Colin et al.

Kinetic Modeling of the aging of PE pipes for the Transport of water containing Disinfectants

2006

MDPE

20 - 40

NR

2 - 99 days/5 - 18 years

ClO2

PE antioxidant is quickly consumed uniformly in presence of chlorine dioxide to the −1 mm depth; examined filed pipe shows same results; ClO2 reactions with PE and antioxidant are identified.

Dear and Mason [13]

Effect of chlorine on Polyethylene Pipes in water distribution networks

2006

MDPE

60 - 80

NR

200 - 10,752 Hrs

Chlorine

Observation of failed PE pipes and laboratory work at high Cl concentrations (3000 - 10,000 mg/l) shows that failure occurs by slow crack growth due to creep after initial inner layer of pipe is degraded by chain scission/oxidation; PE in plants can see 3000 mg/l Cl and life is expected to be <10 years.

Castegnetti et al. [111]

Effect of chlorinated water on the oxidative resistance and the mechanical strength of PE pipes

2007

HDPE

25 - 80

6.5 - 7.5

0 - 19 weeks

chlorine, and chlorine dioxide

HDPE degrades in the prsences of chlorine dioxide and chlorine under pressure conditions; elongation at fracture after 2 weeks is 50% versus > 700% for control.

Chung et al. [158]

An examination of the realative impact of common poatable water disinfectants (chlorine, chloramines and chlorine dioxide) on plastic piping system components

2007

PEX

ASTM F 2023

6.8

ASTM F 2023

chlorine, chloramines and chlorine dioxide

PEX fails in the presence of various disinfectants with inner wall degradation followed by mid and outer wall crack propagation in sample under pressure; chlorine and chlorine dioxide diffusiuon may make these disinfectants more aggressive in polymer degrdation

Audouin et al.

Durability of PE Piper Trasporting Chlorine Dioxide Disinfected water-kinetics modeling of embrittlement process

2007

MDPE

20 - 40

2 - 6

1200 Hr

Chlorine Dioxide

Laboratory work confirms dioxide attack on PE resulting in chian scission of PE chains leading to “end of life” embrittlemnt due to free radical kinetics; embrittlment at 400 Hr at 40 degree C; predictive modeling in process.

Montes et al., [117]

Ageing of PE at raised temperature in contact with chlorinated sanitary hot water.

2012

PE

70

9.4 - 8.8

270 days

Chlorine (0, 1, 25, 100 ppm)

Results showed that the degradation rate was almost equivalent for 25 and 100ppm conc ageing.

Damodaran et al. [66]

Monitoring the effect of Chlorine on the ageing of PP pipes by infrared microscopy

2015

PP

95

6.8

500 Hrs

Chlorine (4 mg/L)

The effect of hot water at 95˚C on differently nucleated random PP pipes was analyzed with respect to the chemical changes occurring to the polymer and antioxidant.

Zebger et al.

[43]

Degradation of poly (1,4-phenylene sulfide) on exposer to chlorinated water

2005

PPS

-

2 - 8

1 week

Chlorine (0 - 0.09 M)

Results suugested that upon exposer to chlorinated water, PPS under goes a series of reaction that 1) oxidize the sulfide to the sulfoxide and sulfone, 2) alter and disrupt the phenyl ring, and 3) apparently cleave the polymer such that material loss was observed. This data indicate that Cl2 and HOCL are species that initiate reaction. In comparison to other (polyamide PA66, Poly(styrene-co-butadiene), and polystyrene), PPS is more sensitive to the effect of chlorinated water.