ASTM A182 F51 Blind RF Flange Duplex 2205 Forged, High Strength，Corrosion

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Payment Terms	L/C, T/T
Delivery Time	20-80
Packaging Details	Ply-wooden Case /Iron Case/ Bundle with plastic Cap
Material	F51
Product name	Duplex steel flange
Pressure	150lb,300lb,600lb,900lb,1500lb
Standard	ANSI B16.5 ASME B16.47 SERIES A(MSS SP44)
Type	Threaded flange,Slip on Flange,socket weld flange,weld neck flange,LAP Joint Flange
Process	Forged,Drilling/Bending/Stamping,Casting,sand casting&CNC machining,Forging+machining+heating Treatment
Surface treatment	Heat treatment,Galvanized,Black oxidation,customize,pickeling
Inspection	Mechinical Property Inspection,Factory or third party assigned,100% inspection
Brand Name	YUHONG
Model Number	ASTM A182 F11 CL2
Certification	API , ABS, DNV, GL , LR, NK.
Place of Origin	CHINA

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Product Specification


Payment Terms	L/C, T/T	Delivery Time	20-80
Packaging Details	Ply-wooden Case /Iron Case/ Bundle with plastic Cap	Material	F51
Product name	Duplex steel flange	Pressure	150lb,300lb,600lb,900lb,1500lb
Standard	ANSI B16.5 ASME B16.47 SERIES A(MSS SP44)	Type	Threaded flange,Slip on Flange,socket weld flange,weld neck flange,LAP Joint Flange
Process	Forged,Drilling/Bending/Stamping,Casting,sand casting&CNC machining,Forging+machining+heating Treatment	Surface treatment	Heat treatment,Galvanized,Black oxidation,customize,pickeling
Inspection	Mechinical Property Inspection,Factory or third party assigned,100% inspection	Brand Name	YUHONG
Model Number	ASTM A182 F11 CL2	Certification	API , ABS, DNV, GL , LR, NK.
Place of Origin	CHINA
High Light	ASTM A182 F51 blind flange ，duplex 2205 forged flange ，corrosion resistant oil gas flange

ASTM A182 F51 Blind RF Flange Duplex 2205 Forged, High Strength,Corrosion Resistant for Oil&Gas

The ASTM A182 F51 Blind RF Flange is a solid blind flange made of duplex stainless steel, primarily used to seal pipe ends or as a maintenance access point. RF indicates that its sealing face is raised, which is the most common sealing face type. This product is manufactured strictly according to ASME B16.5 and other dimensional standards.

Blind flanges have many uses. For example, they can permanently or temporarily prevent media leakage or foreign matter ingress. Compared to one-time welded heads, they are removable, facilitating future modifications. Installing a blind flange at an adjacent flange before servicing equipment can create a safe physical barrier. They are also used during hydraulic or pneumatic pressure testing of pipelines.

Chemical Composition
Element	Composition (wt%)
Carbon (C)	≤ 0.03
Silicon (Si)	≤ 1.00
Manganese (Mn)	≤ 2.00
Phosphorus (P)	≤ 0.030
Sulfur (S)	≤ 0.020
Chromium (Cr)	21.0 – 23.0
Nickel (Ni)	4.5 – 6.5
Molybdenum (Mo)	2.5 – 3.5
Nitrogen (N)	0.08 – 0.20

Mechanical Properties
Property	Value (min.)
Tensile Strength	≥ 620 MPa (90 ksi)
Yield Strength (0.2% offset)	≥ 450 MPa (65 ksi)
Elongation (in 2 in / 50 mm)	≥ 25%
Reduction of Area	≥ 45%
Hardness (Brinell)	≤ 293 HBW
Hardness (Rockwell C)	≤ 31 HRC

Application

Oil & Gas: Used for end-sealing of pipelines and isolation of high-pressure natural gas transmission systems in offshore drilling platforms, subsea pipeline systems, and acid gas (including H₂S) services.
Chemical & Petrochemical Processing: Used for port isolation of reactors and storage tanks, and end caps of heat exchangers.
Marine Engineering: Used for seawater pipeline systems, such as desalination plants and ship systems, to effectively resist seawater corrosion.
Power Generation: Used for end-sealing or isolation of boiler systems and steam pipelines.
Water Treatment and General Industry: Used for pipeline isolation in wastewater treatment systems, pressure vessels, and high-pressure storage tanks, as well as for safety isolation during equipment maintenance.

Company Details

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Business Type:

Manufacturer,Distributor/Wholesaler,Importer,Exporter,Trading Company,Seller,Other 
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Year Established:

2007 
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Total Annual:

50M-70M
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Employee Number:

50~850 
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Ecer Certification：

Verified Supplier 

Yuhong Group is one of the large scale group company in China, more than 35 years experience in the international market, providing high-quality services to over 3000 customers, end user which like Aramco, Petrobras, Pemex, Petronas, Ecopetro, Petroecuador, …. till now Yuhong Grou... Yuhong Group is one of the large scale group company in China, more than 35 years experience in the international market, providing high-quality services to over 3000 customers, end user which like Aramco, Petrobras, Pemex, Petronas, Ecopetro, Petroecuador, …. till now Yuhong Grou...

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https://www.steelseamlesspipe.com/

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