corrosiveH₂SO₄CAS 7664-93-9
Valves for Sulphuric Acid (H₂SO₄) Service
Sulphuric acid is one of the most widely used industrial chemicals. Corrosivity varies dramatically with concentration: dilute acid (<50%) is highly aggressive to most metals; concentrated acid (>93%) passivates carbon steel but attacks stainless steels.
Pressure Range
0.5–25 bar (7–360 psi) - process dependent
Temperature
Ambient to 80°C typical; up to 200°C in some processes
Industries
Chemical, Fertiliser, Mining (acid leach)
What valves are used for Sulphuric Acid (H₂SO₄) service?
PTFE-lined ball valve are recommended for Sulphuric Acid (H₂SO₄) service: Full bore, zero dead-legs, PTFE lining handles all concentrations.
Key Properties - Sulphuric Acid (H₂SO₄)
- Highly corrosive at dilute concentrations (<50%)
- Carbon steel passivates above 78% concentration
- Stainless steel 316 acceptable up to ~20% at low temperature
- Generates heat on dilution - thermal shock risk
- Strong oxidiser at high concentrations
Vajra Industrial Solutions manufactures and supplies valves for Sulphuric Acid (H₂SO₄) service — including ptfe-lined ball valve — in corrosion-appropriate materials selected for the operating conditions described here, with full material and test documentation.
Need valves for Sulphuric Acid (H₂SO₄) service?
Send your fluid conditions — we'll recommend the right valve, material and standard, with a 24-hour quote.
Material Compatibility - Sulphuric Acid (H₂SO₄)
Ratings are indicative. Actual compatibility depends on concentration, temperature, velocity, and presence of contaminants. Always consult corrosion tables or a materials engineer.
| Material | Rating | Notes |
|---|---|---|
| Carbon Steel (WCB/A105) | Good | Only for >93% concentrated acid at ambient temperature. Not for dilute acid. |
| SS 316L | Fair | Up to ~20% at <25°C. Not recommended above 20% or elevated temperature. |
| Hastelloy C-276 | Excellent | Excellent across all concentrations. Industry standard for dilute H₂SO₄. |
| PTFE-lined | Excellent | PTFE is excellent across all concentrations and temperatures up to 200°C. |
| FRP / PVDF-lined | Good | PVDF and FRP good for <80% concentrations. |
| Ductile Iron | Poor | Not recommended for any concentration. |
| Bronze / Brass | Not Recommended | Severely attacked. Never use copper alloys. |
| Duplex 2205 | Fair | Limited to dilute, cold service only. Verify with corrosion data. |
Recommended Valves
PTFE-lined ball valve
Full bore, zero dead-legs, PTFE lining handles all concentrations
Full selection guidePTFE-lined butterfly valve
Cost-effective for large bore, low-pressure dilute acid
Full selection guideDiaphragm valve (PTFE/EPDM)
No stem packing contact with fluid - ideal for leakage-sensitive service
Full selection guideValves to Avoid
Bronze or brass-bodied valves
Standard SS 316 for concentrated acid above 20%
Rubber-lined valves (except EPDM in specific concentrations)
Valves with copper alloy trim
Special Considerations
Applicable Standards
Shop Valves for Sulphuric Acid (H₂SO₄) Service
Other Fluid Services
Sulphuric Acid (H₂SO₄) Service — Procurement & Specification
Typical Applications
Available Standards
Material Options
Documentation Available
- -EN 10204 3.1 Material Test Certificates (heat traceable)
- -API 598 hydrostatic shell & seat test reports
- -Dimensional inspection reports
- -Full Manufacturing Data Record (MDR) / data book on request
Inspection Options
- -In-house QC inspection on every order
- -Third-party inspection (SGS / Bureau Veritas / TÜV / DNV) coordination
- -Witness and hold points accommodated on request
Order Quantities
Flexible — from single critical-spare valves to full project lots.
Export
Worldwide export with complete documentation (COO, EUR.1, packing lists) to 20+ countries.
Custom Engineering
Built to your specification — materials, trim, pressure class and special service (NACE, fire-safe, IBR, cryogenic).
Delivery Support
Dispatch from Vadodara, Gujarat with documented lead times and priority handling for urgent requirements.
Engineering references
Connected Engineering
Need Valves for Sulphuric Acid (H₂SO₄) Service?
Tell us your fluid, pressure, and temperature — we'll recommend the right valve, material, and standard, with a 24-hour quote.