Yes, it is possible to use a verified welding procedure specification (WPS) for welding both steel tanks and aluminum tanks. However, it is important to note that welding steel and aluminum requires different techniques and procedures due to the differences in their physical properties.
When welding steel, the WPS should be tailored to the specific grade of steel being welded, the thickness of the material, and the welding position. The WPS should also take into account the welding process being used, such as shielded metal arc welding (SMAW), gas tungsten arc welding (GTAW), or gas metal arc welding (GMAW).
When welding aluminum, the WPS should also be tailored to the specific grade of aluminum being welded, the thickness of the material, and the welding position. The WPS should also take into account the welding process being used, such as GTAW or GMAW, as well as the use of specialized equipment such as a high-frequency start unit.
In both cases, it is important to follow the WPS carefully to ensure the quality and integrity of the welds and to maintain safety during the welding process. It is also important to ensure that the welder performing the work is qualified to use the specific WPS and has the necessary experience and skills to produce high-quality welds.