Flanges, pipe fitting and Fastening material.

A pipe flange is a circular disc-shaped pipe part that attaches to a pipe to block or connect other components such as valves, nozzles, special components, etc.

Flange pipe fittings are pipe fittings with metal rings, usually welded to the end of the pipe, with holes drilled for bolting. They are used to secure connections between pump system components such as pumps, valves, filters and other equipment23. They can be made of different materials, such as cast iron, ductile iron, carbon steel or stainless steel34.
They can also have different flange types, such as welded, flat, slip or blind flanges35.They provide sealing without the need for thread sealants, but they require gaskets to seal with other flanged components.
They are commonly used in hard piping conditions such as sewage treatment or potable treatment and industrial fluid handling applications