Spectacle Blind Flange

Spectacle Blind Flange


Negotiable Min Order Quantity Unit

Required Quantity
Place of Origin
China
Brand name
Sunny Steel
Payment Terms
D/P,L/C,T/T
Production method
Negotiable
Shipping / Lead Time
Negotiable / Negotiable
Keyword
figure-8 blanks, spectacle blind flange, spectacle blind flanges manufactory
Category
Cast & Forged

China Alloy pipe Manufactory Ltd.

Membership
BIZ
Country / Year Established
China China / 2000
Business type
Manufacturer
Verified Certificate

13

Product name Spectacle Blind Flange Certification -
Category Cast & Forged Ingredients -
Keyword figure-8 blanks , spectacle blind flange , spectacle blind flanges manufactory Unit Size -
Brand name Sunny Steel Unit Weigh -
origin China Stock -
Supply type - HS code 7305

Product Information

Spectacle Blind Flanges, Spectacle Blind Flange, Spectacle Flanges, Spectacle Blind Flanges manufactory 



A figure-8 blank (also called a Spectacle Blind Flange) is a pressure-retaining plate with one solid end and one open end connected with a web or tie bar.

Specifications:

Size: 1/2 to 60inch, DN 12mm to DN 1500mm
Pressure class: Class 150 to Class 2,500, PN 2.5 to PN 250
Facing: RF / RTJ

Cabon steel: A105, A350 LF2
Stainless steel: A182 F304/F304L/F316/F316L/F321
Alloy steel: F11, F12
Packing: plywood case and plywood pallet

Keywrods: Spectacle Blind Flanges, Spectacle Blind Flange, Spectacle Flanges, Spectacle Blind Flanges manufactory

Special bland flange
Standards, Dimensions & Weight

ASME B16.48 Class 150
ASME B16.48 Class 300
ASME B16.48 Class 600
ASME B16.48 Class 900
ASME B16.48 Class 1500
ASME B16.48 Class 2500
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.

 

B2B Trade

Price (FOB) Negotiable transportation -
MOQ Negotiable Leadtime Negotiable
Payment Options D/P,L/C,T/T Shipping time Negotiable

China Alloy pipe Manufactory Ltd.

Country / Year Established
China China / 2000
Membership
BIZ
Business type
Manufacturer

13

President
Sum Xu
Address
No. 273, Siping Road, Shanghai, 200081, China
Product Category
Pipe Fittings,Steel Pipes
Year Established
2000
No. of Total Employees
501-1000
Company introduction

 

Sunny Steel Enterprise Ltd., with strong support of our customers from around the world, we are a professional supplier in steel pipe and pipe fitting. 

 

We provide our customer with mainly steel pipe include Welded pipe, Seamless tubes, Alloy tube, Stainless pipes, and Abrasion resistant pipe. 

 

The fittings include Weldable Components, Forged Fittings, Valves, Flange and Accessories etc.

 

Main Markets

Germany Germany

Luxembourg Luxembourg

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