Shijiazhuang Bang dong Pipeline Technology Co,Ltd.
Model No.: BD-L Spectacle Blind
Standard: DIN, GB, JIS, ANSI, GOST
Type: Welding Flange
Material: Alloy Steel
Sealing Surface: FF
Manufacturing Way: Forging
Quality: First Class
Packaging: Plywooden case or pallets
Transportation: Ocean,Land,Air,TNT/ DHL
Place of Origin: Cangzhou,China
Supply Ability: 1000pcs/month
HS Code: 73072300
Port: Tianjin Port,Beijing Air Port,Shanghai Port
A350 LF2 Spectacle Blind Flange . We supply high quality A350 LF2 Blind Spade , A516 Gr60 spade , Spacer & Spade , Forged LTCS Spade , WPHY60 Spacer , Carbon steel forged figure 8 flanges , ASME B16.48 Spectacle blinds , A105N Spectacle Blank . Figure 8 Flange standard is ASME B16.48 , if you require any of them , please contact us freely , we also manufacture according to the drawings .
Alloy Steel: ASTM A182 F1/F5/F9/F11/F22/F91, Etc.
A Spectacle Blind Flange or spec blind, spectacle blank, Spacer & Spade , is a safety device used to isolate a section of line or piece of equipment when the line or equipment needs to be inspected or removed from service. It is different than a valve in that the blind is a permanent or long term isolation device.
A spectacle blind is machined from a single piece of metal that is cut to match the pipe size, fit between two pipe flanges and requires an additional Gasket when it is installed. Also, the bolts will need to be lengthened depending on what piping class and size blind is used. The thickness of the spectacle blind is specified based on the line pressure and pipe size.
The specification that determines the dimensions of a spectacle blinds is ASME B16.48 - Line Blanks. A line blank conforming to this standard will be marked in the following way:
Nominal Pipe Size (NPS)
Nominal Pressure Class
If RTJ, the ring number
One end of the blind will have an opening to allow flow through the pipe during operation and the other end is solid to block flow during maintenance
If you require any Pandle Spacer , Spacer & Spade , ASME B16.48 Spectacle Blind Flange please call me freely .