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How will the lifetime of different multi-layer pipes be affected when exposed in a circulation loop compared with hydrostatci pressure testing?
(U. Andersson)

Long term pressure test on plastic pipes for the validation of Miner´s rule
(H. Leijström, M. Ifwarson 716 Kb)

PEX, PE, PP and PVC pipes exposed to different chemicals
(U. Andersson, M. Ifwarson 600 Kb)

What controls the lifetime and how can the lifetime be extrapolated?
(M. Ifwarson, H. Leijström 1 Mb)

Slow Crack Growth Test as a Ranking Method
(T. Tränkner 590 Kb)

Which factors control the lifetime of plastic pipes and how the lifetime can be extrapolated
(U. Andersson 319 Kb)



Available in full content here by permission from Carl Hanser Verlag

Lifetime of polyethylene pipes under pressure and exposure to high temperatures
(M. Ifwarson 350 Kb)

Zwölf Jahre Erfarung bei der Untersuchung von vernetzem PE
(M. Ifwarson, P.Eriksson 1.9 Mb)

Temperature Limit of Polybutylene Hot Water Pipes
(M. Ifwarson, T. Tränkner 312 Kb)




Papers published in Polymer Engineering and Science, where you can read the abstract of each paper below and download (for a fee) the full paper in pdf-format. You can also contact Exova Nyköping Polymer and we can send you a re-print (if available).

1 GEDDE U W and IFWARSON M
Molecular Structure and Morphology of Crosslinked Polyethylene in an Aged Hot-Water Pipe. Pol. Eng. Sci. 4 (1990).

2 KARLSSON K, SMITH G D and GEDDE U W
Molecular Structure, Morphology and Antioxidant Consumption in Medium Density Polyethylene Pipes in Hot-Water Applications. Pol. Eng. Sci. 10 (1992).

3 SMITH G D, KARLSSON K and GEDDE U W
Modeling of Antioxidant Loss from Polyolefines in Hot-Water Applications. I:
Model and Application to Medium Density Polyethylene Pipes. Pol. Eng. Sci. 10 (1992).

4 KARLSSON K, ERIKSSON P-A, HEDENQVIST M, IFWARSON M, SMITH G D and GEDDE U W
Molecular Structure, Morphology and Antioxidant Consumption in Polybutene-1 Pipes in Hot-Water Applications. Pol. Eng. Sci. 5 (1993)

5 TRÄNKNER T, HEDENQVIST M and GEDDE U W
Molecular Structure and Lamellar Structure of an Extrusion-Grade Medium Density Polyethylene for Gas Distribution. Pol. Eng. Sci. 20 (1994).

6 VIEBKE J, ELBLE E, IFWARSON M and GEDDE U W
Degradation of Unstabilized Medium Density Polyethylene Pipes in Hot-Water Applications. Pol. Eng. Sci. 17 (1994).

7 GEDDE U W, VIEBKE J, LEIJSTRÖM H and IFWARSON M
Long-Term Properties of Hot-Water Polyolefin Pipes - A Review. Pol. Eng. Sci., 2 (1994).

8 TRÄNKNER T, HEDENQVIST M and GEDDE U W
Structure and Crack Growth in Gas Pipes of MDPE and HDPE. Pol. Eng. Sci., 16 (1996).

9 HEDENQVIST M, JOHNSSON G, TRÄNKNER T, VARKALIS A and GEDDE, U W
Polyethylene Exposed to Liquid Propane: Sorption Kinetics and Mechanical Properties. Pol. Eng. Sci. , 2 (1996).

10 VIEBKE J, ELBLE E and GEDDE U W
Degradation of Polyolefin Pipes in Hot-Water Applications; Simulation of the Degradation Process, Pol. Eng. Sci., 4 (1996).

11 TRÄNKNER T, HEDENQVIST M and GEDDE U W
Structure and Strength of a Polyethylene Pipe Grade Containing Glass Spheres and Low-Molar-Mass Linear Polyethylene. Pol. Eng. Sci., 2 (1997).

12 VIEBKE J and GEDDE U W
Antioxidant Diffusion in Polyethylene Hot-Water Pipes. Pol. Eng. Sci., 5 (1997).

13 VIEBKE J and GEDDE U W
Assessment of Lifetime of Hot-Water Polyethylene Pipes Based on Oxidation Induction Time Data. Pol. Eng. Sci., 8 (1998).

14 J. Hassinen
Deterioration of polyethylene pipes exposed to chlorinated water. J. Hassinen et al. Polymer Degradation and Stability 84 (2004), 261-267.