Incoloy Instrumentation Fittings

Incoloy tube fittings are precision-engineered connectors used to join, redirect, or terminate tubing in high-temperature, high-pressure, and corrosive service systems. These components are commonly known as Incoloy instrumentation fittings. The base alloys, Incoloy 800 and 825, contain 30-45% nickel and 19-23% chromium, with additions of iron, molybdenum, and copper. Tensile strength ranges from 520 to 690 MPa depending on grade. These Incoloy tube fittings resist oxidation up to 1000 °C and work well in chemical plants, oil and gas, marine, and power plants where standard stainless steel cannot perform reliably.

Incoloy Tube Fittings Prices

The pricing of Incoloy tube fittings in India depends on 4 key factors. Understanding such factors helps in planning an accurate budget.

Approximate Price Range:

The price of Incoloy tube fittings in India ranges between Rs. 1,875 and Rs. 3,125 per piece. Buying Incoloy tube fittings in bulk reduces the price per piece.

Factors Affecting Price:

Factors affecting the price depend on the alloy grade, size, wall thickness, connection type, and testing or certification, like PMI testing, third-party inspection, and EN 10204 3.1 certification, which can also affect the final price. The Incoloy 825 fittings often cost more than Incoloy 800, as they contain elements such as molybdenum and copper. The larger and thicker fittings are more expensive, as they require more raw material. Double-ferrule compression fittings cost more than standard threaded fittings due to the higher machining accuracy.

Incoloy Tube Fitting Grades

The Incoloy tube fittings are available in 2 primary alloy grades, each of which is designed for a specific combination of temperature range, corrosion environment, and pressure rating.

Incoloy 825 Tube Fittings
Incoloy 800 Tube Fittings

Types Of Incoloy Tube Fittings

Incoloy tube fittings are manufactured in 5 standard configurations, each designed for a specific connection method, pressure ceiling, or installation requirement.

Compression Fittings
Instrumentation Fittings
Hydraulic Fittings
Tube Adapters
Ferrule Fittings

Incoloy Tube Fittings Specifications

The table below covers the standard grades, dimensional parameters, pressure ratings, and corrosion performance used when specifying Incoloy tube fittings for industrial procurement.

Parameter	Specification
Material Grades	Incoloy 800, 800H, 800HT, 825
UNS Designations	N08800, N08810, N08811, N08825
Standard	ASTM B366 / ASME SB366
Size Range	1/16" to 2" and 2 mm to 50 mm
Pressure Ratings	3000 PSI, 6000 PSI, 10000 PSI, 15000 PSI, 20000 PSI, 400 bar
Thread Types	NPT, BSPT, BSPP, SAE, ISO/BSP tu-lok+2
Connection Types	Compression, ferrule, tube-to-union, tube-to-male, tube-to-female, threaded, JIC
Temperature Range	Up to 593 °C for Incoloy 800; up to 1000 °C for Incoloy 800H; suitable for elevated-temperature service
Corrosion Resistance	Oxidation, carburization, chloride, sulfuric/nitric acid resistance, depending on grade
Typical Applications	High-temperature instrumentation, chemical processing, marine service, oil and gas

Incoloy Tube Fittings Size Chart

The size chart below lists tube OD availability from 1/16" to 2" alongside fitting applications for each size, covering both inch and metric dimensions.

Tube OD	Inch Size	Metric Size	Common Incoloy Tube Fitting Use
1/16"	1/16"	1.6 mm	Instrumentation compression fitting
1/8"	1/8"	3 mm	Small-bore tube fitting
1/4"	1/4"	6 mm	Standard instrumentation fitting
3/8"	3/8"	10 mm	Medium-bore compression fitting
1/2"	1/2"	12 mm	Common process and instrument fitting
3/4"	3/4"	16 mm	Larger instrumentation fitting
1"	1"	25 mm	High-flow tube fitting
1 1/4"	1 1/4"	32 mm	Special / larger tube connection
1 1/2"	1 1/2"	38 mm	Special / larger tube connection
2"	2"	50 mm	Largest common tube fitting size

Schedule Chart Of Incoloy Tube Fittings

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

Tube Size	Outside Diameter	Schedule / Wall Thickness
1/2"	0.840"	Sch 5, 10, 20, 40, 80, 160, XXS
3/4"	1.050"	Sch 5, 10, 20, 40, 80, 160, XXS
1"	1.315"	Sch 5, 10, 20, 40, 80, 160, XXS
1 1/4"	1.660"	Sch 5, 10, 20, 40, 80, 160, XXS
1 1/2"	1.900"	Sch 5, 10, 20, 40, 80, 160, XXS
2"	2.375"	Sch 5, 10, 20, 40, 80, 160, XXS
2 1/2"	2.875"	Sch 5, 10, 20, 40, 80, 160, XXS
3"	3.500"	Sch 5, 10, 20, 40, 80, 160, XXS
4"	4.500"	Sch 5, 10, 20, 40, 80, 160, XXS

Key Features Of Incoloy Tube Fittings

The 7 key features below separate Incoloy tube fittings from standard stainless steel or carbon steel fittings in demanding service conditions.

High Corrosion Resistance
Oxidation Resistance
Temperature Stability
Superior Strength
Resistance to Thermal Cycling
Stress Corrosion Cracking Resistance
Compatibility with Harsh Chemicals

Applications Of Incoloy Tube Fittings

Incoloy tube fittings see active use across 7 industries where corrosion control, pressure integrity, and material longevity are non-negotiable.

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

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

Selecting the right Incoloy tube fittings supplier and manufacturer impacts quality, delivery time, and overall cost. Consider these four criteria before choosing a vendor.

Selecting The Right Supplier And Manufacturer

Make sure that the manufacturer supplies the exact grade, OD size, and schedule range the system requires. Check that ISO 9001 certification is in place and request mill test reports (MTRs) and dimensional inspection certificates before placing the order.

Technical Considerations

Select 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 OD and wall thickness against the tube specification in the system before finalising the order.

Evaluating Supplier Credibility

Before selecting a supplier, ensure that you check their documentation, delivery history and customers' feedback. A good Incoloy tube fitting manufacturer offers full traceability and inspection certificates according to ASTM, EN or DIN standards.

Procurement Strategy

Find a supplier that offers stable pricing, flexible order quantities, and proper technical support. Suppliers listed on The Piping Mart provide custom Incoloy tube fittings with complete documentation, which helps in the purchasing and installation process.