Pipeline Pickling & Passivation Services Services in Kolkata

Pipeline Pickling and Passivation for Stainless Steel and Carbon Steel Piping

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About Our Pipeline Pickling & Passivation Services Service in Kolkata

Welding of stainless steel piping creates heat tint and weld oxide that compromises corrosion resistance. Carbon steel piping develops mill scale and rust. Ram Engineering performs acid pickling to remove these oxides, followed by passivation to form a durable chromium oxide layer, restoring full corrosion resistance.

The Kolkata-Haldia corridor is a major industrial belt with steel plants, Haldia Petrochemicals, jute mills, and a busy commercial port. With Dankuni Industrial Complex, Kalyani Industrial Area, Haldia Petrochemical Zone, Falta SEZ, and Bantala Leather Complex driving demand for industrial services, our pipeline pickling and passivation teams are deployed regularly across Kolkata's key manufacturing zones.

Our Pipeline Pickling & Passivation Services Process

  1. Surface contamination assessment
  2. Degreasing pre-treatment
  3. Acid circulation (hydrochloric or nitric/hydrofluoric based on alloy)
  4. Neutralisation and water rinse
  5. Passivation with nitric acid or citric acid
  6. Verification (Ferroxyl test or residual iron measurement)

Key Benefits

✔ Remove weld heat tint from SS piping to restore corrosion resistance
✔ Remove mill scale and rust from CS piping
✔ Passivated surface meets ASTM A967 / ASTM A380 standards
✔ Extend service life of stainless steel pipework significantly
✔ Essential for pharmaceutical, food, and high-purity systems

Industries We Serve in Kolkata

Kolkata's steel, jute, leather, chemicals, and port industries industries rely on reliable pipeline pickling and passivation to maintain uptime and efficiency. Our teams regularly service steel manufacturers, petrochemical processors, jute mills, and port operators across the region.

Pharmaceutical Plants Food & Beverage Chemical Plants Semiconductor Manufacturing Breweries Dairy Processing Offshore Platforms

Industrial Areas We Cover in Kolkata

We provide pipeline pickling and passivation across all major industrial zones in Kolkata including Dankuni Industrial Complex, Kalyani Industrial Area, Haldia Petrochemical Zone, Falta SEZ, and Bantala Leather Complex. On-site service with our mobile equipment — no transport of your oil required.

Frequently Asked Questions

What is the difference between pickling and passivation?
Pickling removes surface oxides and contaminants. Passivation enriches the chromium oxide passive layer after pickling to maximise corrosion resistance.
Can pickling be done in-situ on installed piping?
Yes. We circulate pickling acid through the installed pipe system, then neutralise, rinse, and passivate — no pipe removal needed.
Do you handle the disposal of spent acid?
Yes. We neutralise spent acid on-site and arrange disposal through authorised hazardous waste handlers in compliance with CPCB/SPCB regulations.

Related Services

Get a Free Consultation

Talk to our pipeline pickling and passivation experts about your requirement. We serve Kolkata and all surrounding industrial areas.

📞 +91-99400-49505 ✉ mail@oilfiltration.in 💬 WhatsApp Us

Why Choose Ram Engineering?

  • ✅ 33+ years of industrial expertise
  • ✅ On-site mobile service — no transport needed
  • ✅ Serve all major cities across India
  • ✅ Detailed service reports every time
  • ✅ Rapid deployment — 24–48 hour response
  • ✅ ISO-certified processes and instruments

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