Spectacle Blind Flanges

Detailed Spectacle Blind Flanges Description:


Separating one part of a line from another requires a spectacle blind, able to switch from closed to open and back again. Bleed rings provide a means to release pressure from the pipe through a controlled opening.
Materials used:
Carbon Steel: ASTM A105, A350 LF1,LF2 CL1/CL2 LF3 CL1/CL2, ASTM A694 F42,F46,F48,F50,F52,F56,F60,F65,F70
Stainless Steel: ASTM A182 F304/304L, F316/316L, F316H,F316Ti,F321,F44(UNS S31254)
Alloy Steel: ASTM A182 F1,F5/a,F9,F11,F12,F22,F91
Duplex&Super Duplex Steel: ASTM A182 F51/UNS S31803,F53/UNS S32750 F55/UNS S3260
Special Alloy Steel: Monel400,Inconel 600, Inconel 625, Inconel 800, Inconel 825, chrome-moly
Key Features:
Can be attached to the pipe without welding (sometimes an additional seal weld is used as well)
Ideal for higher pressure and temperature applications for small pipe sizes
Not recommended for larger loads, especially when subjected to higher torque
Uses of threaded flanges:
Threaded flanges can be fitted to pipes of various sizes without welding and this is one chief benefit for which these flanges are highly demanded.
They can be used in extremely high pressure applications, particularly at or near atmospheric temperature, where the necessary post weld heat treatment is not possible.
They are ideal for small diameter piping applications.
They are economical and time saving devices.
These threaded flanges are normally designed for non-cyclic applications.
The flanges are suitable to be used in applications where welding is hazardous.
They can be used in highly explosive areas.
These types of flanges are made from plate, and come in 3 different types.
The first and most widely used type are spec blinds – short for spectacle: these are flanges with two equal outside diameter (OD) parts welded together by way of a ‘bridge’. One of the parts also contains an inside diameter (ID), while the other is a blank, or blind. A whole is put at the halfway mark of the bridge. These are also called spectacles, figure 8’s, and figure 8 blanks, because of their resemblance to reading glasses (spectacles) and figure 8’s. These are referred to as ‘Line Blanks’ in the ASME/ANSI standards.

The second and third types are quite similar: both have longer bridges, referred to as ‘paddles’, which resemble longer handles. One type has only an OD, and so is a blind plate – similar in appearance to a large pizza oven peel. These are referred to as paddle blinds. The other type is exactly the same but comes with an ID as well, enabling flow-through when installed in a piping system. These pieces have holes in the paddle which enables field personnel to determine by sight which piece is installed in a system. These are referred to as paddle spacers, and are often supplied in sets together with the paddle blinds.

All 3 types of these flanges are used in piping systems or pressure vessels where the flow needs to be interrupted from time to time. They are installed between two pipe flanges (as specified above), and by way of a screw inserted into the hole in the bridge or paddle, they are able to rotate or ‘swing’ into and out of position to interrupt or allow the flow, as the user sees fit.
Our spec blind flanges are available with raised, flat, or RTJ faces.

Our company is specialized exporter, manufacturer and supplier of Spectacle Blind Flanges in China.

           

Company:	GZY PipeFitting Industries
Address:	No.273, Siping Road, Shanghai, 200081, China
Region:	Shanghai, China
Contact Person:	Sam Xu
Telephone:	00862133780199

Pipe Fittings
Pipe fittings are widely demanded for any piping and plumbing systems used in industrial and commercial ...

Pipe cap
The main purpose of using pipe caps is to waterproof the connections. They are also used to close the the ends of ...
Product Group: Pipe Cap

Pipe elbows
Pipe elbows are fitting accessories which are used widely in various industrial sectors in pipe fitting. A pipe ...
Product Group: Pipe Elbow

Tee, Cross
Carbon steel: ASTM A234 WPB, WPC, ASTM A420 WPL1, WPL3, WPL6 and WPHY-42/46/52/56/60/65/70 Stainless steel: ASTM ...
Product Group: Pipe Tee

Pipe Reducer
An Eccentric reducer, also called a Bell reducer, has two female (inside) threads of different sizes with centers so ...
Product Group: Pipe Reducer

Pipe bending
A pipe bending machine is vital component for any pipe bending project, particularly those of a large scale. A pipe ...
Product Group: Bend Pipe

Coupling (Full & Half) Fittings
Coupling fittings are used for fluid conduits in which each end portion of two tubes to be connected is provided ...
Product Group: Coupling Fitting

