HG/T21619-1986/HG501 Flange Sight Glass, standard pressure vessel sight glass, material can be customized as desired, pressure 1.0-1.6 MPa.

Flange Sight Glass Main Applications: Used in petroleum, chemical, fiber, pharmaceutical, food, and other industrial production installations to observe the flow and reaction of liquids, gases, steam, and other media at any time. It is an indispensable accessory for ensuring normal production.

Main Technical Parameters of Flange Sight Glass:
1. Shell Material: Carbon steel, stainless steel (SUS304, SUS304L, SUS316, SUS316L), fluorine-lined, plastic (PP, PVC, etc.).

Window Material: Soda-lime glass, borosilicate glass, quartz glass.
3. Operating Temperature: The maximum allowable temperature for soda-lime glass is 150°C, with a rapid temperature change range from 120°C to 20°C. The maximum allowable temperature for borosilicate glass is 280°C, with a rapid temperature change range from 230°C to 20°C. The maximum allowable temperature for quartz glass is 800°C, with a rapid temperature change range from 550°C to 20°C.
4. Operating Pressure: Soda-lime glass: 0.6 MPa.
5. Borosilicate glass: 0.6~1.0 MPa.
6. Quartz glass: 0.6~2.5 MPa.
7. Sealing Ring Material: PTFE, oil-resistant asbestos, rubber, etc.
8. Flange Standards: JB, HGJ, JB, DIN, and other standards. (Users, please specify the pressure rating.)
9. Manufacturing and Inspection Standards: Designed, manufactured, and accepted in accordance with 《HGJ501-86 Pressure Vessel Sight Glass》.