Ss 608-2015 521u26

SS 608 : 2015 (ICS 23.040.10; 23.040.15; 91.140.40)

SINGAPORE STANDARD

Code of practice for gas installation [Formerly 51]

Published by

SS 608 : 2015 (ICS 23.040.10; 23.040.15; 91.140.40)

SINGAPORE STANDARD

Code of practice for gas installation

All rights reserved. Unless otherwise specified, no part of this Singapore Standard may be reproduced or utilised in any form or by any means, electronic or mechanical, including photocopying and microfilming, without permission in writing from SPRING Singapore at the address below:

SPRING Singapore 1 Fusionopolis Walk #01-02 South Tower, Solaris Singapore 138628 Email: [email protected]

ISBN 978-981-4726-08-5

SS 608 : 2015

This Singapore Standard was approved by the Building and Construction Standards Committee on behalf of the Singapore Standards Council on 8 October 2015. First published as 51, 1990 First revision, 1995 Second revision, 2004 Third revision and renumbered as SS 608, 2015 The Building and Construction Standards Committee, appointed by the Standards Council, consists of the following : Name

Capacity

Chairman

:

Mr Chan Kok Way

Member, Standards Council

Deputy Chairmen

:

Er. Chew Keat Chuan

Building and Construction Authority

:

Mr Larry Ng Lye Hock

Urban Redevelopment Authority

Secretary

:

Ms Jo Ng

Institution of Engineers Singapore – Standards Development Organisation



:

Mr Bin Chee Kwan

National Environment Agency

Ms Barbara Bok Er. Chan Ewe Jin Er. Chee Kheng Chye Mr Chng Chee Beow Mr Dominic Choy Er. Paul Fok Mr Goh Ngan Hong

SPRING Singapore Institution of Engineers Singapore Housing & Development Board Real Estate Developers’ Association of Singapore Singapore Contractors Association Limited Land Transport Authority Singapore Institute of Surveyors and Valuers

Mr Goh Peng Thong Mr Desmond Hill Er. Lee Chuan Seng Mr Benedict Lee Khee Chong Mr Rodney Lee Assoc Prof Leong Eng Choon Mr Darren Lim Dr Lim Lan Yuan Er. Lim Peng Hong Er. Mohd Ismadi Assoc Prof Gary Ong Khim Chye Er. Yvonne Soh Dr Tam Chat Tim Mr Christopher Tan Er. Tang Pei Luen

Individual Capacity Individual Capacity Individual Capacity Singapore Institute of Architects Singapore Manufacturing Federation Nanyang Technological University Building and Construction Authority Association of Property and Facility Managers Association of Consulting Engineers Singapore Ministry of Manpower National University of Singapore Singapore Green Building Council Individual Capacity Singapore Civil Defence Force JTC Corporation

2 COPYRIGHT

SS 608 : 2015

The Technical Committee on Building Maintenance and Management, appointed by the Building and Construction Standards Committee and responsible for the preparation of this standard, consists of representatives from the following organisations: Name

Capacity

Chairman

:

Dr Lim Lan Yuan

Member, Building and Construction Standards Committee

Deputy Chairman

:

Er. Tang Pei Luen

Member, Building and Construction Standards Committee

Secretary

:

Ms Barbara Bok

SPRING Singapore



:

Mr Eric Chan Kim Mun Mr Bernard Cheng Kwang Meng Prof Michael Chew Mr David Goh Mr Goh Sheng Jie Dr Kang Kok Hin Mr Lee Wee Keong Er. Leo Hee Long Mr Lim Chong Yong Dr John Min Er. Ng Eng Kiong Mr Ramahad Singh Dr Sun Qiqing Mr Tan Ann Kiong Er. Roland Tan Juay Pah Er. Yeow Mei Leng

Association of Property and Facility Managers SETSCO Services Pte Ltd National University of Singapore Fire Safety Managers’ Association (Singapore) Housing & Development Board Institution of Facilities Management Singapore Civil Defence Force Energy Market Authority Building and Construction Authority Singapore Institute of Building Limited Singapore Green Building Council PUB, the National Water Agency TÜV SÜD PSB Pte Ltd Singapore Contractors Association Limited Institution of Engineers Singapore Association of Consulting Engineers Singapore

Co-opted

:

