Super Duplex Paddle Blind Flanges are solid piping components used to provide positive closure and isolation in industrial piping systems. Manufactured from high-strength super duplex stainless steel, these flanges are designed for applications where corrosion resistance, mechanical strength, and reliable line isolation are important.
A paddle blind flange, also commonly referred to as a paddle blind or paddle blank, is a solid plate with a handle or paddle extension. The extended section makes identification and handling easier during installation, maintenance, and line isolation activities. Unlike a standard blind flange, the paddle design provides a visible indication that the component is intended for isolation.
Super Duplex Paddle Blind Flanges are commonly used in oil and gas, offshore, petrochemical, chemical processing, marine, desalination, water treatment, and other demanding industries. They can be manufactured in different sizes, pressure classes, thicknesses, and flange-facing configurations according to the piping system.
What is a Super Duplex Paddle Blind Flange?
A Super Duplex Paddle Blind Flange is a solid flange-like isolation component manufactured from super duplex stainless steel. It is installed between or at piping connections where the flow passage needs to be physically closed.
The solid body prevents process fluid from passing through the connection when the component is properly installed. The paddle or handle extension provides a convenient visual identification point and can assist with handling.
These components are particularly useful in piping systems where positive isolation is required during maintenance, inspection, equipment servicing, or shutdown operations.
The design can be manufactured according to applicable flange dimensions and project specifications. Depending on the application, configurations may include raised face, flat face, or ring-type joint arrangements.
Super Duplex Stainless Steel Material
Super duplex stainless steel combines high mechanical strength with strong corrosion resistance. Its two-phase metallurgical structure provides a balance of ferritic and austenitic properties.
This makes super duplex grades suitable for many demanding environments where both mechanical loading and corrosion resistance are important considerations.
The material can offer strong resistance to:
- General corrosion
- Pitting corrosion
- Crevice corrosion
- Chloride-containing environments
- Seawater exposure
- Stress corrosion cracking in suitable conditions
The actual corrosion performance depends on the grade, processing, surface condition, temperature, chemical environment, and operating conditions.
Common Material Grades
UNS S32750
UNS S32750, commonly known as Super Duplex 2507, is one of the widely used super duplex stainless steel grades.
It provides high mechanical strength and good resistance to localized corrosion, making it suitable for many offshore, marine, chemical, and process applications.
UNS S32760
UNS S32760 is another commonly specified super duplex grade. It provides a combination of strength and corrosion resistance for demanding industrial environments.
The choice between UNS S32750 and UNS S32760 should be based on the project specification, process conditions, required mechanical properties, and corrosion requirements.
For forged products, ASTM A182 F53 and F55 may be specified where applicable.
Key Features of Super Duplex Paddle Blind Flanges
Super Duplex Paddle Blind Flanges can provide several features for industrial piping applications:
- Manufactured from super duplex stainless steel
- High mechanical strength
- Excellent corrosion resistance
- Strong resistance to localized corrosion
- Suitable for chloride-containing environments
- Suitable for marine and offshore applications
- Solid design for physical line closure
- Paddle extension for easy identification
- Available in multiple sizes
- Available in different pressure classes
- Multiple flange facing options
- Custom dimensions available
- Suitable for critical piping applications
- Material traceability can be provided
- Inspection documentation available as required
The exact configuration should be selected according to the piping design and operating conditions.
Types of Super Duplex Paddle Blind Flanges
Super Duplex Paddle Blind Flanges can be supplied in different configurations depending on the mating flange and sealing arrangement.
Raised Face Paddle Blind Flange
Raised face configurations are commonly used with raised-face flange connections. The sealing surface is raised above the main flange face to accommodate the specified gasket arrangement.
Flat Face Paddle Blind Flange
Flat face configurations are suitable for systems designed around flat-face flange connections. Proper flange alignment and gasket selection are important during installation.
Ring-Type Joint Paddle Blind Flange
RTJ-compatible paddle blind flanges can be manufactured for applications using ring-type joint sealing arrangements.
The groove dimensions and sealing surfaces must match the corresponding flange and gasket requirements.
