Fluid, piping & valves
Instrumentation tube fittings
Instrumentation tube fittings for small-bore process and analyser lines, covering connectors, unions, elbows, tees, plugs and adapters in stainless steel and nickel alloys, with ferrule tube ends and threaded pipe ends.
Overview
Instrumentation tube fittings join the small-bore tubing that links process connections to gauges, transmitters, analysers and control valves. The family brings together twin-ferrule tube fittings with the threaded pipe fittings that go with them: male and female connectors, unions and reducing unions, nipples, bushings, couplings, caps, plugs, elbows, tees and crosses. Stainless steel 304 and 316 are the usual body materials. Carbon steel, mild steel, brass, titanium and nickel alloys are listed for particular media. Sizes run from 1/8 in to 2 in depending on fitting type, with NPT, BSP and BSPT threaded ends.
Selecting instrumentation fittings
Keep tube, ferrule and body material consistent across a line, and match the fitting to tube outside diameter and wall thickness. Check that the thread standard at each instrument or process port is known before ordering, since NPT and BSP threads are not interchangeable. For seawater, chloride or aggressive chemical service, consider a nickel alloy or titanium option.
Range overview
- Types and variants
- Male and Female Connectors
- Unions and Reducing Unions
- Elbows (45 and 90 Degree)
- Tees and Crosses
- Hex Nipples and Bushings
- Couplings and Sockets
- Caps and Plugs
- Hose Nipples
- Nickel-Alloy Instrumentation Fittings
- Materials and grades
- SS 304
- SS 316
- Carbon Steel
- Mild Steel
- Brass
- Titanium
- Inconel
- Monel
- Size range
- 1/8 in to 2 in (Depending on Type)
- Connections and interfaces
- Twin-Ferrule Tube End
- NPT
- BSP
- BSPT
- BSPP
- Features
- Front and Back Ferrule Compression
- Silver-Plated Nut Threads
- Wide Material Choice
Exact specifications depend on the variant, material and size. Confirm ratings and certification against the datasheet or with our engineers before ordering.
Applications
- Analytical and Process Instrumentation
- Gauge and Transmitter Hook-Ups
- Gas Lines
- Pneumatic Connections
- Chemical and Fertiliser Lines
Industries
- Oil and gas
- Petrochemical
- Chemical
- Power generation
- Food processing
- Fertilisers
- Sugar
- Marine
Information that speeds up a quotation
Share what you know. Anything you are unsure of can be marked “not known” — our engineers will help confirm it.
- Tube OD
- Wall thickness
- Connection
- Material
- Pressure
- Temperature
- Media
- Standard
- Test certificate
Need a datasheet?
Add this family to your enquiry list and mention the variant — we will send the relevant technical documents.
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Related solutions and guides
Frequently asked questions
Which material should I choose for instrumentation fittings?
Stainless steel 316 is the common default for process instrumentation because of its general corrosion resistance. Brass suits low-risk utility air and water lines. Nickel-copper and nickel-chromium alloys or titanium are considered for seawater, chlorides or specific chemicals. Whatever you choose, keep tube, ferrules and body in compatible materials and confirm suitability for your media.
What information is needed for a quote?
Provide a list of fittings by type, tube outside diameter, wall thickness, thread type and size at each threaded port, material, working pressure, temperature and media, and quantities. A hook-up drawing or bill of materials is ideal. You can request material test certificates with the supply.
Ready to specify instrumentation tube fittings?
Send the details you have — quantities, sizes, drawings or a part number. Unknowns are fine.