General requirements of suction machine for cleaning sewers, manholes and ancillary structures provided on sewer line and closed stormwater drains

IS 13496: Scope Summary

Scope (General):

• IS 13496 covers essential features of the machine (likely sludge tanks or related equipment) to guide manufacturers and users.
• It ensures compliance with quality, inspection, and testing under BIS supervision.
• The standard promotes uniformity, safety, and reliability in design and manufacture.

Key Specifications:

• Side racks must be provided on both sides of sludge tanks for hose pipe storage (Clause 5.2).
• The standard mark ensures products meet BIS quality and inspection norms.

Important Notes:

• The standard is periodically reviewed and amended.
• Users should refer to the latest edition and amendments.
• Copyright is held by BIS; usage requires permission except for implementation purposes.

Summary Table: Scope Highlights

flowchart LR
    A[Machine Design] --> B[Manufacturers]
    B --> C[Compliance with IS 13496]
    C --> D[BIS Inspection & Testing]
    D --> E[Standard Mark Certification]
    E --> F[Users]
    F --> G[Safe & Reliable Equipment]

This diagram shows the flow from design to user assurance under IS 13496.

IS 13496: Definitions - Key Points

The provided context does not include explicit definitions or formulas from IS 13496. However, based on typical IS standards for structural or mechanical components, definitions usually cover:

• Terminology related to the equipment or structure (e.g., sludge tank, side racks).
• Material specifications and quality control terms.
• Performance criteria and inspection/testing requirements.

General Notes on Definitions in IS Codes:

• Definitions clarify terms used throughout the standard to ensure uniform understanding.
• They often specify dimensions, material grades, and functional descriptions.
• No direct formulas are typically included under "Definitions."

Painting and Finishing (Clause 5.2) Example:

• Side racks must be provided on both sides of sludge tanks for hose pipe storage.

Typical IS Code Definition Table Format (Example):

Summary:

• IS 13496 focuses on structural and functional requirements.
• Definitions ensure clarity of terms like "side racks" and "sludge tank."
• For formulas or detailed tables, refer to specific clauses beyond definitions.

If you need formulas or tables for design or calculation, please specify the clause or topic.

IS 13496: General Design Requirements for Suction Machines

The standard focuses on suction machines used for cleaning sewers, manholes, and ancillary structures. Key general design requirements include:

• Side Racks: Both sides of the sludge tank must have side racks for storing hose pipes (Clause 5.2).
• Painting and Finishing: Proper corrosion protection and finishing as per Clause 5.2.
• Compliance: Machines must comply with BIS quality control and inspection systems.
• Performance: Reference IS 10002:1981 for diesel engine performance (above 20 kW) used in these machines.

Important Notes:

• No direct formulas or detailed tables are provided in IS 13496 for design calculations.
• Design should ensure structural integrity, ease of operation, and maintenance.
• Material selection and corrosion resistance are critical due to sewage environment.
• Follow BIS licensing and marking requirements for quality assurance.

Suggested Design Checklist:

For detailed structural design, refer to relevant IS codes on steel structures and mechanical design.

IS 13496: Technical Specifications Summary

• Painting & Finishing (Clause 5.2):

  • Side racks must be provided on both sides of the sludge tank for hose pipe storage.

• Quality Assurance:

  • Products must comply with BIS inspection, testing, and quality control.
  • Use of Standard Mark is regulated under BIS Act, 1986.
  • Continuous conformity checks by BIS ensure product reliability.

• Revision & Amendments:

  • Indian Standards are periodically reviewed and updated.
  • Users should verify possession of the latest editions or amendments.

Key Notes for Implementation:

BIS Contact Points for Clarifications:

• Central Office: Manak Bhavan, New Delhi
• Regional Offices: Calcutta, Chandigarh, Madras, Bombay
• Branches: Ahmedabad, Bangalore, Hyderabad, Jaipur, etc.

If you need detailed formulas or design tables, IS 13496 primarily specifies construction and quality criteria; refer to related IS codes (e.g., IS 10002 for diesel engines) for performance formulas.

flowchart LR
    A[Sludge Tank] --> B[Side Racks on Both Sides]
    B --> C[Storage of Hose Pipes]
    A --> D[Painting & Finishing]
    D --> E[Quality Control by BIS]
    E --> F[Standard Mark Usage]
    F --> G[Periodic Review & Amendments]

IS 13496: Prime Mover Key Points

• Prime Mover Requirement (Clause 4.1):

  • Use a standard commercial chassis with ≥ 25% overloading capacity.
  • Must conform to IS 10002:1981 (Performance requirements for constant speed diesel engines > 20 kW).

• Engine Standard (IS 10002:1981):

  • Ensures reliability and performance of diesel engines used as prime movers.
  • Covers power output, fuel consumption, and durability.

• Dimensional Constraints:

  • Overall machine dimensions must comply with the Motor Vehicles Act.
  • Should not obstruct traffic or road movement during operation.

