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