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ANSI B 16.5, ASME B 16.47 Hastelloy Spectacle Blind Flange, of ASTM A182 Hastelloy C22 Spectacle Blind Flanges, Exporter of Hastelloy C276 Raised Face Spectacle Blind Flanges, MSS SP44 Hastelloy ANSI 150 Spectacle Blind Flanges Stockiest.

of Hastelloy C22 Spectacle Blind Flange, Hastelloy C276 Spectacle Blind Flange Supplier, Hastelloy UNS C22 Spectacle Blind Flanges Exporter, Hastelloy C22/C276 DIN 2642 Spectacle Blind Flanges in India.

A spectacle flange is a specialty flange made of two metal discs attached in the middle by a small section of steel.

Hastelloy Spectable flanges get their name because they look like a pair of reading glasses, or spectacles. Spectacle flanges, also known as spectacle blind flanges, are most commonly used on piping systems that need to be separated regularly or where the flow through the systems is regularly stopped. One end of the spectacle flange is solid, while the other end has a hole in the center. The spectacle flange can be rotated to place either the solid or hollow end within the pipe system, thereby opening or closing the flow.

For pipe Flanges-regularly seperated for isolation, maintenance or reasons, a spectacle extrudes Solution. Typically, spec blinds was mounted in the open position so-your flow pipe operates and is normally. Blinds is mounted onto one of the $number so is need to isolate a, it ' s easy!

Hastelloy Spectacle Blinds are used in separating pipe systems for the connection. It is a steel plate divided into two discs of a certain thickness. Out of these two discs, one disc is of a solid plate and other is a ring whose inner diameter is equal to that of a flange. Spectacle Blinds is required in the systems that regularly need to be separated from other installations. Generally, it is mounted in the “Open” position so that flow through the pipe is possible. If it is placed in the “close” position and if it is rotated, then, the pipe is blanked off and no flow is feasible. The whole idea of a spectacle blind is to ensure that an item of equipment is properly and securely blanked off with no leakage or no flow through a valve during maintenance.

The whole idea of a spectacle blind is so that one can be absolutely sure that an item of equipment is properly and securely blanked off with no possibility of any flow or leakage through a valve during maintenance. The flow can be diverted to other items of equipment but not just bypassed around the blank as this would compromise the safety function of the spectacle blind. The flow has to valved off and pressure relieved prior to loosening flange bolts and swinging the blind.

B16.5 ASTM A182 Spectacle Blind Flange, Fusion Bonded Epoxy Coating, EN 1092-2 PN16 Spectacle Blind Flange, ASME B16.5 Dual Hastelloy Spectacle Blind Flange, ANSI B16.5 Class 150 Flat Face Spectacle Blind Flange, Hastelloy C276 30 Inch Spectacle Blind Flange Stockiest.


Standards Specification:

  • Size : 1/2" to 48"
  • Specifications : ASTM A182
  • Rating: 150#, 300#, 600 (2.4640)#, 900#, 1500#, 2500#,

Material & Grade :

Hastalloy :
Grade: Hastalloy B2, Hastalloy B3, Hastalloy C22, Hastalloy C276, Hastalloy X

Chemical Composition

Alloy* C% Co% Cr% Mo% V% W% Ai% Cu% Nb % Ti% Fe% Ni% Other%
Hastelloy B 0.1 1.25 0.6 28 0.3 - - - - - 5.5 rest/bal Mn 0.80; Si 0.70
Hastelloy B2 0.02 1 1 26.0-30.0 - - - - - - 2 rest/bal Mn 1.0, Si 0.10
Hastelloy X 0.1 1.5 22 9 - 0.6 - - - 18.5 - rest/bal Mn 0.6; Si 0.60

Chemical Composition Hastelloy C22

Element Min Max
Molybdenum 12.5 14.5
Chromium 20.0 22.5
Iron 2.00 6.00
Tungsten 2.50 3.50
Cobalt -- 2.50
Carbon -- 0.010
Silicon -- 0.08
Manganese -- 0.50
Vanadium -- 0.35
Phosphorus -- 0.025
Sulfur -- 0.010

Chemical Composition Hastelloy C276

Element Min Max
Molybdenum 15.0 17.0
Chromium 14.5 16.5
Iron 4.0 7.0
Tungsten 3.0 4.5
Cobalt -- 2.50
Manganese -- 2.5
Carbon -- 1.0
Vanadium -- .01
Phosphorus -- 35 max
Sulfur -- .04 max
Silicon -- .03 max
Sulfur -- .08 max

Mechanical Properties

Grade Tensile (ksi) .2% Yield (ksi) Elongation % Hardness (HRb)
C22 115 55 60 89
C276 110 52.6 62 -

Product Features:

