Installation of underwater pipeline sealing airbags

Jiangsu Henglong Underwater Engineering Co., Ltd. has been engaged in underwater sealing for many years and has rich experience in underwater sealing. If needed, we can serve you.

Jiangsu Henglong Underwater Engineering Co., Ltd. welcomes you to visit: Underwater Sealing Unit!Installation of underwater pipeline sealing airbags - Diver construction teamThe company will wholeheartedly provide you with services at more favorable prices. Our company has offices throughout the country: East China, South China, Central China, North China, and Northwest regions. We can meet the needs of your company and arrive on site on the day of receiving the call, providing satisfactory construction plans and product quotations. We hope to have a pleasant cooperation with your company and achieve mutual benefits!

First look, second touch, third try: First look at the surface of the airbag. Generally speaking, a good water blocking airbag surface should be slightly rough and even, with a smooth surface and no significant bumps or depressions. The second touch is to check whether the surface of the airbag is slightly rough and flat, whether there are sharp protrusions, and whether it is firm and powerful when pressed down. The three tests refer to the inflation test of the airbag at the rated high pressure. In the open state, the airbag is inflated by 1/6 and checked for any leaks with soap water. At 1/3 of the rated pressure, the airbag is observed at a distance to see if there are any cracks.

The sealing of sewage pipelines is based on the actual pipeline situation and the relevant water flow intensity inside the pipeline. In order to avoid the water pressure generated by upstream water accumulation after a long sealing time, which may pose a certain threat to downstream construction personnel, the distance of sealing is determined according to the actual situation. The sealing is carried out at each inlet of the upstream and intersecting wells first. Before sealing, the manhole cover within the scope of the construction section should be opened and a protective fence or conspicuous sign should be placed. Gas detectors should be used to detect the gas in the well to ensure that there is no toxic gas before proceeding with the well sealing. If necessary, oxygen must be prepared for construction.

Pipeline water blocking airbags are increasingly recognized by construction companies and municipal pipeline maintenance and construction companies due to their convenient use and low long-term cost. However, there are many brands of water blocking airbags in the market, with varying numbers and quality, making it difficult for users to distinguish. Based on the above situation, the author summarizes various experiences and draws the following points for discussion and reference by friends in the construction and municipal construction industry. We also ask for criticism and correction from friends in the industry.

The installation of airbags in sewage pipelines and underground installation of municipal pipelines requires experienced construction companies. If the airbags are not installed properly or installed incorrectly, it is likely to cause economic losses to the owners, and in severe cases, there may be casualties. Therefore, Henglong Company is selected for underwater installation of airbags. Henglong Company has rich experience in installing airbags and bears construction risks.

1、 Blocking content

At the intersection of Jiefang Road and Daqing Road, for the construction of connecting sewage pipelines, it is necessary to first seal the underground sewage pipelines of the two roads. Considering the water depth of the pipelines in the well, the risk of biogas poisoning due to lack of ventilation, and the existence of safety hazards, divers will be used to install airbags underwater to seal the pipelines.

2、 Sealing method

1. Professional divers wear MZ300 light diving helmets with intercom and air compressor supply equipment to enter the pipeline and install airbags for water blocking construction.

During this period, two diving signalers were stationed at the wellhead to monitor the diving workers inside the well, and one telephone liaison officer used an intercom to keep in touch with the diving workers at all times and pay attention to their movements.

3. After the installation of the water blocking airbag is completed, close the airbag inflation valve tightly. Inflate the air pressure to 0.035.

3、 Construction equipment personnel

MZ300 diving helmet and intercom phone

2. Diesel engine powered air compressor

3. Diving gas supply pipe 100m, one set of wet and dry diving suit

4. One set of backup diving equipment

5. Two professional divers

6. Two signalmen

7. One assistant

4、 Sealing material

1. One water blocking airbag

2. Inflatable tube 30 meters

5、 Safety emergency measures

1. Each diving operation team and project leader have dedicated telephone operators, signalers, emergency divers, and personnel in each position are responsible for preparing emergency divers for standby diving. When an underwater diver is found to be abnormal, immediate rescue should be carried out underwater.

2. Hold a pre shift meeting before each diver goes into the water, mainly regarding diving safety. How to disclose the construction work to each person.

When divers have a cold or other physical discomfort, they are strictly prohibited from diving work.

4. When divers enter the water and encounter situations that do not match the original estimate or the working environment information provided by the previous diver, they should immediately communicate and report to the surface and shore telephone operators for decisive handling. If it affects the safety of construction, the diving can be interrupted until the dangerous situation is eliminated before continuing the diving operation.

Airbag underwater sealing: Without water flow, there is no incoming water in the upstream of the pipeline, and the water level does not change after sealing. Airbag sealing can be used due to its construction characteristics, fast speed, and easy removal. It is recommended to use temporary sealing within 5 hours.

Installation of underwater pipeline sealing airbags - Diver construction teamChoosing Henglong Company is an irreversible choice for you. Not all divers are elite divers. Introduction from Jiangsu Henglong Underwater Engineering Co., Ltd. After more than ten years of hard work, our company has become an industry enterprise and has participated in major water project construction multiple times. We have gone to Mumbai, Cameroon, Eritrea and other places in Africa for technical cooperation. Our company has learned from the experience and lessons of several domestic diving companies in our operations, and our company's mission is to focus on customers and be honest!