Deyang natural gas maintenance time limit must be reached within 24 hours. Generally speaking, natural gas companies must arrive within 24 hours after receiving the repair report from users. In another special case, it takes 10 minutes to 30 minutes to arrive. In case of failure of gas facilities, such as gas leakage, fire and explosion, leave within 8 minutes, arrive at the site within 30 minutes, deal with it within 3 days, and resume gas supply. If the indoor gas facilities fail, the maintenance personnel will make an appointment to go to the door for treatment within 24 hours, and the treatment will be completed within 48 hours.