【In-depth Discussion on Modular Installation in HaiChuan】Future construction sites will see no need for welding; pipes will be prefabricated and installed in a modular manner

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The traditional construction approach involves carrying out all construction tasks at the site of the project. This method results in long construction times, requires significant investment in human and material resources, involves numerous overlapping tasks, and necessitates the construction of many temporary facilities, thus having a considerable impact on the environment surrounding the plant site. Modular welding installation for projects: Project modularization refers to the division of an entire project into multiple modules for manufacturing, based on the factory’s production capabilities and functional requirements. The manufacturing of these modules can take place in one location or in different locations; after being pre-assembled, they are transported via large ships to the site of the project where they are installed and tested. Modularization usually results in costs that are 10%-15% higher than those of building directly at the project site, but it improves the quality of the construction, reduces the construction time, and lowers labor costs, thereby reducing the overall cost of installing the facility. With the continuous improvement in equipment manufacturing capabilities and lifting strength, modular construction is being widely used in special areas and projects. In the future, there will be a continuous decline in the number of welders and plumbers on construction sites; instead, most of these workers will be employed in factories for prefabrication and installation, with over 90% of the work on each module being completed inside the factory. For modular construction in factory settings, since the welding positions are relatively simple yet high precision is required regarding dimensions, higher skills are demanded of welders and pipe fitters.

For transportation, SPMTs (Self-Propelled Modular Transporters) are used. These vehicles are controlled by computers and represent a high-tech product developed on the basis of hydraulic trailers; their wheels are hydraulically driven, allowing for independent steering and height adjustment. There are various steering modes available, and the overall vehicle is highly flexible, enabling the smooth transport of extremely heavy loads even on complex road conditions.

I see that for this set of modules, aside from the cracking module of the ethylene plant on the first floor which is from China and supplied by Huisheng Engineering, the other process and pipeline modules are all manufactured abroad. It is evident that there is still a significant gap between China’s approach to modularity and that of foreign countries, and efforts are needed to catch up.

The core of modularity also lies in “module design”.