English to Portuguese Tech/Engineering

Olá amigos,

Estou traduzindo alguns slides referentes à produção de flexitubos e gostaria de saber se alguém poderia me informar o que seria a frase entre aspas. Adicionarei dois slides para um maior contexto.
Obrigado

1) MAKING COILED TUBING: A STRING IS BORN
. Talk objective:
To describe the manufacturing steps and the QC measures that together insure product reliability

2)CASTING SLABS
. Slabs are cast from a batch (heat) of steel prepared in a blast furnace according to "PTT proprietary chemistry" for specific steel grade
. Slabs are stocked at the mill to improve delivery to "PTT" and customers.