Instrumentation Fittings

Precision tube fittings for instrumentation, process impulse lines, hydraulic circuits, and assemblies that need a reliable connection under pressure.

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Bulkhead union tube fitting · Official catalog example

APPLICATION CONTEXT

Know the application. Then choose the part.

Arcellor Controls' catalogue includes unions, elbows, tees, crosses, reducers, bulkhead fittings, adapters, caps and plugs for connecting instrument tubing and pipework. Compression tube fittings use a ferrule connection, while threaded or welded connections require a matching interface. The pictured bulkhead union is one example, not a specification for the whole range.

Confirm the exact fitting type, material and rating against your drawing before ordering.

SPECIFICATION REVIEW

What to share with the technical desk

Tube outside diameter, wall thickness and connection type
Operating pressure, temperature and process medium
Material grade, documentation and installation constraints

Common catalog considerations

SS 304 / 316 / 316L
NPT / BSP / tube ends
ASTM, ASME, EN

Availability and suitability are confirmed per exact model, not assumed from this family overview.

NORTH AMERICAN PROJECT REVIEW

Details to confirm before you specify.

Share these requirements with the technical desk so the correct drawings and records can be reviewed.

State the required tube outside diameter and wall thickness in fractional inches, where applicable, plus the exact NPT or other end connection. Example sizes are not an availability claim.
If your project calls for an ASME/ANSI pressure class, provide that class, design pressure and temperature, and request the exact model’s rated drawing. A family listing does not establish a pressure class.
For sour service, state whether NACE MR0175 / ISO 15156 applies and request model-specific wetted-material evidence. This page does not claim NACE compliance.

These are selection questions, not published model ratings, stock sizes, interchange guarantees or compliance certifications.

SOURCE CATALOG

Check the official listing

The illustrated item and the broader product family may differ. Refer to the manufacturer's page for the current product listing.

View official Instrumentation fittings listing ↗

NEXT STEP

Send a drawing or product code.

Include the process medium, rating, material, connection, quantity and delivery location for a more useful discussion.

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