New progress in the pre-installation of the ground of Dalian Shipai main pipe system

In order to improve the internal and external quality of the mainframe and implement the concept of clean machine, Dalian Shipai actively promoted the expansion of the main pipe system. Recently, new progress has been made in the ground prefabrication of the 6G70ME-C#31 main pipe system.
New progress in the pre-installation of the ground of Dalian Shipai main pipe system
In the past, the installation procedure of the exhaust side piping system of the main engine was: firstly, the pipe brackets were assembled one by one to the scavenging air box body, and then the pipe fittings were assembled one by one to the pipe brackets according to the drawing sequence. Four brackets and six pipe fittings are installed, and the crane is required to be transported back and forth 10 times. Each lifting assembly process requires the construction personnel to move back and forth on the scavenging air box, command and adjust the crane, determine the positioning size, and finally complete the assembly.
This construction method not only has a long assembly cycle and a long time for occupying crane resources, but also has potential safety hazards. To this end, the assembly technicians conduct on-site ground pre-installation feasibility analysis, prepare planning plans, refine the process division, and improve the piping assembly process. On-site guidance to the construction personnel, in accordance with the assembly process rules, after the line is positioned on the ground, the pipe bracket, pipe fittings and valve parts are accurately assembled and assembled one by one, and then hoisted. Not only greatly saves the crane resources, but also shortens the piping assembly cycle and effectively prevents the paint from being damaged due to bumping during the assembly process, ensuring the quality of the pipe fittings, and also reducing the installation of the large pipes on the cylinders one by one. Security Risk.
In order to meet the requirements for the expansion of prefabricated construction nodes on the ground of the pipeline system, the company has set up a prefabricated area for pipe fittings in the second district of the assembly and manufacturing department, and proposed regional palletization supply requirements for suppliers, clearly identifying the contents and storage status, and preventing construction workers. Because the workpiece is found or the quality of the pipe is affected by the secondary landing. Next, the company will further promote the expansion of the prefabrication of the pipeline system and gradually extend the accumulated experience to the pre-installation of components such as the platform support.

Our Quick Release are used for pipe connection,especially for the Dredging pipe.

Dredge pipe pieces are a variety of pipes on board of dredgers like bend pipe, T-pipe, pitched T-pipe, Y-pipe, cross pipe, strait pipe, and conical pipe.


These dredge pipe pieces are used on-board of dredgers to connect the Dredge Pump with the discharge pipe.

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Mostly the pipes are made from cast steel. Sometime Welded Pipes are used.


Dredge pipe pieces may have different thicknesses, shapes and lengths, they are also provided with lifting lugs for easy handling. They supposed to have smooth surface for low frictions. In most cases the flanges are cast together with the pipe to provide a stronger connection between flange and pipe.


It is also very important that the entire dredge pipe pieces to follow the shape of the flow resulting in low frictions and to avoid vortexes.

The materials used to manufacture the dredge pipe pieces are both manganese alloy that provides high elongation and impact value or high chromium, nickel and molybdenum alloy that gives high yield, high tensile and very high hardness values.

Unisite information



UniSite group was established in a strategic location, Chinese second largest port, Ningbo, which is characterized by visible leadership, vitality, innovation, long-term vision and a sound financial position.

As an international partner, we are specialized in providing comprehensive service of dredging, land reclamation, offshore projects, marine engineering, municipal engineering and environmental remediation projects.

Besides our own production base and technology system, we also have strategic partnerships with DONGPENG shipyard, a leading producer of chemical vessels in China.

The group has a perfect managing system and our staff who are professional in technology are committed, passionate, efficient. Thanks to the knowledge, the experience and the skills of our work team, we are able to offer our client best possible and most sustainable solutions to their requirement. We are one of the leading steel parts and service providers for dredging and marine engineering in China.

UniSite culture consists of corporate values, corporate philosophy and behavior shaping, which is the core of responsibility and breakthrough. Based on this core, with professionalism, vitality, innovation, respect, team spirit, UniSite culture is continuously developing, along with our company from its foundation.

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