Super Duplex Loose Flanges are specialized piping components designed to provide a flexible and corrosion-resistant flanged connection in demanding industrial piping systems. Unlike fixed flanges that are permanently attached to the pipe, a loose flange can be positioned around the pipe and used together with a compatible stub end or similar component. This arrangement can simplify pipe alignment and make installation, inspection, and maintenance more convenient in suitable applications.
Manufactured from super duplex stainless steel, these flanges combine high mechanical strength with excellent resistance to pitting, crevice corrosion, and chloride-containing environments. Their material properties make them suitable for applications in oil and gas, petrochemical, chemical processing, marine, offshore, desalination, water treatment, and power generation industries.
Super Duplex Loose Flanges can be supplied in different sizes, pressure classes, flange facings, and material grades according to applicable standards and customer requirements. The correct specification depends on pipe dimensions, operating pressure, temperature, fluid characteristics, connection arrangement, and project requirements.
What Is a Super Duplex Loose Flange?
A Super Duplex Loose Flange is a flanged component that is not permanently fixed to the pipe in the same manner as a conventional weld-neck or slip-on flange. It is generally used with a stub end or lap-joint-style arrangement, allowing the flange to rotate or move into position before the final bolted connection is tightened.
This feature can be particularly useful where accurate bolt-hole alignment is important or where the piping system needs greater flexibility during assembly.
In a typical arrangement, the stub end is welded to the pipe while the loose flange fits over the outside of the pipe and behind the stub end. The flange provides the bolting surface, while the stub end provides the sealing face and pipe connection.
The final configuration should always be designed according to the applicable piping code, flange standard, pressure rating, and service conditions.
Super Duplex Stainless Steel Material
Super duplex stainless steel is a high-alloy stainless steel family with a balanced austenitic-ferritic microstructure. This structure provides a combination of high strength and corrosion resistance.
Compared with many conventional stainless steel grades, super duplex materials can provide higher mechanical strength and strong resistance to localized corrosion. They are particularly useful in environments where chloride exposure, seawater, or aggressive process fluids create demanding service conditions.
Common super duplex grades used for flange components include:
- UNS S32750
- UNS S32760
- ASTM A182 F53
- ASTM A182 F55
The exact material designation should be selected according to the applicable product specification and project requirements.
UNS S32750 Super Duplex Loose Flanges
UNS S32750 is a widely used super duplex stainless steel grade for demanding corrosion-resistant applications. It provides high mechanical strength and strong resistance to pitting and crevice corrosion when used under suitable conditions.
Super Duplex Loose Flanges manufactured from UNS S32750 can be used in offshore, marine, oil and gas, desalination, chemical processing, and other applications where the material is appropriate for the operating environment.
The grade may be supplied according to applicable forged stainless steel component specifications and customer requirements.
UNS S32760 Super Duplex Loose Flanges
UNS S32760 is another commonly specified super duplex stainless steel grade. It offers a combination of high strength and corrosion resistance that can be useful in aggressive industrial environments.
Loose flanges made from UNS S32760 may be considered for applications involving seawater, chlorides, process chemicals, and demanding piping conditions.
Material selection between UNS S32750 and UNS S32760 should be based on the actual operating environment, corrosion requirements, applicable standards, and engineering specifications.
Construction of Super Duplex Loose Flanges
The construction of a loose flange differs from that of a permanently attached flange. The flange is designed to work with a compatible stub end or lap-joint arrangement.
A typical connection consists of:
- Main pipe
- Stub end
- Loose flange
- Gasket
- Bolting
- Mating flange or equipment connection
The stub end is generally welded to the pipe. The loose flange is then positioned over the pipe and behind the stub end. During assembly, the flange can be rotated to align the bolt holes with the mating flange.
This arrangement can be useful where repeated disassembly, inspection, or maintenance is expected.
Features of Super Duplex Loose Flanges
Super Duplex Loose Flanges offer several features that make them suitable for specialized piping systems.