Custom Paddle Blind Flange
Custom Super Duplex Paddle Blind Flanges can be manufactured according to customer drawings and project requirements.
Customization can include:
- Outside diameter
- Thickness
- Bore or solid configuration
- Bolt hole arrangement
- Paddle dimensions
- Paddle length
- Facing configuration
- Marking
- Material grade
- Pressure class
Applications of Super Duplex Paddle Blind Flanges
Super Duplex Paddle Blind Flanges are used in industries where reliable line isolation and corrosion resistance are required.
Oil and Gas Industry
Oil and gas facilities use extensive piping networks for production, processing, transportation, and utility services.
Paddle blind flanges can be used for physical isolation of selected piping sections during maintenance and shutdown activities.
Super duplex material can be suitable for applications exposed to corrosive fluids, chlorides, or offshore environments.
Offshore Industry
Offshore facilities operate in marine environments where saltwater exposure and atmospheric conditions can create corrosion challenges.
Super Duplex Paddle Blind Flanges can be selected for appropriate piping systems where high strength and corrosion resistance are required.
Petrochemical Industry
Petrochemical facilities handle hydrocarbons and various process chemicals under controlled pressure and temperature conditions.
Paddle blind flanges can support piping isolation requirements while super duplex material can provide suitable corrosion resistance for specified services.
Chemical Processing
Chemical processing plants may handle aggressive chemicals and corrosive process fluids.
The correct super duplex grade should be selected according to the chemical composition, concentration, pressure, temperature, and other operating conditions.
Marine Applications
Marine piping systems frequently encounter seawater and salt-containing environments.
Super duplex stainless steel can be considered for suitable marine applications because of its resistance to chloride-related corrosion.
Desalination Plants
Desalination systems process seawater and concentrated brine streams.
Paddle blind flanges manufactured from suitable super duplex stainless steel can be used in piping systems where high corrosion resistance is required.
Water Treatment
Industrial water treatment plants use piping systems for transporting and controlling different water streams.
Super Duplex Paddle Blind Flanges can be supplied for suitable isolation applications according to water chemistry and system requirements.
Benefits of Super Duplex Paddle Blind Flanges
Positive Physical Isolation
The solid construction provides a physical barrier when properly installed in the piping connection.
This can be useful during maintenance and other activities requiring separation of a piping section.
Easy Identification
The paddle extension provides a visible indication of the installed blind component.
This can help personnel identify isolated connections during plant inspection and maintenance activities.
High Strength
Super duplex stainless steel offers high mechanical strength, making it suitable for demanding piping applications.
Corrosion Resistance
The material provides strong resistance to various corrosion mechanisms, particularly localized corrosion in many chloride-containing environments.
Suitable for Demanding Applications
The combination of mechanical strength and corrosion resistance allows super duplex paddle blinds to be considered for demanding industrial environments.
Customizable Design
Manufacturers can produce paddle blind flanges according to specified dimensions, pressure classes, facing configurations, and project requirements.
Factors to Consider When Selecting a Super Duplex Paddle Blind Flange
Selecting the correct paddle blind requires consideration of the complete piping system.
Pipe Size
The flange dimensions must match the nominal pipe size and mating flange arrangement.
Pressure Class
The pressure class should correspond to the piping system’s design pressure and applicable pressure-temperature requirements.
Common classes may include:
- Class 150
- Class 300
- Class 600
- Class 900
- Class 1500
- Class 2500
Material Grade
UNS S32750 and UNS S32760 are commonly specified super duplex grades. The correct grade should be selected according to service conditions and project specifications.
Facing Type
The required facing should be confirmed before ordering. Common configurations include RF, FF, and RTJ.
Operating Temperature
Temperature affects material performance, gasket selection, bolting, and pressure-temperature ratings. The operating and design temperatures should therefore be considered during specification.
Process Medium
The process fluid should be reviewed for chloride content, chemical composition, concentration, temperature, and other corrosion-related factors.
Inspection Requirements
Projects may require PMI, dimensional inspection, NDT, hardness testing, material certificates, or other quality checks.
Paddle Dimensions
The paddle extension should have suitable dimensions for identification and handling while remaining compatible with the surrounding piping arrangement.
