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ASTM A182 F53 Super Duplex Steel Spectacle Figure Eight Blind Flange B16.48

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ASTM A182 F53 Super Duplex Steel Spectacle Figure Eight Blind Flange B16.48

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Brand Name :YUHONG
Model Number :ASTM A105, ASTM A 181, ASTM A 182, GR F1, F11, F22, F5, F9, F91
Certification :API,PED,ABS
Place of Origin :CHINA
MOQ :1PC
Payment Terms :L/C, T/T
Delivery Time :7DAYS
Packaging Details :PLYWOOD CASE,BUNDLE,PALLET
TYPE :SPECTACLE BLIND,FIGURE EIGHT BLIND FLANGE
MATERIAL :ASTM A 105, ASTM A 181, ASTM A 182, GR F1, F11, F22, F5, F9, F91
SURFACE :Black Painting Or Other Color Coating
PACKAGE :PLYWOOD CASE,PALLET
STANDARD :B16.5,B16.47
PRESSURE :150#,300#,600#...
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ASTM A182 F53 Super Duplex Steel Spectacle Figure Eight Blind Flange B16.48

A Spectacle Figure Eight Blind Flange (commonly called a Spectacle Blind Flange) per ASME B16.48 is a piping component used to either fully open or fully close a pipeline. It consists of two discs connected by a small section of metal—one solid plate (to block flow) and one with a hole (to allow flow). The flange is typically rotated to switch between open and closed positions.

Key Features:

  • Standard: ASME B16.48
  • Material: Carbon steel, stainless steel, alloy steel, or other specified materials
  • Pressure Ratings: 150#, 300#, 600#, 900#, 1500#, and 2500#
  • Sizes: Typically ranges from ½” to 24”
  • Application: Used in pipelines to isolate sections for maintenance, testing, or system modifications

A Spectacle Blind Flange is a safety device used in piping systems to either allow or block flow.

It consists of two metal discs connected by a bar:

  • One side is a solid blind (to stop flow).
  • The other side is a ring spacer (to allow flow).

It is typically rotated between these two positions during maintenance or system isolation.

Materials: Carbon steel (ASTM A105), stainless steel (ASTM A182 F316/F304), alloy steel, duplex, and special alloys

ASTM A182 F53 Super Duplex Steel Spectacle Figure Eight Blind Flange B16.48

Applications:

  • Temporary or permanent pipeline isolation
  • Shutdowns, maintenance, or hydro testing
  • Used in industries like oil & gas, petrochemical, and power plants

Test Certificate

Manufacturer Test Certificate as per EN 10204 / 3.1B

ASTM A182 F53 Super Duplex Steel Spectacle Figure Eight Blind Flange B16.48

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