Agrément Certificate 2011/392 - agrement.co.za · Agrément Certificate 2011/392: Geberit soil and...

Agrément Certificate 2011/392 : Geberit soil and waste drainage system of 33

Copyright © Agrément South Africa, August 2011

The master copy of this document appears on the website: www.agrement.co.za

Validity

Users of any Agrément certificate should check its status: all currently valid certificates are listed on the website. In addition, check whether the certificate is Active or Inactive.

The certificate holder is in possession of a confirmation certificate attesting to his status.

P O Box 395 Pretoria 0001

Telephone +27 12 841 3708

Fax +27 12 841 2539

e-mail [email protected]

http www.agrement.co.za

Subject: Geberit HDPE Above Ground Soil

and Waste Drainage System

Certificate holder: Geberit Southern Africa (Pty) Ltd

PO Box 276, WENDYWOOD, 2144

Telephone: 011 444 5070

Fax: 011 444 5992

Email: [email protected]

www.geberit.co.za

Typical Geberit fittings Geberit Sovent fitting Description and use

The Geberit Soil and Waste Drainage System is a single stack system assembled from moulded fittings and extruded pipes manufactured from PE80 high-density polyethylene (HDPE). Systems include Geberit Sovent branch fittings which give the system its innovative properties. Pipes and fittings are available in diameters ranging from 32 to 315 mm while the Sovent fitting is available in a diameter of 110 mm. Pipes are available in standard lengths of 5 m.

The certificate covers the use of the system for the conveyance of above-ground sewerage (below 80 °C) from domestic, commercial and public buildings.

This certificate and Agrément South Africa’s assessment apply only to the Geberit Soil and Waste Drainage Systems when:

components are manufactured by Geberit Ltd and installed by persons trained by Geberit Ltd

the terms and conditions of certification are complied with.

Agrément Certificate 2011/392

Quick guide

Contents page 3

Preamble page 4

Conditions of certification page 5

Assessment page 7

Compliance with the National Building Regulations page 8

Technical description page 9

http://www.agrement.co.za/

http://www.agrement.co.za/directory.html

mailto:[email protected]

http://www.agrement.co.za/


Agrément Certificate 2011/392: Geberit soil and waste drainage system of 33

CONTENTS

PREAMBLE

PART 1: CONDITIONS OF CERTIFICATION

PART 2: ASSESSMENT

Scope of assessment

Assessment

Table 1: Compliance with National Building Regulations

Table 2: Performance

Table 3: Quality management system

PART 3: TECHNICAL DESCRIPTION

General description

Pipe and fitting manufacture

Design of drainage systems

Technical support and training

Installation

Maintenance


PREAMBLE

This certificate is issued by Agrément South Africa in terms of the powers granted to it by the Minister of Public Works. This certificate:

has been granted after a technical appraisal of the performance of the Geberit Above Ground Soil and Waste Drainage System for the uses covered by the certificate

is independent of any patent rights that may or may not subsist in the subject of the certificate

does not relieve the certificate holder from the obligation to obtain the prior approval of the building authority concerned for the use of the subject.

Agrément South Africa considers that the quality and performance of the Geberit Above Ground Soil and Waste Drainage System will be satisfactory, provided that the requirements stipulated in this certificate are adhered to. However, Agrément South Africa does not on behalf of itself, or the State, or any of its employees or agents, guarantee such quality or performance.

Responsibility for compliance with the requirements of this certificate and the quality of the finished product resides with the certificate holder.

No action for damages, or any other claim whatsoever, lies against Agrément South Africa, its members, the State or any of its employees, should the said components and materials fail to comply with the standard set out in this certificate.

Interested parties or users who are in any doubt about any detail or variation should contact Agrément South Africa.

The validity of this certificate is reviewed every three years. The certificate shall remain valid as long as Agrément South Africa is satisfied that:

the certificate holder complies with the general and specific conditions of certification and the technical requirements stipulated in the certificate

the performance-in-use of the subject is acceptable

any changes in building legislation, regulations, relevant standards or Agrément performance criteria have not invalidated the technical assessment that formed the basis of certification.

