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BRITISH STANDARD BS EN1716 : 1997BS 2782 :Part 11 :Method 1108T :1997

The European Standard EN 1716 : 1997 has the status of aBritish Standard

ICS 23.040.45

NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW

Plastics piping systems Ð

Polyethylene (PE) tapping tees Ð

Test method for impactresistance of an assembledtapping tee

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BS EN 1716 : 1997

This British Standard, havingbeen prepared under thedirection of the Sector Board forMaterials and Chemicals, waspublished under the authority ofthe Standards Board and comesinto effect on15 June 1997

BSI 1997

The following BSI referencesrelate to the work on thisstandard:Committee reference PRI/61Draft for comment 95/121251 DC

ISBN 0 580 27391 1

Amendments issued since publication

Amd. No. Date Text affected

Committees responsible for thisBritish Standard

The preparation of this British Standard was entrusted to Technical CommitteePRI/61 Plastics piping systems and components, upon which the following bodieswere represented:

British Gas plc

British Plastics Federation

British Plumbing Fittings Manufacturers' Association

British Valve and Actuator Manufacturers' Association

Chartered Institution of Water and Environment Management

Department of the Environment (British Board of AgreÂment)

Department of the Environment (Building Research Establishment)

Department of Transport

Electricity Association

Health and Safety Executive

Institute of Building Control

Institute of Materials

Institution of Civil Engineers

Institution of Gas Engineers

National Association of Plumbing, Heating, and Mechanical Services Contractors

Pipeline Industries Guild

Plastics Land Drainage Manufacturers Association

Society of British Gas Industries

Society of British Water Industries

Water Companies Association

Water Services Association of England and Wales

The following bodies were also represented in the drafting of this standard, through

subcommittees and panels:

ERA Technology Ltd.

Engineering Equipment and Materials Users' Association

RAPRA Technology Ltd.

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BS EN 1716 : 1997

BSI 1997 i

Contents

Page

Committees responsible Inside front cover

National foreword ii

Foreword 2

Method 3

1 Scope 3

2 Normative references 3

3 Principle 3

4 Apparatus 3

5 Test pieces 3

6 Conditioning 3

7 Procedure 3

8 Test report 4

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ii BSI 1997

BS EN 1716 : 1997

National foreword

This British Standard has been prepared by Technical Committee PRI/61 and is theEnglish language version of EN 1716 : 1997 Plastics piping systems Ð Polyethylene(PE) tapping tee Ð Test method for impact resistance of an assembled tapping tee,published by the European Committee for Standardization (CEN).

It is incorporated into BS 2782 Methods of testing plastics: Part 11: Thermoplasticspipes, fittings and valves, as Method 1108T : 1997, for association with related testmethods for plastics materials and plastics piping components.

This test method has been prepared for reference by other standards underpreparation by CEN for specification of plastics piping and ducting systems andcomponents. It has been implemented to enable experience of the method to be gainedand for use for other fresh applications.

It is also for use for the revision or amendment of other national standards aspracticable, but it should not be presumed to apply to any existing standard orspecification which contains or makes reference to a different test method until thatstandard/specification has been amended or revised to make reference to this methodand adjust any requirements as appropriate.

Cross-references

Publication referred to Corresponding British Standard

EN 744 : 1995 BS EN 744 : 1996BS 2782 : Part 11 : Method 1108C : 1996 Plastics piping andducting systems Ð Thermoplastics pipes Ð Test method forresistance to external blows by the round-the-clock method

NOTE. In the descriptors, the term `shock resistance' should be read as `impact resistance' to avoidconfusion with methods for assessing resistance to thermal shock or hydraulic shock.

Warning note. This British Standard, which is identical with EN 1716 : 1997, doesnot necessarily detail all the precautions necessary to meet the requirements of theHealth and Safety at Work etc. Act 1974. Attention should be paid to any appropriatesafety precautions and the method should be operated only by trained personnel.

Compliance with a British Standard does not of itself confer immunityfrom legal obligations.

Summary of pages

This document comprises a front cover, an inside front cover, pages i and ii, the ENtitle page, pages 2 to 4, an inside back cover and a back cover.

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CENEuropean Committee for Standardization

ComiteÂ EuropeÂen de Normalisation

EuropaÈisches Komitee fuÈ r Normung

Central Secretariat: rue de Stassart 36, B-1050 Brussels

1997 Copyright reserved to CEN membersRef. No. EN 1716 : 1997 E

EUROPEAN STANDARD EN 1716

NORME EUROPEÂ ENNE

EUROPAÈ ISCHE NORM January 1997

ICS 23.040.45

Descriptors: Plastic tubes, fluid pipelines, polyethylene, junctions, impact tests, determination, shock resistance

English version

Plastics piping systems Ð Polyethylene (PE) tapping tees Ð

Test method for impact resistance of an assembled tapping tee

SysteÁmes de canalisations en plastiques Ð Prisesde branchement en polyeÂthyleÁne (PE) Ð MeÂthoded'essai pour la reÂsistance au choc d'une prise debranchement assembleÂe

Kunststoff-Rohrleitungssysteme Ð Anbohr-T-StuÈckeaus Polyethylen (PE) Ð PruÈfverfahren fuÈr dieWiderstandsfaÈhigkeit gegen Schlagbeanspruchungeines montierten Anbohr-T-StuÈcks

This European Standard was approved by CEN on 1996-09-02. CEN members arebound to comply with the CEN/CENELEC Internal Regulations which stipulate theconditions for giving this European Standard the status of a national standardwithout any alteration.

Up-to-date lists and bibliographical references concerning such national standardsmay be obtained on application to Central Secretariat or any CEN member.