Mr Chue Fook Chee

Individual Capacity

Mr K Ramanathan Mr Kua Soo Chong

Individual Capacity Individual Capacity

3 COPYRIGHT

SS 608 : 2015

The Working Group, appointed by the Technical Committee to assist in the preparation of this standard, comprises the following experts who contributed in their individual capacity: Name Convenor

:

Er. Chong Toh Kuan



:

Maj Cheong Yew Dong Er. Chin Terk Chung Er. Chua Hoon San Er. Callan Lam Er. Peter Ng Bee Hock Er. Tong Kok Kwang Mr Too Yew Yong Ms Wan Siew Fung Er. Yeow Mei Leng

The organisations in which the experts are involved are: Association of Consulting Engineers Singapore City Gas Pte Ltd (as Trustee) Energy Market Authority Housing & Development Board Nanyang Technological University Singapore Civil Defence Force Singapore Institute of Architects SP PowerGrid Ltd

4 COPYRIGHT

SS 608 : 2015

Contents Page Foreword

7

1

Scope and application

8

2

Normative references

8

3

Definitions

10

4

Design

13

5

Pipework

14

6

Materials

22

7

Installation

25

8

Testing

25

9

Commissioning

27

10

Inspection and maintenance

28

Annexes A

Typical town gas specifications

43

B

Natural gas specifications

45

C

Purging

46

D

Safety precautions when using gas

47

1

Final pressure test for consumer’s service pipes

26

2

Final pressure test for consumer’s internal pipes

26

3

Proof test for consumer’s service pipes

26

4

Proof test for consumer’s internal pipes

26

Tables

Figures 1

Typical gas installation for a landed residential premises

29

2.1

Typical gas installation in multi-storey buildings – Schematic 1 SV installed in ground

30

Typical gas installation in multi-storey buildings – Schematic 2 SV installed on external face of building

31

3

Typical spool installation

32

4

Typical pipe embedded in channel, apron and concrete floor slab

33

2.2

5 COPYRIGHT

SS 608 : 2015

Page 5

Typical gas riser ducts

34

6

Typical duckfoot riser

35

7

Typical below ground gas installation in retaining and basement walls

36

8

Location of gas installation zones on wall

37

9

Typical gas installation chased in solid wall

38

10

Typical gas pipe installation in walls/partitions

39

11

Typical gas meter installations (residential)

40

12

Schematic layout of a gas interlocking system

41

13

Colour coding for valve and syphon manhole chamber covers

42

Bibliography

49

6 COPYRIGHT

SS 608 : 2015

Foreword This Singapore Standard was prepared by a Working Group appointed by the Technical Committee on Building Maintenance and Management which is under the purview of the Building and Construction Standards Committee. This Code is a revision of 51 : 2004 – ‘Code of practice for manufactured gas pipe installation’ and has been re-numbered as SS 608. In the revision of this Code, the essential requirements for safe and good practice in gas installation work have been emphasised. The title has been changed from “Manufactured gas pipe installation” to “Gas installation” to reflect its application to both town gas and natural gas. Among the changes introduced are providing: a)

requirements for: i) gas pipes to through bedrooms; ii) gas pipes chased in external walls of bedrooms; iii) gas pipes chased in cavity or porous walls; iv) gas appliance commissioning.

b)

a typical example of an installation system requiring the use of ancillaries and interlocking system.

c)

requirements for radiography examination in compliance to API 1104 standard.

d)

requirements for records of reports for testing, commissioning and maintenance to be kept.

e)

updated annexes and illustrating figures.

In preparing this Code, reference was made to the overseas publications given in the bibliography. Attention is drawn to the possibility that some of the elements of this Singapore Standard may be the subject of patent rights. SPRING Singapore shall not be held responsible for identifying any or all of such patent rights.

NOTE 1.

Singapore Standards are subject to periodic review to keep abreast of technological changes and new technical developments. The revisions of Singapore Standards are announced through the issue of either amendments or revised editions.

2.

Compliance with a Singapore Standard does not exempt s from legal obligations.

7 COPYRIGHT

SS 608 : 2015

Code of practice for gas installation 1

Scope and application

1.1

Scope

This Code specifies the essential requirements for the safe and good practices in gas service work. It concerns the gas installation downstream of the gas service isolation valve (GSIV). It is applicable for the conveyance of town gas or natural gas of up to 50 kPa gauge. This Code covers design, materials, installation, testing, commissioning and maintenance of the gas installations and appliances. The Code is applicable to new gas installations as well as addition and alteration to existing gas installations.

8 COPYRIGHT