Rotatable Flange Arrangement
One of the main characteristics of a loose flange is its ability to rotate around the pipe before the connection is tightened. This can simplify bolt-hole alignment during installation.
High Mechanical Strength
Super duplex stainless steel provides high yield and tensile strength, allowing appropriately designed components to withstand demanding mechanical loads.
Excellent Corrosion Resistance
Super duplex materials provide strong resistance to several forms of corrosion, including pitting and crevice corrosion.
Chloride Resistance
Their corrosion-resistant properties make super duplex grades suitable for selected applications involving seawater and chloride-rich environments.
Easier Alignment
The ability to rotate the loose flange can help simplify alignment between the flange bolt holes and the mating component.
Convenient Maintenance
Loose-flange systems can be practical in applications where components may need to be dismantled for inspection, replacement, or maintenance.
Multiple Configuration Options
Super Duplex Loose Flanges can be supplied with different flange facings, dimensions, pressure classes, and material grades according to applicable requirements.
Types of Super Duplex Loose Flanges
Super Duplex Loose Flanges can be supplied in different configurations depending on the piping design and connection requirements.
Lap Joint Loose Flange
A lap joint arrangement uses a loose flange together with a compatible stub end. The flange provides the bolting surface while the stub end forms the pipe connection and sealing interface.
Raised Face Loose Flange
A Raised Face configuration includes a raised sealing area designed to work with a compatible mating flange and gasket.
Flat Face Loose Flange
Flat Face loose flanges have a flat sealing surface and can be used where a flat-face connection is specified by the piping design.
Ring Type Joint Loose Flange
RTJ configurations incorporate a machined groove for a metallic ring gasket and can be used for suitable high-pressure applications where the applicable standard and design require an RTJ connection.
Custom Loose Flange
Custom Super Duplex Loose Flanges can be manufactured according to customer drawings or specific technical requirements. Dimensions, bolt-hole arrangements, bore details, facing, and other characteristics can be customized within manufacturing capabilities.
Applications of Super Duplex Loose Flanges
Super Duplex Loose Flanges are used in industries where corrosion resistance, mechanical strength, and installation flexibility are required.
Oil and Gas Industry
Oil and gas facilities use extensive piping networks with numerous flanged connections. Loose flanges can be used in suitable applications where alignment flexibility and corrosion resistance are beneficial.
They may be used in process piping, utility systems, offshore installations, and other piping arrangements depending on the applicable engineering requirements.
Offshore Industry
Offshore facilities operate in environments with high humidity, salt spray, and seawater exposure. Super duplex stainless steel can provide useful resistance to chloride-related corrosion in suitable applications.
Loose flange arrangements can also simplify alignment and maintenance of selected offshore piping connections.
Marine Industry
Marine systems commonly handle seawater and other chloride-containing fluids. Super Duplex Loose Flanges can be considered for suitable marine piping applications where corrosion resistance is an important requirement.
Chemical Processing
Chemical plants often contain aggressive process fluids and complex piping arrangements. Super Duplex Loose Flanges may be selected where the material grade is compatible with the chemical environment and operating conditions.
Petrochemical Plants
Petrochemical processing facilities require reliable piping components capable of handling pressure, temperature, and corrosive service conditions. Loose flanges can be used for suitable pipe connections where their configuration provides installation or maintenance benefits.
Desalination
Desalination systems handle seawater and concentrated brine, which can create severe corrosion conditions. Super duplex materials are used in selected components where their corrosion resistance is appropriate.
Water Treatment
Industrial water-treatment systems may contain chlorides and treatment chemicals. Super Duplex Loose Flanges can be considered for suitable applications requiring corrosion-resistant flanged connections.
