How much should patches overlap components when welding?

When welding patches onto components, the recommended overlap is 13mm. This standard is essential because an adequate overlap ensures that the welded joint has sufficient strength and integrity. A 13mm overlap provides a balance between structural stability and material efficiency, allowing for optimal distribution of stress across the weld. This overlap helps prevent issues such as cracking or failure during the use of the component, particularly in applications where the welded structure may experience dynamic loads or harsh environments. Adhering to this specific measurement promotes better welding techniques and improves the longevity and reliability of the welded joints in dry van applications.