ASTM A182 F316L Stainless Steel Large Diameter Welded Spectacle Blind Flange

We are one of the largest suppliers of engineered piping products in China. Our products include steel pipes/pipes, fittings and flanges. After more than 20 years of development, we have accumulated a large number of customers all over the world, and Yuhong products have also won unanimous praise from customers.

Yuhong Group has been operating seamless welded pipes and tubes of austenitic stainless steel, super duplex stainless steel, nickel alloy steel (Hastelloy, Monel, Inconel, Inconel) for more than 25 years. Sales of steel pipes, pipes, flanges and accessories.

Our customers have covered more than 45 countries including Italy, Britain, Germany, the United States, Canada, Chile, Colombia, Saudi Arabia, South Korea, Singapore, Australia, Poland, France, etc.

Our group branches and factories have passed:

ABS, DNV, GL, BV, PED 97/23/EC, AD2000-WO, GOST9941-81, CCS, TS, CNNC, ISO9001-2008, ISO 14001-2004.

Spectacle Blind is essentially a simple valve. It is installed in the line between the two flanges and bolted in place. One side of the spectacle curtain is open (clapboard), while the other side of the spectacle curtain is blank (blind or spade).

To go from open to closed, except the pivot bolt is removed and the eyeglass shade is rotated on its center hole, so the blind side is between the flanges. Then install and tighten the bolts. The side hanging out of the pipe is a clear indication of whether the pipe is open or closed.

It is typically used for maintenance when a section of pipeline or equipment needs to be isolated. Because it's a semi-permanent isolation, it's very e, and ety is often the mindset behind using glasses blind in maintenance operations. Compared to valves, they are cheap and strong.

1. Full Specification for Flange

2. Material: