Minimize on-site welding, installation of ladders for tank inspection and safety barriers.
We received an inquiry from a food company about installing an inspection ladder and safety railing at the top of a tank. Additionally, they would like to weld the cracked area of a frame that has been temporarily repaired for a permanent fix. Issues: 1. The top of the tank is sloped, slippery, and narrow, making it dangerous without safety rails. 2. Accessing the top of the tank is infrequent, occurring only a few times a year for maintenance of the valves located there and during other emergencies, so we want to minimize costs as much as possible. 3. Welding directly onto the tank will cause burn marks on the inner surface of the tank. These burn marks must be removed and cleaned, which incurs additional labor and costs. 4. The working time on-site (downtime) must be minimized as much as possible.
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I proposed to fix the inspection ladder and safety railing to the tank using a double stainless steel band. This allows for a reduction in work time and cost-effective installation. Regarding the welded repair areas, we will conduct a preliminary investigation and carry out construction that minimizes the on-site welding scope while ensuring a permanent solution. Points: 1. Pre-weld the stainless bands for fixing the inspection ladder and safety railing, and secure the bands to the tank with bolts. 2. Select the width and thickness based on strength calculations, and use double bands for safer usage. 3. The cracked repair areas of the frame do not directly contact the tank body, so repairs will be done through on-site welding.
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