• Tipping Gear (Clause 4.6):

  • Front end tipping gear powered by vehicle drive via hydraulic pump.
  • Control valves for tipping, holding, lowering; controls located in driver’s cab.

Summary Table: Prime Mover Specifications

Typical Overloading Capacity Calculation

[ \text{Overloading Capacity} = 1.25 \times \text{Rated Load Capacity} ]

flowchart LR
    A[Prime Mover: Standard Commercial Chassis]
    A --> B[≥ 25% Overloading Capacity]
    A --> C[Engine per IS 10002:1981]
    A --> D[Comply with Motor Vehicles Act]
    A --> E[Tipping Gear: Hydraulic Pump powered by Vehicle Drive]
    E --> F[Control Valves: Tip, Hold, Lower]
    F --> G[Operating Levers in Driver's Cab]

This ensures a robust, compliant prime mover setup for equipment under IS 13496.

IS 13496 - Vacuum Pump Key Points

• Pump Type: Rotary Vane type pumps are recommended for vacuum pumps in sewer cleaning applications.
• Design: Simple, easy to maintain, and run-through arrangements.
• Performance: Must develop sufficient vacuum to suck slurry containing grit and solids from 8 m to 12 m depth using a deep suction device.

Key Specifications for Vacuum Pump (per IS 13496 Clause 4.2)

Vacuum Calculation (Basic)

To lift slurry from depth h (m), vacuum pressure ( P_v ) must overcome atmospheric pressure minus hydrostatic pressure:

[ P_v = P_{atm} - \rho g h ]

Where:

• ( P_{atm} ) = Atmospheric pressure (~101.3 kPa)
• ( \rho ) = Density of slurry (kg/m³)
• ( g ) = 9.81 m/s²
• ( h ) = Suction depth (m)

Conceptual Diagram of Vacuum Pump Setup

flowchart LR
    A[Vacuum Pump] --> B[Deep Suction Device]
    B --> C[Slurry at 8-12 m depth]
    C --> D[Suction Pipe]
    D --> A

This ensures the pump can handle grit-laden slurry at required depths with reliable vacuum generation.

IS 13496 - Suction Pipe Key Specifications & Requirements

• Minimum Diameter: 100 mm for suction pipe.
• Quick Acting Valve:
  • Must prevent leakage of tank contents.
  • Designed for rapid operation.
  • Corrosion and abrasion resistant.
  • Capable of passing sewage with grit and floating fiber up to 50 mm dia.
• Wear Plate: Replaceable wear plate above the suction pipe top end to reduce wear.
• Hose Design:
  • Must withstand 90% vacuum.
  • Corrosion and abrasion resistant material.
  • Equipped with quick-coupling devices for easy connection.
• Loading Hose: Proper hoses should be provided for loading operations.

Additional Notes:

• Suction pipes and valves must ensure no leakage and durability under harsh sewer conditions.
• Valves and hoses must accommodate sewage solids and abrasive materials.

flowchart LR
    Tank -->|Suction Pipe (≥100mm)| Quick_Acting_Valve
    Quick_Acting_Valve --> Hose_Quick_Coupling
    Hose_Quick_Coupling --> Suction_Machine
    subgraph Suction_Pipe_Features
        Wear_Plate
        Corrosion_Resistance
        Abrasion_Resistance
        Vacuum_Resistance(90% Vacuum)
    end

This ensures effective, reliable suction for cleaning sewer systems as per IS 13496.

IS 13496 - Loading Arm Key Points

Clause 4.4: Loading Arm Specifications

• Counterbalanced design: Fully counterbalanced for easy manual operation.
• Rotation: Must rotate around the pivot by 270° smoothly by hand.
• Operation: Lowering and lifting can be manual or hydraulic.
• Ease of use: Designed for effortless manipulation.

Design Considerations (Engineering Insight)

• Counterbalance moment (M):
  [ M = W \times d ]
  Where:
  • ( W ) = weight of the arm
  • ( d ) = distance from pivot to center of gravity of the arm
• Ensure counterweight balances this moment for smooth rotation.

Additional Related Specs (from Clause 4.3 & 4.6)

• Suction pipe min dia: 100 mm with quick-acting valve.
• Hose pipe designed for 90% vacuum, corrosion & abrasion resistance.
• Hydraulic tipping gear powered by vehicle drive with control valves.

Summary Table: Loading Arm Requirements

flowchart LR
    A[Loading Arm] --> B{Rotation}
    B -->|Manual| C[270° rotation]
    B -->|Hydraulic| C
    A --> D[Counterbalance]
    D --> E[Weight & Distance balance]
    A --> F[Suction Pipe]
    F --> G[Min dia 100 mm]
    F --> H[Quick acting valve]

For detailed design, calculate moments and select counterweights accordingly to ensure smooth hand operation as per IS 13496 Clause 4.4.

