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Ball valve tests are carried out in accordance with the requirements specified in the PN-EN 12266-1:2007 standard ("Industrial valves – Pressure tests, test procedures and acceptance criteria – Mandatory requirements") and, depending on their intended use, in accordance with the requirements specified by the Oil and Gas Institute in Krakow – requirements specified in the Technical Criteria, Technical Approval, and relevant standards. All valves (100%) are subjected to the following pressure tests, using a fluid (liquid or gas) at a temperature of ~20°C.
Liquid strength test at a test pressure of 1.5 times the maximum allowable pressure, PS. This test is also an external tightness test.
Liquid tightness test at a test pressure of 1.1 times the maximum allowable pressure, PS, or gas tightness test at a test pressure of 6 bar (performed mainly for gaseous working media). The tightness of the closure is checked in both flow directions. No signs of leakage are permitted in the tested valves. Leakage rate during the closure tightness test: A according to PN-EN 12266-1:2007. NOTES: 1) Ball valves for petroleum media (crude oil, oils, kerosene, gasoline) meet the requirements of the PN-EN 12569:2002 standard "Industrial valves - Valves for the chemical and petrochemical industries - Requirements and testing."
MARKING OF BALL VALVES ON THE NAMEPLATE
BALL VALVES INCLUDE THE FOLLOWING FEATURES IN THE MARKING:
trademark
catalog number of the tap
nominal size DN
PN value - maximum permissible pressure PS [bar]
maximum permissible temperature (temperature range) TS [°C]
hull material - serial number (including year of production)
KJ quality control mark
other requirements specific to the tap's intended use, such as:
The "CE" mark confirming the valve's compliance with the requirements of DIRECTIVE 97/23/EC may be supplemented with the identification number of the notified body – see Tables 1 and 2 on page 5. This applies to valves for use in gas distribution networks according to PN-C-04750:2011. It may be placed outside the rating plate or on the packaging or on a document accompanying the product (e.g. Declaration of Conformity), depending on technical possibilities. Other additional markings related to the special requirements of the ordering party may be placed outside the rating plate.
