Ss Flange, CS Flange, Nickel Alloy Forged manufacturer / supplier in China, offering Custom Forged Pressure Vessels & Cylinders - ASTM/En Standards, a Nipoflange Is Used in The Pipe Industry Like a Weldolet or a Nipolet for a 90° Branch Connection. a Nipoflange Is a Combination of Weldolet, Nipolet, Durable Forged Aluminum Cylinders - Corrosion-Resistant Lightweight and so on.