Quick Summary: Kelude Heavy Industry provides explosion-proof crane configuration solutions for hazardous chemical warehousing and logistics operations, covering all four storage zones — Class A, Class B, Class C, and tank farm areas. Solutions accommodate lifting capacities from 1 to 20 tons and spans from 8 to 30 meters, with complete plant lifting equipment investments ranging from approximately $22,000 to $222,000. Class A zones are equipped with Ex d IIC T3 explosion-proof overhead cranes (3–10 t), Class B zones use Ex d IIB T4 explosion-proof electric hoists (2–8 t), Class C zones are fitted with standard explosion-proof cranes (3–16 t), and tank farm areas utilize explosion-proof overhead cranes with specialized spreaders (5–20 t) — meeting the stringent explosion protection, corrosion resistance, and anti-static safety requirements of hazardous chemical storage.
Crane Selection for Hazardous Chemical Warehousing & Logistics
Class A Storage | Class B Storage | Class C Storage | Tank Farm / Pump House
Hazardous chemical warehousing and logistics is one of the most demanding applications for explosion-proof and corrosion-resistant lifting equipment. Warehouses classified under different hazard categories vary significantly in their explosion protection class, material requirements, and anti-corrosion specifications.
Scenario 1 — Class A Storage Zone
• Lifting capacity 1–5 t, explosion-proof electric hoist / LD Type
• Ex d IIB T4 / Ex tb
• Explosion protection for flammable media
• Anti-static / grounding
• Fully sealed electrical system
• Kelude configures Ex d explosion protection + ESD anti-static
Ex d / Anti-Static | Class A | Fully Sealed
Scenario 2 — Class B Storage Zone
• Lifting capacity 2–5 t, explosion-proof electric hoist
• Ex d IIB T4
• Dual explosion-proof and corrosion-resistant protection
• Sealed electrical controls / corrosion protection
• Remote control operation
• Kelude configures explosion-proof + anti-corrosion package
Explosion-Proof + Anti-Corrosion | Class B | Remote Control
Scenario 3 — Class C Storage Zone
• Lifting capacity 2–5 t, LD Type / electric hoist
• Standard dustproof / anti-corrosion protection
• Drum and bag handling
• Corrosion-resistant coating
• Cost-effective and practical
• Kelude configures Class C anti-corrosion solution
Anti-Corrosion | Drum Handling | Cost-Effective
Scenario 4 — Tank Farm / Pump House
• Lifting capacity 1–3 t, explosion-proof electric hoist
• Ex d IIB T4
• Tank-top valve inspection and maintenance
• Corrosion-resistant coating
• Compact low-headroom design
• Kelude configures tank farm explosion-proof + anti-corrosion package
Explosion-Proof | Valve Maintenance | Low Headroom
• Pump room machinery maintenance
• Outdoor rainproof / anti-corrosion
• Kelude explosion-proof hoist configured for tank farm
Tank Farm Explosion-Proof | Outdoor | Pump Room Maintenance
Selection Parameter Comparison Across Four Zones
| Parameter Item | Class A Storage Area | Class B Storage Area | Class C Storage Area | Tank Farm/Pump House |
|---|
| recommended model | Explosion-Proof Hoist/LD Type | Explosion-proof electric hoist | LD Type/Electric Hoist | Explosion-proof electric hoist |
| Lifting Capacity | 1t~5t | 2t~5t | 2t~5t | 1t~3t |
| Explosion Protection Class | Ex d IIB/Ex tb | Ex d IIB | None/Dustproof | Ex d IIB |
| special requirements | anti-static | Explosion-proof+Anti-corrosion | corrosion resistance | Outdoor Rainproof |
| Kelude Scheme | Ex d+ESDanti-static | Explosion-proof+Anti-corrosion Kit | Class CAnti-corrosion | Tank Farm Explosion-proof |
$22,200–$222,500
Total Plant Investment
1–20 t
Lifting Capacity Range
8–30 m (26–98 ft)
Span Range
Ex d IIC T3
Max Explosion Protection Class
C5
Corrosion Protection Level
5,000–50,000 m²
Warehouse Area
Explosion-Proof Requirements by Hazardous Warehouse Class
Class A warehouses store flammable liquids and gases, requiring Ex d IIB T4 explosion protection plus ESD anti-static measures. Class B warehouses store combustible liquids, needing Ex d IIB T4 with corrosion-resistant coating. Class C warehouses store combustible solids, where standard anti-corrosion protection suffices. For tank farms storing bulk hazardous chemicals, explosion-proof hoists are used for valve maintenance on tank tops. Kelude Heavy Industry customizes explosion-proof solutions based on the specific warehouse classification.
