The same physical component is specified completely differently depending on what it serves. Sixteen industries, each with a distinct dominant failure mode, governing code emphasis, and material default.
Two exchangers with identical shell-side and tube-side fluids can still need different tube sheets if they sit in different industries — because the applicable code, inspection regime, and consequence of failure differ.
Fluid chemistry sets the corrosion-resistance requirement, but industry context sets the code, the inspection regime, and the acceptable risk profile around the same physical part. A duplex steel tube sheet handling seawater on an offshore platform is governed by different inspection and documentation requirements than the same material and duty in an onshore desalination plant, even though the corrosion mechanism is identical.
Industry also determines which failure mode actually matters most — thermal fatigue in power, chloride pitting in marine, hygienic design in pharma, sulfide stress cracking in oil & gas. The sixteen industry pages below each open with the failure modes that actually cause replacements in that sector.
Also see material families, inspection methods, and countries we serve.
Sulfide stress cracking, H₂S service
02Wide-ranging acid/base compatibility
03High-temp oxidation, sour service
04Thermal fatigue, cyclic operation
05Chloride pitting, biofouling
06Hygienic design, crevice-free joints
07Surface finish, leachability limits
08Scaling, erosion from juice solids
09Black liquor corrosion resistance
10Chlorine resistance, biofouling
11Cost-optimised, moderate duty cycles
12High-temp hydrogen attack
13Strict code compliance, traceability
14Geothermal brine, biomass steam
15Concentrated brine, chloride stress
16Ammonia and urea compatibility
| Industry | Dominant Failure Mode | Typical Material Default | Governing Emphasis |
|---|---|---|---|
| Oil & Gas | Sulfide stress cracking | Duplex, Alloy Steel | NACE MR0175 hardness limits |
| Power Generation | Thermal fatigue | Carbon/Alloy Steel, Stainless | ASME Section I / VIII cyclic design |
| Marine & Shipbuilding | Chloride pitting | Copper-Nickel, Titanium | Classification society approval |
| Pharmaceutical | Crevice corrosion, contamination | Stainless Steel (316L) | Hygienic/ASME BPE design intent |
| Desalination Plants | Chloride stress-corrosion cracking | Super Duplex, Titanium | Extended design life under brine |
| Refineries | High-temperature hydrogen attack | Alloy Steel, Inconel | API 941 Nelson curve compliance |
Nuclear-sector tube sheets require specific code compliance, material traceability, and documentation packages beyond standard ASME/TEMA supply. Confirm your specific code requirement (e.g. ASME NQA-1) with our engineering team before quoting, as not every material and process combination is qualified for this sector.
It's rarely the material itself — it's the documentation, inspection, and traceability package that differs. Pharmaceutical and nuclear orders typically require additional certified testing, surface finish verification, and material traceability records that add cost independent of the base metal price.
The physical design can sometimes transfer, but the code compliance and inspection documentation usually can't. A tube sheet built for HVAC duty is very unlikely to have the certification package required for a pharmaceutical or nuclear order, even if the dimensions and material match.
Share your industry, fluid service and applicable code — NPRO India's engineering team will confirm the right specification before quoting.
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