By considering these factors before procurement, users can select a Super Duplex Paddle Blind Flange that meets the mechanical, dimensional, corrosion, and isolation requirements of the intended application.
Super Duplex Paddle Blind Flanges Specifications and Manufacturing
Super Duplex Paddle Blind Flanges are manufactured according to specified material grades, flange dimensions, pressure classes, facing requirements, and inspection standards. Accurate manufacturing is important because the paddle blind must provide a proper physical barrier while maintaining dimensional compatibility with the mating flange.
Super Duplex Paddle Blind Flanges Specifications
The following table provides commonly supplied specifications. Final requirements should be confirmed according to the applicable standard and project specification.
| Specification | Details |
|---|---|
| Product Name | Super Duplex Paddle Blind Flanges |
| Material | Super Duplex Stainless Steel |
| Common Grades | UNS S32750 / UNS S32760 |
| Forged Material Grades | ASTM A182 F53 / F55, where applicable |
| Manufacturing | Forged and Machined |
| Flange Standards | ASME B16.5 / ASME B16.47, where applicable |
| Pressure Classes | 150, 300, 600, 900, 1500, 2500 |
| Facing Options | RF, FF, RTJ |
| Configuration | Solid Paddle Blind |
| Size | As per applicable standard |
| Thickness | As per pressure class and design requirements |
| Paddle | Integral / Extended Handle |
| Inspection | As per customer or project requirements |
| Testing | PMI, dimensional inspection, NDT, and other tests as specified |
| Documentation | MTC and inspection reports as required |
| Customization | Available according to drawings and specifications |
The final product dimensions and specifications should always be confirmed before manufacturing.
Dimensions of Super Duplex Paddle Blind Flanges
Dimensional accuracy is essential for proper installation and sealing.
Depending on the design, dimensions may include:
- Outside diameter
- Flange thickness
- Bolt circle diameter
- Bolt hole diameter
- Number of bolt holes
- Bolt hole spacing
- Facing diameter
- Paddle length
- Paddle width
- Paddle thickness
- Overall height or length
- RTJ groove dimensions, where applicable
For standard products, dimensions can be manufactured according to the applicable flange standard.
For custom paddle blind flanges, dimensions can be produced according to customer drawings, approved dimensional schedules, or project specifications.
Pressure Classes
Super Duplex Paddle Blind Flanges can be supplied for different pressure classes according to the requirements of the piping system.
Common pressure classes include:
- Class 150
- Class 300
- Class 600
- Class 900
- Class 1500
- Class 2500
The pressure class should be selected together with the applicable material, temperature, flange dimensions, gasket arrangement, and piping design.
The pressure-temperature rating should be verified before the component is used in a specific service.
Flange Facing Options
The facing configuration determines how the paddle blind flange seals against the mating flange.
Raised Face
Raised Face, or RF, is commonly used in industrial piping systems. The raised sealing surface accommodates the specified gasket arrangement.
Flat Face
Flat Face, or FF, configurations provide a flat mating surface. These are used where the piping design specifies flat-face connections.
Ring-Type Joint
Ring-Type Joint, or RTJ, configurations are used for applications requiring a metal ring gasket arrangement.
The groove dimensions must be manufactured accurately to match the mating flange and specified gasket.
Applicable Standards
Super Duplex Paddle Blind Flanges can be manufactured with reference to applicable industry standards and customer specifications.
Common standards may include:
- ASME B16.5
- ASME B16.47
- ASTM A182
- Applicable project specifications
- Customer-approved drawings
ASTM A182 may be applicable to forged alloy and stainless steel flange materials, with grades such as F53 and F55 specified for suitable super duplex applications.
The applicable standard depends on the product design, dimensions, material specification, and project requirements.
Manufacturing Process
Manufacturing a Super Duplex Paddle Blind Flange involves multiple controlled processes to achieve the required strength, corrosion resistance, dimensional accuracy, and surface quality.
1. Material Selection
The first step is selecting the specified super duplex stainless steel grade.
Common grades include UNS S32750 and UNS S32760.
