Safety technica𒉰l specificat♎ion for drainage pipeline maintenance

1, drainage pipeline maintenance safety te⭕chnical regulations, pipeline i🦋nspection and maintenance work safety

1.1, when carrying out maintenance operations in areas with large traffic flow, special persons should be maintained to main🏅tain t🐷he traffic order and coordinate the safe passage of vehicles.

1.2 when temporary occupying roads are maintained, the protective barriers should be placed before the direction of the vehicle in the maintenance area. For general roads, the maintenance area should be greater than 5m, and the road cone should be set on both sides. The link between the road cones should be connected by a chain or warning band, and the spacing should not be greater than 5m.

1.3 on the expressway, it is advisable to adopt mechanical maintenance methods. In addition to setting up protective barriers, safety warning signs should also be set at the site where the vehicle is not💫 les♓s than 100m.

1.4 when the manhole cover is opened, there m❀ust be someone guarding the site or setti🍌ng up an obvious protective fence and warning sign around the well cover.

1.5 the 𒊎sludge containers and transport vehicles should be provided with safety signs when the roads are parked, and warning lights should be set up at night. After the operation is cleared, the scene should be evacuated in time.

1.6 in addition to working vehicles ꧅and personnel, measures should be taken to prevent othe♐r vehicles and pedestrians from entering the operation area.

2. Open and close the manhole cover.

2.1 special tools should be used for opening and closing manhole covers, and no ꦇdirect hand operation is strictly prohibited𒁃.

2.2 when the manhole covers are opened, they should be placed straight ahead in the direction of the vehicle.  

2.3 when opening the pressure manhole cover, the corresponding explosion protection measures shall 🌺be taken.

3. Pipeline inspection

3.1 when detecting the in🍌ternal conditions of pi💛pelines, it is advisable to adopt CCTV inspection, sonar inspection and portable pipe periscope rapid detection.

3.2 the pipe diameter used for diving inspection shall not be l💜ess than 1.2m, and the flow velocity inside the pipe should not exceed 0.5m/s.

3.3 units and divers engaged in♔ diving operations must have corresponding special qualification.