  • Sturdy design
  • Accurate dimensions
  • High strength
  • Corrosion resistant
  • Smooth transition from flange thickness to pipe
  • Can be easily radio graphed for flaw detection
  • Can be easily welded to a pipe or fitting with a single full penetrations

Other grades also available :

Stainless Steel :
Grade: 304 (1.4301), 304L (1.4307), 304H (1.4948), 309 (1.4828), 309S, 310, 310S (1.4845) , 316 ( 1.4401), 316H, 316L( 1.4404 /1.4432) , 317, 317L (1.4438), 321 (1.4541), 321 H(1.4878), 347 (1.4550), 347H (1.4961), 904L (1.4539)
Duplex Steel:
Grade: 2205 (1.4507)
Super Duplex Steel:
Grade: 2507 (UNS S32750) (1.4410) (UNS S32750)
Inconel :
Grade: Inconel 600 (2.4640), Inconel 601 (2.4851), Inconel 625 (2.4856), Inconel 718(2.4668)
Incoloy :
Grade: Incoloy 800 (2.4958), Incoloy 800H, Incoloy 800HT
Nickel :
Grade: Nickel 200, Nickel 201
Monel :
Grade: Monel 400 ( 2.4360), Monel K500, Monel R-405
Titanium :
Grade: Gr.1 (3.7025) , Gr.2 (3.7035) , Gr.3:(3.7055) , Gr.5(3.7164/65), Gr. 7(3.7235) , Gr. 11 (3.7225)

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Manufacturing Process :

The manufacturing process of flange mainly is divided into forging, casting, cutting and rolling. .

The casting and forging flanges have advantages that the blanks of them have accurate shape, size and low costs and only need simple process. But forging flanges have manufacturing defects such as blowholes, cracks, etc and have not very smooth internal organization streamline. The obvious advantages of forging flanges are that they can be forged in various shapes and they have low costs. .

Forging flanges generally have lower carbon content than the casting flanges and are not easy to rust. They have smooth streamline, uniform internal organization, and better mechanical performance than that of casting flanges. There are no defects, such as blowholes and cracks existing in the casting flanges. Forging flanges are able to withstand higher shear and drawing forces than casting flanges. However, if adopting improper forging process, it will also cause appearance of large, uneven grains and solidification cracking phenomenon, resulting in higher cost than the casting flanges. .

We can distinguish between the casting flanges and forging flanges from the different production process. To take the centrifugal flange as an example, it is a kind of casting flange. Centrifugal flanges are produced by a precision casting method, which makes the flanges’ organization smaller than those commonly produced by sand casting and improves the quality of flanges, making fewer occurrences of loose tissue, pore, sand hole etc.

Cutting process refers to producing flanges by directly cutting a round plate with the inner diameter, outer diameter and thickness which can be further processed later from the middle plate, and then processing the bolt hole and waterline. The maximum diameter of such flanges is limited by the width of the middle plate.

Cutting process refers to producing flanges by cutting stripes from the middle plate and then rolling them into round shape. This process is mainly used for the production of large flange. After the rolling process, weld and then flatten the round shape, and finally process the serrated spiral finish and bolt hole.

Product Usage & Application :

  • Useful in Paper & Pulp Companies
  • Useful in High Pressure Applications
  • Useful in Oil and Gas Industry
  • Useful in Chemical Refinery
  • Useful in Pipeline
  • Useful in High Temperature Application
  • Useful in Water Pipe Line
  • Useful in Nuclear Power Plants
  • Useful in Food Processing and Dairy Industries
  • Useful in Boiler & Heat Exchangers

Packing :

  • Packing is quite important especially in a case of international shipments in which consignment pass through various channels to reach the ultimate destination, so we put special concern regarding packaging.
  • We pack our goods in numerous ways based on the products. We pack our products in multiple ways, such as,
    • Shrink-wrapped
    • Carton boxes
    • Wooden pallets
    • Wooden boxes
    • Wooden crates

Why Choose Us :

  • You can get the perfect material according to your requirement at the least possible price.
  • We also offer Reworks, FOB, CFR, CIF, and door to door delivery prices. We suggest you to do deal for shipping which will be quite economical.
  • The materials we provide are completely verifiable, right from raw material test certificate to the final dimensional statement.(Reports will show on requirement)
  • e guarantee to give a response within 24hours(usually in the same hour)
  • You can get stock alternatives, mill deliveries with minimizing manufacturing time.
  • We are fully dedicated to our customers. If it will not possible to meet your requirements after examining all options, we will not mislead you by making false promises which will create good customer relations.

Tests we carry out (including both Destructive and Non-Destructive) :

  • Positive material recognition
  • Mechanical examining like tensile, Elongation and reduction of area.
  • Large-scale test
  • Chemical examination-Spectro analysis
  • Firmness test
  • Pitting protection test
  • Small tests
  • X-ray test
  • Impact analysis
  • Eddy current examining
  • Hydrostatic analysis
  • Prompt test

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