API 6A A182 F51 RTJ Spectacle Blind Flange 3-1/8 Inch 5000PSI R35

Quick Details

• Size: 4" (DN86)
• Material: F51 (2205/UNS S31803/UNS S32205)
• Place of Origin: Zhejiang, China (Mainland)
• Brand Name: Yaang
• Standard or Nonstandard: Standard
• Technics: Forged
• Standard: API 6A
• Type: F51 RTJ Spectacle Blind Flange

Packaging & Delivery

Packaging Details:	Seaworthy plywood case or as customer requests
Delivery Detail:	2 - 10 days after receiving the deposit

Specifications

API 6A F51 RTJ Spectacle Blind Flange 3-1/8 Inch 5000PSI
1. Material: F51 (2205/UNS S31803/UNS S32205)

2. Size: 3 1/8" (DN86)

3. Standard: API 6A

4. Pressure Ratings: 5000PSI

Spectacle blind flange, is made by a steel spade and spacer, united by a welded handle. Spectacle blind may have a different type of joint face (RR Raised Face, FF Flat Face, RTJ Ring Joint), depending the type of flange.

The rtj spectacle blind flange is usually used on the oil line with two different function:

If the spade is put in between the flanges, it stops the fluid’s passage;

If the spacer is put in between the flanges, the passage of the fluid is allowed.

The rtj spectacle blind flange is inserted between two flanges: in order to guarantee a perfect waterlight two gaskets are normally mounted, one on each side of rtj spectacle blind flange.

China Spectacle Blind Manufacturer Yaang supplies API 6A F51 RTJ Spectacle Blind Flange, 3-1/8 Inch, 5000PSI.

Composition ranges for 2205 (F51) grade stainless steels

Grade		C	Mn	Si	P	S	Cr	Mo	Ni	N
2205 (S31803)	Min Max	- 0.030	- 2.00	- 1.00	- 0.030	- 0.020	21.0 23.0	2.5 3.5	4.5 6.5	0.08 0.20
2205 (S32205)	Min Max	- 0.030	- 2.00	- 1.00	- 0.030	- 0.020	22.0 23.0	3.0 3.5	4.5 6.5	0.14 0.20

A spectacle blind flange is machined from a single piece of metal that is cut to match the pipe size, fit between two pipe flanges and requires an additional gasket when it is installed. Also, the bolts will need to be lengthened depending on what piping class and size blind is used. The thickness of the spectacle blind is specified based on the line pressure and pipe size.

API and ASME/ANSI flanges - comparing dimensions and pressure ratings

Although the dimensions of ASME and API flanges may sometimes be compatible for bolting - using the same bolt circle and the same number of bolts - they do not share the same pressure rating system.

ASME rates the pressure of a class based on the material of construction and the design temperature

API specifies allowable materials and gives it a specific pressure rating

The difference between ASME/ANSI and API is the fabrication material and a higher rated API operating pressure.

ASME/ANSI flanges are commonly used in industrial process systems handling water, steam, air and gas. API flanges are manufactured for high strength operating refinery systems with products such as oil and explosive gases.

The flange standards API 6A and ASME/ANSI B16.5 have the same dimensions - but the API 6A flanges are rated for higher pressures as indicated below:

API vs. ASME/ANSI Flanges with the same Dimensions
Flange	Pressure Class Rating (psi) (kPa)		Nominal Size Range (inches)
	ASME/ANSI B16.5	API 6A	ASME/ANSI B16.5	API 6A1)
Weld neck	600	2000	1/2 - 24	113/16 - 11
	900	3000
	1500	5000
Blind and Threaded	600	2000		113/16 - 211/4
	900	3000		113/16 - 203/4
	1500	5000		113/16 - 11

¹⁾ In the old API standard, flanges ranged from 1 1/2 to 10(20) inches.

• 1 inch = 25.4 mm

Applications Of API 6A F51 RTJ Spectacle Blind Flange:            

1. petrochemical industry

2. Pharmaceutical industry 

3. Food industry

4. Aviation and aerospace industry

5. Architectural decoration industry

6. Oil and gas industry

Other Features:

1) Chemical and Physical characteristic: durable, corrosion resistant and high-temperature resistant

2) We also produce flange with special specifications according to customers’ requirements;

Packing

1) Packing Method:

Normal packing: Plastic film or bubble paper wrapped, endings protect  by caps,

then into wooden case or load on fumigation plywood pallet.

Custom product: As per your request.

2) Shipping:

By Sea, By Air, By Train or River-and-Sea Coordinated Transport, according to your request.

Where can we find the high quality API 6A F51 RTJ Spectacle Blind Flange 3-1/8 Inch 5000PSI.

You can visit this website: www.yaang.com (Yaang Pipe Industry Co., Limited).

If any inquiry about products, please feel free to contact us sales@yaang.com