ISO 6182-16:2020 pdf download

ISO 6182-16:2020 pdf download.Fire protection — Automatic sprinkler systems — Part 16: Requirements and test methods for fire pump relief valves
1 Scope
This document defines performance requirements, methods of testing and marking requirements for fire pump relief valves intended to rapidly relieve the excessive water pressure in the supply piping for standpipe systems or sprinkler systems or both. Performance and test requirements for other auxiliary components or attachments to fire pump relief valves are not covered by this standard.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 898-1, Mechanical properties of fasteners made of carbon steel and alloy steel — Part 1: Bolts, screws and studs with specified property classes — Coarse thread and fine pitch thread
ISO 898-2, Mechanical properties of fasteners made of carbon steel and alloy steel — Part 2: Nuts with specified property classes — Coarse thread and fine pitch thread
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1 corrosion resistant material
bronze, brass, Monel ® 1) metal, austenitic stainless steel, or equivalent, or plastic material conforming with the requirements of this document
3.2 main valve
part of the valve assembly that controls the flow of water
3.3 maximum set pressure rating
maximum pressure at which the valve is intended to be set to relieve pressure from a water supply system
3.4 pilot valve
part of the valve assembly that controls the operating of the main valve (3.2)
3.5 rated working pressure
maximum service pressure at which a valve is intended to operate
3.6 reseat pressure
pressure at which the relief valve is intended to prevent the flow of water
3.7 set pressure
pressure at which the main valve (3.2) is intended to start to allow the flow of water
4 Requirements
4.1 Nominal sizes and tolerances
4.1.1 The nominal size of a fire pump relief valve shall be the nominal diameter of the inlet and outlet connections, i.e. the pipe size for which the connections are intended. The sizes shall be 20 mm, 32 mm,40 mm, 50 mm, 65 mm, 80 mm, 100 mm, 125 mm, 150 mm, 200 mm, 250 mm or 300 mm. The diameter of the waterway through the sealing assembly seat ring may be no more than one size smaller than the nominal size.
4.1.2 Unless otherwise noted in a specific clause of this document, tolerances shall be in accordance with Annex A.
4.2 Connections
4.2.1 All connections shall be designed for use at the rated working pressure of the valve.