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Regression Analysis According To ISO 9080 of The PE Pipe Grade P600BL

Bodycote Polymer conducted hydrostatic pressure testing and regression analysis on PE pipe grade P600BL according to ISO 9080 standards. The testing was done at 20°C, 60°C, and 80°C to obtain long-term hydrostatic strength values. Regression analysis using the 4-parameter model provided the best fit to the data. Extrapolation of the results according to ISO 9080 classified the material with an MRS of 10 MPa.

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203 views1 page

Regression Analysis According To ISO 9080 of The PE Pipe Grade P600BL

Bodycote Polymer conducted hydrostatic pressure testing and regression analysis on PE pipe grade P600BL according to ISO 9080 standards. The testing was done at 20°C, 60°C, and 80°C to obtain long-term hydrostatic strength values. Regression analysis using the 4-parameter model provided the best fit to the data. Extrapolation of the results according to ISO 9080 classified the material with an MRS of 10 MPa.

Uploaded by

shizu mon
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
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Client: Korea Petrochemical Ind. Co., Ltd.

Regression analysis according to ISO 9080 of the


PE pipe grade P600BL

[MPa] Hoop stress


20 Standard method: ISO 9080:2003
4-parameters model P600BL

10

5
4 50 σ LPL= 10.540 MPa
years
MRS = 10 MPa
3
20°C 60°C 80°C
100
years σ LPL= 10.428 MPa
water/ water/ water/
water water water
2
Ductile mode Internal code: 3400
Brittle mode Date: 2005-11-14
LTHS
Mixed mode LPL
Under test
1
10 0 10 1 10 2 10 3 10 4 10 5 10 6
Time [h] 1 10 50 years

Introduction Results obtained


Bodycote Polymer offers accredited testing and The evaluation was performed in accordance with
evaluation according to ISO 9080, i.e. hydrostatic ISO 9080:2003. The 4-parameters model gave the
pressure testing followed by evaluation of the long- best fit.
term hydrostatic strength and MRS-classification
according to ISO 12162. Number of observations

20°C 60°C 80°C


Task 34 33 30
The aim was to use the Standard Extrapolation
Method (SEM) according to ISO 9080:2003 in order to Extrapolated strength values
obtain a classification of the PE pipe grade P600BL
Temp Time σLPL σLTHS
from Korea Petrochemical Ind. Co., Ltd.
°C yrs MPa MPa
20 50.0 10.540 10.874
The work covers hydrostatic pressure testing at 20,
20 100 10.428 10.765
60 and 80°C and a SEM-evaluation according to
60 7.29 6.600 6.863
ISO 9080:2003.
80 1.21 5.087 5.312

Classification: MRS = 10 MPa

Please contact us for further information!


Bodycote Polymer SE-611 82 Nyköping SWEDEN
phone + 46 155 22 14 76 fax +46 155 26 31 25
www.bodycotepolymer.com info@bodycotepolymer.com
SP190/06-02/JJ

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