Benefits of Super Duplex Loose Flanges
The key benefits of Super Duplex Loose Flanges include:
- High mechanical strength
- Excellent resistance to localized corrosion
- Suitable resistance to chloride-containing environments
- Rotatable flange design
- Easier bolt-hole alignment
- Convenient installation in suitable applications
- Useful for maintenance and dismantling
- Compatibility with stub-end arrangements
- Availability in multiple sizes and pressure classes
- Different flange-facing options
- Standard and customized configurations
- Suitable for demanding industrial piping systems
The actual performance depends on correct material selection, flange design, installation procedure, and operating conditions.
Super Duplex Loose Flange Specifications
Super Duplex Loose Flanges are manufactured in different sizes, pressure classes, material grades, and facing configurations to meet the requirements of industrial piping systems. The specification should be selected according to the pipe dimensions, mating flange, operating conditions, and applicable standards.
| Specification | Details |
|---|---|
| Product | Super Duplex Loose Flange |
| Material | Super Duplex Stainless Steel |
| Common Grades | UNS S32750 / UNS S32760 |
| Forged Grades | ASTM A182 F53 / F55 |
| Flange Standards | ASME B16.5 / ASME B16.47 |
| Connection | Lap Joint / Stub End Arrangement |
| Pressure Classes | 150, 300, 600, 900, 1500, 2500 |
| Facing Options | RF, FF, RTJ |
| Manufacturing | Forged / Machined |
| Size | As per applicable standard |
| Inspection | As per customer and project requirements |
| Documentation | MTC and inspection reports as required |
The final product specification should be verified against the approved engineering drawings, piping specifications, and applicable standards before manufacturing.
Super Duplex Loose Flange Dimensions
Dimensions are determined by the nominal pipe size, pressure class, flange standard, and required connection arrangement. Important dimensions can include outside diameter, flange thickness, bore diameter, bolt-hole diameter, bolt-hole circle, number of bolt holes, and overall configuration.
Unlike a fixed flange, the loose flange is designed to work with a compatible stub end. Therefore, the dimensions of both components must be compatible to ensure proper assembly.
For standard applications, ASME B16.5 may be used for applicable flange sizes and pressure classes. Larger flange sizes may be covered by ASME B16.47 or another project-specific standard.
Dimensional accuracy is important for ensuring proper alignment, gasket seating, bolting, and connection with the mating component.
Pressure Classes of Super Duplex Loose Flanges
Super Duplex Loose Flanges can be supplied in a range of pressure classes depending on the applicable standard and size.
Common pressure classes include:
- Class 150
- Class 300
- Class 600
- Class 900
- Class 1500
- Class 2500
The pressure-temperature rating should be determined according to the applicable flange standard and material grade. The nominal pressure class alone should not be used to determine suitability for a particular service.
The operating pressure, temperature, pipe size, material grade, flange dimensions, and applicable piping code should all be considered.
Flange Facing Options
The flange face is an important part of the sealing arrangement. Super Duplex Loose Flanges can be supplied with different facing configurations depending on the application.
Raised Face
Raised Face (RF) loose flanges have a raised sealing surface. They are commonly used with compatible RF mating flanges and suitable gaskets.
Flat Face
Flat Face (FF) loose flanges provide a flat sealing surface. They are selected where the mating connection and piping design require a flat-face arrangement.
Ring Type Joint
RTJ loose flanges feature a precision-machined groove for a metallic ring gasket. This configuration is generally used where the applicable piping design requires a ring-type joint connection.
The flange facing should always match the mating component and gasket arrangement.
Manufacturing Process of Super Duplex Loose Flange
Super Duplex Loose Flanges can be manufactured through a controlled forging and machining process. The manufacturing sequence may include several stages.
1. Material Selection
Certified super duplex stainless steel is selected according to the specified grade and applicable material standard. Heat-number traceability should be maintained throughout manufacturing.
2. Raw Material Preparation
The raw material is cut into suitable sizes for forging or forming. Proper preparation helps achieve consistent material distribution.
3. Forging
The material is heated under controlled conditions and forged into the required basic shape. Controlled forging can help provide the desired mechanical properties and structural integrity.
