Natural gas pipeline refers to the pipeline that transports natural gas (including associated gas produced in oil field) from the production site or treatment plant to urban gas distribution center or industrial enterprise users, also known as gas transmission pipeline. Using natural gas pipeline to transport natural gas is a way to transport natural gas on land. Natural gas pipelines account for about half of the world’s total pipelines.
- I. Common Safety Problems
- Ⅱ. Preventive and control measures
I. Common Safety Problems
In the construction process of general natural gas pipeline, there are some safety problems in environment, construction and management, and these three potential safety hazards will be explained in detail.
1. Environmental factors
The main potential safety hazard in the environment comes from the destruction of soil structure caused by the excavation of pipelines, which leads to a higher degree of soil looseness. In addition, the stacking of solid waste at the construction site, the noise in the construction process, the emission of harmful gases and so on. If bad weather or natural disasters, such as earthquakes, floods, debris flows, are encountered in the construction process, it will cause secondary damage to the already fragile soil, and will increase the difficulty of construction, threatening the personal safety of construction personnel.
2. Construction factors
The state has formulated a set of relatively perfect construction standards for natural gas pipeline engineering, which involves specific construction technology, construction technology, operation process, etc. It can be used as a reference basis for each construction unit in the actual construction process, and can effectively ensure that the potential safety hazards are minimized. However, many enterprises fail to clarify these indicators to technicians in the construction process, resulting in frequent irregular construction, or lack of comprehensive consideration of the overall project, resulting in omissions on some details, which will bring some potential safety hazards to the follow-up construction process.
3. Management factors
According to the survey, more than half of natural gas pipeline accidents are caused by poor management in the construction process. The level of management has a direct relationship with the quality of the project, and directly determines the safety factor of the construction site. Management involves all aspects of construction, from the management of construction materials, machinery and equipment to the management of construction personnel, we should pay more attention. If any one of the management is not in place, it may lead to safety problems on the construction site, especially the electricity problem on the construction site, which is closely related to the personal safety of the site personnel. It is a arduous and complicated task to manage all the elements in the whole process of natural gas pipeline construction. The most common safety problems are as follows:
(1) Safety measures are not in place
In the construction under ditches, if the working surface is not thoroughly cleaned, or the safety measures such as escape ladders, protective nets are not placed correctly, or the lack of enclosure, it may cause pipe rolling accidents.
(2) Negligent management of electricity consumption
In the process of pipeline construction, it is necessary to inspect the distribution equipment regularly. If the equipment fails and is not repaired in time, it is very likely to cause short circuit or leakage. In addition, if the site line is unreasonable, it is easy to cause short-circuit, the direct consequence of short-circuit is to burn down electrical equipment, and even cause explosions and fires.
(3). Management of Dangerous Goods
In the pipeline construction process, the following inflammable and explosive materials may be introduced into the site. Attention should be paid to the decentralized handling of these items when they are preserved, and to ensure that the containers for storing these dangerous goods have a good appearance and no damage, otherwise it is very likely to lead to the spillover of the goods. In order to reduce the cost, some construction units use plastic containers to store these chemically prone items without authorization, which may lead to fire and explosion accidents.
Ⅱ. Preventive and control measures
1. Strengthen the training of construction personnel
The construction personnel are the main body of the construction site, the most active factor, and the breakthrough of maintaining the safety of the construction site. Therefore, the primary task is to strengthen the education and management of the construction personnel, improve their safety awareness, so that they can work in accordance with the standard technology in the construction, and avoid accidents in the construction caused by factors considered. Therefore, construction units can use technical training, safety education and responsibility system to manage employees, so that they can continuously improve their operational ability and professional ethics. In the training process, attention should be paid to follow up the training process of construction personnel in real time, so as to adjust their post responsibilities, so that construction projects are not affected by external factors. In addition, construction units must give necessary humanistic care to employees, organize regular physical examinations, and conduct psychological counseling to enhance their work enthusiasm and attention, so as to effectively guarantee the construction efficiency and construction quality.
2. Deepening territorial management
According to the actual situation of the project, it can be divided into specific territorial responsibility areas, and the responsibilities in each area can be refined to specific positions and individuals, so that each employee has its own exclusive responsibility areas, responsible for their own positions, and accept the supervision of others. In daily work, employees should investigate the potential safety hazards in the area they are responsible for one by one, and then report them to the team leader to ensure that on-site risk control measures are in place, and make safety technical submissions.
3. Risk Prevention and Control and Emergency Management
When carrying out high-risk project operations, such as excavation, welding technology of natural gas pipelineand blasting operations, it is necessary to carry out risk assessment and safety analysis, and formulate reasonable construction risk response measures, urge these measures to be implemented, so that each post can clearly define its actual responsibilities, and each employee should put safety awareness first, starting from itself, to ensure the operation ring. Security and stability of the environment. In addition, it is necessary to organize emergency drills regularly so that employees can grasp the response measures in various emergencies and improve their ability to identify and avoid risks.
Source: China Stainless Steel Natural Gas Pipelines Manufacturer – Yaang Pipe Industry Co., Limited (www.yaang.com)