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PE100+ Materials
Water & gas pressure pipe  : PE pipe, Quality Materials List
 

PE 100+ Association qualifies PE 100-RC+ (Resistant to Crack) materials

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PE 100-RC+ materials have become an essential and well established sub-family of PE 100 compounds. They have a higher stress crack resistance and hence less risk of failure due to damage during installation or due to point loads after installation. This in turn has facilitated the greater use of trenchless technology installation methods, which have a reduced environmental impact.

In order to classify and monitor the performance of these PE 100-RC+ compounds the pipe industry, with the support of the PE 100+ Association, has identified four test methods that thoroughly describe the performance of these materials with regards to their stress crack resistance

  1. Strain Hardening test according to ISO 18488

  2. Cracked Round Bar test according to ISO 18489

  3. Accelerated Notched Pipe Test - ANPT - following ISO 13479, using currently a 2%Nonyl-Phenyl-Ethoxylate solution

  4. Accelerated Full Notched Creep Test – AFNCT – using a 6,67 % solution of a Lauramine-Oxide

All of the above tests have been additionally implemented in the recently revised European standard EN 1555 for gaseous fuels published in 2021. Implementation of similar requirements is in progress in EN 12201 for water applications. Furthermore, these tests will be taken up in the corresponding ISO standards ISO 4437 and ISO 4427, when these are updated.

In order to ensure the high quality level of PE 100+ materials, the PE 100+ Association has established an extra quality list for the PE 100-RC compounds.

In order to get a PE 100-RC candidate material listed the requirements summarized in Table 1 must be fulfilled. For PE 100-RC materials that are already listed as PE 100, the pressure test and RCP test, do not have to be executed again for the initial listing. Moreover, for these types of material the standard Notched Pipe Test in water is replaced by the Accelerated Notched Pipe Test.


Table 1 – Summary of requirements for candidate PE 100-RC+ materials


Property

Test method

Requirement

Test method

Creep Rupture Strength

Pressure test at 20 °C and 12,0 MPa

≥ 200 h

ISO 1167

Resistance to Rapid Crack Propagation

Pc S4 at 0 °C

≥ 10 bar

ISO 13477





Stress Crack resistance

Accelerated Notch Pipe test ANPT in 2% Nonyl-Phenol-Ethoxylate solution1)
80 °C – 9,2 bar

≥ 300 h

ISO 13479

Stress Crack resistance

Cracked Round Bar Test CRB

≥ 1,5 x 106 cycles

ISO 18489

Stress Crack resistance

Accelerated FNCT test (AFNCT)
In 2% Lauramine-Oxide solution
90 °C – 4,0 MPa
alternatively
90 °C – 5,0 MPa

≥ 550 h

≥ 300 h

ISO 16770

Stress Crack resistance

Strain Hardening Test (SH)
from regrinded pipe

≥ 50,0 MPa

ISO 18488

  1. Currently the test is carried out in a 2% Nonyl-Phenol Ethoxylate solution (e.g. Arkopal®N100). It is expected to carry out the test in 2% Lauramine-Oxide solution (e.g. Dehyton PL®) as from 2024 with new specification.


Like for the standard PE 100 materials listing, PE 100-RC candidate has to pass the tests successfully two times in a row for initial listing and must pass the tests of the consecutive annual test rounds as provided in the Table 2 hereunder.


Table 2 – Initial qualification and annual check test programs for PE 100-RC materials


Test method

Test method

Initial qualification

Annual check

Specimens

Pressure test
20 °C – 12,0 MPa

ISO 1167

2 successful test rounds in a row

1/year

Pipe
110 mm SDR 11

RCP Test PcS4 at 0 °C

ISO 13477

2 successful test rounds in a row

1/year

Pipe
110 mm SDR 11






Accelerated Notch Pipe test ANPT 1)

ISO 13479

2 successful test rounds in a row

1/year

Pipe
110 mm SDR 11

Cracked Round Bar Test CRB

ISO 18489

2 successful test rounds in a row

-

Granules

Accelerated FNCT test (AFNCT)

ISO 16770

2 successful test rounds in a row

-

Granules

Strain Hardening Test (SH)
from regrinded pipe

ISO 18488

2 successful test rounds in a row

1/year

Regrind Pipe
110 mm SDR 11

  1. Currently the test is carried out in a 2% Nonyl-Phenol Ethoxylate solution (e.g. Arkopal®N100). It is expected to carry out the test in 2% Lauramine-Oxide solution (e.g. Dehyton PL®) as from 2024 with new specification.


In this respect, PE 100+ uncompromisingly follows the strict quality and listing rules that have been established for PE 100+ compounds.

Last update Sunday 28 April 2024

Members of the Association

BOREALISBOROUGEFormosa Plastics CorporationHanwha TotalEnergiesINEOS O&PIRPCKorea Petrochemical IND. Co., LTD (KPIC)LyondellBasellORLEN UnipetrolPetroChina Dushanzi Petrochemical CompanyPRIME POLYMERSABICSCG Chemicals & Thai PolyethyleneSinopecTASNEE
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