This technical article provides a comprehensive review of minimum weld spacing requirements according to major international codes and standards. The analysis covers ASME, API, AWS, ISO, and EN standards with specific focus on pressure equipment, piping systems, and structural applications. While welding is a reliable and efficient method of joining materials, it must be done correctly to ensure the structural integrity of the welded joint and to avoid defects or failures. One critical aspect of the welding process is maintaining the proper minimum distance between two welding. This guide covers the technical reasons why weld spacing matters at the metallurgical level, consolidates the spacing requirements from all major codes and operator standards into a single reference table, introduces a worked calculation approach for common configurations, and provides practical. In welding design, the minimum distance between welds is a crucial parameter affecting the integrity, inspectability, and performance of welded structures. Improper spacing can lead to: Overlapping Heat Affected Zones (HAZ), Increased residual stress, Cracking or failure under pressure or cyclic. Understanding the minimum distance between welds is essential in piping and pressure vessel design. Any suggestions on where I can look? Attached screen shot shows where I want to weld. (Trying to weld two plated to a.