4. Solution Heat Treatment
Super duplex stainless steel requires appropriate solution heat treatment to achieve the required phase balance and corrosion-resistant properties.
Temperature and cooling conditions should be controlled according to the applicable material specification.
5. Machining
After heat treatment, the flange is machined to achieve the required outside diameter, bore, thickness, bolt-hole pattern, and sealing face.
6. Drilling
Bolt holes are drilled according to the specified flange standard and pressure class. Accurate hole positioning is essential for proper installation.
7. Surface Finishing
Machined surfaces and sealing faces are finished according to the applicable requirements. Care is taken to avoid scratches, dents, or other defects that could affect the connection.
8. Inspection
Finished flanges are subjected to dimensional and visual inspection. Additional testing can be performed according to the purchase specification.
9. Marking
Product marking may include the material grade, size, pressure class, heat number, manufacturer’s identification, and applicable standard.
10. Packing
The finished components are cleaned and properly protected before dispatch to prevent damage during storage and transportation.
Quality Control of Super Duplex Loose Flanges
Quality control is important for ensuring that the finished flange meets the required material, dimensional, and mechanical specifications.
Typical inspection activities may include:
- Raw material verification
- Chemical composition testing
- Mechanical property testing
- Heat-treatment verification
- Dimensional inspection
- Visual inspection
- Surface inspection
- Positive Material Identification
- Hardness testing
- Ultrasonic Testing
- Dye Penetrant Testing
Not every test is required for every order. The applicable inspection plan depends on the project specification, product standard, service conditions, and customer requirements.
Positive Material Identification
Positive Material Identification, commonly called PMI, can be used to verify the alloy composition of the supplied Super Duplex Loose Flange.
PMI testing can help confirm that the component corresponds to the specified super duplex material grade. This is particularly useful in critical piping systems where material traceability is important.
Dimensional Inspection
Dimensional inspection verifies that the finished flange conforms to the specified dimensions.
Measurements may include:
- Outside diameter
- Inside diameter
- Bore
- Flange thickness
- Bolt-hole diameter
- Bolt-hole spacing
- Bolt-hole circle
- Number of holes
- Facing dimensions
Dimensional inspection helps ensure compatibility with the mating flange and stub-end arrangement.
Non-Destructive Testing
Non-destructive testing can be performed to identify potential surface or internal discontinuities without damaging the flange.
Depending on the project requirements, testing may include:
Ultrasonic Testing
UT can be used to examine suitable sections of the material for internal discontinuities.
Dye Penetrant Testing
PT is commonly used to identify surface-breaking discontinuities on suitable machined surfaces.
The inspection method and acceptance criteria should be established according to the applicable standard or customer specification.
Material Test Certificate
A Material Test Certificate provides important information about the supplied material and helps maintain traceability.
Depending on the requirements, an MTC can include:
- Material grade
- Heat number
- Chemical composition
- Mechanical properties
- Heat-treatment information
- Product dimensions
- Applicable material standard
- Inspection results
Additional documentation can be supplied when required by the customer or project.
Welding and Installation Considerations
Super Duplex Loose Flanges are generally used as part of a stub-end or lap-joint connection. The stub end is welded to the pipe, while the loose flange is positioned around the pipe behind the stub end.
Welding of the stub end requires suitable procedures because super duplex stainless steel needs controlled welding conditions to maintain its desired metallurgical structure and corrosion resistance.
The welding procedure should address factors such as:
- Qualified welding procedure
- Appropriate filler material
- Heat input
- Interpass temperature
- Pre- and post-weld requirements where applicable
- Welder qualification
- Inspection requirements
The loose flange itself should be correctly positioned before bolting. The ability to rotate the flange can be used to align the bolt holes with the mating flange.
Gasket Selection
The gasket used with a Super Duplex Loose Flange should be compatible with the flange facing, pressure, temperature, and process medium.
For RF and FF arrangements, suitable gasket types should be selected according to the applicable piping design. RTJ configurations require the correct metallic ring gasket corresponding to the groove and applicable standard.