For forged products, ASTM A182 F53 or F55 may be specified where applicable.
Material certificates and heat numbers should be reviewed to establish traceability.
2. Raw Material Preparation
The raw material is prepared according to the required manufacturing route.
Material is cut to an appropriate size while allowing sufficient machining and forging allowance.
Proper material identification is maintained throughout production.
3. Forging
Where forged construction is specified, the material is heated and formed under controlled conditions.
Forging can produce a dense structure and suitable mechanical properties for demanding applications.
Process parameters should be controlled carefully when working with super duplex stainless steel.
4. Solution Heat Treatment
Appropriate solution heat treatment is carried out according to the material specification and approved manufacturing procedure.
Controlled heating and cooling help achieve the required metallurgical structure and corrosion performance.
Heat treatment records can be provided as part of the quality documentation when required.
5. Machining
After forging and heat treatment, the component is machined to the required dimensions.
Machining operations may include:
- Outside diameter machining
- Face machining
- Bolt hole drilling
- Facing preparation
- Paddle machining
- Edge finishing
- RTJ groove machining, where required
- Surface finishing
Precision machining helps achieve accurate flange dimensions and mating surfaces.
6. Paddle Formation
The paddle section is manufactured as part of the overall component configuration.
The paddle provides an identification and handling extension and may be designed according to customer requirements.
Custom paddle dimensions can be produced when specified on an approved drawing.
7. Surface Finishing
The finished component is cleaned and inspected for surface condition.
Deburring and suitable finishing operations can be performed to remove sharp edges and machining irregularities.
The final surface condition should meet the specified requirements.
Quality Control
Quality control is performed throughout manufacturing to verify material identity, dimensional accuracy, and product quality.
Typical inspections may include:
- Raw material verification
- Heat number traceability
- Chemical composition verification
- Mechanical property verification
- Heat treatment review
- Visual inspection
- Dimensional inspection
- PMI
- NDT where specified
- Hardness testing where required
- Final inspection
- Documentation review
Inspection requirements vary according to the customer purchase order and project specification.
Positive Material Identification
Positive Material Identification, or PMI, may be performed to verify the alloy composition of the finished paddle blind flange.
PMI testing can help confirm that the component corresponds to the specified super duplex grade.
This is particularly useful for critical applications where material traceability is important.
PMI can be performed according to the applicable inspection procedure and customer requirements.
Dimensional Inspection
Dimensional inspection confirms that the finished product meets the approved drawing or applicable standard.
Typical checks include:
- Outside diameter
- Thickness
- Bolt hole diameter
- Bolt hole quantity
- Bolt circle diameter
- Facing dimensions
- Paddle dimensions
- Overall dimensions
- RTJ groove dimensions, where applicable
Accurate measurements help ensure that the paddle blind flange can be properly aligned with the mating flange.
Non-Destructive Testing
NDT can be performed when specified by the customer or project.
Ultrasonic Testing
Ultrasonic Testing can be used to examine internal material conditions and identify certain internal discontinuities.
Liquid Penetrant Testing
Liquid Penetrant Testing can be used to detect surface-breaking discontinuities on suitable surfaces.
The testing method, extent, and acceptance criteria should be agreed during the procurement stage.
Material Test Certificate
A Material Test Certificate, or MTC, can be provided when required.
Typical information may include:
- Material grade
- Material specification
- Heat number
- Chemical composition
- Mechanical properties
- Heat treatment details
- Product identification
- Inspection results
- Manufacturer information
Material traceability helps connect the finished paddle blind flange with the original raw material.
Marking and Identification
Product marking can be applied according to the applicable standard and customer requirements.
Typical markings may include:
- Manufacturer identification
- Material grade
- Size
- Pressure class
- Heat number
- Product identification
- Standard reference
The paddle extension can also provide a visible identification point during storage and installation.
Gasket Selection
Correct gasket selection is essential for achieving a reliable flange seal.
The gasket should be selected according to:
- Flange facing
- Operating pressure
- Operating temperature
- Process medium
- Material compatibility
- Project specification
RF, FF, and RTJ connections require corresponding gasket arrangements.
