Understanding the Fabrication Procedure for Large Site-Built Vertical Steel Tanks

November 9, 2020

Like any other fabrication procedure, the fabrication of large site-built vertical steel tanks requires superior and optimum materials. To ensure such, it is important that all of these undergo an initial inspection, followed by metal preparation and subsequent methods, and lastly quality control examination. To better comprehend such a technical process, here is an overview of the fabrication procedure for large site-built vertical steel tanks.

Pre-Fabrication Procedures

Material Inspection and Storage

The first step out of any large site-built vertical steel tanks is the material inspection and storage. This process guarantees that only qualified materials - those meeting the requirements of technical norms and conditions, local regulations and guidelines - are utilised throughout the entire process. Aside from that, these inspected materials are to be documented in the most detailed manner.

The process of inspection assesses the surface quality, geometric parameters: including but not limited to - shape, dimension and extreme deviations, chemical composition and mechanical features of every material. This is done to assure that the degree of defects in the fabrication procedure is reduced immensely, depending on the standards of the brand. They also undergo stretch, bending, and impact bending tests.

When it comes to the storage and transfer of the materials, safety is of the utmost priority. The primary things they look out for is moisture and mechanical damage. That is why it is highly important to store them in dry warehouses, stockpiled steadily, sorted and marked. It is also important that they remain without contact with the floor.

Metal Preparation

Sheet Metal Flattening - The first step in metal preparation is the flattening of the sheet metal. This particular sheet metal roll is utilised for large site-built vertical steel tank bottoms and shells. They are more susceptible to flattening so it is essential to prepare them to avoid dealing with compression marks, dents, buckles and other damages. Multi roll flatteners with special bending tool are commonly utilised so that the structure and paste-forming properties will significantly improve. After this particular process, the sheet metal will then be inspected for possible external damages.

Sheet Metal Edging - This particular process is done before fabricating and manufacturing coil-able strip panel and before the process wherein the shell plates of the tank are rolled and assembled in the plate-by-plate methods. This is also where the fore and cross-cut edges are being processed.

The importance of sheet metal edging for large site-built vertical steel tanks lie on its ability to clear the unit of any irregularities, barbs or flashes as it guarantees a firm adherence for spare parts to stick to each other in the edge matching. Such would automatically indicate the quality of the joints and whether or not they meet the line dimension and shape requirements as indicated in the design project. Sheet Metal Edging is made possible through-plane milling and end-milling machines.

Contact Details

Fusion - Weld Engineering Pty Ltd
ABN 98 068 987619

1865 Frankston Flinders Road,
Hastings, VIC 3915

Ph: (03) 5909 8218

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