Editorial Technical Reference

Soaking Drum

This page explains how Soaking Drum is classified within Leather and Related Product Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

The Soaking Drum is a critical component of the Beamhouse Module in leather manufacturing.

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Soaking Drum in a manufacturing environment
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Product Specifications

Technical details and manufacturing context for Soaking Drum

Definition
The Soaking Drum is a critical component of the Beamhouse Module in leather manufacturing. It is a large, cylindrical, rotating vessel designed to soak raw hides in water and chemical solutions to rehydrate them after preservation, remove dirt and blood, and prepare them for subsequent liming and unhairing processes. Constructed primarily from stainless steel, the drum is built to withstand the corrosive environment of wet processing. The drum's dimensions and capacity are specified as reference ranges: drum diameter typically ranges from 1500 to 3000 mm, drum length from 2000 to 4000 mm, and working volume from 5 to 20 m³. The rotational speed is adjustable between 2 and 10 rpm to control soaking intensity. Motor power ranges from 5.5 to 22 kW, depending on drum size and load. The maximum load is typically 3000 to 8000 kg of wet hides per batch. The drum operates within a temperature range of 10 to 40 °C for the soaking water. The drum material is specified as SS304 stainless steel (ASTM A240), while the frame is made of Q235B carbon steel (GB/T 700). The total weight of the equipment, including motor and frame, ranges from 5000 to 12000 kg. The footprint (L×W×H) varies from 4000×2000×2500 mm to 6000×3000×3500 mm. The ingress protection rating is IP54 to IP55 (IEC 60529), and the electrical supply is three-phase 380–415 V AC at 50–60 Hz (IEC 60038). These values are reference ranges; actual specifications must be confirmed with the manufacturer for the specific model and application. The drum is designed for integration into a leather processing line, with interfaces for loading, unloading, and connection to water and chemical supply systems. Verification of performance and compliance with relevant standards should be conducted through procurement documentation and on-site testing.
Working Principle
Raw hides are loaded into the drum along with water and soaking agents. The drum rotates slowly, tumbling the hides to ensure uniform contact with the solution. This mechanical action, combined with the chemical agents, facilitates rehydration, cleaning, and the initial removal of soluble proteins and salts. The rotational speed is adjustable to control the intensity of the soaking process. The drum's design ensures that the hides are gently but effectively agitated, promoting even penetration of water and chemicals. The process is batch-based, with each batch typically handling 3000 to 8000 kg of wet hides. The temperature of the soaking solution is maintained within 10 to 40 °C to optimize the rehydration process. The drum's operation is monitored to ensure consistent results, and the equipment is designed for reliable performance in the demanding environment of a tannery.
Common Materials
Stainless Steel
Technical Parameters
ParameterTypical rangeNotes & selection driver
Drum Diameter1500–3000 mmDetermines batch capacity
Drum Length2000–4000 mmAffects hide loading
Working Volume5–20 m³Typical batch size
Rotational Speed2–10 rpmAdjustable for soaking intensity
Motor Power5.5–22 kWDepends on drum size and load
Temperature Range10–40 °CWater temperature for soaking
Maximum Load3000–8000 kgWet hide weight per batch
Drum MaterialSS304Corrosion resistantASTM A240
Frame MaterialQ235BCarbon steel for structureGB/T 700
Weight5000–12000 kgIncluding motor and frame
Footprint (L×W×H)4000×2000×2500–6000×3000×3500 mmSpace required for installation
Ingress ProtectionIP54–IP55Dust and water splash protectionIEC 60529
Voltage380–415 V ACThree-phase power supplyIEC 60038
Frequency50–60 HzCompatible with mainsIEC 60038

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM
  • Drum Shell Part
    Forms the main cylindrical body that contains the hides and liquor.
    Material: Stainless Steel
  • Drive Motor and Gearbox
    Provides controlled rotational motion to the drum.
    Material: Various Metals
  • Manhole/Door
    Opening for loading and unloading hides.
    Material: Stainless Steel
  • Liquor Inlet/Outlet Ports Part
    For filling and draining the soaking solution.
    Material: Stainless Steel

Application & selection

Application Fit & Sizing Matrix

Operational Limits
pressure: Atmospheric (non-pressurized)
flow rate: Batch process - no continuous flow
temperature: Ambient to 40°C (104°F)
drum loading: 60-75% of total volume
rotation speed: 2-8 RPM
slurry concentration: 5-20% solids by weight
Media Compatibility
✓ Chrome tanning solutions ✓ Vegetable tanning liquors ✓ Pickling brines
Unsuitable: Strong oxidizing acids (e.g., nitric acid, concentrated sulfuric acid)
Sizing Data Required
  • Daily hide processing capacity (kg/day)
  • Average hide thickness/size
  • Required soaking cycle time (hours)

Risk, maintenance & compliance

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Corrosion under insulation (CUI)
Cause: Moisture ingress through damaged insulation or cladding leading to localized corrosion of carbon steel shell, accelerated by high temperature cycling and acidic condensate formation.
Internal nozzle weld fatigue cracking
Cause: Thermal cycling and differential expansion between nozzle and drum shell creating cyclic stresses, combined with potential stress concentrations from poor weld geometry or pre-existing defects.
Maintenance Indicators
  • Visible weeping or staining from insulation indicating active corrosion
  • Abnormal drum temperature profile indicating internal fouling or refractory degradation
Engineering Tips
  • Implement comprehensive CUI inspection program with regular insulation condition assessment and removal for visual inspection at high-risk areas
  • Optimize thermal cycling procedures and consider hot bolting strategies during shutdowns to minimize thermal stress on nozzle connections

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards
ASME BPVC Section VIII - Pressure vessels EN 13445 - Unfired pressure vessels

Quoted from the published standard.

Manufacturing Precision
  • Cylindrical shell roundness: +/- 0.5% of nominal diameter
  • Nozzle alignment: +/- 1.5° from design axis
Quality Inspection
  • Hydrostatic pressure test at 1.3x design pressure
  • Ultrasonic thickness testing of shell plates
Technical documentation
Request current drawings, revision history, and a signed specification sheet.
Manufacturing capability
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Inspection readiness
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Supplier transparency
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Manufacturers of Soaking Drum

Manufacturer profiles associated with Soaking Drum.

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Frequently Asked Questions

What is the typical working volume of a soaking drum?

The working volume typically ranges from 5 to 20 cubic meters, depending on the drum size. This determines the batch capacity for soaking hides.

What materials are used for the drum and frame?

The drum is made of stainless steel SS304 (ASTM A240), and the frame is made of carbon steel Q235B (GB/T 700). These materials provide corrosion resistance and structural integrity.

What is the rotational speed range for the drum?

The rotational speed is adjustable from 2 to 10 rpm, allowing control over the soaking intensity. Slower speeds are gentler on the hides, while faster speeds increase agitation.

What electrical supply is required?

The drum requires a three-phase power supply of 380–415 V AC at 50–60 Hz, with an ingress protection rating of IP54 to IP55. Always verify the specific requirements with the manufacturer.

Data basis: editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Related equipment

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Beamhouse Module
View system integration details

Industrial Ecosystem & Supply Chain Structure

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review · Page last updated 13 October 2026

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