Agrément South Africa reserves the right to withdraw the certificate at any time, should reasonable cause exist.

Notices affecting the validity of this certificate will be published in the Government Gazette.



PART 1: CONDITIONS OF CERTIFICATION

Components of the Geberit Above Ground Soil and Waste Drainage System as described in this certificate must be:

manufactured by the certificate holder

Installed or used in accordance with

o the technical description set out in Part 3

o the certificate holder’s installation manual or specifications

o good building practice

o comply with the Conditions of Certification.

Any change to material formulations, the production process, or the installation techniques as set out in the certificate holder’s specifications could result in various aspects of the performance of this product no longer complying with Agrément South Africa’s performance criteria. Any change not authorised by Agrément South Africa in writing prior to its implementation will invalidate this certificate and the certificate can then not be used to demonstrate compliance with the National Building Regulations.

General conditions

Marking

Where possible, components of the system or packaging must be suitably marked with:

Agrément South Africa’s identification logo together with the number of this certificate

the works order number, batch number, date, as applicable, and storage recommendations.

Validity

The continued validity of this certificate is subject to a satisfactory review by Agrément South Africa every three years.

Quality monitoring

The certificate holder is required to participate in Agrément South Africa’s post-certification quality management system, which requires:

that the certificate holder shall continue to implement and manage the quality system approved by Agrément South Africa in the assessment of the Geberit Above Ground Soil and Waste Drainage System

the cooperation of the certificate holder in facilitating post-certification quality monitoring by Agrément South Africa or its authorised agents.

Geberit Above Ground Soil and Waste Drainage System

Tested and approved fit for purpose when constructed as specified in

CERTIFICATE 2011/392


Reappraisal

must be requested by the certificate holder prior to making changes to the system

will be required by Agrément South Africa if there are changes to the National Building Regulations or Agrément South Africa.

This certificate may be withdrawn if the certificate holder or a registered licensee fails to comply with these requirements.

On behalf of the Board of Agrément South Africa

Chairperson August 2011


PART 2: ASSESSMENT

Scope of assessment

This assessment applies to those innovative aspects of the Geberit Above Ground Soil and Waste Drainage System as described in Part 3 of the certificate. It also applies to those conventional aspects of the product which, in the opinion of Agrément South Africa, are influenced by the innovative aspect.

The innovative aspect referred to is the introduction of the Sovent branch fitting into a single stack drainage system, which reduces the extent of vent piping required, allows up to six connections to be made per branch fitting, and improves efficiency of the system thereby increasing loading capacity.

Assessment

In the opinion of Agrément South Africa, the Geberit Above Ground Soil and Waste Drainage System as described in the certificate is suitable for the use specified (see page 1).

The performance-in-use of the Geberit Above Ground Soil and Waste Drainage System will be such that it will satisfy:

the requirements of the National Building Regulations stated in Table 1. Any regulation not specifically referred to is considered to be outside the scope of this certificate and must be applied by the local authority in the normal manner.

Agrément South Africa’s performance criteria.

Agrément South Africa’s detailed comments on the assessment are set out in Tables 1, 2 and 3 below. Each aspect of performance was assessed by experts in that field.

The conventional aspects of the construction are subject to the rules of good building practice (typically as described and illustrated in Agrément South Africa’s Supplement to certificates and in the Home building manual Parts 1, 2 & 3 issued by the National Home Builders Registration Council), and must comply with the National Building Regulations.

Republic of South Africa. National Building Regulations, Government Notice R. 2378, Government Gazette No 12780, Pretoria, South Africa, 12 October 1990

http://www.agrement.co.za/PDFS/v2-supplement.pdf

http://www.agrement.co.za/PDFS/v2-supplement.pdf


Table 1: Compliance with the National Building Regulations

Aspects of performance

Opinion of Agrément South Africa

National Building Regulations satisfied

Fitness-for-purpose of materials used

The quality and suitability of the materials making up the system are satisfactory

The materials used in the Geberit Above Ground Soil and Waste Drainage System are deemed to satisfy the requirements of Regulation A13(1)(a) Materials

Drainage Satisfactory, provided the requirements of this certificate are complied with

