UNS S32750 Tube Fittings & Flange Connectors

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Flange Connector by Samvay Fluid Tekniks — Flange Connector

Precision Tube Fitting Flange Connectors by Samvay Fluid Tekniks Inc.

UNS S32750 Tube Fittings & Flange Connectors

Connect tubing to flanged equipment seamlessly with Samvay Fluid Tekniks Inc.’s specialized Flange Connectors featuring double compression tube fittings on one side. These hybrid connectors combine the security of ASME B16.5 flanges with the reliability of industrial double compression tube fittings, creating the perfect solution for instrumentation, hydraulic, and process connections where tubing must interface with flanged equipment.

Product Overview

Flange connectors with double compression tube fittings serve as critical transition points between tube runs and flanged equipment such as valves, pumps, instruments, and pressure vessels. One end features a standard ASME B16.5 flange for bolted connections, while the other end incorporates a precision-engineered double compression tube fitting for secure tube attachment.

Why These Connectors Are Essential:

Application	Challenge	Solution
Instrument Connections	Connect tubing to flanged transmitters	Flange connector with tube fitting
Hydraulic Systems	Tube to valve manifold connections	Leak-free double compression seal
Sample Lines	Connect to flanged process equipment	Reliable, removable connection
Panel Interfaces	Tube through-panel to flanged equipment	Compact, space-saving design
Field Modifications	Adding instruments to existing flanged systems	Easy retrofit without pipe welding

Double Compression Tube Fitting Advantages:

Feature	Benefit
Two Ferrule System	Front ferrule seals, back ferrule grips, independent functions
No Tube Rotation	Prevents scoring, ideal for vibration
Reusable	Multiple remakes without performance loss
Vibration Resistant	Back ferrule grips securely, absorbs movement
Wide Temperature Range	-425°F to 1200°F (-254°C to 649°C)
Leak-Free	Metal-to-metal seal, no elastomers

Key Features & Benefits

Feature	Technical Benefit	Operational Benefit
One-Piece Machined Body	No welds, no potential leak paths	Highest integrity, compact design
ASME B16.5 Flange End	Standard bolt pattern, facing	Interchangeable with all flanged equipment
Double Compression Tube End	Two-ferrule system for secure grip and seal	Reliable up to 6000 PSI
Full Material Traceability	EN 10204 3.1 certification	Audit-ready quality records
Multiple Facing Options	RF, RTJ, FF to match system	Perfect gasket compatibility
All Tube Sizes	1/8″ to 1″ OD, metric sizes available	Universal application
All Pressure Classes	150# to 2500# flanges	Any system pressure
Precision Machining	CNC turned for perfect concentricity	No misalignment, easy assembly

Technical Specifications

Material of Construction

Stainless Steel: SS304, SS316/L, SS316Ti, SS321
Carbon Steel: ASTM A105 with SS316 tube fitting insert
Duplex: UNS S31803
Super Duplex: UNS S32750
Nickel Alloys: Monel 400, Inconel 625, Hastelloy C276

Flange End Specifications

Flange Standard: ASME B16.5 (standard); DIN EN 1092-1, JIS B2220 available
Flange Size Range (NPS): 1/2″ to 4″ (larger sizes consult factory)
Pressure Class: Class 150, 300, 600, 900, 1500, 2500
Facing Types: Raised Face (RF), Ring Type Joint (RTJ), Flat Face (FF), Male/Female, Tongue & Groove
Flange Face Finish: 125-250 μin Ra standard; 63 μin Ra for RTJ

Tube End Specifications

Tube Fitting Type: Double compression (two ferrule) instrumentation fitting
Tube Size Range: 1/8″, 1/4″, 3/8″, 1/2″, 5/8″, 3/4″, 1″ OD; Metric: 6mm, 25mm
Tube Compatibility: Seamless stainless steel tubing, copper, Monel, Inconel, titanium
Pressure Rating: Up to 6000 PSI (414 Bar) at ambient temperature
Temperature Rating: -425°F to 1200°F (-254°C to 649°C) depending on material
Ferrule Material: Same as body material (standard); Hardened available for difficult tubing
Tube Insertion Depth: Positive stop for consistent assembly

Overall Specifications

Manufacturing Process: Solid barstock, CNC machined in one piece
Surface Finish: As-machined, passivated, electropolished
Identification: Laser marked with size, material, pressure rating, heat code
Testing: 100% pressure tested
Certification: EN 10204 3.1 standard

