Product Name: End-of-Line Flame Arrester
Type: Flame Arrester, End-of-Line
Material: Custom
Size (Diameter): 1 Inch, DN25, 25 mm
Pressure Rating: Class 150 LB, PN20
End Connection: RF Flanged
Fluid Service: Corrosion Inhibitor

Source: https://www.landee.cn/end-of-line-flame-arrester-1-in-150-lb-rf-flanged-custom.html