Nascent Fittings Inc.·Duplex Steel
Duplex Steel CHECK VALVE
Instrumentation & process tube fittings in SS and alloys. Compression elbows, tees & unions with MTCs and worldwide project supply.
- Material
- Duplex Steel
- Size
- Common tube OD ranges
- Standard
- ASME B31.3
- Corrosion
- Excellent
About
Duplex Steel Tube Fittings
Product overview combined with Duplex Steel material context for project selection.
Tube fittings for instrumentation, hydraulic and process tubing connections. Nascent supplies compression, bite-type and related tube fittings in stainless steel and compatible alloys for leak-tight joints under vibration and pressure cycling.
Available in elbows, tees, unions, connectors and adapters sized to common tube OD standards, with material certificates for oil & gas, chemical and utility systems.
Manufacturing note
Check valves are usually installed in the tube line to prevent backflow. A check valve is basically a one-way valve, in which the flow can run freely one way, but if the flow turns the valve will close to protect the piping, other valves, pumps etc. Check valves are used in many different applications. They are often placed on the outlet side of a pump, to protect the pump from backflow. The check valves are installed here to make sure that the coolant is not flushing back down. If the flow turns and no check valve is installed, a water hammer can occur. Water hammer often occurs with an extreme force and will easily damage a pipeline or components. In order to make sure the check valve protects the system properly, each system has to be assessed individually, and factors such as the risk of water hammer, acceptable pressure loss, and the financial consequence of installing a check valve with a too high safety margin against water hammer have to be considered. Check valves are extensively used in the oil and gas production industries and are specifically designed for flow control in the most demanding and hazardous service conditions. A check valve controls the flow direction of fluids and are available in various configurations depending on the application.
Typical applications
- Oil & Gas
- Petrochemical
- Chemical Processing
- Power Generation
- Marine
- Desalination
Configurations
Duplex Steel Tube Fittings types
Open a type for drawings-aligned specifications.
Duplex Steel AIR HEADER MANIFOLDS
Duplex Steel BALL VALVE
Duplex Steel BRANCH TEE
Duplex Steel BULK HEAD UNION
Duplex Steel CHECK VALVE
Duplex Steel CONDENSATE POT
Duplex Steel FEMALE CONNECTOR
Duplex Steel FEMALE TEE
Duplex Steel HOSE CONNECTIONS
Duplex Steel MALE CONNECTOR
Duplex Steel MANIFOLDS VALVE
Duplex Steel NEEDLE VALVE
Duplex Steel OD CAP
Duplex Steel OD PLUG
Duplex Steel REDUCING UNION
Duplex Steel RUN TEE
Material scope
Duplex Steel specification
Dimensional and grade range typically supplied for CHECK VALVE in this material.
- Grade
- ASTM/ASME A/SA A105, LF2
- Grade
- ASTM/ASME A/SA F11, F22, F91 F12, F5, F9,
- Grade
- ASTM/ASME A/SA-182, 310, 321, 317L, 347, 309, 409, 410, 420, 430, 440, 904L, F304/304L/304H, 316/316L/316H/316Ti etc.
- Grade
- Duplex steel: UNS S32205, S31803
- Grade
- Super Duplex Steel: UNS S32750, S32760
Duplex Steel grades
Available grades for Tube Fittings
Drawn from the Duplex Steel catalog and this product’s material specification.
F44
UNS S31254
High alloy duplex stainless steel.
F45
UNS S31803
Duplex stainless steel with excellent corrosion resistance.
F51
UNS S31803
Most common duplex grade.
F60
UNS S32205
High strength duplex steel.
F61
UNS S32550
Premium duplex steel for aggressive service.
UNS S31803
UNS S31803
Standard duplex stainless (22Cr) commonly supplied to ASTM A815 / A182 F51.
Best for · General duplex piping
UNS S32205
UNS S32205
Modern dual-certified duplex chemistry aligned with F60 / 2205 practice.
Best for · High-strength duplex service
UNS S32750
UNS S32750
Super duplex 25Cr grade for severe chloride and high-strength applications.
Best for · Super duplex chloride resistance
UNS S32760
UNS S32760
Super duplex with tungsten additions for aggressive seawater and process media.
Best for · Aggressive seawater and process fluids
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ViewCompliance
Standards & certificates
Specifications and documentation typically referenced for this product line — details from our shared compliance catalog.
Standards
3ASME B31.3
ASMEProcess piping design code.
- Scope
- Design, materials, fabrication, assembly, erection, examination, inspection and testing of process piping.
- Applies To
- Petroleum, chemical, pharmaceutical, textile, paper, semiconductor and related process plants
ASTM A182
ASTMForged or rolled alloy and stainless steel pipe flanges, fittings, valves and parts.
- Scope
- Forged and rolled stainless, alloy and duplex steel components for high-temperature service.
- Applies To
- Flanges, fittings, valves and pressure parts
- Typical Grades
- F304/L, F316/L, F11, F22, F91, F51/F60 and related
ASME SA182
ASMEASME equivalent of ASTM A182 for forged stainless and alloy components.
- Scope
- Boiler and pressure vessel code adoption of ASTM A182 material requirements.
- Related
- ASTM A182
Certificates
5EN 10204 3.1
Mill test certificate with inspection by the manufacturer’s authorized inspection representative, independent of manufacturing.
- Type
- Inspection document (MTC)
- Scope
- States chemical analysis, mechanical test results and heat / lot identification for the supplied material.
- Documentation
- EN 10204 Type 3.1
- Benefit
- Provides traceable material evidence required on most industrial RFQs.
NACE MR0175
Materials for use in H₂S-containing environments in oil and gas production.
- Type
- Service / sour-service requirement
- Scope
- Limits hardness, microstructure and material selection for sulfide stress cracking resistance.
- Applies To
- Carbon, alloy and CRA piping products ordered for sour service
- Benefit
- Supports upstream oil & gas projects specifying sour-service compliance.
ISO 9001
Quality Management System certification.
- Type
- Quality Management System
- Scope
- Demonstrates a documented QMS covering process control, traceability and continual improvement across manufacturing and supply.
- Benefit
- Assures buyers of consistent product quality and controlled production practices.
- Issued As
- Third-party accredited certificate
PED
Pressure Equipment Directive compliance for equipment placed on the EU market.
- Type
- Regulatory conformity
- Scope
- Design and conformity assessment requirements for pressure equipment and assemblies in the European Union.
- Benefit
- Enables supply of pressure-rated components into EU projects when PED conformity is required.
- Related
- CE marking / Notified Body routes as applicable
IBR
Indian Boiler Regulations approval for boiler-quality piping materials and components.
- Type
- Regulatory approval
- Scope
- Materials and components intended for use under Indian boiler installations.
- Benefit
- Required for many power and process projects under IBR jurisdiction in India.
People also ask
Questions about Tube Fittings
Nascent Fittings Inc. answers common buyer questions for this line.
Does Nascent Fittings Inc. manufacture Tube Fittings?+
Yes. Nascent Fittings Inc. manufactures and supplies Tube Fittings for industrial piping projects, with material grades and sizes aligned to project specifications.
Can Nascent Fittings Inc. export Tube Fittings worldwide?+
Yes. We export Tube Fittings globally with standard export packaging, material test certificates, and documentation support for international shipments.
What materials are available for Tube Fittings?+
Tube Fittings is available in carbon steel, alloy steel, stainless steel, duplex, nickel alloys, copper alloys, aluminium, titanium and other project-specific materials as required.
Need pricing for Duplex Steel CHECK VALVE?
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