Inconel Instrumentation Fittings

Inconel tube fittings are precision-engineered connectors that connect, redirect or terminate tubing in high-temperature, high-pressure, and corrosive fluid or gas systems. These components are also known as Inconel instrumentation fittings, which are made from nickel-chromium-based superalloys such as Inconel 600, 625, and 718, which consist of 58-72% nickel, 14-23% chromium, and trace amounts of molybdenum, niobium, and iron. The Inconel tube fittings have a tensile strength up to 1,240 MPa and high oxidation resistance up to 1,093 °C. Inconel tube fittings provide reliable performance in aerospace, oil and gas, chemical processing, and power generation applications where standard stainless steel alloys fail.

Inconel Tube Fitting Prices

Inconel tube fitting prices in India are shaped by 5 procurement variables. Getting a handle on each one prevents budget surprises and helps you compare supplier quotes accurately.

Approximate Price Range

In India, Inconel tube fittings are priced between Rs 3,750 and Rs 6,250 per piece. Ordering in volume from established Inconel tube fittings suppliers brings the per-unit cost down, sometimes considerably, on large project runs.

Factors affecting price

Grade is the biggest cost driver. Inconel 625 and 718 carry a premium over Inconel 600 due to the additional alloying elements. Size and wall thickness follow a 2" XXS fitting, which uses far more material than a 1/4" Schedule 10S piece, and that difference shows up directly in the price. Connection type also matters: double-ferrule compression fittings require tighter machining tolerances than standard threaded fittings, so the unit price is higher. Add PMI testing, third-party inspection, or EN 10204 3.1 certification, and the cost increases further. Bulk orders offset most of these additions.

Inconel Tube Fittings Grades

Inconel tube fittings are stocked and supplied in 6 alloy grades, each matched to a different combination of temperature range, corrosion environment, and pressure class.

Inconel 600 Tube Fittings
Inconel 617 Tube Fittings
Inconel 718 Tube Fittings
Inconel 690 Tube Fittings
Inconel 625 Tube Fittings
Inconel 601 Tube Fittings

Types of Inconel Tube Fittings

Inconel tube fittings are produced in 6 standard configurations, each designed for a specific connection method, pressure ceiling, or installation requirement.

Double Ferrule Compression Fittings
Butt-Weld Pipe Fittings
Bulkhead Tube Fittings
Tube Adapter Fittings
Imperial Fittings
Metric Fittings

Inconel Tube Fittings Specifications

The table below covers the standard grades, dimensional parameters, pressure capabilities, and testing requirements used when specifying Inconel tube fittings for industrial supply and procurement.

Parameter	Specification
Material grades	Inconel 600, Inconel 625
UNS designations	UNS N06600, UNS N06625
Product type	Inconel tube fittings for instrumentation and process tubing
Specification/standard	ASTM B366 / ASME SB366
Size range	1/16" to 2" and 2 mm to 50 mm
Thread types	NPT, BSP, BSPT, UNF, ISO, SAE
Connection types	Compression, ferrule, tube-to-male, tube-to-female, threaded, welding, JIC
Pressure rating	6,000 PSI common; some two-ferrule fittings up to 11,000 psig; high-pressure variants up to 60,000 psig
Performance	Leak-tight, gas-tight, vibration-resistant, high-pressure capable
Corrosion resistance	Resistant to oxidation and corrosion in severe service
Temperature capability	Suitable for extreme temperature environments
Typical applications	Chemical processing, aerospace, marine, and instrumentation systems
Testing/certification	Material test certificates and third-party inspection are commonly provided

Inconel Tube Fittings Size Chart

The size chart below lists tube OD availability alongside the fitting applications for each size, ranging from 1/8" small-bore instrumentation lines up to 2" heavy-duty process connections.

