionnal) of carbon steels PG heats (from 02nd to 27th of August). We received only partial results, not for all PG heats.

[witness]

...марка стали PG?... тогда PG heats - плавки стали PG ...
Material: Electro Galvanized Carbon Steel (PG)