Low hydrogen, non-vacuum packed SMAW consumables shall be dried and stored in ovens prior to issue to ensure that they are capable of meeting a maximum hydrogen level of 153 oz H2/100lb (10ml H2/100g) weld metal prior to commencing welding. Electrodes shall only be issued for use in portable electrode ovens capable of maintaining a temperature of 160°F (70ºC) minimum. After use, any remaining electrodes shall be re-dried in accordance with the manufacturer’s recommendation. Electrodes shall only be re-dried twice before being discarded