The gasket should be clean, undamaged, and suitable for the intended service.
Bolting Requirements
Bolting should be selected according to the flange design, pressure class, temperature, and project requirements.
Important considerations include:
- Bolt material
- Nut material
- Bolt diameter
- Bolt length
- Lubrication
- Tightening sequence
- Required torque
Bolts should generally be tightened in a controlled sequence to achieve uniform gasket compression.
Improper tightening can cause uneven loading, flange distortion, or leakage.
Installation Considerations
Before installation, verify that the paddle blind flange has the correct:
- Size
- Material grade
- Pressure class
- Facing
- Paddle configuration
- Identification
- Surface condition
The mating flange should be properly aligned and cleaned before installation.
The gasket should be positioned correctly and should not be reused unless specifically permitted by the gasket manufacturer or applicable procedure.
Bolting should be tightened according to the approved torque procedure.
For isolation applications, the piping system must be properly shut down, depressurized, drained, and made safe before installing or removing the paddle blind.
Storage and Packaging
Proper storage helps protect Super Duplex Paddle Blind Flanges from damage and contamination.
Products should be stored in a clean, dry, and suitable covered area.
During transportation, suitable packaging can protect against:
- Scratches
- Impact damage
- Moisture
- Contamination
- Flange-face damage
- Identification loss
Large or heavy paddle blind flanges can be packed using suitable pallets, crates, or protective packaging according to shipping requirements.
Protective packaging should remain intact until the product is ready for inspection or installatio
Advantages, Applications and Selection of Super Duplex Paddle Blind Flanges
Super Duplex Paddle Blind Flanges are designed for piping systems where reliable physical isolation, high mechanical strength, and corrosion resistance are required. Their solid construction provides a barrier against process flow, while the paddle extension makes the component easier to identify during plant operation and maintenance.
When manufactured from suitable super duplex stainless steel and correctly specified for the operating conditions, these components can provide dependable service in demanding industrial environments.
Advantages of Super Duplex Paddle Blind Flanges
Reliable Physical Isolation
The solid construction of a paddle blind flange provides a physical barrier when correctly installed between compatible flange connections.
This makes it suitable for piping sections that need to be isolated during maintenance, inspection, cleaning, or equipment servicing.
Easy Visual Identification
The paddle extension provides a clear visual indication of the blind component.
This can help maintenance personnel identify isolated piping connections during inspections and shutdown activities.
High Mechanical Strength
Super duplex stainless steel offers high mechanical strength compared with many conventional stainless steel grades.
This makes it suitable for applications where the piping system is exposed to demanding pressure and mechanical loading conditions.
Excellent Corrosion Resistance
UNS S32750 and UNS S32760 provide strong resistance to many corrosion mechanisms.
Their resistance to localized corrosion can be particularly useful in chloride-containing environments when the material is correctly selected for the service.
Suitable for Offshore and Marine Service
Super Duplex Paddle Blind Flanges can be considered for suitable offshore and marine applications where exposure to seawater, salt spray, and chloride-containing fluids creates challenging corrosion conditions.
Long-Term Durability
A properly manufactured and correctly installed super duplex component can provide long service in demanding environments.
Performance depends on correct material selection, manufacturing quality, installation, process conditions, and maintenance.
Custom Manufacturing
Paddle blind flanges can be manufactured according to customer drawings and project specifications.
Custom options may include dimensions, thickness, paddle size, bolt pattern, facing, material grade, marking, and inspection requirements.
Applications by Industry
Oil and Gas
Oil and gas facilities use numerous piping systems for production, processing, transportation, and utility services.
Super Duplex Paddle Blind Flanges can be used where piping sections require physical isolation during maintenance or operational activities.
They may be considered for applications exposed to corrosive process fluids and chloride-containing environments.
Offshore Platforms
Offshore facilities require materials capable of handling demanding environmental conditions.
Super duplex stainless steel can provide a combination of strength and corrosion resistance suitable for selected offshore piping applications.
The paddle extension also provides a convenient visual reference for isolation components during maintenance activities.
Petrochemical Plants
Petrochemical processing involves hydrocarbon streams and chemical process fluids under controlled pressure and temperature.
