AS 4796:2016 pdf free.Water supply – Metal-bodied and plastic- bodied ball valves for property service connection.
2.1 SCOPE OF SECTION
This Section specifies requirements for the materials for valve bodies and component paris.
2.2 DEZINCIFICATION-RESISTANT COPPER ALLOY
Copper alloy, regardless of whether it is in contact with water, shall comply with AS 2345.
2.3 STAINLESS STEEL
Stainless steel, regardless of whether it is in contact with water, shall have a minimum pitting resistance equivalent number (PREN) of 22.
NOTE: The PREN may he calculated as INlows: PREN = %Cr + (3.3 x %Mo) + (16 x %N).
2.4 PLASTIC MATERIALS
Plastic materials shall comply with the requirements given in Appendix D.
2.5 CONTAMINATION OF WATER
When tested utilizing a scaling factor of 0.01 for cold water applications, the valves shall comply with the requirements of AS/NZS 4020.
3.1 SCOPE OF SECTION
This Section specifies requirements for the design and manufacture of ball valves. The design criteria of these valves shall be based on a minimum service life expectancy of 50 years.
3.2 ENI) CONNECTORS
3.2.1 Threaded-end connectors
Metallic threaded-end connectors fbr connection to either pipes or fittings shall comply wih AS ISO 7.1 Series R or RP, as applicable.
Non-metallic threaded-end connectors shall comply with the torque requirements of Clause 4.7.
3.2.2 Union-end connectors
Union-end connectors shall comply with AS 3688.
3.2.3 Conipression ends
Ends for connections to copper tubes by compression joint shall comply with the relevant requirements of AS 3688. Ends for connections of polyethylene pipe shall comply with
ASINZS 4129.
3.2.4 Other end connections
Other end connections that are to be used for connecting to other pipe system types shall comply with the requirements of the Standard relevant to the connection end.
3.3 WATER ShUT-OFF DEVICE
The water shut-off device (ball unit) may be of the manufacturer’s own design. If the device is metallic, it shall comply with Clause 2.3.
3.4 OPERATING t1ECHANISNI
Ball valves shall be fitted with an operating mechanism either permanently attached or integral with the operating spindle, or by means of a lock nut or similar locking mechanism.
The operating mechanism shall clearly indicate the valve open position.
Metallic operating mechanisms (including retaining nuts) shall comply with either Clauses 2.2 or 2.3.AS 4796 pdf download.