General requirements (1) Fire hydrant water supply system piping When hot-dip galvanized steel pipe is used inside and outside the wall, welding should not be used. When the system pipeline adopts the inner wall without anti-corrosion pipeline, it can be welded and connected, but the pipeline welding should meet the relevant requirements. Pipes that cannot be welded by automatic sprinkler systems (referred to as alarm valves) should be threaded, grooved or flanged. (2) Fire hydrant water supply system pipe diameter? 100mm galvanized steel pipe should be flanged or grooved. Pipe diameter of automatic sprinkler system? 100mm It is not clear that threaded connection cannot be used. It is only required to provide flange connection or groove connection point at a certain distance on the pipe section with pipe diameter ≥100mm. (3) Fire hydrant water supply system and automatic sprinkler system piping. When flange connection is used, threaded flange is recommended. When welding flange is used, secondary galvanizing should be carried out. (4) When any pipe section needs to change the pipe diameter, the standard diameter pipe joints and pipe fittings should be used. (5) Relevant provisions in the "National Civil Construction Engineering Technical Measures - Water Supply and Drainage" can be referred to the fire pipe connection methods and related technical requirements. Concerned about surprises Label: Technical points for connection of common pipes for fire water supply Previous: How to choose a cost-effective wooden door Next: What are the points that need attention in the window display? Accelerator Zdec ,Fast Speed Accelerator Zdec,Secondary Accelerator Zdec,Non-Staining Accelerator Zdec Jiang Xi Hi-Tech Technology Co.,Ltd. , https://www.hi-techmasterbatch.com