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Instrumentation Tube Fittings Manufacturer & Supplier in India
Doshi Impex India is one of the best suppliers, stockists, and exporters of high-quality instrumentation tube fittings. Serving various booming industrial markets where the world is dependent on them, like oil & gas, pharmaceuticals, and energy plants, the company offers a wide range of reliable instrument tube fittings that meet international standards. With a strong inventory and timely delivery, we ensure clients acquire durable and leak-proof components for their instrumentation and manufacturing needs.
We are here to deliver any type of grade, such as the most demanding SS instrumentation tube fittings and any other grades, with their customized sizes, dimensions, and affordable prices.
Instrumentation tube fittings work on the principle of the mechanical grip that creates an accurate, high-integrity, and leak-proof seal even without the need for welding. Typically, these fittings consist of a head, front ferrule, back ferrule, and a nut. When the nut is tightened, the back ferrule grips the tubing, and the front ferrule creates a seal opposite the appropriate body and tube surface
This double-ferrule workflow ensures reliable sealing, even in high-pressure and vibration-prone environments.
What is Instrumentation Tube Fittings?
Instrument tube fittings are precisely manufactured components used to connect and seal tubes in instrumentation systems such as pipes and tubes. They will give assurance of leak-proof, gain links for fluids or gases under pressure. Normal types add compression, flare, and bite-type fittings.
Mechanism: The instrumentation tube fittings create a seal by compressing a ferrule or flare onto the tube, forming a tight metal-to-metal or metal-to-elastomer seal. This prevents leaks and withstands high pressure and extremely challenging vibration.
- Compression: The nut tightens the ferrule onto the tube, biting and sealing it.
- Flare: Flared tube end clamps facing a conical fitting surface.
- Bite-type: A Sharp ring bites the tube to hold and seal.
- Push-to-connect: O-ring and teeth grip tube for fast or quick sealing and removal.
Principle: These fittings work on mechanical sealing through compression and deformation, carrying strong, reliable connections in critical as well as challenging applications that are in high demand. Assembled from corrosion-resistant tools like stainless steel and other grades, they are effectively found to be very safe while also efficient for fluid and gas transport in industries
Download Instrument Tube Fittings Dimensions
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Types of Instrumentation Tube Fittings
We offer a broad range of instrumentation tube fittings to suit varied industrial requirements:
Technical Specifications of Instrumentation Tube Fittings
| Parameter | Specification Details |
| Product Name | Instrumentation Tube Fittings |
| Size Range | 1/16” to 2” OD (Outer Diameter) / 3mm to 50mm |
| Connection Types | Tube-to-Tube, Tube-to-Male/Female Thread, Tube-to-Weld End |
| Thread Types | NPT, BSPT, BSPP, ISO, SAE, JIC, UNF |
| Pressure Rating | Up to 10,000 psi (690 bar) – depending on size and material |
| Temperature Range | -65°F to 1000°F (-53°C to 538°C) |
| Sealing Mechanism | Dual Ferrule Mechanical Grip |
| Body Materials | SS 304, SS 316/SS 316L, and many other grades of SS Carbon Steel, Brass, Copper, Alloy Steel |
| Ferrule Material | Hardened Stainless Steel, Brass, Alloy Steel |
| Surface Finish | Bright Annealed / Electropolished / Passivated / Shot Blasted |
| End Connection Standards | ASME B1.20.1 (NPT), ISO 7/1, ISO 8434-1, DIN 2353 |
| Compliance Standards | ASTM A182 / A276 / A479, ASME B16.11, ISO 8434-1, DIN, BS EN 10204 |
| Leak Integrity | Zero Leak at Rated Pressure when Properly Installed |
| Reusability | Designed for repeated assembly and disassembly without performance loss |
| Media Compatibility | Suitable for Air, Gas, Hydraulic Oil, Steam, Water, Chemicals, and Instrumentation Fluids |
| Applications | Control Panels, Pneumatic Lines, Hydraulic Systems, Process Instrumentation, Gas Distribution |
| Certifications | ISO 9001:2015, Material Test Certificates (MTC), Pressure Testing, PMI Test, IBR (if required) |
How to Implement the SS Instrumentation Tube Fittings (Seamless & Welded)
Based on Tube Type, Size Range, Pressure Rating & Thread Standard
| Type of Tube | Tube Size | Pressure Ratings | Types of Thread | Applications | Implementation Strategies |
| Seamless | 1/8″ to 2″ (3mm–50mm) | 3000 – 10,000 psi | NPT, BSPT, BSPP | High-pressure fluid lines, gas distribution, analyzers, skids
Refineries, offshore rigs, pharma, chemical dosing |
Secure right ferrule grip and use pressure-rated fittings risen on wall thickness
Use double ferrule for vibration-prone installations |
| Welded | 24mm to 96mm (or custom) | 3000 – 10,000 psi | NPT, BSPT, BSPP (on transitions or flanges) | Large-bore process pipelines, sample extraction loops, high-flow gas lines
Tank farms, reactors, high-pressure steam/water injection |
Use with socket weld or butt weld ends; ensure proper weld certification & alignment
Use heat-affected zone (HAZ) protections and check corrosion allowances |
What are the Dimensional Consideration for Select Instrumentation SS Tube Fittings Installation?
- Tube Outer Diameter (OD) must match the fitting inlet for perfect and proper seal.
- Wall Thickness affects pressure rating – in any case validate with standards (e.g., ASTM A269 for limitless tubing).
