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Material Selection Advisor
Three questions to identify the right stainless-steel grade for your deep well submersible pump housing. Decision logic follows AISI/SAE corrosion resistance classifications and industry pump-application practice.
1. Chloride concentration in the water
2. Acid or abrasive conditions
3. Application duty cycle
Recommendation: AISI 304 Stainless Steel
Your application is well within the comfort zone of AISI 304 — the industry-standard cost-effective grade for typical fresh groundwater service.
- Corrosion resistance adequate for standard groundwater
- Lower FOB cost vs 316 or duplex
- Available across all BBP ASJ pump sizes (100ASJ / 150ASJ / 200ASJ / 250ASJ)
- Expected housing life: decades of service under proper sizing
Recommendation: AISI 316 Stainless Steel
Your chloride or mild acid conditions warrant the upgrade to AISI 316 (3 wt% molybdenum addition), which substantially improves pitting corrosion resistance in coastal or brackish service.
- Pitting resistance (PREN approx. 24) significantly higher than AISI 304 (PREN approx. 18)
- Recommended for coastal aquifers, brackish municipal wells, some mining drainage
- BBP 150ASJ / 200ASJ / 250ASJ series all available in 316 per order
- Modest FOB premium over 304; pays back through avoided pitting-induced failure
Recommendation: Duplex or Super-Duplex Stainless
Your severe-service conditions — high chloride combined with acid or abrasive exposure — exceed the practical limits of standard austenitic grades. Duplex (PREN over 35) or super-duplex is warranted.
- Superior pitting and stress-corrosion-cracking resistance vs AISI 316
- Specified for acid mine drainage, offshore, and aggressive oil/gas produced water
- BBP fabricates duplex casings on custom order (foundry plus CNC machining in-house)
- Higher material cost offset by extended service life under severe duty
Send Us Your Water Analysis
Without a water analysis we cannot make a defensible material recommendation. Standard parameters needed: chloride ppm, pH, sulphate, TDS, sediment load (sand g/m³), and temperature range. Most municipal and mining projects already have these values from the drilling report.
Methodology: Decision logic follows industry practice for AISI/SAE stainless steel pitting resistance (PREN: Pitting Resistance Equivalent Number). For borderline cases, BBP sales engineers cross-check against your specific water chemistry and duty cycle before final specification. This tool is for pre-qualification only; the formal material recommendation is issued in our quotation documentation with applicable AISI material certificates.