IS 13496 - Tipping Gear Key Specifications and Formulas

1. Tipping Gear Requirements (Clause 4.6)

• Location: Front portion of the tank.
• Power Source: Hydraulic pump powered by the vehicle drive.
• Controls: Control valves for tipping, holding, and lowering.
• Operation: Levers located inside the driver's cab for convenience.

2. Design Considerations

• Safety Factor: Tank and tipping gear designed for 4× operating pressure (Clause 4.5).
• Load Distribution: Rear two-thirds volume carry solids; sludge screen divides this further.
• Back Door: Must have reliable clamping; operable manually or hydraulically for tipping.

3. Hydraulic System Design (General Engineering)

• Hydraulic Pressure (P): Must overcome tank weight and friction.

• Force (F) required to tip:

  [ F = \frac{W \times d}{r \times \eta} ]

  Where:

  • ( W ) = weight of tank + contents
  • ( d ) = distance from tipping pivot to center of gravity
  • ( r ) = hydraulic cylinder effective lever arm
  • ( \eta ) = mechanical efficiency (typically 0.85 to 0.95)

• Cylinder Sizing:

  [ A = \frac{F}{P} ]

  Where:

  • ( A ) = cylinder piston area
  • ( P ) = hydraulic pressure (design pressure / safety factor)

4. Control Valve Functions

• Tip: Open valve to extend cylinder.
• Hold: Lock valve to maintain position.
• Lower: Open valve to retract cylinder.

Summary Table: Tipping Gear Design Parameters

flowchart LR
    A[Vehicle Drive] --> B[

IS 13496 - Discharge Pipe Key Specifications:

• Minimum Diameter: 100 mm for discharge pipe (Clause 4.7)
• Valve: Quick-acting valve with sufficient bore on rear side/rear door for pressure discharge
• Hoses: Proper hoses to discharge liquid away from vehicle, corrosion and abrasion resistant
• Couplings: All pipes must have quick coupling devices for easy connection/disconnection

Suction Pipe (Clause 4.3) for Reference:

• Minimum diameter: 100 mm
• Quick-acting valve to prevent leakage during loading
• Replaceable wear plate above top end of suction pipe
• Hoses withstand 90% vacuum, corrosion, abrasion; pass sewage with grit and fibers up to 50 mm dia
• Shut-off valve: quick-acting, corrosion and abrasion resistant

Summary Table:

flowchart LR
    Tank -->|Discharge Pipe (≥100mm)| Valve[Quick-Acting Valve]
    Valve --> Hose[Discharge Hose]
    Hose --> Out[Discharge Point Away from Vehicle]

This ensures safe, efficient pressure discharge with easy maintenance and operational safety.

IS 13496 - Accessories (Clause 4.8) Key Specifications

• Full Bore Quick Acting Valves: Installed in sewage paths to ensure no flow resistance or blockage.
• Pressure Relief Valves (2 Nos.):
  • One on Air Pump to prevent overload.
  • One on sewage tank to prevent excess pressure from gas effervescence.
• Vacuum Relief Valve (1 No.): On air pump suction line to limit vacuum level.
• Compound Valve Pressure/Vacuum Gauge: Mounted on tank in a visible position.
• Sludge Trap: Between air pump and tank to capture solids and protect pump.
• Float Cut-out Valve: Seals pump suction line if liquid level exceeds limit, protecting air pump.
• Lubricating System: For air pump to reduce friction losses.
• Rotary Control Valve: Between air pump and tank for pressurizing tank during discharge.
• Level Gauges: Transparent pipes for visual level indication in fresh water and sludge compartments.
• Filling Methods: Overhead, suction, hydrant, or combinations for fresh water tank.
• Inter-connecting Valve: Between front and rear compartments for flushing after discharge.

Summary Table of Accessories

IS 13496 - Painting and Finishing Key Points

• Clause 5.1.1 (Interior Paint):

  • Interior tank surfaces must be sand blasted to clean thoroughly.
  • Apply epoxy or bitumen-based paint for corrosion resistance and durability.

• Clause 5.1.2 (Exterior Paint):

  • Exterior finish paint is at the buyer’s choice, allowing flexibility in color/type.

• Clause 5.2 (Accessories related to finishing):

  • Side racks on both sides of sludge tank for hose pipe storage.

Typical Painting Specification Summary

Notes:

• Epoxy paints provide excellent chemical resistance and adhesion.
• Bituminous paints are good for waterproofing and corrosion resistance.
• Proper surface preparation (sand blasting) is critical for paint adhesion and longevity.

flowchart TD
    A[Tank Surface] --> B[Sand Blasting]
    B --> C{Surface Clean?}
    C -->|Yes| D[Apply Epoxy/Bituminous Paint]
    C -->|No| B
    D --> E[Interior Tank Protection]
    F[Exterior Tank] --> G[Buyer Choice Paint]

This ensures durability and compliance with IS 13496 standards for sludge tanks.