- Thread Participation should track standard torque guidelines for NPT/BSPT/BSPP threads; use proper sealants (e.g., PTFE tape or thread compound).
- Clearance Space is needed for wrenches or spanners during installation – plan spacing in accordance.
- Minimum Bend Radius must become secured to ignore tube deformation – scrutinize manufacturer/tubing spec sheets.
- Support Spacing:
- Horizontal runs – maximum 1.5 meters spacing
- Reduce spacing in vibration-prone or high-pressure areas
- Synchronization of fittings and tubing must be exact to block undue stress or leaks.
- Accessibility should be ensured for periodic inspection, tightening, or replacement.
- Skip Over-tightening to forbid thread galling, tube cracking, or seal damage.
Select the Right Fitting For Pressure Class
| Pressure Class (psi) | Fitting Type | Material | Seal Type |
| Up to 3000 psi | Single ferrule compression | SS316 | Metal-to-metal |
| 3000–6000 psi | Double ferrule compression | SS316/316L | Metal-to-metal |
| 6000–10,000 psi | Cone & thread, welded | SS316L / Alloy | PTFE or metal seals |
TYPES OF INSTRUMENTATION TUBE FITTINGS
| Tube-to-Tube Fittings | Tube-to-Male Pipe Thread Fittings | Tube-to-Female Pipe Thread Fittings | End Closures and Caps | Ferrules – Sealing Elements |
| Instrumentation Union
Instrumentation Reducing Union Bulkhead Reducing Union Union Elbow Bulkhead Elbow Instrumentation Union Tee Union Cross Reducing Union Tee |
Male Connector
O-Seal Male Connector Positionable Male Elbow Instrumentation Male Elbow Male Branch Tee Male Run Tee Instrumentation Male Adapter O-Seal Male Adapter Bulkhead Instrumentation Male Connector |
Instrumentation Female Connector
Bulkhead Female Connector Instrumentation Female Run Tee Female Branch Tee Female Manometer Connector 45° Positionable Male Elbow 45° Instrumentation Male Elbow Positionable Male Run Tee Positionable Branch Tee |
Fitting End Closure
Tube End Closure Coupling Cap |
Front Ferrule
Instrumentation Back Ferrule |
Material Used in Tube Fittings
- Stainless Steel 304/Stainless Steel 316/SS 316L: For corrosion resistance & durability.
- Carbon Steel: This can be set as an effective option for non-corrosive environments, also known to be affordable for the systems.
- Alloy Steel: High strength and temperature resistance for demanding industrial applications.
- Decor & Copper: Used in specialized low-pressure systems.
Key Features of Doshi Impex Instrumentation Tube Fittings
- First leak-tight sealing
- Compatibility with stainless steel, alloy, and second tubing assets
- Resistance to corrosion, temperature fluctuations, and pressure surges
- Straightforward installation and maintenance
- Ready to use in various sizes and specifications
Go-to Use Grades and Standards
We ensure that all tube fittings conform to recognized industry standards to guarantee safety and performance:
- ASTM A182, A276
- ASME B16.11, B31.3
- ISO 8434-1
- DIN 2353
- BS EN 10204
Industrial Applications of Instrumentation Tube Fittings
Our instrumentation tube fittings serve major roles in the following industries:
Used in connecting sensors, pressure gauges, and flow meters in chemical and process industries.
Ideal for pneumatic, hydraulic, and inert gas lines, ensuring safe and vibration-resistant performance.
Critical for control panels, analyzer sample lines, and offshore wellhead instrumentation.
Employed in turbine control lines, steam systems, and vitality monitoring setups.
Hygienic fittings for sterile lines, sampling, and CIP/SIP applications.
Instrument bonds for water quality sensors, dosing systems, and filtration units.
Used in labs and R&D facilities for precise measurements and leak testing.
Unified into custom-made modular skids and automatic equipment for instrumentation control.
Why choose Doshi Impex India?
- Trusted Quality:ISO-certified manufacturing mechanisms ensure premium product quality.
- Broad Range:Wide grouping of fittings to meet each instrument's restrictions.
- Customized Strategies:Proficiency in manufacturing fittings as per your custom specifications.
- Competitive Pricing: Top value without compromising quality.
- Timely Delivery:Productive supply chain ensures on-time project completion.
- Skilled person Substitute:An Intelligent sales and technical team to help with your sorting.
FAQs
Q1. What are the distinguishing points comparing compression & flare tube fittings?
Compression fittings use a ferrule to compress & seal the tube, suitable for pressures which can be slightly higher than usual. Flare fittings involve flaring the tube closure, offering prime sealing for high-pressure applications.
Q2. What components are optimal for corrosive environments?
SS 316/SS 316L and alloy steels provide wonderful corrosion resistance in harsh chemical or marine environments.
Q3. Can Doshi Impex manufacture custom fittings?
Yes, we offer customized manufacturing as well as production activities to meet unique measurements or components that are most significant for the projects.
Q4. How do I know which size to order?
Fitting size depends on the tube outer diameter and application pressure. Our technical team can assist with sizing and arrangement.
Q5. Are your fittings compliant with international standards?
Yes, our products comply with pertinent ASTM, ASME, JIS, UNS, DIN standards, & so on. As we are certified with the ISO standards, our whole manufacturing facility follows the standards of the ISO to deliver the best.
CONTACT US TO KNOW THE LATEST PRICE
We offer striving pricing tailored to your volume and project needs. For a meticulous price list or quotation, please contact us or call
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+91 9833907060