Explosion-Proof Motors for Chemical Tanker Cargo Pump System

Project Overview

A 19,800 DWT chemical tanker newbuild at a Chinese shipyard required explosion-proof electric motors for the cargo pump room. The motors needed to comply with both BV classification and IECEx certification for operation in Zone 1 hazardous areas.

Challenge

• Cargo pump room classified as Zone 1 — requires Ex-d (flameproof) enclosure
• IIB T4 gas group rating for chemical cargo compatibility
• BV Type Approval + IECEx dual certification
• High ambient temperature rating (55°C) for tropical trading routes
• Corrosion-resistant construction for chemical environment

Our Solution

Hicool sourced 6 explosion-proof motors from a dual-certified manufacturer (BV + IECEx):

• 6× Ex-d IIB T4 Motors — 132 kW, 3-phase 440V/60Hz
• Cast iron flameproof enclosure with stainless steel hardware
• IP66 protection, F-class insulation, 55°C ambient rated
• Cable glands and junction boxes included (Ex-d certified)
• Individual BV test certificates + IECEx conformity certificates

Results

• 30-day delivery with complete dual certification documentation
• BV surveyor approved at factory inspection — zero non-conformities
• All 6 motors installed and commissioned during sea trials without issues
• Cargo pump performance tests achieved design flow rates

Key Takeaway

Explosion-proof motors for chemical tankers carry some of the most stringent certification requirements in the marine industry. Selecting a manufacturer with existing BV and IECEx approvals eliminates months of certification lead time and ensures compliant supply.