ISO 6182-16:2020 pdf free.Fire protection – Automatic sprinkler systems Requirements and test methods for fire pump relief valves.
An assembled fire pump relief valve with the sealing assembly blocked open shall withstand, without rupture, an internal hydrostatic pressure of four times the rated working pressure for a period of 5 mm when tested as specified in 64.
If the test is not performed with standard production fasteners, the supplier shall provide documentation showing that the calculated design load of any fastener, neglecting the force required to compress the gasket, shall not exceed the minimum tensile strength specified in ISO 89 8-1 and ISO 898-2, when the valve is pressurized to four times the rated working pressure. The area of the application of pressure shall be calculated as follows.
a) If a full-face gasket is used, the area of application of pressure is that extending out to a line defined by the inner edge of the bolts.
b) If an “O”-ring seal or ring gasket is used, the area of application of force is that extending out to the centreline of the “O”-ring or gasket.Production testing and quality controlIt shall be the responsibility of the manufacturer to implement and maintain a quality control programme to ensure that production continuously meets the requirements of this document in the same manner as the originally tested samples.Every manufactured valve shall pass a hydrostatic body test for a period of not less than 1 mm at twice the rated working pressure without leakage.Following the hydrostatic body test in 5.2, every manufactured valve shall pass an operation test for correct functioning. The valve shall be set at a predetermined pressure. The pressure shall be slowly increased until the valve opens. The valve shall open at a pressure not less than the set pressure, nor more than 105 % of the set pressure.Every manufactured valve shall withstand, without leakage at the valve seat, an internal hydrostatic pressure of 90 % of the maximum set pressure rating for a period of not less than 1 mm. There shall be no leakage through the body, or past the seat, and no distortion of the valve.
Install an assembled valve including the main valve, pilot valve and trim in a pressure test apparatus with the sealing assembly in the open position. Apply hydrostatic pressure of twice the rated working pressure for a period of 5 mm and inspect the valve during this time for signs of leakage. The valve shall conform to the requirements of 4.8.1.Fill the upstream end of the assembled valve with water, while keeping the sealing assembly closed by the application of pressure on the appropriate devices and parts. Isolate these, if necessary, from the downstream end of the valve and keep this end vented.Increase hydrostatic pressure to the upstream end from 0 % to 90 % of the set pressure at a rate not exceeding 0,14 MPa/min (1,4 bar/mm). Maintain this pressure for 5 mm. Examine for leakage. The valve shall be tested for leakage at both the minimum and maximum set pressure limits. The valve shall conform to the requirements of 4.8.2.For the purpose of this test, production bolts, gaskets and seals may be replaced by components capable of withstanding the test pressure. The valve inlet and outlet connections and all other openings shall be suitably sealed. There shall be a connection for hydrostatically pressurizing the assembled sample valve set at the inlet connection and a means of venting air and pressurizing fluid at the outlet connection. With the sealing assembly blocked open, the sample valve assembly shall be internally hydrostatically pressurized at four times the rated working pressure, but not less than 4,8 MPa (48 bar), for a period of 5 mm. The valve shall conform to the requirements of 4.5.ISO 6182-16 pdf download.