6.12Static long-term testThe compon

6.12Static long-term testThe components (number of test parts = 4) must be filled with test medium and must be deaerated The fittings must be hermetically sealed with plugs and series production clips. The DUTs may be subjected to flow if this is necessary to ensure a constant temperature. The maximum flow rate pet DUT must be agreed with the responsible department prior to starting the test and must be documented using examplesAn erosion within the DUT caused by flow is "not permitted".Test medium: Current coolant additive acc. to TL 774: water = 60:40Test chamber temperature: (135-5)°cInternal test pressure: 2 bar overpressureSequence:Heating cycle: Heat the pressurized components to 135 C, cool them down to room temperature for 170 h, then age them for 1 h at room temperature and replace the used test medium by new one, heat the components to 135 C. check leak tightnessRepeat heating cycle until the component has been loaded for a total of 1 500 h.Afterwards, determine residual loading capacity acc. to the pressure pulse test in Section 6.11, but with the following deviating specifications:Test duration: Stop after 60 000 load cycles or if there are any leaks/through-cracks Requirement: see Table 1, consec. no. 15.