391 Sight Glass Flange With Pipe Adapter For welding on existing pipes PN16, PN40

Sight Glass Flange
With Pipe Adapter
For welding on existing pipes

Sight glass flanges with welding sockets are suitable for welding on piping. Opportunities exist anywhere a sight glass is supposed to be added to an existing pipe. Only a matching opening needs to be created on the existing pipe.

Show all product specifications

Flange: S235JRG2, 1.4571
Glass: Borosilicate glass DIN 7080 (max. 280°C), Soda Lime Glass DIN 8902 (max. 150°C), Quartz Glass (max. 500°C, Special construction)
Seal: C4400, Graphite, PTFE, NBR, Viton

Other materials on request

Design considerations:
Mounting the sight glass will influence the main pipe mechanically and has to be considered according to AD 2000 instructions B9.

ACI Type 391
DN100 on DN500          11-391-100-500-2-1-1
Flange 1.4571
Borosilicate glass

Observe pressure-temperature ratings acc. to DIN EN 1092-1!

For steam or corrosive media we recommend mica disks!


Nominal diameter DN25, DN40, DN50, DN65, DN80, DN100, DN125, DN150, DN200, DN300, DN350
Pressure rating PN16
Sight glass body 1.4571, S235JRG2
Process Connection welding ends, Weld-on
Shape Round Sight Glasses
Ask for more information and/or a quotation for this product

You may also be interested in the following products:

Sight glass illumination

Sight glass illumination