Regulation P2 (1) Design of drainage installations is deemed to be complied with when installations are designed by approved competent persons


Table 2: Performance


Opinion of Agrément South Africa

Explanatory notes

Drainage layout and calculation

Satisfactory

The Geberit system, when designed in accordance with Geberit guidelines, meets the requirements of SANS 50256-2/ EN 12056-2 with respect to layout and calculation

Hydraulic performance-cross flow in critical fittings

Satisfactory, subject to reduced flow rates being adopted for opposing 100 mm nominal diameter branch pipes at Sovent fittings

Pipe flow rates recommended in SANS 10400-P (Table 13) and SANS 10252-2 (Table 14) are higher in some cases than those specified in SANS 50256-2 (Tables 4 and 7) [the comparison being made after the conversion of fixture units to flow rates]. For designs, based on SANS 10252-2, which include opposing branch pipes having a nominal diameter of 100 mm, a degree of cross flow will occur. For this reason branch pipe/connection flow rates for 100 mm diameter opposing branch pipes for the ball and Sovent branch fittings must be limited to the maximum permitted pipe flow rates specified in SANS 52056-2/EN 12056-2

Hydraulic performance-Sovent branch fitting’s stack flow capacity

Satisfactory The use of Sovent branch fittings in stacks allows the design capacity of 110 mm primary ventilated stacks to be increased to 7.6 litres per second without the need for additional ventilation, provided that the design is in accordance with Geberit’s recommendations that include:

a Sovent fitting being installed at each floor above ground level (even if no appliances are connected)

a pressure relief line being installed at the bottom of the stack

fixtures at the bottom of the stack must be connected to the pressure relief vent and not to the Sovent stack

Hydraulic performance-offsets in wet portions of discharge stacks

Satisfactory The recommendations made by Geberit with respect to stack offsets are acceptable. However, offsets for other stack types must comply with the requirements of SANS 52056-2/EN 12056-2, which are similar to those specified in SANS 10252-2

SANS 52056-2 /EN 12056-2: Gravity drainage systems inside buildings – Sanitary pipework, layout and calculation

SANS 10252-2: Water supply and drainage of buildings – Drainage installations for buildings.


Table 2: Performance (continued)

Adequacy and provision for pipe expansion and contraction

Satisfactory The recommendations made by Geberit with respect to accommodating pipe expansion and contraction must be adhered to

Embedment of pipework in concrete

Satisfactory

The performance of portions of the Geberit system embedded in concrete will be satisfactory provided that:

sufficient anchoring is provided to prevent relative movement between pipe-work and concrete, as per Geberit’s guidelines

the expansion and contraction forces created by thermal movement are accommodated by the concrete

non-tension resistant couplings such as ring seal and expansion socket couplings are not used

special attention is given to the provision of access to the drainage system as a whole, in accordance with the guidelines as specified in Clause DN4 of SANS 52056-2/EN 12056-2. Access is required to enable effective cleaning and testing of the system, especially any portion permanently embedded in concrete

the proposed embedded portion of the drainage system is tested for water ingress in the assembly shop when pre-assembled or in situ when joints are made on site (in situ testing to be carried out prior to concrete embedment)

Rigid installation and design of fixings

Satisfactory The forces exerted on pipe supports, anchors and the structure by rigid installations must be accommodated. Rigid fixings are not considered suitable for pipes over 160 mm in diameter. Guidance on the load exerted by rigidly installed pipe-work on fixings is available from Geberit or could be calculated by a competent person


Strength of components and durability

Satisfactory Pipe fittings, adaptors, Sovent branch fittings and access pipes meet the requirements of SANS 8770/ISO 8770.

HDPE will not be adversely affected by chemicals typically encountered in domestic, commercial and public buildings. HDPE’s performance will not be adversely affected by exposure to ultra-violet light. The Geberit system must not be used where effluent temperatures consistently exceed 80°C.

It is recommended that in commercial buildings, exposed pipe-work be protected from impacts from vehicles, fork-lift trucks, etc.