U Bend Hydraulic tube
Hydraulic tubes, Hydraulic pipeline, cylinders Pneumatic cylinders, U tube Carbon Steel U Bend Tube are used in ...
Product Group: Hydraulic Tube

Pipe Flanges
As the mainstay of our business, we are dedicated to providing our customers with all possible options of flanges in ...
Product Group: Butt Weld

Blind Flanges
The blind flange is used to close ends of piping systems. It is a kind of round plate with no center hold but with ...
Product Group: Steel Blind Flange

Lap joint flange
Lap Joint flanges are used on piping fitted with with lapped pipe or with lap joint stub ends. The lap joint flange ...
Product Group: Joint Flange

Orifice flanges
Orifice flanges are used instead of the standard pipe flanges when orifice plate or flow nozzle is used. The basic ...
Product Group: Orifice Flange

Reducing Flanges
Reducing flanges are designed for use in changing diameters in a piping system. A reducing flange comprises a flange ...
Product Group: Reducing Flange

Slip-on Flanges
A Slip-On Flange is bored sightly larger than the outer Diameter of the matching pipe. The pipe slip into the flange ...
Product Group: Slip On Flange

Threaded Flanges
Threaded Flanges are confined to special applications. Their chief merit lies in the fact that they can be assembled ...
Product Group: Threaded Flange

Weld Neck Flanges
Weld Neck Flanges are drilled(machined) with the wall thickness of the flange having the same dimensions of the ...
Product Group: Weldneck Flange

NW Long Weld Neck Flanges
Tube OD sizes: 3/8 to 2 inches Materials: Flange: 304 or 316L stainless steel O-rings: Viton, Buna, & ...
Product Group: Weld Neck Flange

Large size steel flange
Large-diameter steel flange is made of carbon steel and stainless steel flanges. Good ductility low carbon intensity ...
Product Group: Flange

Socket Weld Flanges
Socket welding flange, a popular type of pipe flange, was initially developed for use on small-sized high- pressure ...
Product Group: Socket Weld Flange

Flange bolts
Flange bolts (Special carriage bolts, A286 Flange Bolt) are those type of bolts having a ridge or skirt around the ...
Product Group: Flange Bolts

Pipe Flange Gaskets
Pipe flange gaskets are used for improved joint performance. They are considered much more superior than the ...
Product Group: Pipe Flange Gasket

Wire Seal Flange Gaskets and Bolt Sets
General: Nonrotatable flanges with clearance bolt holes Nominal OD sizes: 12 3/8 to 27 1/8 inches Tube OD sizes: ...
Product Group: Wire Seal, Flange Gasket

Pipe valve
Pipe valves are a popular category in pipe fittings. Pipe valves are mechanisms or devices to regulate or control ...
Product Group: Ball Valve, Butterfly Valve, Check Valve Gate Valve, Glob

Ball Valves
A ball valve is a type of pipe vale that opens by turning a handle attached to a ball inside the valve. They are ...
Product Group: Ball Valve

Butterfly Valves
A butterfly valve is a rotary motion valve. The main purpose of butterfly valve is used to stop, regulate, and start ...
Product Group: Butterfly Valve

Gate Valve
The gate valve is considered to be the most popular style of valve in the world of flow control. It is a type of ...
Product Group: Gate Valve

Plug Valve
Plug valves are one of the most popular category of pipe vales used in variety of applications. Also known as cock ...
Product Group: Plug Valve

Power Station Valves
All the power station valves we provide are professionally designed and skillfully manufactured. Our power station ...
Product Group: Power Station Valve

Dc 24v Venetian Blind Motor

Carbon Steel Flanges With Standards Ansi Din Jis Gb

Useful Tactile Paving For Blind Stone

Aluminum Window Blind Window -shutter

Blind Accessories

Dark Granite G654 Blind Surface

Bamboo Blind

Blind Stone

G684 Blind Stone

Paulownia Wood Blind

Us Standard Size Acrylic Shower Tray With Three Sides Tile Flanges

Wide Angel Car Blind Spot Mirror With Low

Stable And Durable Aluminum Framing Materials With Roller Blind

Blind Rivet Plastic Clip

Car Blind Spot Parking Sensor System

Blind Plate

Socket Weld Flanges

NW Long Weld Neck Flanges

Weld Neck Flanges

Threaded Flanges