Welding neck flange Steel pipe flange with neck flange is commonly known as welding neck flange. Its appearance is similar to a plate flange + a butt welding horn composition, but the whole part is a whole, usually also known as WN flange, is in accordance with the English full name of the first two capital letters. Butt welding flange is widely used in industry. It is generally used in middle and high-pressure pipes and equipment. It is a kind of flange widely used at present.

It is used for matching flanges on pipes and equipment (instruments, valves, pumps, other equipment, etc.). The appearance of the butt welding flange shows that the butt welding nozzle has high strength and strong sealing performance. It can be used for middle and high-pressure pipelines or equipment, such as chemical, petroleum, and electric power, and other high-pressure positions, such as high-pressure, high-temperature, flammable, explosive, toxic, harmful, and highly toxic media.

WN butt welding flange itself is a whole, and the butt welding method is adopted to connect with the pipe. The butt welding nozzle of the flange is mainly welded with the pipe or pipe fitting, and the welding method is BW butt welding. After welding, welding seam testing is required.

Pressure range:

European system :PN2.5Bar, PN6Bar, PN10Bar, PN16Bar, PN25Bar, PN40Bar, PN63Bar, PN100Bar, PN150Bar, PN250Bar, PN320Bar, PN400Bar.

American system :150LB(PN20Bar), 300LB(PN50Bar), 600LB(PN110Bar), 900LB(PN150Bar), 1500LB(PN260Bar), 2500LB(PN420Bar).