High Pressure Pipe Fittings High-pressure pipe fittings, as the name suggests, are fittings with high endurance. According to Chinese industrial standards, pipes that can withstand pressures of ≥16MPa are classified as high-pressure pipe fittings. These fittings have a wide range of applications and are used in many products designed for high-pressure environments. This article introduces high-pressure pipe fittings from various aspects, including gas high-pressure pipe fittings, high-pressure pipe fitting standards, endurance testing, calculations, and joints. 1. Gas High-Pressure Pipe Fittings Here, we introduce a common type, the Shaanxi Zhongze DN15-DN100, primarily made of forged steel. The connection standard is 55° sealed pipe threads, with both inner and outer zinc coating for surface treatment. The applicable product range includes halon-1230 fire suppression systems, IG-541 gas fire suppression systems, and high-pressure carbon dioxide fire suppression systems. This product has passed the performance tests for fire suppression systems and components, ensuring strong safety. 2. High-Pressure Pipe Fitting Standards High-pressure pipe fitting standards vary by country, with even more stringent requirements in some foreign countries. This section mainly discusses some documents and measures issued in China for the formulation of high-pressure pipe fitting standards.