Incorrect gasket selection can result in leakage or damage to the sealing surfaces. Therefore, gasket selection should form part of the overall piping engineering design.
Bolting Requirements
Correct bolting is essential for achieving a reliable flanged connection. The bolt material should be compatible with the service environment and specified according to the applicable piping design.
Bolts should be tightened in an appropriate cross-pattern sequence to achieve even gasket compression. Required tightening procedures and torque values should be determined according to the engineering specification and gasket manufacturer’s recommendations.
Over-tightening or uneven tightening can damage the gasket or flange connection and may lead to leakage.
Packaging and Storage
Super Duplex Loose Flanges should be properly protected during storage and transportation.
Sealing faces and machined surfaces should be protected against impact, scratches, moisture, and contamination. Components should be stored in a clean and dry environment.
Material identification and heat-number traceability should remain visible and intact throughout storage and installation.
Proper handling helps preserve the condition of the flange until it is installed in the piping system.
Advantages of Super Duplex Loose Flanges
Super Duplex Loose Flanges provide a combination of material performance and installation flexibility that can be useful in demanding piping systems. Their design allows the flange to be positioned around the pipe and aligned with the mating connection before the bolts are tightened.
Major advantages include:
- High mechanical strength
- Excellent resistance to pitting and crevice corrosion
- Good resistance to chloride-containing environments
- Suitable for marine and offshore applications
- Rotatable design for easier bolt-hole alignment
- Convenient assembly with compatible stub ends
- Useful for piping systems requiring frequent dismantling
- Availability in multiple pressure classes
- Compatibility with RF, FF, and RTJ configurations
- Standard and customized dimensions
- Long service potential under suitable operating conditions
The actual performance depends on material selection, piping design, installation quality, and operating conditions.
Why Use a Loose Flange Instead of a Fixed Flange?
The main distinction between a loose flange and a fixed flange is the way the flange is connected to the pipe.
A fixed flange is permanently attached to the pipe through welding or another specified connection. A loose flange, by comparison, works with a stub end or similar component and can be rotated around the pipe before the connection is tightened.
This rotational capability can be useful when precise bolt-hole alignment is difficult or when the piping system requires convenient disassembly.
Loose-flange arrangements can also be useful for applications where the piping components may need to be removed periodically for inspection or maintenance.
However, the appropriate flange type should be determined by the piping design, pressure requirements, mechanical loads, corrosion conditions, and applicable engineering standards.
Super Duplex Loose Flange Applications
Oil and Gas Piping
Oil and gas facilities use numerous flanged connections across production, processing, transportation, and utility systems. Super Duplex Loose Flanges can be selected for suitable applications where high strength and corrosion resistance are required.
Their rotational design can also simplify alignment during installation, particularly in piping systems with complex flange arrangements.
Offshore Platforms
Offshore piping is exposed to seawater, salt spray, humidity, and other corrosive conditions. Super duplex stainless steel provides useful resistance to chloride-related corrosion when the appropriate grade is selected.
Loose flanges may be used in suitable offshore piping systems where installation flexibility and corrosion resistance are required.
Marine Piping Systems
Marine applications commonly involve seawater, cooling water, and other chloride-containing fluids. Super Duplex Loose Flanges can be used in selected marine piping applications where the material is compatible with the service environment.
Petrochemical Plants
Petrochemical facilities contain process lines, utility piping, and equipment connections operating under different pressure and temperature conditions. Super Duplex Loose Flanges can provide a corrosion-resistant flanged connection for appropriate services.
Chemical Processing Plants
Chemical plants handle a wide variety of process fluids. The correct super duplex grade should be selected based on the chemical composition, concentration, temperature, and other operating conditions.
Where the material is suitable, loose flanges can be used for branch, equipment, and pipeline connections requiring a flexible flange arrangement.
Desalination Facilities
Desalination systems handle seawater and concentrated brine, both of which can create challenging corrosion conditions. Super duplex stainless steel is used for selected desalination components where strong chloride resistance is required.
