Spectacle Flange Manufacturer & Supplier In China: Unmatched Quality And Easy to repair

A spectacle blind flange consists of a spade and a spacer which are manufactured for the purpose of installation in one piece. Used as safety device isolate a particular section of pipe.

  • No welding is required when installing the Spectacle blind Flange

  • Spectacle Flange feature wide pressure tolerances

  • Spectacle Flange will be manufactured to your specifications

  • Guaranteed material: sub ject to third-party testing

What is Spectacle Flange?

Spectacle flange is a kind of connection for pipelines. It's shaped like a figure “8” , one end is a blind plate, and the other end is a combination of throttling rings. It makes full use of throttling rings to transport fluids, and the blind plate is usually used when a piping system needs to be disconnected, which is similar to the function of the barrier that can be used to cut off the valve when it leaks.

The Spectacle flange has the advantage of good sealing performance, which is generally selected as a reliable means of isolation for piping systems that require complete isolation. In addition, it is usually used for pipes with large diameters.There are several sealing face types for spectacle flanges, including raised face (RF), flat face (FF), ring-type joint face (RTJ), etc.

When you choose spectacle flanges, it should be carefully matched with the flange holding it, and the length of the bolt should also be appropriately extended according to the thickness of the blind plate. Moreover, the main materials refer to carbon, stainless steel and alloy steel, you can choose the proper materials according to piping pressure ratings and media.

Applications

Spectacle flanges are widely used for the pipeline connections of petroleum & gas, petrochemical, water engineering, ship building, seawater cleaning, construction etc.

Technical Specifications

International standard size table for spectacle flange

Spectacle Flange According to materials

Carbon steel spectacle flange

Carbon steel spectacle flange is mainly used to completely isolate the production medium. It has the advantages of good elasticity, low steel value, corrosion resistance, and high pressure resistance. The common materials refer to ASTM /ASME A105, A350 LF1, LF2, LF3, A694 F42, F46 to F70.

Stainless steel spectacle flange

The different specifications and materials of spectacle flange, its weight will be different, such as the weight of stainless steel spectacle flange is generally lighter. The common materials refer to ASTM / ASME A182 F304/L, F316/L, 310/S, 327/H,904L, etc.

Alloy steel spectacle flange

Alloy steel spectacle flange is mainly made of alloy steel, which has the advantages of higher strength and corrosion resistance. And easy to use for no welding. The common materials refer to ASTM / ASME A/SA 182 & A 387 F1, F5, F9, F11, F12, F22, F91.

Features

The spectacle flange as a connection device in the piping systems, it has several special features. Please see the introduction in the below table:

Simple construction

The spectacle flange is easy to install. When using the blind plate, it can be operated normally; When using the throttling ring, the installation gap of the blind plate on the pipeline can be filled.

Good sealing performance

The spectacle has the advantage of good sealing performance, it can be used as a reliable means of isolation for systems that require complete isolation.

Strong performance

The horizontal and vertical support force of the spectacle flange is strong, and it can resist most of the horizontal and vertical loads.

Obstructing function

In some specific occasions，the spectacle flange can effectively cut off the medium in the pipeline, rotary fastening immediately meets the requirements of use.

Availability

The spectacle flange can be made of various materials to meet the different needs of engineering in different environments and corrosion resistance.

Spectacle Flange Customization

Customization is available. Metleader can provide flexible customized production service according to the drawings or technical data from clients to meet special requests.

Comparisons

  • Famous steel pipe factories TPCO, Bao Steel etc

  • Production test – 100% test

  • Non-conforming products – Reject

  • NDT – 100% inspect

  • Customized service – available

  • Final inspection – 100% inspect

Other supplier

  • Local small factories raw material

  • Sampling test

  • Non-conforming products: Repair

  • Sampling test

  • Not sure

  • Sampling test

Quality Assurance

1) The thickness of the spectacle flange requires the same thickness at both ends.

2) This product needs to be matched with the valve, and its precision requirements are high. Our company will produce it in strict accordance with the standards or customer drawings.

3) Do pressure resistance testing after production is completed.

4) Cooperate with customer valves for further installation and replacement testing.

Send us a message if you have any questions or request a quote.

Request A Quote