Paddle blind flanges can be incorporated into suitable piping arrangements where positive physical closure is required.
Chemical Processing
Chemical plants often handle aggressive fluids with different concentrations and temperatures.
The selected super duplex grade should be evaluated against the actual process chemistry before use.
Desalination Plants
Desalination facilities handle seawater and concentrated brine streams.
Super duplex stainless steel can be considered for suitable applications where resistance to chloride-containing environments is required.
Marine Industry
Marine piping systems may transport seawater, cooling water, brine, and other salt-containing fluids.
Super Duplex Paddle Blind Flanges can be specified for suitable marine applications based on the operating environment.
Water Treatment
Water treatment plants use piping networks for raw water, treated water, wastewater, and process streams.
Paddle blind flanges can support isolation requirements where durable corrosion-resistant materials are needed.
Super Duplex Paddle Blind Flange vs Standard Blind Flange
Both components can provide physical closure, but their designs differ.
| Feature | Super Duplex Paddle Blind Flange | Standard Blind Flange |
|---|---|---|
| Main Function | Physical isolation and line closure | Physical isolation and line closure |
| Design | Solid body with paddle extension | Solid flange body |
| Identification | Visible paddle extension | Standard flange profile |
| Material | Super Duplex Stainless Steel | Available in various materials |
| Custom Paddle | Available | Generally not applicable |
| Typical Use | Isolation and maintenance applications | Piping closure and isolation |
The selection should be based on the piping design, operational procedure, handling requirements, and applicable specifications.
Super Duplex Paddle Blind Flange vs Spectacle Blind
A paddle blind is a solid isolation component with a paddle or handle extension.
A spectacle blind generally incorporates an open section and a blind section in one connected assembly.
| Feature | Paddle Blind | Spectacle Blind |
|---|---|---|
| Configuration | Solid blind | Open and blind sections |
| Primary Function | Physical closure/isolation | Flow and isolation configuration |
| Open Position | Not provided by the blind itself | Open section provides flow |
| Identification | Paddle extension | Connected assembly |
| Typical Requirement | Line closure/isolation | Systems requiring periodic flow/isolation changes |
Terminology can vary between manufacturers and projects. A drawing or technical specification should be provided when ordering non-standard components.
How to Select the Right Super Duplex Paddle Blind Flange
Selecting the correct paddle blind requires a review of both mechanical and operating conditions.
1. Determine Pipe Size
Confirm the nominal pipe size and mating flange dimensions.
2. Select Material Grade
Common material options include:
- UNS S32750
- UNS S32760
The selected grade should meet the applicable material and corrosion requirements.
3. Confirm Pressure Class
Common pressure classes include:
- 150
- 300
- 600
- 900
- 1500
- 2500
The required class should correspond to the piping system’s design requirements.
4. Specify Facing
Confirm whether the connection requires:
- RF
- FF
- RTJ
The facing must match the mating flange and gasket arrangement.
5. Review Operating Temperature
Design and operating temperatures should be considered when selecting the material, gasket, bolting, and pressure rating.
6. Evaluate Process Fluid
The process medium should be reviewed for:
- Chloride concentration
- Chemical composition
- Temperature
- Pressure
- Corrosiveness
- Potential contaminants
7. Confirm Paddle Dimensions
For customized products, specify the required paddle length, width, thickness, and identification requirements.
8. Define Inspection Requirements
Projects may require PMI, dimensional inspection, UT, PT, hardness testing, MTC, or additional quality documentation.
Installation of Super Duplex Paddle Blind Flanges
Installation should follow the approved piping and isolation procedure.
Before installation:
- Confirm the component size and specification.
- Verify the material grade and pressure class.
- Inspect the flange and sealing surfaces.
- Confirm proper flange alignment.
- Ensure the pipeline is depressurized and safe.
- Select the correct gasket.
- Install suitable bolts and nuts.
- Tighten the bolting using the specified sequence and torque.
The flange faces should be clean and free from dirt, oil, scale, or damage that could affect sealing.
The gasket should be positioned correctly and should match the selected flange facing.