Water Treatment Systems
Water-treatment facilities can involve chemicals, chlorides, and other corrosive conditions. Super Duplex Loose Flanges can be considered for suitable piping systems where corrosion resistance and a practical flange connection are required.
Power Generation
Power-generation facilities use extensive utility and process piping. Super Duplex Loose Flanges may be used in appropriate systems where their mechanical and corrosion-resistant properties meet the project requirements.
Super Duplex Loose Flanges vs Conventional Stainless Steel
Super Duplex Loose Flanges and conventional stainless steel loose flanges differ primarily in material composition and performance characteristics.
Super duplex grades generally provide higher mechanical strength and stronger resistance to localized corrosion than many conventional austenitic stainless steel grades.
This can make super duplex suitable for applications involving high chloride exposure, seawater, offshore environments, or demanding mechanical conditions.
However, conventional stainless steel may be suitable for less aggressive environments depending on the application. Material selection should therefore be based on the actual service conditions rather than material strength alone.
Super Duplex Loose Flanges vs Duplex Loose Flanges
Duplex and super duplex stainless steels both have a mixed austenitic-ferritic microstructure. Super duplex grades generally contain higher levels of alloying elements and are designed for higher corrosion resistance and mechanical strength than standard duplex grades.
A Super Duplex Loose Flange may therefore be considered when a piping system requires enhanced resistance to localized corrosion or higher mechanical performance.
The final material selection should consider pressure, temperature, process fluid, chloride concentration, corrosion conditions, fabrication requirements, and project specifications.
How to Select the Right Super Duplex Loose Flange
Choosing the correct flange requires consideration of multiple technical parameters.
Pipe Size
The pipe outside diameter and nominal size should be confirmed before selecting the flange and compatible stub end.
Pressure Class
The required pressure class should correspond to the design pressure and temperature of the piping system.
Material Grade
UNS S32750 or UNS S32760 may be selected based on corrosion requirements and project specifications.
Flange Facing
The facing should match the mating component and gasket arrangement. Common options include RF, FF, and RTJ.
Stub End Compatibility
Because a loose flange is generally used with a stub end, the flange and stub-end dimensions must be compatible.
Operating Temperature
Temperature affects pressure-temperature ratings and material performance and should therefore be considered during selection.
Process Medium
The process fluid should be evaluated for corrosive constituents such as chlorides, acids, and other chemicals.
Applicable Standards
The required dimensional, material, and manufacturing standards should be established before ordering.
Inspection Requirements
Critical applications may require additional inspection and certification such as PMI, UT, PT, hardness testing, and material certificates.
Installation of Super Duplex Loose Flange
Proper installation is important for achieving a reliable flanged connection.
Before installation, the flange, stub end, gasket, and mating flange should be inspected for damage or contamination. Sealing surfaces should be clean and free from scratches, dirt, or foreign material.
The stub end should be properly welded to the pipe according to an approved welding procedure. The loose flange should then be positioned around the pipe behind the stub end.
The flange can be rotated to align its bolt holes with the mating flange. Once aligned, the appropriate gasket should be positioned and the bolts installed.
Bolts should be tightened progressively using an appropriate sequence to provide uniform gasket compression. The required tightening procedure should follow the applicable engineering specification and gasket manufacturer’s recommendations.
After assembly, the connection should be inspected for proper alignment and leakage. Pressure testing may be performed according to the applicable piping code or project requirements.
Maintenance of Super Duplex Loose Flanges
Super Duplex Loose Flanges generally require limited maintenance when correctly selected and installed. However, regular inspection can help identify leakage, corrosion, mechanical damage, or deterioration of associated components.
Inspection may include:
- Checking for visible corrosion
- Inspecting the flange and stub-end area
- Checking for leakage
- Inspecting bolts and nuts
- Checking gasket condition where accessible
- Examining surrounding welds
- Checking for mechanical damage
- Reviewing operating conditions
If leakage is identified, the cause should be determined before replacing the gasket or tightening the bolts. Excessive tightening may not correct an underlying alignment, gasket, or flange problem.
