Chemical Cleaning Bay, rated to 600,000 kcal/hr hot chemical wash.

Introduction

The Chemical Cleaning Bay is a purpose-built facility installed within an existing 150 ft x 60 ft workshop to perform combined mechanical and chemical cleaning of pipes and fittings made from MS, SS, Copper, Cupro-Nickel, Titanium and Aluminum alloys. It serves vessels — ships, submarines, dredgers and other marine platforms — during both refit and new-construction phases, ensuring components are free of scale, rust, old coatings and other contaminants prior to assembly or repair.

Key features

• Integrated shot blasting & dust extraction: a fully enclosed shot-blasting chamber fitted with high-capacity dust extraction removes oxide scale, rust, paint and other surface deposits effectively.
• Robust construction: cabinet fabricated from 3.15 mm thick, welded and folded MS sheet delivers high strength, rigidity and long service life.
• Sealed access door: hinge-type door (2000 mm W x 4500 mm H) with airtight seals and locking provisions to prevent dust escape and ensure operator safety.
• Hot chemical washing: ON/OFF-type hot water generator delivers up to 600,000 kcal/hr for heated chemical baths, enhancing removal of oils and greases.
• Automated circulation & filtration: 5.5 kW circulation pump (25 m³/hr at 40 mLC) with 1.1 kW make-up pump maintains fluid turnover; scrubber tower and regenerative dryer ensure clean, dry components post-treatment.

Applications

• Petrochemical & chemical processing: cleaning reactor internals, heat-exchanger bundles, fractionation columns and piping to remove catalyst fines, polymer residues, sulfur deposits and corrosion products. Both on-line and off-line wash cycles restore throughput and heat-transfer efficiency without full disassembly.
• Power generation: descaling boiler tubes, economizer coils and feedwater piping to eliminate scale buildup and under-deposit corrosion. Automated chemical skids circulate heated acid/alkaline solutions and use mechanical tube cleaners to restore thermal performance during planned outages.
• Marine & offshore: cleaning shipboard seawater cooling circuits, firemain lines, ballast and bilge piping. Off-hull bays allow caustic detergent washes, followed by high-pressure rinsing and hot-air drying — critical for refit yards and new-build commissioning.
• Municipal & wastewater treatment: flushing clarifier skimmer arms, digester piping and sludge lines of organic and inorganic deposits. Periodic chemical treatments dissolve biofilms and precipitates, reducing downtime and ensuring compliance with discharge permits.
• Food & pharmaceutical (CIP/SIP): validated Clean-In-Place cycles for stainless steel process lines, tanks and filter housings. Sequences of caustic, acid, disinfectant and rinse phases remove product soils and biofilms without disassembly, meeting FDA/GMP traceability requirements.
• Heavy manufacturing & automotive: cleaning hydraulic manifolds, gearboxes, stamping dies and CNC spindles of oils, greases and particulates. Heated alkaline detergents, ultrasonic agitation and closed-loop filtration achieve ISO 4406 cleanliness levels prior to re-assembly or coating.
• Mining & minerals: descaling slurry pumps, flotation tank piping and filter press manifolds of mineral scale and hydroxide deposits. Acid or chelating washes restore pump performance and extend component life.

Principle of operation

• Loading: components placed on trolleys or racks and positioned within the bay.
• Abrasive blasting: high-velocity shot media removes heavy scale and coatings under dust-controlled conditions.
• Chemical bath: hot alkaline or acidic solutions circulate around parts to dissolve oils, greases, oxides and biofilms.
• Rinse & dry: fresh-water rinsing removes residual chemicals; regenerative dryer ensures rapid, residue-free drying.
• Inspection: cleanliness verified per ISO/SAE particle standards before parts are released for service.

Workflow & test procedure

• Pre-inspection: verify material compatibility (MS, SS, Cu-Ni, Ti, Al alloys).
• Blast cycle: select media type and pressure; initiate dust extraction.
• Wash cycle: heat wash tank to setpoint; circulate chemical solution for specified dwell time.
• Neutralization & rinse: adjust pH; flush with demineralized water until residuals are eliminated.
• Drying: activate air dryer; monitor moisture levels until dry.
• Final check: use borescope or particle counter to confirm cleanliness.

Maintenance & safety

• Daily: inspect seals, chemical levels, interlocks and scrubber performance.
• Weekly: replace filter cartridges; test neutralization stations; calibrate pH probes.
• Monthly: service heater coils and dosing pumps; analyze bath chemistry and dispose of spent solutions per local regulations.
• Safety: operators wear acid-resistant PPE (gloves, goggles, respirators); MSDS is maintained for all agents; ventilation and spill containment are ensured throughout.

Conclusion

The Neometrix Chemical Cleaning Bay combines precise shot blasting, heated chemical cleaning, closed-loop fluid management and advanced safety controls into a turnkey solution. By restoring surface condition and meeting stringent cleanliness standards, it maximizes equipment life, reduces unplanned downtime, and supports regulatory compliance across petrochemical, power, marine, municipal, pharmaceutical and heavy-manufacturing industries.