Adequacy and provision of joints

Satisfactory Joints will remain watertight under normal drainage conditions. It is recommended that joints be made under controlled conditions in accordance with Geberit’s recommendations and by persons trained in making joints, especially butt welds and electro-fusion joints

Ease of installation

Satisfactory Installation of the systems will be achieved easily provided that procedures prescribed by Geberit are strictly adhered to

Ease of maintenance

Satisfactory Provided access to pipes and fittings is provided in accordance with the requirements of SANS 52056-2/EN 12056-2, blockages will be readily cleared. In the event of alterations or maintenance, sections of pipe-work can be readily removed and replaced

Performance in fire

Satisfactory As is the case with most other plastics, Geberit HDPE pipes and fittings are combustible and may ignite and burn when exposed to fire.

An effective fire damper must be installed when pipe-work penetrates a fire division or compartment

Table 3: Quality management system


Opinion of Agrément South Africa Explanatory notes

Quality management

system

The certificate holder’s quality management system complies with Agrément South Africa’s requirements. Properly applied, it will ensure that quality in the manufacture and installation of drainage systems will be maintained consistently.

Agrément South Africa’s requirements are based on SANS 9001

SANS 9001 ‘Quality management systems – Requirements’

SANS 8770/ISO 8770: Plastics piping systems for soil and waste discharge (low and high temperature) inside buildings – Polyethylene (PE)


PART 3: TECHNICAL DESCRIPTION

General description

The Geberit Above Ground Soil and Waste Drainage System

incorporates pipes, adaptors and fittings, including the Geberit Solvent

manufactured from high-density polyethylene (HDPE). The system is

used for the conveyance of sewerage that is below 80 °C, from domestic,

commercial and public buildings.

Pipe and fitting manufacture

Pipes, adaptors and fittings are manufactured from black PE80 HDPE to

meet the requirements of SANS 8770: 2008.

Pipes are extruded from batch- mixed raw materials in diameters

varying from 32 to 315 mm. Following extrusion pipes are tempered by

being stored for a period in a hot water bath. Pipes are supplied in

standard lengths of 5 m. Fittings and adaptors are injection moulded or

produced by welding pipe sections together, while Geberit Sovent

fittings are blow moulded.

The Geberit range of pipes and available pressure classes are indicated

in Tables 1 and 2, respectively, while the Geberit range of fittings are

indicated in Table 3.

Typical Geberit fittings

SANS 8770: Plastics piping systems for soil and waste discharge (low and high temperature) inside buildings – Polyethylene (PE)


Geberit Sovent branch fitting

Delivery and site handling

No special precautions are needed when delivering pipes and fittings,

however, pipes should be stored in stacks not more than 1 m-high and

away from heat sources to avoid distortion.

Design of drainage systems

Systems are to be designed in accordance with the requirements of

SANS 10400–P Drainage and SANS 10252-2: single stack systems or

unvented one-pipe systems (with cognisance being taken of reduced

maximum flow rates in branch pipes as per SANS 52056-2/EN 12056-2:

single discharge stack with unvented discharge branches) applicable to

100 mm diameter opposing branch pipes at ball fittings and Sovent

fittings.

A major element of the Geberit system is the Sovent branch fitting,

which is designed for a primary ventilated stack/single stack in a

configuration as shown in Figures 1 and 2 below.

SANS 10252-2 Water supply and drainage of buildings – Drainage installations for buildings.

SANS 10400–P Drainage: The application of the National Building Regulations


Figure 1: Typical installation with Sovent fittings on a single stack system (left) versus a conventional ventilated system

Figure 2: Typical installation with Sovent fittings on a single stack system feeding into a sewer drain/ground pipe on the bottom left side

Offsets in wet portions of a discharge stack should be avoided, however,

if unavoidable, recommended details are given in the figures below, i.e.

for offsets smaller than 1 m - Figure 3(a) - and for offsets larger than 1m


- Figure 3 (b). Where offsets for other stack types are proposed, the

requirements of SANS 52056-2 are complied with.

(a) (b)

Figure 3: Geberit’s guidelines for offsets in a Sovent stack

The average linear expansion/contraction coefficient applicable to

Geberit HDPE pipework is 0.2 mm/m/°C, as such drainage systems must

be designed for movements or forces associated with temperature

changes.

