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Forged ASME B16.47 Series A B Blind Pipe Flanges 22" - 48" Alloy B2 Hastelloy B2

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Forged ASME B16.47 Series A B Blind Pipe Flanges 22" - 48" Alloy B2 Hastelloy B2

Forged ASME B16.47 Series A B Blind Pipe Flanges 22" - 48" Alloy B2 Hastelloy B2
Forged ASME B16.47 Series A B Blind Pipe Flanges 22" - 48" Alloy B2 Hastelloy B2 Forged ASME B16.47 Series A B Blind Pipe Flanges 22" - 48" Alloy B2 Hastelloy B2 Forged ASME B16.47 Series A B Blind Pipe Flanges 22" - 48" Alloy B2 Hastelloy B2 Forged ASME B16.47 Series A B Blind Pipe Flanges 22" - 48" Alloy B2 Hastelloy B2

Large Image :  Forged ASME B16.47 Series A B Blind Pipe Flanges 22" - 48" Alloy B2 Hastelloy B2

Product Details:

Place of Origin: China
Brand Name: BY
Model Number: BYBL0006

Payment & Shipping Terms:

Minimum Order Quantity: 1 pcs
Price: Negotiable
Packaging Details: Regular shipping packaging or depends on customer's requirement
Delivery Time: 10 Work days
Payment Terms: L/C, T/T, Western Union
Supply Ability: 10000 PC Per Month
Detailed Product Description
Material: Alloy Steel Standard: ASME B 16.5
Technic: Forged Pressure: 150#
Thickness: SCH40S Material Grade: A182 80
High Light:

blind flange with hole


blind plate flange

Forged ASME B16.47 Series A BBlind Pipe Flanges 22" - 48" Alloy B2 Hastelloy B2


1. The difference between Hastelloy B2 ASME B16.47 Series A and Series B

The standard ASME B16.47 is further divided into ASME B16.47 series A and ASME B16.47 series B flange for Blind flange and Weldneck flange. Series B flange was also formerly known as API 605 flange. Term B16.47 or B 16 47 or ANSI B 16 47 are all used interchangeabily and refers to the same standard.


ASME B16.47(Large Diameter Steel Flanges) is a standard for large diameter steel pipe flanges sized from NPS 26 through NPS 60. The latest version provides dimensions and ratings in both metric and inch units. The ASME B16.47 incorporate MSS SP-44: Steel Pipeline Flanges and API 605: Large Diameter Carbon Steel Flanges. Therefore, the MSS SP-44 flanges are designated as ASME B16.47 Series A flanges, while API 605 flanges are designated as ASME B16.47 Series B flanges within this standard. Materials covered in this standard are as that in ASME B16.5 except for nickel alloys which means they share the same pressure-temperature chart for the selection of flange materials.


Generally speaking, ASME B16 47 Series A flanges are much thicker, heavier and stronger than Series B flanges in the same size and pressure rating thus can withstand more external loading than Series B type. ASME B16.47 Series B flanges need more but smaller fasteners (bolts & nuts) than Series A flanges and have a smaller bolt circle diameter than that of Series A flanges. The smaller bolt circle diameter results in less flange movement after installation. Both Series A and Series B standards define weld neck flanges and blind flanges in raised face type (RF) but only Series A defines ring type joint (RTJ) flanges from Class 300 through Class 900 within this standard. From a commercial point of view, ASME B16.47 Series A flanges are more expensive than ASME B16 47 Series B flanges.


2. Applied Standard for Nickel Alloy Flange:

Alloy UNS No Flanges
    Valve parts
    Forged Fittings
Ni-Cr-Fe Alloy    
Alloy 20 N08020 ASTM B462
Ni-cr Alloy    
Alloy 718 N07718 ASTM B637
Alloy X-750 N07750 ASTM B637
Alloy 80A N07080 ASTM B637
Ni-Cr-Mo Alloy    
Alloy 725 N07725 ASTM B637
Alloy 686 N06686 ASTM B462
Alloy C-22 N06022 ASTM B462
Alloy C-2000 N06200 ASTM B462
Alloy G-30 N06030 ASTM B462
Alloy G-35 N06035 ASTM B462
Ni-Fe-Cr Alloy    
Alloy 925 N09925 ASTM B637
Ni-Mo Alloy    
Alloy B-2 N10665 ASTM B462
Alloy B-3 N10675 ASTM B462
Ni-Mo-Cr Alloy    
Alloy C-276 N10276 ASTM B462


3. Hastelloy B2 Specification:

Common Trade Names:
Hastelloy B2, Alloy B2; Nimofer 6928

Alloy B2 (UNS N10665 / W.Nr. 2.4617) is a solid solution strengthened, nickel-molybdenum alloy, typically used in extreme reducing conditions. B2 has significantly lower carbon, silicon and iron compared to its’ predecessor, Alloy B (UNS N10001), making the alloy less susceptible to decreased corrosion resistance in the weld zone, in the as-welded condition. Controlling other alloying elements such as iron and chromium
solved other issues concerning fabricability. Stringent chemistry control along with years of development has resulted in the alloy used today, both in Alloy B2 and Alloy B-3 Today, Alloy B2 with restricted chemistry can be used in the welded condition and is less susceptible to SCC under many conditions. As always, care must taken in selecting the right alloy for the desired application.

Alloy B2 should not be used at temperatures between 1000°F and 1600°F as the alloy forms secondary phases that could decrease the ductility of the material.

Available Product Forms:
Plate, Sheet, Bar, Pipe


Chemical Composition

Limiting Chemical Composition, %

Ni................ Balance

Cr................1.00 Max.

Mo............. 26.0 to 30.0

Mn..............1.00 Max.

Fe............... 2.00 Max.

Si.................0.10 Max.

C................ 0.02 Max.

P..................0.040 Max.

Co.............. 1.00 Max.

S..................0.030 Max.


Product Attribute


Place of Origin China Brand Name BOYUE
Standard ASME B16.5 Type Blind Flange
ModelNumber Alloy B2 Hastelloy B2 Thickness #150,#300,#600.#900
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.



Product Description:


Name Forged Blind Flange
Standard ANSI B16.5, ANSI B16.47
Material Grade

Carbon Steel: A105N

Stainless Steel:304,304L,316,316L,UNS31803Etc.

Inconel alloy steel: 600, 625, 800, 825

Outer Diameter 1/2"-80", DN6-DN2400
Pressure CLASS 150LB -CLASS 3000LB
Technology Forged flange
Surface As customer request
Application Pipeline and valves connection
MOQ 1 piece
Productivity 40000 Pieces/Month
Payment term Any payment term is acceptable.
Packing Wooden case or pallet packing.

15 work days



Forged ASME B16.47 Series A B Blind Pipe Flanges 22" - 48" Alloy B2 Hastelloy B2 0


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 .




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.


Contact Details
BoYue Industrial (Shanghai)Co., Ltd.

Contact Person: david

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