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Complete Product Range

By Flange Size & Tube Size Matrix:

Flange Size (NPS)	Available Tube Sizes (OD)	Typical Applications
1/2″	1/8″, 1/4″, 3/8″, 1/2″, 6mm, 8mm, 10mm, 12mm	Instrument connections, small bore
3/4″	1/4″, 3/8″, 1/2″, 5/8″, 8mm, 10mm, 12mm, 14mm, 16mm	General instrumentation
1″	1/2″, 5/8″, 3/4″, 12mm, 14mm, 16mm, 18mm, 20mm	Hydraulic systems
1-1/2″	3/4″, 1″, 18mm, 20mm, 22mm, 25mm	Large bore, high flow
2″	1″, 25mm, 32mm (special)	High capacity systems
3″	1″ (multiple connections possible)	Manifold applications
4″	1″ (multiple connections)	Distribution headers

By Flange Pressure Class:

Class	Tube End Pressure Rating	Typical Applications
Class 150	3000 PSI	Low-pressure systems, water, air
Class 300	3000-6000 PSI	Medium-pressure process
Class 600	6000 PSI	High-pressure systems
Class 900	6000 PSI	Very high-pressure, special
Class 1500	6000 PSI	Extreme pressure, critical
Class 2500	6000 PSI	Ultra-high pressure, wellhead

By Flange Face Type:

Face Type	Tube End	Typical Gasket	Application
Raised Face (RF)	Any tube size	Spiral wound, ring	General purpose
Ring Type Joint (RTJ)	Any tube size	Oval/octagonal ring	High-pressure, high-temp
Flat Face (FF)	Any tube size	Full face	Cast iron equipment
Male/Female	Any tube size	Confined	Toxic fluids
Tongue & Groove	Any tube size	Confined	Critical service

By Material Combination:

Body Material	Tube End Material	Application
SS316/L	SS316/L	General chemical, pharmaceutical, food
SS304/L	SS304/L	Water, air, general purpose
A105 CS	SS316/L (insert)	Economical, carbon steel flange with SS tube fitting
A105 CS	CS tube fitting	Carbon steel system
F11 / F22	SS316/L	High temperature
Duplex 2205	Duplex 2205	Offshore, chloride service
Super Duplex	Super Duplex	Extreme corrosion, subsea
Monel 400	Monel 400	Hydrofluoric acid, seawater
Inconel 625	Inconel 625	High temperature, extreme corrosion
Hastelloy C276	Hastelloy C276	Extreme chemical resistance

By Tube Fitting Configuration:

Configuration	Description	Best For
Standard Double Compression	Two-ferrule system, most common	All general applications
Long Ferrule Set	Extended grip length	Thin wall tubing
Oxygen Service	Special cleaning, no lubricants	Oxygen systems
High Purity	Electropolished, special packaging	Pharmaceutical, semiconductor
Nuclear Grade	Full traceability, special testing	Nuclear applications

Dimensional Information

Typical Dimensions (Reference Only, Consult Factory for Exact):

Flange Size	Tube Size	Flange OD	Length (Face to Tube End)	Bolt Circle	Bolt Holes
1/2″ Class 150	1/4″ tube	3.50″	3.0″	2.38″	4 x 1/2″
1/2″ Class 300	1/4″ tube	3.75″	3.2″	2.62″	4 x 5/8″
1/2″ Class 600	1/4″ tube	3.75″	3.5″	2.62″	4 x 5/8″
3/4″ Class 150	1/2″ tube	3.88″	3.2″	2.75″	4 x 1/2″
3/4″ Class 300	1/2″ tube	4.62″	3.5″	3.25″	4 x 3/4″
1″ Class 150	1/2″ tube	4.25″	3.5″	3.12″	4 x 1/2″
1″ Class 300	1/2″ tube	4.88″	3.8″	3.50″	4 x 5/8″
1″ Class 600	1/2″ tube	5.00″	4.0″	3.50″	4 x 3/4″
1-1/2″ Class 150	3/4″ tube	5.00″	4.0″	3.88″	4 x 1/2″
1-1/2″ Class 300	3/4″ tube	6.12″	4.5″	4.50″	4 x 3/4″
2″ Class 150	1″ tube	6.00″	4.5″	4.75″	4 x 5/8″
2″ Class 300	1″ tube	6.50″	5.0″	5.00″	8 x 5/8″

Note: Length varies with tube size and pressure class. Custom lengths available on request.

