Table 2.

Procedures for pipe cleaning.

Pipe type	Process	Solution	Temperature	Duration	Observation
Bent pipes	Degreasing	Water and T-149-E (6.25% ± 1%)	70 ${}^{\circ }$C ± 10 ${}^{\circ }$C	15 ± 5 min
	Pickling	Hot water	60 ${}^{\circ }$C ± 10 ${}^{\circ }$C		PH: from 5 to 8
Carbon steel pipes	Degreasing	Water and T-149-E (6.25% ± 1%)	70 ${}^{\circ }$C ± 10 ${}^{\circ }$C	45 ± 5 min
	Pickling	Water and DECAPINOX C (10% ± 2%)	25 ${}^{\circ }$C ± 10 ${}^{\circ }$C	15 ± 5 min
	Rinsing	Hot water	60 ${}^{\circ }$C ± 10 ${}^{\circ }$C		PH: from 5 to 8
Cooper alloys	Degreasing	Water and T-149-E (6.25% ± 1%)	70 ${}^{\circ }$C ± 10 ${}^{\circ }$C	15 ± 5 min
	Passive Pickling	Water and SCALE-GO (4.37% ± 1%)	50 ${}^{\circ }$C ± 10 ${}^{\circ }$C	15 ± 5 min
	Rinsing	Hot water	60 ${}^{\circ }$C ± 10 ${}^{\circ }$C		PH: from 5 to 8
Stainless steel	Degreasing	Water and T-149-E (6.25% ± 1%)	70 ${}^{\circ }$C ± 10 ${}^{\circ }$C	15 ± 5 min
	Passive Pickling	Water and DECAPINOX C (10% ± 2%).	25 ${}^{\circ }$C ± 10 ${}^{\circ }$C	15 ± 5 min
	Rinsing	Hot water	60 ${}^{\circ }$C ± 10 ${}^{\circ }$C		PH: from 5 to 8