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11.ISO TS 22391-7 2018


a





N: new system;

D: change in design;

Ml: change of material grade; see Table 4

E: extension of the product range (except the products already covered by the scheme of sampling procedure];

P: change of production site of the pipes and fittings made of the same compounds to an existing product loca­tion, provided that the production process is equivalent;

+: test to he carried out.

h - taken in manufacturer’s laboratory can be taken into account, by agreement with the certification body.

c Test shall be made on one product diameter per size group and jointing system for the relevant design pres­sure and appropriate application class.

d -

-

nections remains conform to the corresponding test standard and there is a maximum of tests on 2 different pipe-fitting combinations in one test construction.

    1. Batch release tests (BRT)

Tables 8 and 9 shall he Table 8 or Table 9. as applicable.


Table 8 — Characteristics of pipes and minimum sampling frequencies for BRTs



Characteristic

Reference

Minimum sampling frequency

Appearance

ISO 22391-2:2009, 5.1

1 test piece at start up and at least every 8 h per machine

Outside diameter

ISO 22391-2:2009, 6.2.1, Table 3 to

Table 6

1 test piece at start up and at least every 8 h per machine

Wall thickness

ISO 22391-2:2009, 6.2.2, Table 3

to Table 7

1 test piece at start up and at least every 8 h per machine

Resistance to internal pressure (95 °C, 22 h]

ISO 22391-2:2009, Tables 8 and 9

1 test piece per 24 h per machine

Or




Resistance to internal pressure

a

1 test piece per week per machine

a In case of dispute testing at 95 °C and 165 h shall be done.

© ISO 2018 - All rights reserved 11



02.07.2019

flna c^ywe6Horo no^b30BaHMA MHCTMTyTy CTaHgapTOB (nn-4335_23.05.2019)

ISO/TS 22391-7:2018(E)


Table 8 (continued)



Characteristic

Reference

Minimum sampling frequency

Melt flow rate

ISO 22391-2:2009, Table 10

1 test piece at start-up per machine

Longitudinal reversion

ISO 22391-2:2009, Table 10

1 test piece per week per machine

Marking

ISO 22391-2:2009, Clause 10

1 test piece at start up and at least every 8 h per machine

a In case of dispute testing at 95 °C and 165 h shall be done.






Table 9 — Characteristics of fittings and minimum sampling frequencies for BRTs

Characteristic

Reference

Minimum sampling frequency3

Appearance

ISO 22391-3:2009, 5.1

1 test piece at start-up, and at least every 8 h per machine

Geometrical characteristics (but only those dimensions which vary by the manufacturing process and affect the function of the joint or fitting]

ISO 22391-3:2009, Clause 6

1 test piece at start-up, and at least every 8 h per machine

Resistance to internal pressure (20 °C, 1 h]

ISO 22391-3:2009, Clause 7

1 test piece/ batch, and at least once

per week per machine

Melt flow rate

ISO 22391-3:2009, Clause 8

1 test piece at start-up per machine

Marking

ISO 22391-3:2009, Clause 11

1 test piece at start-up, and at least every 8 h per machine

a

considered. The manufacturer’s quality plan shall give details accordingly. In such cases where more than one product is made per mould (family mould], sampling shall include all products.







The manufacturer's quality plan shall specify a batch or a lot.

A batch or lot shall only be released for supply when all the relevant tests and inspections have been carried out at least once at the specified frequencies and the requirements have been met.

If a product fails in respect of any characteristic given in Table 8 or Table 9. as applicable, the batch or lot shall be rejected or the retest procedures shall be performed for the characteristic on which the product failed. The retest procedure shall be given in the manufacturer’s quality plan.

    1. Process verification tests (PVT)

Tables 10 and 11 shall be Table 10 or Table 11 as applicable, if not

type tested or audit tested in the same period.


Table 10 — Characteristics of pipes and minimum sampling frequencies for PVTs



Characteristic

Reference

Minimum sampling fre­quency

Resistance to internal pressure (95 °C, 1 000 h]

ISO 22391-2:2009, Tables 8

and 9

3 test pieces per year per

diametera

a

quality plan shall give details accordingly.







© ISO 2018 - All rights reserved
12

02.07.2019

flna c^ywe6Horo no^b30BaHMA MHCTMTyTy CTaHgapTOB (nn-4335_23.05.2019)

ISO/TS 22391-7:2018(E)




Table 11 — Characteristics of fittings and minimum sampling frequencies for PVTs

Characteristic

Reference

Minimum sampling fre­quency3

Resistance to internal pressure (95 °C, 1 000 h)

ISO 22391-3:2009, Clause 7

3 test piece per year per size group and fitting group

a

shifts shall be considered. The manufacturer's quality plan shall give details accordingly.







If the product does not conform to the requirements in respect of any characteristic given in Table 10

or Table 11

performed.

If the retest procedure does not confirm conformity of the product to the requirements, then the process shall be investigated and corrected in accordance with the procedures given in the manufacturer’s

Table 10 or Table 11r as applicable.

A test performed as an AT does not need to be repeated as a PVT.

    1. Audit tests (AT)

ATs are performed if certification is involved only.