Tube OD	Common availability	Typical use
1/8"	Small-bore instrumentation size	Tube to union, tube to male, tube to female
1/4"	Common small-bore size	Compression and ferrule fittings
3/8"	Common small-bore size	Compression and instrument fittings
1/2"	Common standard tube fitting size	Instrumentation and process tubing
5/8"	Available in some systems	Custom / special tubing service
3/4"	Common medium-bore size	Compression and ferrule fittings
1"	Common larger tube fitting size	Higher-flow tubing service
1 1/4"	Larger tube fitting size	Special / custom fabrication
1 1/2"	Larger tube fitting size	Special / custom fabrication
2"	Largest common tube fitting size	Heavy-duty tube fittings
3 mm	Metric instrumentation size	Ferrule compression fittings
6 mm	Metric instrumentation size	Ferrule compression fittings
10 mm	Metric instrumentation size	Ferrule compression fittings
12 mm	Metric instrumentation size	Ferrule compression fittings
15 mm	Metric instrumentation size	Ferrule compression fittings
25 mm	Metric larger tube size	Process tubing and adaptors
50 mm	Metric largest common tube fitting size	Custom / heavy-duty tube fittings

Schedule Chart Of Inconel Tube Fittings

Match wall thickness to your NPS/OD range using the schedule chart below before specifying an Inconel tube fitting for a pressure class or service condition.

NPS / Tube size	Sch 10S	Sch 40S / STD	Sch 80S / XS	Sch 160	XXS
1/8"	1.24 mm	—	—	—	—
1/4"	1.65 mm	2.24 mm	—	—	—
3/8"	1.65 mm	2.31 mm	—	—	—
1/2"	2.11 mm	2.77 mm	3.73 mm	4.78 mm	4.77 mm
3/4"	2.11 mm	2.87 mm	3.91 mm	5.56 mm	5.57 mm
1"	2.24 mm	3.38 mm	4.55 mm	6.35 mm	6.35 mm
1 1/4"	2.24 mm	3.56 mm	5.08 mm	6.35 mm	6.35 mm
1 1/2"	2.24 mm	3.56 mm	5.16 mm	7.11 mm	7.11 mm
2"	2.77 mm	3.91 mm	6.35 mm	8.18 mm	8.18 mm

Key Features of Inconel Tube Fittings

The 9 key features that make Inconel tube fittings apart from standard stainless steel or carbon steel fittings in demanding service conditions are

High Corrosion Resistance
Temperature Stability
Oxidation Resistance
High Strength
Stress Corrosion Cracking Resistance
Durability and Long Service Life
Non-Magnetic Properties
Excellent Weldability
Thermal Expansion Control

Applications of Inconel Tube Fittings

Inconel tube fittings see active use across 7 industries where corrosion control, pressure integrity, and material longevity cannot be compromised.

Oil and Gas Industry
Chemical and Petrochemical Processing
Aerospace and Aviation Industries
Power Generation Plants
Marine Industry
Cryogenic Applications
Pharmaceutical and Food-Processing Industries

How To Choose The Right Inconel Tube Fittings Supplier And Manufacturer?

The source you choose for Inconel tube fittings affects material quality, delivery reliability, and total project cost. Before raising a purchase order, run through these 4 criteria.

Selecting The Right Supplier And Manufacturer

Make sure the manufacturer can supply the exact grade, OD size, and schedule range your system needs. Also, check that they are ISO 9001 certified and ask for Mill Test Reports (MTRs) and dimensional inspection certificates before you place the order.

Technical Considerations

Pick the fitting type based on 3 operating parameters: temperature, fluid media, and working pressure. Above 6,000 psi, compression or double-ferrule fittings with smooth, polished bores outperform standard threaded fittings in leak-tightness and vibration resistance. Always cross-check the fitting's OD and wall thickness against the tube specification in your system before finalising the order.

Evaluating Supplier Credibility

Before choosing a supplier, review their export documentation, past delivery performance, and customers' feedback. A trustworthy Inconel tube fittings supplier should consistently provide full material traceability, dimensional inspection certificates, and on‑time compliance with ASTM, EN, or DIN standards.

Procurement Strategy

Find suppliers who offer consistent pricing, flexible order sizes, and reliable technical support. Suppliers listed on The Piping Mart provide customised Inconel tube fitting solutions with detailed documentation, ensuring that projects go smoothly from purchase to installation.