Kelude Heavy Industry — Service Advantages
Kelude Heavy Industry has years of experience in crane systems for hazardous chemical warehousing and logistics. We hold a full-range manufacturing license for explosion-proof cranes (Ex d IIC T3, Ex d IIB T4, etc.), and our products are certified by the National Explosion-Proof Certification Center. We deliver specialized explosion-proof lifting solutions for hazardous chemical warehouses in the petrochemical, chemical, and pharmaceutical industries.
Class A Warehouse — IIC Explosion-Proof Solution
Class A hazardous warehouses store flammable and explosive gases (hydrogen, acetylene, and other IIC-class materials). Kelude Heavy Industry equips these facilities with Ex d IIC T3 flameproof cranes, where all electrical components carry full explosion-proof certification. The flameproof motor enclosure withstands internal explosions without propagating the blast, the pendant station features intrinsically safe explosion-proof design, and the electrical control cabinet uses positive-pressure ventilation with nitrogen sealing. The complete crane passes inspection by the National Supervision and Inspection Center for Explosion-Proof Quality.
Class B Warehouse — IIB Anti-Corrosion Solution
Organic solvent vapors in Class B hazardous warehouses (flammable liquids) are corrosive to lifting equipment. Kelude Heavy Industry applies an anti-corrosion coating system consisting of hot-dip galvanized steel structures, epoxy zinc-rich primer, and polyurethane topcoat. Stainless steel electrical cabinets and fasteners, along with galvanized wire rope for rust prevention, ensure long-term durability. The crane's smooth, easy-to-clean surfaces prevent solvent accumulation and corrosion.
Tank Farm — Anti-Static Safety Solution
Loading and unloading operations at hazardous chemical tank farms carry electrostatic discharge risks. Kelude Heavy Industry tank farm cranes feature conductive polyurethane wheels, grounding carbon brushes, and a fully bonded earthing system with grounding resistance ≤4Ω. The lifting spreader uses anti-static copper alloy, and the wire rope and stainless steel hook are fully conductive. Anemometers and wind rail clamps are also installed to ensure safe outdoor operation in tank farm areas.
FAQ
Q: How is the explosion protection class determined for a Class A hazardous chemical warehouse?
A: For Class A warehouses storing flammable gases (hydrogen IIC / acetylene IIC / methane IIA), the explosion protection class is determined per GB 50058. Hydrogen requires Ex d IIC T3 (IIC being the most stringent gas group, T3 temperature class ≤200°C), acetylene requires Ex d IIC T2 (T2 ≤300°C), and methane requires Ex d IIA T1. Kelude configures cranes by zoning according to the explosion protection class of the actual stored media; when multiple media are stored in the same warehouse, the highest class is applied uniformly across the entire configuration.
Q: How often should routine maintenance be performed on warehouse cranes in hazardous chemical storage areas?
A: Annual inspections of explosion-proof cranes are carried out in accordance with ISO 4301 Crane Design Standard and TSG Q7015 (Special Equipment Safety Technical Regulation). The maintenance schedule includes: ① Monthly inspection of the sealing integrity of explosion-proof electrical components and cable condition; ② Quarterly testing of grounding resistance (≤4Ω) and insulation resistance (≥1MΩ); ③ Semi-annual explosion-proof performance testing, covering flameproof joint gaps and fastener torque; ④ Annual load testing and certification review by an accredited explosion-proof certification body. Kelude offers maintenance contracts that cover all of the above test items.
Q: What are the special requirements for anti-static grounding in hazardous chemical tank farm areas?
A: Grounding for loading/unloading operations in tank farms must comply with GB 12158 and GB 50074. The crane grounding resistance shall be ≤4Ω and connected to the tank farm's anti-static grounding network. Kelude's tank farm cranes feature: ① Conductive polyurethane wheels (resistivity ≤10⁶Ω·cm); ② Dual grounding carbon brushes (redundant design); ③ Equipotential bonding of all metallic components; ④ Conductive grease lubrication for wire ropes; ⑤ Copper alloy anti-static lifting spreaders. An online grounding resistance monitoring system is also configured, which triggers an audible and visual alarm and blocks operation when resistance exceeds the limit.
Q: Can a standard explosion-proof crane be used in Zone 22 hazardous areas?
A: Zone 22 (an area where combustible dust is not normally present in the atmosphere, but may occur for short periods under abnormal conditions) requires an explosion protection class of Ex tb or Ex pD, which differs from gas explosion-proof (Ex d) ratings. A standard Ex d gas explosion-proof crane cannot be directly applied to Zone 22—dust explosion-proof requirements mandate surface temperature limits (T120°C) and enclosure protection ratings (IP6X). Kelude offers cranes with combined certification for both gas explosion-proof (Ex d/tb) and dust explosion-proof (Ex tb/tD) applications.