Table 12 to

Table 14 Table 12 to

Table 14


Table 12 — Characteristics of pipes and minimum sampling frequencies for ATs



Characteristic

Reference

Minimum sampling frequency

Appearance

ISO 22391-2:2009, 5.1

3 test pieces per year per size group

Dimensions

ISO 22391-2:2009, Table 3 to Table 7

3 test pieces per year per size group

Resistance to internal pressure (95 °C, 1 000 h)

ISO 22391-2:2009, Tables 8 and 9

3 test pieces per year per size group

Longitudinal reversion

ISO 22391-2:2009, Table 10

3 test pieces per year per size group

Melt flow rate

ISO 22391-2:2009, Table 10

3 sample per year per size group

Marking

ISO 22391-2:2009, Clause 10

3 test pieces per year per size group

Table 13 — Characteristics of fittings and minimum sampling frequencies for ATs

Characteristic

Reference

Minimum sampling frequencya

Appearance

ISO 22391-3:2009, 5.1

3 fittings per year per size group and fitting group

Dimensions

ISO 22391-3:2009, Clause 6

3 fittings per year per size group and fitting group

Resistance to internal pressure (95 °C, 1 000 h)

ISO 22391-3:2009, Clause 7

3 fittings per year per size group and fitting group

Melt flow rate

ISO 22391-3:2009, Clause 8

3 fittings per year per size group and fitting group

Marking

ISO 22391-3:2009, Clause 11

3 fittings per year per size group and fitting group

a

over time. For multiple cavity moulds, a rotating sampling procedure between the cavities for testing during the shifts shall be considered. The manufacturer’s quality plan shall give details accordingly. In such cases where more than one product is made per mould (family mould], sampling shall include all products.

© ISO 2018 - All rights reserved




13





02.07.2019

flna c^ywe6Horo no^b30BaHMA MHCTMTyTy CTaHgapTOB (nn-4335_23.05.2019)

ISO/TS 22391-7:2018(E)




Table 14 — Characteristics for fitness for purpose and minimum sampling frequencies for ATs

Characteristic

Reference

Minimum sampling frequency

Resistance to internal pressure (Pressure test (95 °C 1 000 h)

ISO 22391-5:2009, 4.2

a per size group and jointing system per year

a







Certification bodies may accept process verification tests (PVTs) as audit tests [ATs) if witnessed by them or by their agencies.

The sizes, types and classes selected for tests should preferably be primarily those which have not previously been selected for audit testing. Samples should be preferably taken from the largest volume of production per group.

    1. Indirect tests (IT)

Generally, testing shall be performed using the test methods referred to in the relevant part (s) of ISO 22391.

ITs may be used for BRT characteristics as given in Tables 8 and 9 Indirect testing shall not be used for TTs, PVTs or ATs.

The indirect test method used and the correlation or safe relationship of the indirect testing to the specified testing shall be documented in the manufacturer's quality plan. The continuing validity of the indirect testing shall be checked at regular intervals.

In cases of dispute, the BRTs as specified in Tables 8 and 9, shall be used.

If certification is involved, the IT can be accepted by certification body.

    1. Test records

Unless otherwise specified, all records shall be maintained for a minimum of ten years in accordance with the information given in the quality management system.

14 © ISO 2018 - All rights reserved

02.07.2019



flna cnywe6Horo nonb30BaHMA MHCTMTyTy CTaHgapTOB (nn-4335_23.05.2019)





ISO/TS 22391-7:2018(E)

Annex A

(informative)

Basic test matrix

Table A.1 — Basic test matrix for pipes







Characteristic

TT

BRT

PVT

AT




Influence on water intended for human consumption

According to national regulations

Hydrostatic stress properties of material

X










Appearance

X

X




X

Opacity

X










Dimensions

X

X




X

Resistance to internal pressure

X

X

X

X

Longitudinal reversion

X

X




X

Melt flow rate

X

X




X

Thermal stability

X










Marking

X

X




X




Table A.2 — Basic test matrix for fittings







Characteristic

TT

BRT

PVT

AT




Influence on water intended for human consumption

According to national regulations

Hydrostatic stress properties of material

X










Thermal stability

X










Appearance

X

X




X

Opacity

X










Dimensions

X

X




X

Resistance to internal pressure

X

X

X

X

Melt flow rate

X

X




X

Marking

X

X




X




Table A. 3 — Basic test matrix for fitness for purpose







Characteristic

TT

BRT

PVT

AT




Resistance to internal pressure

X







X

Leak tightness under internal pressure and bending

X










Resistance to pull-out

X










Resistance to thermal cycling

X










Resistance to pressure cycling

X










Leak tightness under vacuum

X













© ISO 2018 - All rights reserved 15








02.07.2019

flna c^ywe6Horo no^b30BaHMA MHCTMTyTy CTaHgapTOB (nn-4335_23.05.2019)

ISO/TS 22391-7:2018(E)

Bibliography


  1. CEN/TR 12108, Plastics piping systemsGuidance for the installation inside buildings of pressure piping systems for hot and cold water intended for human consumption

  2. ISO/IEC 17065, Conformity assessmentRequirements for bodies certifying products, processes and services

  3. ISO/IEC 17020, General criteria for the operation of various types of bodies performing inspection

  4. ISO/IEC 17025, General requirements for the competence of testing and calibration laboratories

  5. ISO 9000, Quality management systemsFundamentals and vocabulary

  6. ISO 9001, Quality management systemsRequirements

  7. ISO 9080, Plastics piping and ducting systemsDetermination of the long-term hydrostatic strength of thermoplastics materials in pipe form by extrapolation

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ISO/TS 22391-7:2018(E)
flna
c^ywe6Horo no^b30BaHMA MHCTMTyTy CTaHgapTOB (nn-4335_23.05.2019)



ICS 23.040.01; 91.140.60; 93.025

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