Vitreous Sanitary Appliances (Vitreous China) - - Part 3: Specific Requirements of Squatting Pans

Scope of IS 2556 Part 3: Vitreous China Squatting Pans

This part specifies functional and connecting dimensions for Long, Orissa, and Rural pattern squatting pans.

Key Specifications:

1. Functional Dimensions (Table 1)

2. Connecting Dimensions (Table 2)

Notes:

• Flange is optional.
• Footrest may be flush or raised with permissible clearance.
• Tolerances not specified here follow IS 2556 Part 1.
• Ovality allowed within dimensional tolerances.

Summary Diagram (Mer

Key References (IS 2556 Part 3)

Key Dimensions & Tolerances (Clause 6.1)

Table 1: Functional Dimensions (mm)

Table 2: Connecting Dimensions (mm)

IS 2556 (Part 3) – General Requirements Summary

1. Scope:

   • General requirements (terminology, materials, glazing, defects, thickness, tolerances, performance, test methods) follow IS 2556 Part 1.

2. Dimensions & Tolerances (Clause 6.1):

   • Functional Dimensions (Table 1):

• Connecting Dimensions (Table 2):

IS 2556 (Part 3): Patterns and Sizes of Squatting Pans

1. Patterns & Standard Sizes (Clause 4.1)

2. Functional Dimensions (Table 1, Clause 6.1)

3. Connecting Dimensions (Table 2, Clause 6.1)

| Description | Ref | Long 580

IS 2556 (Part 3): 2004 — Construction and Design Requirements for Squatting Pans

Key Functional Dimensions (Table 1)

Connecting Dimensions (Table 2)

Notes:

• Flange is optional.
• Ovality allowed within specified tolerances.
• Footrest may be flush or raised; clearance allowed

IS 2556 (Part 3): 2004 – Dimensions and Tolerances for Squatting Pans

1. Patterns & Sizes (Clause 4.1)

• Long Pattern: Sizes 580 mm and 630 mm (Fig. 1A & 1B)
• Orissa Pattern: Sizes 580×440 mm and 630×450 mm (Fig. 2)
• Rural Pattern: Size 480 mm (Fig. 3)

2. Functional Dimensions (Table 1)

3. Connecting Dimensions (Table 2)

IS 2556 Part 3: Surface Finish and Glazing Key Points

• Surface Finish Tolerances (Clause 6.2):

  • For long pattern pans:
    • Max deviation from design plane:
      • 6 mm for size 580 mm
      • 10 mm for size 630 mm
  • For Orissa pattern pans:
    • Max deviation: 10 mm

• Glazing Requirements:

  • Inside of the pan must be uniformly smooth and glazed for efficient flushing.
  • No defects or unevenness allowed on the glazed surface.

• Flushing Test (Clause 1.18, IS 2556 Part 1):

  • Interior surface up to 40 mm below flushing rim is smudged with quartz powder (passing 1.18 mm IS sieve).
  • After flushing, no smudge should remain, indicating a smooth, impervious surface.

Summary Table: Surface Finish Tolerances

flowchart TD
    A[Surface Finish] --> B{Pan Type}
    B --> C[Long Pattern 580 mm: ≤ 6 mm deviation]
    B --> D[Long Pattern 630 mm: ≤ 10 mm deviation]
    B --> E[Orissa Pattern: ≤ 10 mm deviation]
    A --> F[Glazing: Uniform & Smooth]
    A --> G[Flushing Test]
    G --> H[Quartz powder smudge applied]
    G --> I[Flush water]
    G --> J[No smudge remains → Pass]

This ensures functional efficiency and quality assurance of vitreous china sanitary appliances per IS 2556.

IS 2556 Part 3: Performance & Flushing Tests Summary

1. Toilet Paper Test (Clause 8.1)

• Fill pan to nominal water seal level.
• Add 6 pieces of usual toilet paper (or 0.05 mm thick polythene sheets, 150 × 115 mm), loosely crumpled.
• Flush pan.
• Repeat 4 times.
• Pass criteria: Pan must discharge full charge at least 3 out of 4 flushes.

