2.ANSI B16.5 carbon steel forged flanges,(Material A105,Q235)150LB,300LB,400LB,600LB,900LB,1500LB,2500LB WNRF,WNFF,SORF,SOFF,THRF,SWRF,LJRF flanges
High welding neck flange, welding neck flange is commonly referred to as the "hub" of the flange. Its purpose is to transfer pressure pipeline, thereby reducing the flange base high stress concentration. Neck flange butt welding is one of the best design that are currently provide flange because of its structural value itself exists. But the price is relatively high, the reason is the product of the production process complicated.