AS 1357.1-1992

1 - AS 1357.1-1992 WATER SUPPLY - VALVES FOR USE WITH UNVENTED WATER HEATERS - PROTECTION VALVES
4 - PREFACE
5 - CONTENTS
7 - SECTION 1 SCOPE AND GENERAL
7 - 1.1 SCOPE
7 - 1.2 APPLICATION
7 - 1.3 REFERENCED DOCUMENTS
7 - 1.4 DEFINITIONS
7 - 1.4.1 Auxiliary pressure-relief device
8 - 1.4.2 Normative
8 - 1.4.3 Pressure
8 - 1.4.4 Temperature
8 - 1.5 MARKING
9 - SECTION 2 MATERIALS
9 - 2.1 GENERAL
9 - 2.2 CONTAMINATION OF WATER
9 - 2.3 BODIES AND SIMILAR PARTS
9 - 2.4 SEAT AND DIAPHRAGM MATERIALS
9 - 2.5 SPRING MATERIALS
10 - SECTION 3 GENERAL DESIGN AND CONSTRUCTION
10 - 3.1 GENERAL
10 - 3.2 STRENGTH
10 - 3.2.1 Torque test
10 - 3.2.2 Leakage test
10 - 3.3 END CONNECTIONS
10 - 3.4 VALVE SEATS AND COMPONENTS
10 - 3.5 ADJUSTMENT AND REPAIR
10 - 3.6 FLOW MARKING
10 - 3.7 INSTRUCTIONS
11 - SECTION 4 TEMPERATURE/ PRESSURE RELIEF VALVES
11 - 4.1 GENERAL
11 - 4.2 INLET AND DRAIN CONNECTIONS AND FLOW DIMENSIONS
11 - 4.2.1 Size of connections
11 - 4.2.2 Inlet and drain connections
11 - 4.2.3 Provision for drainage
11 - 4.2.4 Total flow area
11 - 4.2.5 Width of passages
11 - 4.2.6 Minimum orifice
13 - 4.3 VALVE SEAT AND DISC ASSEMBLIES
13 - 4.4 SPRING PRESSURE-RELIEF FUNCTION
13 - 4.5 TESTING
13 - 4.5.1 Selection of valves for type testing
13 - 4.5.2 Test schedule
14 - 4.5.3 Drain lines
14 - 4.6 EASING GEAR TEST
14 - 4.7 AUXILIARY PRESSURE-RELIEF DEVICE
14 - 4.7.1 Rated capacity
14 - 4.8 PRESSURE- RELIEF FUNCTION
14 - 4.8.1 Set pressure
14 - 4.8.2 Preferred set pressures
14 - 4.8.3 Opening pressure test
15 - 4.8.4 Reseating pressure test
15 - 4.8.5 Rated capacity test
15 - 4.8.6 Continued operation (pressure) test
15 - 4.9 TEMPERATURE- RELIEF FUNCTION
15 - 4.9.1 Set temperature
15 - 4.9.2 Opening temperature test
15 - 4.9.3 Reseating temperature test
15 - 4.9.4 Continued operation (temperature relief) test
15 - 4.9.5 Water discharge capacity (temperature relief) test
15 - 4.9.6 Steam discharge capacity (temperature relief) test
15 - 4.9.7 Reproducibility of thermal relief test
15 - 4.10 MARKING
16 - SECTION 5 EXPANSION CONTROL VALVES
16 - 5.1 GENERAL
16 - 5.2 CONNECTIONS AND FLOW DIMENSIONS
16 - 5.2.1 Size of connections
16 - 5.2.2 Inlet and drain connections
16 - 5.2.3 Provision for drainage
16 - 5.2.4 Total flow area
16 - 5.2.5 Width of passages
16 - 5.2.6 Minimum orifice
16 - 5.3 VALVE SEAT AND DISC ASSEMBLIES
16 - 5.4 SPRINGS
16 - 5.5 TESTING
16 - 5.5.1 Selection of valve for type testing
17 - 5.5.2 Test schedule
17 - 5.6 EASING GEAR
17 - 5.7 AUXILIARY PRESSURE-RELIEF DEVICE
17 - 5.7.1 Rated capacity
17 - 5.8 EXPANSION CONTROL VALVE FUNCTION
17 - 5.8.1 Preferred set pressures
17 - 5.8.2 Set pressure
18 - 5.8.3 Opening pressure test
18 - 5.8.4 Reseating pressure test
18 - 5.8.5 Continued operation test
18 - 5.8.6 Rated capacity test
18 - 5.9 MARKING
19 - SECTION 6 NON-RETURN VALVES
19 - 6.1 GENERAL
19 - 6.2 INLET AND OUTLET CONNECTIONS
19 - 6.2.1 General
19 - 6.2.2 Minimum flow area
19 - 6.2.3 Width of passages
19 - 6.3 SELECTION OF VALVES FOR TYPE TESTING
19 - 6.4 STRENGTH
19 - 6.5 LEAKAGE
19 - 6.6 FLOW RATE AND CLOSING PRESSURE
19 - 6.6.1 Flow rate test
19 - 6.6.2 Closing pressure test
19 - 6.7 CONTINUED OPERATION TEST
19 - 6.8 ORIENTATION
19 - 6.9 INSTALLATION INSTRUCTIONS
20 - 6.10 MARKING
21 - APPENDIX A - INSTRUMENTATION
21 - A1 GENERAL
21 - A2 FLOWMETER (for use with air)
21 - A3 FLOWMETER (for use with water)
21 - A4 PRESSURE GAUGES (for use with water)
21 - A5 TEMPERATURE-INDICATING DEVICE
21 - A6 STOPWATCH
22 - APPENDIX B - METHOD FOR TORQUE TEST
22 - B1 SCOPE
