According to ASME B31.1, all welds on steam or heating media piping must comply with what standards?

The requirement for all welds on steam or heating media piping to comply with visual examination standards, as outlined in Section 136.4.2 of ASME B31.1, emphasizes the importance of quality and integrity in welds used in high-pressure piping systems. This section details the visual inspection criteria and methods to ensure that welds meet the necessary specifications and are free from defects that can compromise the system's safety and performance.

Visual examination is critical because it serves as an initial inspection method to identify surface flaws such as cracks, incomplete fusion, or other inconsistencies that may not be visible through other testing methods. Adhering to these standards helps to prevent failures that could lead to leaks, potential hazards, and operational disruptions. Ensuring compliance with these guidelines is essential for maintaining the reliability and safety of piping in applications involving high temperatures and pressures, such as those found in steam systems and heating media.

While other standards, like those related to safety testing, material documentation, and pressure testing, are also important in the overall integrity and compliance of the piping system, the specific emphasis on visual examination highlights a proactive measure that is critical during the welding process and immediately after, ensuring the quality of each weld before further testing or operation.