2. Flushing Test with Sawdust (Clause 8.4.2)

• Set up pan, cistern/flush valve, and flush pipe as per manufacturer.
• Charge pan to design water seal level.
• Wet internal surface below rim.
• Sprinkle 20 g fine dry sawdust evenly between water level & flushing rim.
• Flush pan.
• Sawdust residue must be cleaned below 40 mm from rim.

3. Splash Test (Clause 8.5.1)

• Use coloured water at design water seal level.
• Flush 5 times.
• Observe splash beyond rim onto floor.
• Acceptable: Up to 10 isolated droplets splashing outside are allowed.

4. Surface Tolerances (Clause 6.2)

• Long pattern top surface variation:
  • Max 6 mm for size 580 mm.
  • Max 10 mm for size 630 mm.
• Orissa pattern max variation: 10 mm.
• Pan inside must be uniformly glazed and smooth for efficient flushing.

5. Sampling & Inspection

• Follow IS 9140 for sampling, process, and lot inspection.

Summary Table: Toilet Paper Test Pass Criteria

flowchart TD
    A[Fill pan with water to seal level] --> B[Add 6 pieces toilet paper]
    B --> C[Flush pan]
   

IS 2556 Part 3: Sampling, Inspection & Lot Inspection

• Sampling & Inspection Method:
  Refer to IS 9140 for detailed procedures on sampling, process inspection, and lot inspection of ceramic sanitary appliances.

• Flush Test Procedure (Clause 8.5.1):

  1. Set up pan, cistern/flush valve, and flush pipe as per manufacturer specs.
  2. Charge pan with colored water to design water seal level.
  3. Clean and dry floor area for splash test.
  4. Activate flush 5 times; observe if water splashes over rim onto floor.
  5. Up to 10 isolated droplets splashing over rim are acceptable (no rejection).

• Rounding Off Test Results:
  Follow IS 2:1960 for rounding off numerical values, maintaining the same number of significant digits as specified.

Summary Table: Flush Splash Test Acceptance

For detailed sampling plans and lot inspection tables, consult IS 9140 directly.

flowchart TD
    A[Start Flush Test] --> B[Setup Pan & Flush Valve]
    B --> C[Fill Pan with Colored Water]
    C --> D[Clean & Dry Floor]
    D --> E[Activate Flush (5 times)]
    E --> F{Droplets splashed > 10?}
    F -- No --> G[Pass Test]
    F -- Yes --> H[Fail Test]

IS 2556 Part 3: Marking and Certification (Clause 10.2 & 10.2.1)

Key Points:

• BIS Certification Mark:

  • Products may bear the Standard Mark as per BIS guidelines.
  • Use of this mark is regulated by the Bureau of Indian Standards Act, 1986.
  • Licence for using the Standard Mark is granted by BIS under specific conditions.

• BIS Role:

  • Statutory body for standardization, marking, and quality certification in India.
  • Holds copyright on all publications; reproduction requires prior written permission.
  • Free use allowed for implementation details like symbols, sizes, or grade designations.

• Contact & Offices:

  • Headquarters: Manak Bhavan, New Delhi
  • Regional Offices: Central (Delhi), Eastern (Kolkata), Northern (Chandigarh), Southern (Chennai), Western (Mumbai)
  • Multiple branch offices across India for support.

Summary Table: BIS Certification Marking

Practical Notes:

• Always verify the product has a valid BIS licence before marking.
• Refer to the latest BIS publications or contact regional offices for updates.
• Maintain compliance with BIS Act and related rules for legal use of marks.

flowchart LR
    A[Manufacturer] --> B{Apply for BIS Licence}
    B -->|Approved| C[Use Standard Mark on Product]
    B -->|Rejected| D[No Marking Allowed]
    C --> E[Product Marketed with BIS Certification]

For detailed conditions and licensing, contact BIS directly or visit www.bis.org.in.