The gas pipe shall be inspected regularly to remind the owner to install the gas alarm

1. Leakage inspection of underground gas pipelines shall comply with the following provisions:

1. High pressure and secondary pressure pipe shall not be less than 1 times per year;

2. PE tube and medium pressure steel tube without cathodic protection shall not be less than one time every two years;

3. Cast iron pipes and non-cathodic protection of medium pressure steel tubes, shall not be less than 2 times per year;

4. The newly ventilated pipe shall be inspected within 24h and shall be re-examined for the first week after ventilation.

The cathodic protection system of the gas pipeline shall be tested regularly and shall be well documented; The testing period and contents shall meet the following requirements:

1. Sacrificial anode cathodic protection system, plus current cathodic protection system detection is not less than 2 times per year;

2. The detection of electrical insulation device is not less than one time per year;

3. The cathodic protection power supply detection is not less than 6 times per year, and the interval time is no more than 3 months.

4. Cathode protection power output current and voltage test are not less than 5 times per day;

3. The anti-corrosion coating of the pipeline shall be tested regularly and shall meet the following requirements:

1. Under normal circumstances, the pressure and secondary pressure pipeline shall be conducted 1 times every 3 years. The pressure pipe shall be 1 times every 5 years, and the low-pressure pipeline shall be carried out once every 8 years;

2. After 10 years of the above pipeline operation, the detection cycle is 2 years, 3 years and 5 years respectively;

4. Operation and maintenance of high voltage or secondary high voltage equipment shall meet the following requirements:

1. After 12 months of operation, high pressure or sub-high pressure regulating device and related equipment should be serviced.

2. After maintenance, the system must be operated for no less than 24h or less than one month before it can be turned into a standby mode;

3. The voltage regulator, safety valve, quick cut and other auxiliary equipment should be checked and checked in the set numerical value.

4. Periodic inspection of pressure and pressure on the pressure of pressure and pressure of the pressure station should be made on a regular basis, and no less than one time per week;

5. The electric, pneumatic and other power system should be checked every six months. When the pneumatic system is supplied by high pressure bottled nitrogen, the number of checks should be increased to one per week.

5. The gas supply unit shall conduct regular inspection of the gas users´ facilities and promote the safety of users, and shall comply with the following provisions:

1. The annual inspection of non-resident users, such as commercial users, industrial users and heating, shall not be less than 1 time;

2. For the resident users, every two years check must not be less than one time, remind the user to install the gas alarm, and find that the alarm device can call the gas company to deal with the fire, and avoid the occurrence of fire.