After installation, the connection can be inspected according to the applicable pressure-testing and commissioning procedure.
Maintenance and Inspection
Routine inspection can help identify potential issues before they affect piping performance.
Inspection activities may include:
- Visual examination
- Flange-face inspection
- Corrosion inspection
- Paddle condition inspection
- Bolt and nut inspection
- Gasket leakage checks
- Surface condition monitoring
- Dimensional checks where required
- NDT where specified
Special attention may be given to components operating in seawater, brine, chemical, or high-chloride environments.
If corrosion, deformation, surface damage, or leakage is identified, the component should be evaluated according to the applicable plant maintenance procedure.
Custom Super Duplex Paddle Blind Flanges
Custom paddle blind flanges can be manufactured for projects where standard dimensions do not meet the required application.
Customization may include:
- Custom outside diameter
- Special thickness
- Custom bolt-hole arrangement
- Special facing
- Extended paddle
- Modified paddle dimensions
- Special marking
- UNS S32750 material
- UNS S32760 material
- Specific pressure class
- Customer-specific inspection
- Special testing
- Drawing-based manufacturing
Customers can provide technical drawings, dimensional schedules, purchase specifications, or project standards for review before production.
Why Choose a Super Duplex Paddle Blind Flange Manufacturer?
For critical piping applications, selecting a manufacturer with appropriate material and quality-control capabilities is important.
A suitable manufacturer should be able to support:
- Super duplex material selection
- Material traceability
- Controlled forging and machining
- Heat treatment documentation
- Dimensional inspection
- PMI testing
- NDT where specified
- MTC documentation
- Product marking
- Custom manufacturing
- Protective packaging
The manufacturer should review the complete technical specification before confirming the final configuration.
Super Duplex Paddle Blind Flanges Manufacturer and Supplier
As a Super Duplex Paddle Blind Flanges manufacturer and supplier, we can provide products manufactured according to specified material grades, sizes, pressure classes, facing configurations, and project requirements.
Products can be supplied for oil and gas, offshore, petrochemical, chemical processing, marine, desalination, water treatment, and other industrial applications.
Common material grades include UNS S32750 and UNS S32760, with ASTM A182 F53 and F55 applicable to suitable forged material requirements.
Standard and customized paddle blind flanges can be manufactured according to approved drawings and technical specifications.
Frequently Asked Questions
What is a Super Duplex Paddle Blind Flange?
A Super Duplex Paddle Blind Flange is a solid isolation component manufactured from super duplex stainless steel. It is used to physically close or isolate a piping connection.
Why does it have a paddle?
The paddle or handle extension provides a visible identification point and can assist with handling and recognition during installation and maintenance.
Which materials are commonly used?
Common grades include UNS S32750 and UNS S32760. ASTM A182 F53 and F55 may be specified for applicable forged material requirements.
What pressure classes are available?
Common pressure classes include Class 150, 300, 600, 900, 1500, and 2500, subject to applicable standards and design requirements.
What flange facings are available?
Super Duplex Paddle Blind Flanges can be supplied with RF, FF, or RTJ configurations according to the mating flange and project requirements.
Can paddle blind flanges be customized?
Yes. Custom dimensions, thicknesses, paddle configurations, bolt patterns, facings, markings, and inspection requirements can be manufactured according to approved drawings.
Are they suitable for seawater applications?
Super duplex stainless steel can be suitable for many seawater-related applications because of its corrosion resistance. Actual suitability should be evaluated according to seawater chemistry, temperature, pressure, and project requirements.
What inspection documents can be supplied?
Depending on the project, documentation may include MTCs, PMI reports, dimensional inspection reports, heat treatment records, NDT reports, and other quality documents.
What information is needed for a quotation?
For an accurate quotation, provide the material grade, nominal size, pressure class, facing type, paddle dimensions if customized, quantity, applicable standard, inspection requirements, and delivery details.
Get a Quote for Super Duplex Paddle Blind Flanges
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Super Duplex Paddle Blind Flanges can be supplied in standard and customized configurations for demanding industrial piping and isolation applications, with material traceability, dimensional inspection, and documentation according to project requirements.