Прошу помочь перевести фразу из руководства к Ammonia plant.

Because of the complexity of the piping layouts from the molecular sieves through the synthesis loop, specific details and sequences of line, blowing will be developed in the Field.
However, be sure that all of the lines are blown to and from the following major equipment:
1-109-DA and associated piping
1-109-DB and associated piping
1-109-Ds regeneration inlet and outlet lines ***to and from the process stream to fuel gas

Затрудняет "to and from the process stream to fuel gas"

Спасибо.