NPRO India

Expanded vs
Welded Joints

Attribute
Expanded
Welded
Seal mechanism
Mechanical interference
Fusion weld (+/- expand)
Hazardous fluids
Often insufficient alone
Preferred
Material impact
316 often acceptable
Favour 316L / low-C
Inspection
Leak test focus
Weld NDT + leak test
Verdict: Match joint method to pressure, fluid hazard and retubing strategy — then pick material accordingly.
Why Specify With NPRO India

Engineering-reviewed tube sheets — not commodity plate

Every enquiry is checked against governing code, material compatibility and manufacturing feasibility before a quote is issued. Use our product, material, grade and standards guides to freeze the RFQ — then confirm with engineering.

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