Double Compression Tube Fitting Details

How Double Compression Fittings Work: The two-ferrule system provides independent sealing and gripping functions:

Component	Function
Front Ferrule	Seals on the tube and fitting body. Creates leak-tight metal-to-metal seal.
Back Ferrule	Grips the tube securely. Acts as a spring, absorbing vibration and preventing loosening.
Body	Precision machined with tapered seat. Provides consistent ferrule compression.
Nut	Drives ferrules during make-up. Captive design prevents ferrule loss.

Assembly Sequence:

Prepare Tube: Cut square, deburr inside and out
Insert Tube: Through nut, through ferrules, bottom in body
Hand Tighten: Turn nut until finger tight
Mark Position: Mark nut at 6 o’clock position
Final Tighten: Turn nut 1-1/4 turns (for 1/4″ to 1/2″ sizes) to 12 o’clock
Check Assembly: Ferrules properly swaged, tube secure

Quality & Compliance

Material Quality

Parameter	Standard / Test
Raw Material	Certified barstock from prime mills
Material Certification	EN 10204 3.1 Mill Test Certificate
Chemical Composition	Spectro analysis verification
Mechanical Properties	Tensile, yield, elongation testing
Hardness Testing	For NACE compliance
PMI Testing	Positive Material Identification (standard for alloys)
Grain Structure	Microstructure analysis for critical applications

Dimensional Quality

Parameter	Standard / Test
Flange Dimensions	ASME B16.5 gauges and fixtures
Tube Fitting Dimensions	Precision optical comparators
Thread Accuracy	ASME B1.20.1 (NPT) or ISO 228 (BSP) gauges
Concentricity	Flange bore to tube fitting centerline within 0.005″ TIR
Surface Finish	Ra 16 or better on sealing surfaces
Ferrule Geometry	100% visual inspection

Performance Testing

Test	Method	Acceptance Criteria
Hydrostatic Test	1.5x rated pressure	No leakage, no permanent deformation

Certifications

Certification	Applicability
ISO 9001:2015	Quality management system
EN 10204 3.1	Material traceability
ASME B16.5	Flange design standard
ASME B31.1 / B31.3	Piping codes
NACE MR0175 / ISO 15156	Sour service (optional)
NACE MR0103	Refinery sour service (optional)

Installation Guidelines

Step-by-Step Installation

1. Prepare the Tube:

Cut tube square using a tube cutter (not hacksaw)
Remove all burrs inside and outside
Clean tube end of oil, dirt, and debris

2. Prepare the Connector:

Check that fitting is clean and undamaged
Verify ferrule set is correct for tube size
Ensure threads are clean

Assemble Tube to Connector:

Slide nut onto tube, then ferrules (back ferrule first, then front ferrule)
Insert tube into body until it bottoms against shoulder
Hand tighten nut until snug
Mark nut position
Tighten to specified turns or torque

Flange Connection:

Ensure flange face is clean and undamaged
Position gasket correctly on flange face
Align bolt holes with mating flange
Insert bolts, hand tighten
Tighten bolts in cross pattern to specified torque

Check Assembly:

Verify tube is fully inserted (no gap)
Verify ferrule swage is correct
Pressure test system before operation

Common Mistakes to Avoid

Mistake	Consequence	Prevention
Tube not fully inserted	Ferrule grips incomplete, leakage	Push until bottom, mark depth
Overtightening tube nut	Ferrule damage, tube deformation	Use prescribed turns/torque
Undertightening tube nut	Incomplete swage, leakage	Use prescribed turns/torque
Wrong ferrule orientation	No seal, no grip	Back ferrule first, then front
Damaged ferrule	Leakage, replacement needed	Inspect before assembly
Dirty tube	Ferrule slips, seal fails	Clean tube thoroughly
Incorrect gasket	Flange leakage	Use correct gasket type/material
Uneven bolt tightening	Flange distortion, leakage	Cross-tighten in sequence

