A weld neck flange (also known as a high-hub flange and tapered hub flange) is a type of flange. There are two designs. The regular type is used with pipes. The long type is unsuitable for pipes and is used in process plant.
Working pressure—————————————-2,000psi – 20,000psi
Working medium—————————————- Oil, Natural Gas, Mud
Working temperature—————————————46°C -121℃
Material class———————————————- AA – HH
Specification class—————————————- PSL1 – PSL4
Performance class————————————— PR1 – PR2
Connection——————————————– API 6A Flange, WECO Union