What is BS EN 14420-4 - Flange connection about?  
BS EN 14420-4 specifies requirements for hose tails according to EN 14420-2, with flanges of mating dimensions PN 10/PN 16/PN 25/PN 40 (according to nominal size and pressure stage) according to EN 1092-1, on hose fittings with clamp units according to EN 14420-3.
Maximum working pressure is 25 bar1); maximum working temperature is 65 °C.
Additionally, flanges are also usable according to EN 14422.
Who is BS EN 14420-4 - Flange connection for? 
BS EN 14420-4 on Hose fittings with clamp units is useful for: 
- Manufacturers of hoses 
- Manufacturers of couplings 
- Chemical industries 
- Petroleum industries 
- Gas stations 
- Oil and gas refineries 
Why should you use BS EN 14420-4 - Flange connection?  
a flange connection involves joining two pieces of material together by means of an internal or external lip. A gasket gets fitted between that pair of pieces to prevent any leakage. Then installers generally use bolts to seal them tight.
Two different hoses are connected with the help of flange. Using BS EN 14420-4 you can determine the mechanical characteristics of hose fittings.  
The dimensions mentioned in BS EN 14420-4 is useful in designing these hoses. Specifications and requirements specified are useful in identifying the materials which are resistant to the fluids.  
By using BS EN 14420-4 you can ensure the sustainability of these flange connections in different conditions. With the help of BS EN 14420-4, you can improve the quality of these flange used in fitting the hoses. By applying BS EN 14420-4, you can flange connections for hoses.
