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Product name: Riegler screw connection 331, flat sealing, R 1/2, Rp 1/2, temperature-resistant, black Temperature range: -20 °C to 200 °C, please note the maximum temperature and maximum operating pressure must not occur at the same time Material: black malleable cast iron B350-10, high mechanical strength and standardised connection technology Thread: Rp/R 1/2, thread standard according to ISO 7-1 Compliant with DIN EN 10242 (formerly 2950), classic screw connection series in pipeline construction