Pipes may be supported on rigid fixings designed to carry expansion

forces, however, rigid fixings are not considered suitable for pipes over

160 mm in diameter.

Two methods are recommended to accommodate thermal expansion

and contraction of pipe-work: the deflection leg and the expansion

socket methods, as shown in Figures 4, 5(a) and 5(b) below. Detailed

instructions are provided in Geberit’s installation manuals.

SANS 52056-2/EN 12056-2: Gravity drainage systems inside buildings – Sanitary pipework, layout and calculation


Figure 4: The deflection leg method to deal with pipe

expansion

Figure 5 (a): The expansion socket method to deal with pipe

expansion


Figure 5(b): The expansion socket method to deal with pipe

expansion. Marking on the socket ensures correct insertion

depth i.e. insertion depth according to temperature at the time

of installation

Expansion sockets can accommodate movement caused as a result of a

temperature difference of 80°C over a length of 6 m. Expansion sockets

must be used in conjunction with rigid fixings.

Geberit pipes are often embedded in concrete as would be the case

when cast into floor slabs as indicated below.

Figure 6: An example of a Geberit HDPE drainage system to be embedded in a concrete floor before concrete casting. (Pipes are

installed, (fixed on grade) after the installation of bottom reinforcement. The embedded portions of the drainage system are

tested for water ingress in the assembly shop or, where joints are to be made on site, in-situ prior to placing of concrete.)


As adhesion between the concrete and the surface of pipes is

inadequate to prevent pipe movement due to temperature change,

shear stress development at branch fittings could result in damage. It is,

therefore, a requirement that pipe-work be anchored on each side of

fittings to the encasing concrete. Such anchorage can be effected by

means of electro-welded sleeves or bushes. Expansion or contraction

forces resulting from such anchorage must be accommodated by the

concrete. Ring seal and expansion socket couplings must not be used on

pipe-work embedded in concrete.

Special attention is given to providing access to the drainage system as a

whole (including sections of the system permanently embedded in

concrete) in accordance with the guidelines specified in Clause ND 4 of

SANS 52056-2/EN 12056-2, to enable the effective cleaning and testing

of the system.

Technical support and training

Technical support is available from Geberit’s offices in South Africa while

product guides and installation manuals may be down-loaded from

Geberit’s websites. Training is also provided by Geberit’s staff on system

installation and joining procedures.

Installation

Various options are available for pipe and fitting joining. The type of

joint specified will depend on:

the method of installation;

space available to make the joint and to accommodate other

services;

whether or not the joint is subject to tensile forces.

As HDPE melts at approximately 220°C, welding techniques such as butt

welding and electro-fusion/electro-welding may be successfully carried

out. Welding tools and training are available from Geberit.


Joint types and applicable applications are indicated in Figures 8 and 9

below:

Figure 7: Geberit joint types

Figure 8: Applications of Geberit joint types

Maintenance

HDPE pipes and fittings do not require to be protected from solar

radiation; painting of pipes and fittings is not recommended.

Blockages may be readily cleared using standard pipes cleaning

equipment. If necessary, sections of pipe can be readily removed and

replaced.


Table 1: Geberit standard pipes for waste and drainage pipe systems

(excerpt from “Geberit HDPE Piping Systems Catalogue 2011/2012” document)

Table 2: Geberit standard pipes for waste and drainage pipe systems indicating pressure classes i.e. PN values in bar

(excerpt from “Geberit HDPE Application Technique” document)


Table 3: Geberit fittings; adaptors; Sovent branch fittings; access pipes; electrofusion tapes and sleeves; and anchor brackets (sanitary systems)



Table 3 (Continued): Geberit fittings; adaptors; Sovent branch fittings; access pipes; electrofusion tapes and sleeves; and anchor brackets (sanitary systems)


Agrément Certificate 2011/392 - agrement.co.za · Agrément Certificate 2011/392: Geberit soil and...

Documents

Transcript of Agrément Certificate 2011/392 - agrement.co.za · Agrément Certificate 2011/392: Geberit soil and...