Product Description：
The NB/T47017 pressure vessel sight glass standard was issued by the National Energy Administration on July 1, 2011 and was implemented on October 1st of the same year.
The NB/T47017 pressure vessel sight glass standard has finally been combined with the HGJ51-502-1986 pressure vessel sight glass, HG/T21575-1994 illuminated sight glass, HG/T21505-1992 combined sight glass and other styles. And do Great improvements have been made, adding the DN200 sight glass specification; increasing the use pressure of some sight glasses; eliminating the sight glass flushing hole, and using the flushing device according to foreign standards; adding the sight glass specification with spotlights; adding Requirements for sight glass marking and shipping packaging.
Main technical parameters of NB/T47017 pressure vessel sight glass:
Main material: carbon steel WCB, stainless steel 304, 321, 316, 316L.
Window material: tempered glass, tempered borosilicate glass, quartz glass.
Sealing material: nitrile rubber, polytetrafluoroethylene.
Working pressure (MPa): ≤2.5
Working temperature (℃): 0~200℃-1300℃
For industry:
Stainless steel flange sight glass. It is a kind of stainless steel sight glass used to observe the change of the medium in the container of chemical industry, petroleum, oil refining, food, cosmetics, medicine and other industrial equipment.