Union (Tube to Tube)

Union (Tube to Tube) for leak-tight instrument and hydraulic lines, available on MetalMitra in imperial and metric sizes, with mill-certified traceability on every lot.

Through MetalMitra you can source Union (Tube to Tube) in stainless steel, carbon steel, alloy steel, duplex, nickel alloy and other grades, across a broad range of sizes and pressure ratings.

A straight union joins two tubes of the same OD with compression ends on both sides.

Precision tube fittings are compression fittings that use front and back ferrules to grip the tube and form a leak-tight seal without welding, flaring or threading the tube. They are used on instrumentation, hydraulic, pneumatic, sampling and analyser lines.

Product range

• Connectors — Male and female connectors, port connectors.
• Unions — Straight, reducing and bulkhead unions.
• Elbows, Tees & Crosses — Union and male / female branch fittings.
• Caps, Plugs & Ferrules — End closures and replacement ferrule sets.

Why engineers choose it

• Tube to Tube — Joins two equal tubes.
• Re-Makeable — Can be disassembled and re-tightened.
• Leak-Free Seal — Twin-ferrule grip that stays sealed under vibration.
• No Hot Work — No welding, flaring or threading of the tube needed.

Union (Tube to Tube) Material & Grades

Where it is used

• Instrumentation Lines
• Oil & Gas
• Petrochemical
• Chemical Processing
• Power Plants
• Hydraulic Systems
• Pneumatic Systems
• Analyser & Sampling Systems
• Offshore Platforms
• Pharmaceutical
• Semiconductor & Gas Lines
• Process Skids

Inspection & paperwork

Suppliers on MetalMitra back Union (Tube to Tube) with the checks and paperwork your QA team expects.

• Dimensional & thread gauge inspection
• Ferrule hardness and fit-up check
• Visual inspection
• Positive Material Identification (PMI)
• Pressure / leak testing as applicable
• EN 10204 3.1 Mill Test Certificate
• Heat-code traceability on every body

The MetalMitra advantage

• Checked sellers only — Every supplier profile is screened by MetalMitra before it goes live.
• Faster sourcing — Post one requirement and receive competitive offers without chasing calls.
• Paperwork sorted — MTC 3.1, test reports and TPI arranged as your project demands.
• Global logistics — Seaworthy packing and dispatch to project sites across the world.

Get a quote

Tell us the specification, quantity and destination you need for Union (Tube to Tube). MetalMitra connects you with suppliers who can deliver.

Technical note: Figures shown are indicative. Final acceptance should be based on the applicable standard, approved drawings and the MTC supplied with the material.