22 - B2 PRINCIPLE
22 - B3 APPARATUS
22 - B4 PROCEDURE
22 - B5 TEST REPORT
23 - APPENDIX C - METHOD FOR LEAKAGE TEST
23 - C1 SCOPE
23 - C2 PRINCIPLE
23 - C3 APPARATUS
23 - C4 PROCEDURE
23 - C4 TEST REPORT
24 - APPENDIX D - METHOD FOR EASING GEAR TEST
24 - D1 SCOPE
24 - D2 PRINCIPLE
24 - D3 APPARATUS
24 - D4 PROCEDURE
24 - D5 TEST REPORT
25 - APPENDIX E - METHOD FOR RELIEF DEVICE TEST-AUXILIARY PRESSURE
25 - E1 SCOPE
25 - E2 PRINCIPLE
25 - E3 APPARATUS
25 - E4 PROCEDURE
26 - E5 TEST REPORT
27 - APPENDIX F - METHOD FOR OPENING AND RESEATING PRESSURE TEST- PRESSURE-RELIEF FUNCTION
27 - F1 SCOPE
27 - F2 PRINCIPLE
27 - F3 APPARATUS
27 - F4 PROCEDURE
27 - F5 TEST REPORT
29 - APPENDIX H - METHOD FOR CONTINUED OPERATION TEST- PRESSURE-RELIEF FUNCTION
29 - H1 SCOPE
29 - H2 PRINCIPLE
29 - H3 APPARATUS
29 - H4 PROCEDURE
29 - H5 TEST REPORT
30 - APPENDIX I - METHOD FOR OPENING AND RESEATING TEMPERATURE TESTS – TEMPERATURE-RELIEF FUNCTION
30 - I1 SCOPE
30 - I2 PRINCIPLE
30 - I3 APPARATUS
30 - I4 PROCEDURE
30 - I5 TEST REPORT
31 - APPENDIX J - METHOD FOR CONTINUOUS OPERATION TEST- TEMPERATURE-RELIEF FUNCTION
31 - J1 SCOPE
31 - J2 PRINCIPLE
31 - J3 APPARATUS
31 - J4 PROCEDURE
31 - J5 TEST REPORT
33 - APPENDIX K - METHOD FOR RATED WATER-DISCHARGE CAPACITY TEST- TEMPERATURE-RELIEF FUNCTION
33 - K1 SCOPE
33 - K2 PRINCIPLE
33 - K3 APPARATUS
33 - K4 PROCEDURE
33 - K5 TEST REPORT
34 - APPENDIX L - METHOD FOR STEAM DISCHARGE TEST-TEMPERATURE-RELIEF FUNCTION
34 - L1 SCOPE
34 - L2 PRINCIPLE
34 - L3 APPARATUS
34 - L4 PROCEDURE
34 - L5 TEST REPORT
35 - APPENDIX M - METHOD FOR RATED CAPACITY TEST-EXPANSION CONTROL FUNCTION
35 - M1 SCOPE
35 - M2 PRINCIPLE
35 - M3 APPARATUS
35 - M4 PROCEDURE
35 - M5 TEST REPORT
36 - APPENDIX N - METHOD FOR FLOW CAPACITY TEST-NON-RETURN VALVE FUNCTION
36 - N1 SCOPE
36 - N2 PRINCIPLE
36 - N3 APPARATUS
36 - N4 PROCEDURE
36 - N5 TEST REPORT
37 - APPENDIX O - METHOD FOR CLOSING PRESSURE TEST-NON-RETURN VALVE FUNCTION
37 - O1 SCOPE
37 - O2 PRINCIPLE
37 - O3 APPARATUS
37 - O4 PROCEDURE
37 - O5 TEST REPORT
38 - APPENDIX P - METHOD FOR CONTINUED OPERATION TEST-NON-RETURN VALVE FUNCTION
38 - P1 SCOPE
38 - P2 PRINCIPLE
38 - P3 APPARATUS
38 - P4 PROCEDURE
38 - P5 TEST REPORT

Specifies requirements for the design, construction, testing and performance of temperature/pressure relief valves, expansion control valves and non-return valves specifically intended for use with unvented storage water heaters.

This Standard sets out requirements for the design, construction, testing and performance of the following types of water valves of DN 15 minimum size:(a) Temperature/pressure relief valves.(b) Expansion control valves.(c) Non-return valves.The valves specified above (referred to in this Standard as valves) are specifically intended for use with unvented storage water heaters which are required to operate at temperatures-(i) not normally exceeding 85C; and(ii) under emergency conditions, not exceeding 99C.NOTES:1 For valves used with water heaters which are intended to operate at temperatures above 99C (e.g. hot water boilers), see AS 1271.2 The methods of test detailed in the Appendices determine the ability of the water valves specified herein to perform within specified limits of water temperature, pressure and non-return conditions for the protection of unvented storage water heaters.3 Instrumentation requirements are given in Appendix A.

First published as part of AS B271-1968.
Revised and redesignated AS 1357-1972.
Revised and redesignated in part as AS 1357.1-1988.
Second edition 1992.