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[China]
Address: Room2434,3rd floor,Building 469 Fengjin Road,Fengxian District,Shanghai
Contact name:David
BoYue Industrial (Shanghai)Co., Ltd. |
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Spectacle Blind Nickel Alloy Flanges ASME B16.48 Hastelloy C-276 Material Size 2'-24'
1. What is Spectacle Blind or figure 8 blind?
Spectacle blind is pressure retaining plate with one solid end and one open end connected with small nose piece (small tie bar). Now, look at the image of this blind. As it resembles a pair of eyeglasses or numeric number Eight, Spectacle blind is also known as a figure 8 blind and sometimes refer collectively as figure 8 spectacle blind.
2. Paddle blank or Spade or Slip Blind
Paddle blank or spade is similar to the solid end of the spectacle blind. A handle is welded with the spec blind. See the image.
3. Paddle Spacer or Spacer Ring
Paddle blank or spacer ring is similar to the open end of the spectacle blind. A handle is welded with the blank. See the image.
4. Use of Spectacle Blind, Spades and Spacers
Spectacle Blind, Spades and Spacers are used to provide flexibility during maintenance an operation. Therefore, it is essential to consider this during design of Piping system. Blanks are installed in horizontal line. In general, you can see the use of spectacle blind flange at following location;
. At inlets and outlets of static equipment
. At inlets and outlets of rotary equipment
. At inlets and outlets of fired heater and common headers
. In bypass line
. At unit battery limit
5. Spectacle Blind Flange Class & Types
ASME B16.48 standard that covers Line Blanks. This standard covers the Spectacle Blind, Spades and Spacers with pressure class 150, 300, 600, 900, 1500, and 2500 as listed in ASME B16.5.
6. Spec blinds are available in the following face type;
. Raised Face
. Female Ring-Joint Blanks
. Male Ring-Joint Blanks
7. More Information about C276
Hastelloy Alloy C276 Pipe Flanges Chemical Composition
| Grade | C | Mn | Si | S | Co | Ni | Cr | Fe | Mo | P |
| C276 | 0.010 max | 1.00 max | 0.08 max | 0.03 max | 2.50 max | 50.99 min* | 14.50 – 16.50 | 4.00 – 7.00 | 15.00 – 17.00 | 0.04 max |
Hastelloy C276 Plate Flanges Mechanical Properties
| Element | Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| Hastelloy C276 | 8.89 g/cm3 | 1370 °C (2500 °F) | Psi – 1,15,000 , MPa – 790 | Psi – 52,000 , MPa – 355 | 40 % |
Equivalent Grades for C276 Hastelloy Industrial Pipe Flanges
| STANDARD | WERKSTOFF NR. | UNS | JIS | GOST | EN | OR |
| Hastelloy C276 | 2.4819 | N10276 | NW 0276 | ХН65МВУ | NiMo16Cr15W | ЭП760 |
8. Hastelloy Flange Standards / Types And Pressure Class :
| ASME/ANSI B 16.5 | Welding Neck Flange, Slip on Flange, Blind Flange, High Hub Blind Flange, Socket Weld Flange, Lap Joint Flange, Threaded Flange, Ring Type Joint Flange |
| PRESSURE CLASS | 150, 300, 400, 600, 900, 1500, 2500 |
| ASME/ANSI B 16.47 | Welding Neck Flange, Blind Flange [Series A & B] |
| PRESSURE CLASS | 75, 150, 300, 400, 600, 900 |
| ASME/ANSI B 16.36 | Welding Neck Flange, Slip on Flange, Threaded Flange |
| PRESSURE CLASS | 300, 400, 600, 900, 1500, 2500 |
| BS 4504 SEC 3.1 | Welding Neck Flange, Hubbed Slip on Flange, Hubbed Threaded Flange, Lapped Pipe End Flange, Plate Flange, Loose Plate Flange, Loose Plate With Weld Neck Flange, Blank Flange |
| PRESSURE CLASS | PN 2.5 TO PN 40 |
| BS 4504[PART 1] | Welding Neck Flange, Hubbed Slip-On Hubbed Threaded, Plate Flange, Loose Plate With Weld On Plate Collar, Blank Flange |
| PRESSURE CLASS | PN 2.5 TO PN 400 |
| BS 1560 BOSS | Welding Neck Flange, Socket Welding Flange, Slip-On Flange, Blind Flange, Screwed Boss Flange, Lapped Flange |
| PRESSURE CLASS | 150, 300, 400, 600, 900, 1500, 2500 |
| BS10 | Welding Neck Flange, Plate Slip-On Flange, Screwed Boss Flange, Slip-On Boss Flange, Blind Flange |
| TABLE | D, E, F, H |
| DIN FLANGES | DIN 2527, 2566, 2573, 2576, 2641,2642, 2655, 2656, 2627, 2628, 2629, 2631, 2632, 2633, 2634, 2635, 2636, 2637,2638, 2673 |
| PRESSURE CLASS | PN 6 TO PN 100 |
Product Attribute
| Place of Origin | China | Brand Name | BOYUE |
| Standard | ANSI, ISO, ASME, DIN, ASTM | Type | Spectacle Blind Flange |
| ModelNumber | Hastelloy C-276 | Thickness | #150,#300,#600,.#900,#1500,#2500 |
| Packing | Ply-Wood Cases | Payment | 30%TT+70% Balance |
Supply Ability:40000Pieces / per Month
Packaging & Delivery
Packaging Details:Generally plywooden case or following customer's requirement.
Port:Shanghai/Tianjin
Commerce Clause
| Minimum Order Quantity: | 1pcs |
| Price: | Depending on quantity |
| Payment Terms: | T/T or Western Union or LC |
| Supply Ability: | 40000pcs per month |
| Delivery Time: | 10-100 days depending on quantity |
| Packaging Details: | PLY-WOODEN CASE OR PALLET |
Why Choose Us
1. One-Stop Service,One Single Source.
2. No MOQ.
3. Best quality,competitive price
4. Fast Reply.
5. On-Time Delivery
6. Professional sales and technical team .
FAQ
Q1: Are you a factory or a trade company?
A1: We are a professional manufacturer for designing and producing
of Large-size products.(View Mor)
Q2: Do you make customized products or finished parts?
A2: All parts are custom made only, and in stock, we can produce
based on your drawings.
Q3: Will my drawing be safe after you get it?
A3: Yes, we will not release your design to third party unless with
your permission.
Q4: What is the MOQ?
A4: Small order is acceptable, but the more, the cheaper.
Q5: How about the samples?
A5: We are happy to make prototype part or sample for clients to
ensure quality standard, but it’s charged according to your
drawing.
