ASME B16.48 forged spectacle blinds flanges class 2500

Spectacle blind, flange spade, and ring spacer are forged products used to blind pipelines, Spectacle blinds (also defined “spectacle flanges”) are manufactured from steel plates and are basically two interconnected discs: one is actually a ring (i.e. a disc with a hole of the same bore size of the pipeline), the other is a solid disc.

Spectacle Blinds Flanges Specification

Standard: ASME B16.48                                                                                                
Flange type:  spectacle blinds flanges Raise Face                                                                                             
Size range:  1/2"-12"                                                                                                
Pressure class:  Class 2500                                                                                                
Surface treatment:  Anti-rust oil, transparent/yellow/black,Anti-rust paint, Zinc,Hot dipped galvanized                                          

SPECTACLE BLIND TYPES:

Flat face spectacle blind (FF): similar to a flat face flange, the surface of the disc is flat (suited for flat face gaskets, for low-pressure applications).
Raised face spectacle blind (RF): likewise raised face flanges, there is an additional thickness on the surface of the disc. This type fits semi-metallic gaskets, as the spiral wound type.
Ring joint face spectacle blind (RTJ): a groove is inscribed on the surface of the disc. This type is used in conjunction with ring joint gaskets.                  

                              Specialize:As per drawing                                   
Material of Spectacle Blind Flange Raised Face:                       
Stainless Steel Material of Spectacle Blind Flange Raised Face:              
ASTM A182F304,304L,304H,316,316L,316Ti,310,310S,321,321H,317,347,347H,904L 
Duplex stainless steel UNS S32304,S31803,S32205.                            
Super Duplex stainless steel UNS S32750/S32760/S31260/S32550/S32707               

Carbon Steel Material of Spectacle Blind Flange Raised Face:               
ASTM A105, Q235, A350 LF2,ASTM A694 F42/F46/F52/F60/F65/F70/F80                 

Alloy Steel Material of Spectacle Blind Flange Raised Face:
ASTM A 182, GR F1,F5, F9, F11, F22, F91                           

Copper&Nickel Alloy Material of Spectacle Blind Flange Raised Face:

CU/NI 90/10, CU/NI 70/30                   

Nickel Alloy Material of Spectacle Blind Flange Raised Face:

Monel 400 & 500, Inconel 600 & 625, Incolloy 800, 825, Hastelloy C22,C276           
Surface treatment:Anti-rust oil,transparent/yellow/black,Anti-rust paint,Zinc,Hot dipped
galvanized                                            

Usage:Oil field, Offshore,Water system,Shipbuilding,Natural gas,Electric power, Pipe
projects,etc.