Custom Super Duplex Loose Flanges
Manufacturers can supply custom Super Duplex Loose Flanges for applications requiring dimensions or configurations outside standard requirements.
Customization can include:
- Special nominal sizes
- Custom bore dimensions
- Non-standard thickness
- Special pressure classes
- RF, FF, or RTJ facing
- Custom bolt-hole patterns
- Special material grades
- Customer drawings
- Special marking requirements
- Additional inspection requirements
For custom manufacturing, customers should provide detailed drawings, specifications, or dimensional requirements. This allows the manufacturer to verify the design before production.
Super Duplex Loose Flange Manufacturer & Supplier
A reliable Super Duplex Loose Flange manufacturer and supplier should have appropriate experience with high-alloy stainless steel materials and flange manufacturing.
Important factors when selecting a supplier include:
- Experience with super duplex materials
- Controlled forging and machining processes
- Material traceability
- Quality-control procedures
- Dimensional inspection capabilities
- Material certification
- PMI and other testing capabilities where required
- Ability to manufacture according to recognized standards
- Custom manufacturing capabilities
- Proper packaging and documentation
A supplier should be able to provide clear information about the material grade, size, pressure class, flange facing, applicable standards, inspection, and documentation.
Frequently Asked Questions
What is a Super Duplex Loose Flange?
A Super Duplex Loose Flange is a flanged piping component that is generally used with a compatible stub end. Unlike a fixed flange, it can be rotated around the pipe before bolting, helping with flange alignment.
What materials are used for Super Duplex Loose Flanges?
Common materials include UNS S32750 and UNS S32760. Forged components may also be supplied to applicable ASTM A182 grades such as F53 and F55.
What is the purpose of a loose flange?
A loose flange provides a bolting surface while allowing rotational positioning around the pipe. This can make bolt-hole alignment and certain maintenance operations more convenient.
Are loose flanges used with stub ends?
Yes. A loose flange is commonly used as part of a lap-joint or stub-end connection, where the stub end is welded to the pipe and the flange provides the bolting connection.
What pressure classes are available?
Common pressure classes include Class 150, 300, 600, 900, 1500, and 2500, depending on the applicable standard, size, material, and design conditions.
What flange facings are available?
Super Duplex Loose Flanges can be supplied with Raised Face, Flat Face, or Ring Type Joint configurations according to the application.
Are Super Duplex Loose Flanges suitable for seawater?
Super duplex stainless steel has strong resistance to chloride-containing environments and can be used in suitable seawater applications when the grade and design are appropriate.
Can these flanges be customized?
Yes. Custom dimensions, bore sizes, bolt-hole arrangements, flange thicknesses, pressure classes, facings, and inspection requirements can be supplied according to approved specifications.
What testing is available?
Depending on the project, testing can include chemical analysis, mechanical testing, PMI, dimensional inspection, hardness testing, ultrasonic testing, dye penetrant testing, and visual inspection.
Can material certificates be supplied?
Yes. Material Test Certificates and additional inspection documents can be supplied according to customer and project requirements.
What information is required for an inquiry?
Customers should provide pipe size, flange size, material grade, pressure class, facing type, applicable standard, quantity, inspection requirements, and delivery details.
How should Super Duplex Loose Flanges be stored?
They should be stored in a clean, dry environment and protected from impact, contamination, moisture, and damage to machined or sealing surfaces.
Get a Quote for Super Duplex Loose Flanges
For Super Duplex Loose Flange requirements, provide the pipe size, flange dimensions, material grade, pressure class, facing type, stub-end arrangement, quantity, applicable standard, inspection requirements, and delivery details.
Super Duplex Loose Flanges can be supplied in standard and customized configurations for industrial piping applications, subject to applicable standards and technical requirements.