This European Standard exists in three offical versions (English, French, German).A version in any other language made by translation under the responsibility of aCEN member into its own language and notified to the Central Secretariat has thesame status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Denmark,Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands,Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.

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EN 1716 : 1997

BSI 1997

ForewordThis European Standard has been prepared byTechnical Committee CEN/TC 155, Plastics pipingsystems and ducting systems, the secretariat of whichis held by NNI.

This European Standard shall be given the status of anational standard, either by publication of an identicaltext or by endorsement, at the latest by July 1997, andconflicting national standards shall be withdrawn atthe latest by July 1997.

The material-dependent parameters and/orperformance requirements are incorporated in theSystem Standard(s) concerned.

This standard is one of a series of standards on testmethods which support System Standards for plasticspiping systems and ducting systems.

According to the CEN/CENELEC Internal Regulations,the national standards organizations of the followingcountries are bound to implement this EuropeanStandard: Austria, Belgium, Denmark, Finland, France,Germany, Greece, Iceland, Ireland, Italy, Luxembourg,Netherlands, Norway, Portugal, Spain, Sweden,Switzerland and the United Kingdom.

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EN 1716 : 1997

BSI 1997

1 ScopeThis standard specifies a test method for the resistanceto impact of polyethylene (PE) tapping tees.

This standard is applicable to PE tapping tees intendedfor the transport of fluids.

2 Normative referencesThis Standard incorporates by dated or undatedreference, provisions from other publications. Thesenormative references are cited at the appropriateplaces in the text and the publications are listedhereafter. For dated references, subsequentamendments to or revisions of any of thesepublications apply to this Standard only whenincorporated in it by amendment or revision. Forundated references the latest edition of the publicationreferred to applies.

EN 744 : 1995 Plastics piping and ducting systemsÐ Thermoplastics pipes Ð Testmethod for resistance to externalblows by the round-the-clock method

3 PrincipleThe cap of the tapping tee is subjected to an impact bymeans of a weight falling from a constant height,parallel to the axis of the pipe onto which the tappingtee is fused.

After two impacts from opposite directions parallel tothe main axis of the pipe, the tee is inspected forvisible damage and for loss of airtightness.

The test is carried out at (0 ± 2) ÊC unless otherwisespecified in the referring standard.

NOTE. It is assumed that the following test parameters are set bythe standard making reference to this standard:

a) the sampling requirements (see 5.1);

b) the number of test pieces (see 5.3);

c) if applicable, the conditioning temperature (see clause 6).

4 Apparatus

4.1 A falling weight testing machine, incorporatingthe following basic components:

a) main frame, with guide rails or a guiding tubefixed in the vertical position to accommodate astriker and means to release it to fall vertically andfreely. When calibrated, the speed of the striker atthe moment of hitting the tapping tee shall be notless than 95 % of the theoretical speed;

b) striker, conforming to EN 744, but having aspecial nose consisting of a cylinder with a diameterof (50 ± 2) mm and having a mass of (2500 ± 20) g.

4.2 A rigid support, with a steel mandrel capable ofmaintaining the test piece in the position shown infigure 1, and means capable of preventing any rotationof the test piece during the test.

5 Test pieces

5.1 Sampling

The sampling requirements shall be as specified in thereferring standard.

5.2 Preparation of test pieces

The test pieces shall comprise a complete assembly ofa pipe, a tapping tee and an end cap. The length of thepipe shall be such that L equals de (see figure 1).

All joints shall be assembled in accordance with thetapping tee manufacturer's instructions.

5.3 Number of test pieces

The number of test pieces shall be as specified in thereferring standard.

6 ConditioningAt least 24 h after the tapping tee has been assembled,the test piece shall be conditioned at (0 ± 2) ÊC, unlessotherwise specified by the referring standard, for 4 h inair or 2 h in a liquid bath.

7 Procedure

7.1 Condition the test piece in accordance withclause 6 and ensure that the striker will fall throughthe specified height (see 7.3) before removing the testpiece from conditioning. Proceed immediately to 7.2.

7.2 Within 30 s of removal from conditioning, slip thetest piece over the mandrel as shown in figure 1 andstrike the test piece in accordance with 7.3 or 7.5, asapplicable.

7.3 Drop a striker (4.1) on to the cap of the tappingtee from a height of (2000 ± 10) mm along an axisparallel to that of the pipe onto which the tapping teeis assembled. The point of impact, P, on the end capshall be situated as shown in figure 1.

7.4 Invert the assembly in order to hit the oppositeside of the cap.

7.5 After reconditioning under the same conditions,repeat the procedure of 7.2 and 7.3 to strike the capon the opposite side of the stem of the tapping tee.

7.6 Examine the joint visually, without magnification,and record any crack or rupture, along with itsposition and its extent.

7.7 Using a liquid as an external leak detector, testthe airtightness of the test piece at 25 mbar at anambient temperature of (23 ± 2) ÊC. Record anyevidence of leakage.

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EN 1716 : 1997

BSI 1997

L = de

L1 = 0,5 L2

A Steel mandrel

B End cap

P Point of impact

Figure 1.

8 Test reportThe test report shall include the following information:

a) the reference to this standard and to the referringstandard;

b) the complete identification of the sample,including the type of material and the nominaldimensions of the pipe and of the tapping tees;

c) the test temperature;

d) the mass of the falling weight;

e) the drop height;

f) the number of test pieces tested;

g) any type of failure and/or evidence of leakage;

h) any factors which may have affected the results,such as any incidents or any operating details notspecified in this standard;

i) the date of test.

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BSI 1997

BS EN 1716 : 1997

List of references

See national foreword.

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