Abstract: To address inconsistent standards, ambiguous conversion benchmarks, and rigid indicator cascading in multi-stage natural gas networks, this study clarifies the applicable boundaries and hierarchical control paths for water dew point indicators of natural gas. Natural gas standards for water dew point and water content across Europe, North America, Russia, and China were systematically reviewed and compared based on indicator forms, limit sources, pressure benchmarks, application scopes, and extrapolation boundaries. Furthermore, key factors influencing indicator settings were analyzed, including pressure, minimum operating temperature, gas source composition, pipe network hierarchy, and detection capability. While international control systems vary in their use of water dew point, water content, or hierarchical limits, they consistently align indicators with handover scenarios, pressure benchmarks, and environmental boundaries. China's current framework-anchored by the functional bottom line of Natural Gas (GB 17820—2018) and the scenario-specific quantitative requirements of Quality Requirements for Gases Entering Long-Distance Transportation Gas Pipeline (GB/T 37124—2018)-offers significant flexibility. However, gaps remain regarding reference values for typical operating conditions, unified conversion benchmarks, hierarchical enterprise internal controls, and closed-loop implementation at the station level. A three - tier control system of "national standards defining boundaries, enterprise internal control conducting hierarchical management, and pipeline stations focusing on field implementation" is constructed. With water dew point as the core indicator, supplemented by water content conversion and the clause of "no free liquid", dynamic correction is realized through detection data and retrospective anomaly analysis. These findings provide a robust technical basis for standard revisions and support enterprise initiatives for energy conservation and consumption reduction.