Good surface preparation for new construction pipelines is critical is because the life expectancy of 40 years or so. Good surface preparation allows you to apply an extended life coating, with the potential for coating failure nulled.
Pipeline projects are often in very remote locations which will require all equipment to be transported to site. The whole site process, coupled with portability of equipment can be costly along with the restricted access to maintenance and repair equipment. Small delays due to incorrect equipment and long down time can add up to large delays for the completion of the project.
In-field blasting is typically around the piping joints, so the pipeline can be welded on site before it is put in the ground in the case of gas pipelines. The weld needs blasted and the weld margin which is usually a few inches either side of the weld back to the existing coating that was done in the factory, and then we can coat that joint. These pipelines are normally buried, and if there were to be a pipeline failure, it is very expensive to find the leak for a start, and it is also very dangerous to have a leak because it could catch fire and cause an explosion.