When self-power is insufficient, seek external support or adopt new equipment and technology. Summary: Each salvage project faces unique situations, and each practice brings you experience and improvement. Regularly gather and organize information, establish a complete technical file after each project completion, summarize lessons learned, reflect deeply, and understand the essence. This manual is divided into ten chapters, mainly covering: qualifications for divers, including requirements, training requirements, qualification and skill requirements, experience record requirements, job responsibilities, and the appointment of dive supervisors; requirements for diving equipment and systems, including diving gear, air supply hoses, air compressors, entry and exit equipment, manned pressure vessels, instruments, and gas storage equipment; operational procedures, focusing on the implementation and enforcement of safety rules during operations; underwater salvage by diving teams refers to the process of recovering submerged objects, which can also be used to clear navigation obstacles in waterways and port areas; underwater salvage design, measurement, diving, sealing, underwater installation, underwater cutting, and underwater welding are highly integrated skills.
Diver Service Company — Welcome! Due to the nature of the work and the特殊性 of the location, the risk factor for underwater recovery is much higher than in ordinary industries, and there are more principles to adhere to and things to be aware of. To ensure the smooth progress of underwater recovery work and the safety of the staff, divers must meet the following requirements: Before formulating a recovery plan, consider the entire project, refine and improve each detail repeatedly, and strive for excellence. The formulation of a recovery plan is a crucial step in underwater recovery, and it must be approached with a rigorous and meticulous attitude, carefully planning each aspect of the work and preparing for unexpected situations. Secondly, there are many unknown factors in the process of underwater recovery operations. When facing these factors, one must maintain a calm and composed demeanor, be well-prepared, and avoid becoming anxious or confused, to prevent unnecessary losses and injuries.
Diver Service Company — As your business continues to grow, some major cities in China are enhancing their infrastructure for public transportation and credibility. This inevitably requires underwater engineering support, such as the construction of large marine aquariums and underwater tunnels. Often, numerous underwater engineers are needed to complete such projects. However, these types of constructions are commonly found in major cities like Beijing, Shanghai, and Guangzhou. Consequently, there is a strong demand for underwater engineering services in these areas. Compared to second and third-tier cities in China, engineering divers must operate strictly in accordance with engineering diving protocols.
Engineering diving is an underwater activity with inherent risks, thus stringent requirements are placed on the technical personnel involved, who must hold an engineering diving certificate issued by the relevant authorities. Recently, many enthusiasts of diving sports have called to inquire about our company's divers, asking whether it is necessary to warm up before diving into the water in late autumn and what the significance of doing so is. Below, our staff will provide the answers. Firstly, warming up before diving in late autumn is one of the strict observances of underwater recovery safety procedures, which holds great significance and role in ensuring safe underwater work. According to the staff, during the late autumn, the water temperature is lower than the air temperature.
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Minglong Company strictly adheres to the "Three Inspections" and specializes in underwater construction, installation, cutting, welding, demolition, leak sealing, and exploration services; diving operations, rescue, recovery, bridge, dock, ship, power plant, waterworks, and wastewater treatment plant underwater inspections, maintenance, and repair construction; reservoir, dam, hydropower plant, gate underwater inspections, maintenance, installation, and reinforcement; surface cleaning, underwater visual, photographic, and video services are our main business.
Primarily handles underwater cutting and welding, underwater sealing, underwater masonry, underwater masonry sealing, underwater bladder sealing, bladder sealing, bladder installation, wastewater pipeline sealing, rainwater pipeline sealing, underwater cutting and demolition, caisson sinking/sealing/bottom cleaning, sacrificial anode corrosion protection construction, underwater concrete pouring, underwater recovery, hydroelectric and water conservancy projects, modular concrete diving construction, underwater pile driving, reinforcement, maintenance, installation, and other underwater engineering projects, underwater bladder installation, pipeline bladder sealing, etc.
It refers to the specialized technique for welding metallic structures underwater. Underwater welding is affected by both water and high-pressure conditions. Therefore, the processes, equipment, and quality requirements for underwater welding differ from those on land. Currently, there are many underwater welding methods, which can be broadly categorized into wet underwater welding, dry underwater welding, and partial underwater welding.
Underwater installation welding, where divers weld directly without any drainage measures. The main issues encountered with this method include poor visibility, difficulty in control, rapid cooling speed, and high hydrogen content, all of which can affect the quality of the weld joints.
The concept of underwater installation welding involves applying various types of water, including to the weld seam, in a dry air cabinet environment. The main issues with this method are: Firstly, there is a large compartment, but its adaptability is poor due to the shape and position limitations of the underwater installation weldment. So far, this method is only suitable for structures like submarine pipelines with specific shapes. Secondly, a complete equipment system is required for maintenance, adjustment, monitoring, lighting, and safety control, which is costly. Thirdly, it still exerts pressure on welding quality, and as the water depth increases, the welding arc is compressed, the arc column becomes thinner, the weld and molten width narrows, the formation of the weld worsens, and defects are more likely to occur.
Underwater construction diving teams for hiring, underwater car recovery, evidence recovery, rescue operations, drowning victim retrieval, valuable item recovery, gate maintenance, cutting, underwater pipeline plugging, underwater wall drilling and reinforcement, recovery of drill bits, sunken ship recovery, underwater obstacle removal, underwater pipeline laying, underwater video recording, and underwater services. Service scope includes reservoir and dam inspection and repair, dock diving inspections, sinking caissons, underwater pipeline descaling, bag concrete, wire saw cutting, bridge cutting, etc. We provide services to a variety of owners and construction companies, including ports, bridges, shipyard dock gates, power plants, reservoirs, wastewater treatment plants, waterworks, chemical plants, refineries, CRCC Bridge Bureau, and municipal engineering projects.