Selection Guide

By Application

Application	Flange Class	Tube Size	Material	Special Features
Instrument Connection to Vessel	150# or 300#	1/4″ or 1/2″	SS316	RF face, standard
Pressure Transmitter to Flanged Nozzle	150#, 600#	1/4″ or 1/2″	SS316	RF or RTJ
Hydraulic Pump to Valve Manifold	300#, 600#	1/2″ or 3/4″	SS316	High-pressure rated
Sample Cooler Connections	150#, 300#	1/4″ or 3/8″	SS316	Compact design
Chemical Injection Quills	300#, 1500#	1/4″ or 3/8″	Hastelloy	Corrosion resistant
Offshore Hydraulics	600#, 1500#	1/2″ or 3/4″	Duplex	NACE, saltwater resistant
Oxygen Systems	300#	1/4″ or 1/2″	SS316	Oxygen cleaning
High Purity Systems	150#	1/4″ or 1/2″	SS316L	Electropolished

By Pressure

System Pressure	Recommended Flange Class	Tube Fitting Rating
0-285 PSI	Class 150	3000+ PSI (ample margin)
285-740 PSI	Class 300	3000+ PSI
740-1480 PSI	Class 600	3000-6000 PSI
1480-2220 PSI	Class 900	6000 PSI
2220-3705 PSI	Class 1500	6000 PSI
3705-6170 PSI	Class 2500	6000 PSI

By Tube Size

Tube OD	Common Applications	Available Flange Sizes
1/8″	Small instrumentation	1/2″ only
1/4″	General instrumentation	1/2″, 3/4″
3/8″	General purpose	1/2″, 3/4″, 1″
1/2″	Hydraulics, process	3/4″, 1″, 1-1/2″
3/4″	Large bore systems	1″, 1-1/2″, 2″
1″	High flow systems	1-1/2″, 2″, 3″

Industry Applications

Oil & Gas

Application	Flange-Tube Combo	Material	Special Requirements
Wellhead Control Panels	1/2″ Class 600 to 1/4″ tube	SS316	NACE MR0175
Flow Computer Connections	1/2″ Class 300 to 1/4″ tube	SS316	Intrinsically safe
Chemical Injection Skids	1/2″ Class 1500 to 1/4″ tube	SS316/Hastelloy	High-pressure, corrosion
Offshore Hydraulics	3/4″ Class 1500 to 1/2″ tube	Duplex	Saltwater resistant
Refinery Instrumentation	1/2″ Class 300 to 1/4″ tube	SS316	Fire-safe

Chemical Processing

Application	Flange-Tube Combo	Material	Special Requirements
Reactor Instrumentation	1/2″ Class 300 to 1/4″ tube	SS316/Hastelloy	Chemical resistant
Acid Lines	1/2″ Class 150 to 1/4″ tube	Hastelloy	Corrosion resistant
Solvent Transfer	3/4″ Class 300 to 1/2″ tube	SS316	Standard
Batch Reactors	1/2″ Class 150 to 1/4″ tube	SS316	Easy disconnect

Power Generation

Application	Flange-Tube Combo	Material	Special Requirements
Boiler Instrumentation	1/2″ Class 600 to 1/4″ tube	SS316	High-temperature
Turbine Controls	1/2″ Class 300 to 1/4″ tube	SS316	Vibration resistant
Feedwater Systems	3/4″ Class 900 to 1/2″ tube	SS316	High-pressure
Cooling Water	1″ Class 150 to 3/4″ tube	SS304	General purpose

Pharmaceutical / Biotech

Application	Flange-Tube Combo	Material	Special Requirements
WFI Systems	1/2″ Class 150 to 1/4″ tube	SS316L	Electropolished, Ra<0.4μm
Bioreactor Connections	1/2″ Class 150 to 1/4″ tube	SS316L	Sanitary, drainable
Clean Steam	1/2″ Class 300 to 1/4″ tube	SS316L	High-purity
Buffer Preparation	3/4″ Class 150 to 1/2″ tube	SS316L	Electropolished

Food & Beverage

Application	Flange-Tube Combo	Material	Special Requirements
Processing Lines	1/2″ Class 150 to 1/4″ tube	SS316	Food-grade
CIP Systems	3/4″ Class 150 to 1/2″ tube	SS316	Hygienic design
Pasteurizers	1/2″ Class 150 to 1/4″ tube	SS304	General purpose

Water Treatment

Application	Flange-Tube Combo	Material	Special Requirements
Chemical Dosing	1/2″ Class 150 to 1/4″ tube	SS316	Chemical resistant
Filter Controls	1/2″ Class 150 to 1/4″ tube	SS304	General purpose
RO Systems	3/4″ Class 300 to 1/2″ tube	SS316	High-pressure

