Figure 8 Blind Flange, Stainless Steel Spectacle Blind Flange

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  • Standard: ANSI, DIN, JIS, GOST, Ks,API
  • Material: Stainless Steel
  • Connection: Welding
  • Manufacturing Way: Forging
  • Trademark: C&N
  • Specification: B16.5 B16.47 API605
  • HS Code: 7307910
  • Type: Welding Flange
  • Structure: Round
  • Sealing Surface: RF
  • Weld Neck Flange,Wnrf Flange,Welding Nec: Weld Neck Flange,Wnrf Flange,Welding Neck Raise Fa
  • Transport Package: Wooden Case
  • Origin: China

Spectacle Flange  figure 8 blind flange 
A spectacle blind - also known as a figure-8 blind - is generally a piece of metal that is cut to fit between two pipe flanges and usually sandwiched between two gaskets. A spectacle blind is often made from two metal discs that are attached to each other by a small section of steel. The shape is similar to a pair of glasses or "spectacles" - hence the name spectacle blind. One end of the blind will have an opening to allow flow through the pipe during operation and the other end is solid to block flow during maintenance. They are generally installed as a permanent device to separate process piping systems."

Size 
Spectacle flange:1"-24"
DN25-DN600

Pressure 
America Series:Class 150 ,Class 300, Class 600, Class 900A ,Class 1500,Class 2500.           
Europe Series:PN2.5,PN6,PN10,PN16,PN25,PN40,PN63,PN100,PN160,PN250,PN320,PN400.

Flange Facing Types 
America Series:Flat face(FF),Raised face(RF),Tongue(T),Groove(G),Female(F),Male(M),Ring type joints face(RJ/RTJ)
Europe Series:Type A(Flat Face),Type B(Raised Face),Type C(Tongue),Type D(Groove),Type E(Spigot),Type F(Recess),Type G(O-Ring Spigot),Type H(O-Ring Groove)
 

Material 
Carbon steel: ASTM A105,ASTM A105N,GB 20,C22.8.
Alloy steel: ASTM/ASME A234 WP 1-WP 12-WP 11-WP 22-WP 5-WP 91-WP 911 
Stainless steel: ASTM/ASME A403 WP 304-304L-304H-304LN-304N
ASTM/ASME A403 WP 316-316L-316H-316LN-316N-316Ti
ASTM/ASME A403 WP 321-321H ASTM/ASME A403 WP 347-347H
Low temperature steel: ASTM/ASME A402 WPL 3-WPL 6
High performance steel: ASTM/ASME A860 WPHY 42-46-52-60-65-70 

Standards 
ASME ANSI B16.5,ASME ANSI B16.47.
API 605,API 6L.
MSS SP 44
CSA Z245.12
EN1092-1,EN1759-1.
DIN2573,DIN2576.
BS1560,BS 4504,BS 10.
AFNOR NF E29-200-1
ISO7005-1
AS2129
JIS B2220
UNI 2276. UNI 2277.UNI 2278 .UNI 6089 .UNI 6090

Industrial Processes 
Die forging,Machining

C&N is a  professional manufacturer of steel forged flange in China,

Spectacle Blind flange,Figure 8 Flange,Stainless Steel Spectacle Blind flange,

 
Our production scope:
ASTM/ASME/ANSIB16.5, B16.47, ASME/ANSIB16.48 flange
Weld neck flange,WNRF Flange,Welding neck raise face flange,
 
Size 1/2"-120" (DN15-DN3000) 
Pressure: Class150-Class2500 
 
Facing RF/FF / RTJ 

 
Standard: ASTM/ASME/ANSIB16.5, ASME/ANSI B16.3and B16.47, ASME/ANSIB16.42, JIS/KS (5K, 10K, 16K, 20K), DIN2633, DIN2634, DIN2635,EN1092,BS4504,AWWA C206,API 6A ,Customized drawings welcomed

stainless steel :A 182 F 304/304L/316/316L/321/347, Duplex F51/F53/F44/F55/F60/F61
Alloy steel :STM A694/ A694M F42/F46/F52/F56/F60/F70,A182  F5,F9,F11,F22
Carbon steel:ASTM A 105, ST37.2   A 350 LF1, LF2, LF3,API 6A AISI 4130 
 
Inspection: In house and third party

 
Document: MTC Comply with EN10204 3.1 can be provided prior to shipment
 
 

Material		 stainless steel :A 182 F 304/304L/316/316L/321/347, Duplex F51/F53/F44/F55/F60/F61
Alloy steel :STM A694/ A694M F42/F46/F52/F56/F60/F70,A182  F5,F9,F11
Carbon steel:ASTM A 105, ST37.2    A 350 LF1, LF2, LF3,API 6A AISI 4130                
Standard ASTM/ASME/ANSIB16.5, B16.47, ASME/ANSIB16.48, JIS/KS (5K, 10K, 16K, 20K), DIN2633, DIN2634, DIN2635,EN1092,BS4504,AWWA C206,API 6A ,Customized drawings welcomed
Size 1/2" - 120 " (DN15-DN3000) 
Pressure Class150-Class2500 JIS 5k-30k DIN 6bar-40bar 
Type  slip on flange, Weld Neck Flange Threaded Flange Blind Flange,  Orifice Flange socket weld flange, Spacer Ring, Paddle, Spectacle Blind Flange
Surface Treatment  Surface galvanized, antirust coating, Epoxy & FBE Coating,protected with plastic caps       
Packing Pallet/Wooden case(Fumigation free)
Certificate ISO9001,EN10204 3.1 MTC
Quality control  In house and third party

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Scope:
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High pressure quick connector one-way valve will be sealed passage, not oil, of course, and other effects: If there are air bubbles in the system can take the pick head open and emit gases; convenient test cylinder, valve block, and so on.

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