Custom Options

Special Configurations

Option	Description	When to Specify
Multiple Tube Ends	One flange with multiple tube fittings	Manifold applications
Extended Length	Longer body for special spacing	When standard length doesn’t fit
Special Materials	Exotic alloys for extreme service	Highly corrosive fluids
Special Finishes	Electropolish, passivation, coating	Hygienic or anti-corrosion
Special Marking	Custom tagging, laser marking	Project requirements
Special Cleaning	Oxygen cleaning, ultra-clean	Oxygen, semiconductor
Special Testing	Enhanced NDT, third-party witness	Critical service
Special Packaging	Cleanroom packaging, export crating	Sensitive applications

Available Modifications

Flange facing modifications (special finish, extra smooth)
Tube end modifications (longer ferrule set, special ferrule materials)
Body modifications (purge ports, drain connections, mounting brackets)
Identification (customer part numbers, trace codes, color coding)

Quality Assurance

Standard Quality Package

Item	Included
Material Test Certificates (EN 10204 3.1)	✓
Dimensional Inspection Report	✓
Pressure Test Certificate	✓
Visual Inspection Report	✓
Heat Number Traceability	✓
PMI Report (for alloys)	✓
Country of Origin Certificate	✓

Premium Quality Package (Optional)

Item	Included
All Standard Items	✓
NDT Reports (DPT, UT, RT)	Optional
Third-Party Inspection	Optional
Weld Maps (if applicable)	Optional
Welding Certificates	Optional
NACE Compliance Report	Optional
PED Documentation	Optional
CRN Registration	Optional

Why Choose Samvay Fluid Tekniks Inc.?

Integrated Design Expertise: We specialize in combining flange standards with tube fitting technology. Our engineers understand both worlds and ensure perfect integration.
One-Piece Construction: Unlike welded assemblies, our connectors are machined from solid barstock, eliminating potential leak paths and ensuring highest integrity.
Full Traceability: Every connector comes with complete material certification and test reports. You know exactly what you’re getting.
Precision Machining: CNC equipment ensures perfect concentricity between flange face and tube fitting centerline, preventing misalignment and stress.
Application Support: Our team helps you select the right combination of flange class, tube size, and material for your specific application.
Global Supply: We export worldwide with proper packaging, documentation, and logistics support.
Competitive Pricing: Direct from manufacturer means no middlemen markups. Volume discounts available.

Ordering Information

How to Specify Your Flange-Tube Connector:

1. Flange End Specifications:

Flange size (NPS)
Pressure class (150#, 300#, etc.)
Facing type (RF, RTJ, FF)
Flange standard (ASME B16.5, DIN, etc.)

2. Tube End Specifications:

Tube size (OD in inches or mm)
Tube fitting type (double compression)
Material (must match or be compatible)

3. Material:

Body material (SS316, SS304, etc.)
Any special requirements (NACE, etc.)

4. Quantity Required

Specify the total number of connectors needed.

Global Export Destinations

Samvay flange-tube connectors are trusted by engineers worldwide:

North America:

USA: Houston, New York, Los Angeles, Chicago
Canada: Vancouver, Montreal, Toronto, Calgary
Mexico: Veracruz, Manzanillo, Altamira

Europe:

UK: Felixstowe, Southampton, Immingham
Germany: Hamburg, Bremerhaven
Netherlands: Rotterdam
France: Le Havre, Marseille
Italy: Genoa, Naples
Norway: Oslo, Bergen, Stavanger

Middle East:

UAE: Jebel Ali, Dubai
Saudi Arabia: Dammam, Jubail, Jeddah
Qatar: Mesaieed, Ras Laffan
Kuwait: Shuwaikh, Shuaiba
Oman: Sohar, Duqm

Asia Pacific:

Singapore: Singapore Port
Malaysia: Port Klang, Tanjung Pelepas
Indonesia: Jakarta, Surabaya
Thailand: Laem Chabang
South Korea: Busan, Ulsan
Japan: Tokyo, Yokohama, Osaka
Australia: Sydney, Melbourne, Perth
India: Mumbai, Chennai, Kandla

Africa:

South Africa: Durban, Cape Town
Nigeria: Lagos, Port Harcourt
Egypt: Alexandria, Port Said