Pressed ceramic tiles

IS 15622 Scope: Tiles Sizes and Specifications

The code classifies tiles by water absorption (E) into Groups B I a, B I b, B II, and B III with modular and non-modular sizes.

Key Points:

• Coordinating Size (C) = Work Size (W) + Joint Width (J)
• Work Size (W): Visible face dimensions (length a and width b).
• Joint Width (J): Nominal joint width between tiles, typically 2–5 mm.
• Thickness (d): Specified by manufacturer, includes visible face and rear profile.

Water Absorption Groups & Tables:

Size Selection:

• Modular sizes: Manufacturer chooses work size to allow nominal joint width (1.5–5 mm or 2–5 mm depending on group).
• Non-modular sizes: Work size differs from nominal size by ≤ ±2% and ≤ 5 mm.

Summary Table Example (Group B I b Modular Sizes):

Sampling & Acceptance:

• Per IS 13630 (Part 15).

IS 15622: Key References for Tile Sizes & Specifications

1. Tile Groups by Water Absorption (E):

• Group B III: E > 10%
• Group B II: 3% < E ≤ 6%
• Group B I b: 0.08% < E ≤ 3%
• Group B I a: E ≤ 0.08%

2. Tables for Sizes & Specifications (Clause 4.1 & 5.1):

3. Size & Thickness Guidelines:

• Modular Sizes (e.g., Table 5 for B I b):

• Non-Modular Sizes (e.g., Table 6 for B I b):

4. Thickness Specification:

• Thickness includes the visible face profile and rear side.
• Manufacturer specifies thickness, ensuring functional and aesthetic requirements.

Summary:

• Use the appropriate tables based on water absorption group.
• Modular sizes allow standard joint widths (2-5 mm).
• Non-modular sizes have tighter tolerances (±2% and 5 mm).
• Thickness is manufacturer

IS 15622: Definitions & Key Specifications for Tiles

Water Absorption Groups & Tables

Tile Sizes:

• Modular Sizes (preferred) allow nominal joint width 2 to 5 mm.
• Non-modular Sizes: Work size differs from nominal by no more than ±2% and 5 mm.
• Thickness includes visible and rear profiles, specified by the manufacturer.

Example: Modular Preferred Sizes (Group B I b, Table 5)

Summary:

• Clause 4.1: Defines tile groups by water absorption and refers to respective tables.
• Clause 5.1: Specifies dimensional, surface quality, physical & chemical properties tables.
• Manufacturer controls work size and thickness within specified tolerances.

flowchart TD
  A[Water Absorption (E)] -->|E > 10%| B[Group B III]
  A -->|3 < E ≤ 6%| C[Group B II]
  A -->|0.08 < E ≤ 3%| D[Group B I b]
  A

IS 15622: Shapes and Sizes of Tiles

Key Points from Clause 4.1 & Tables

• Tiles are categorized by water absorption (E) into groups:

  • Group B III: E > 10% (Tables 1 & 2)
  • Group B II: 3% < E ≤ 6% (Tables 3 & 4)
  • Group B I b: 0.08% < E ≤ 3% (Tables 5 & 6)
  • Group B I a: E ≤ 0.08% (Tables 7 & 8)

• Modular sizes (preferred) are in Tables 1, 3, 5, 7

• Non-modular sizes (common) are in Tables 2, 4, 6, 8

Modular Preferred Sizes (Example: Group B I b, Table 5)

Non-Modular Sizes (Example: Group B I b, Table 6)

Important Specifications

• Nominal joint width: 2

IS 15622: Key Requirements for Tiles (Water Absorption Groups B I b, B II, B III)

1. Tile Size & Joint Width

• Coordinating Size (C) = Work Size (W) + Joint Width (J)
• Work Size (W) = Visible face dimensions (Length a × Width b)
• Nominal joint width:
  • Group B I b & B II: 2 mm to 5 mm
  • Group B III: 1.5 mm to 5 mm

2. Modular Preferred Sizes (Examples)

3. Non-Modular Sizes

• Manufacturer must ensure the work size differs from nominal size by ±2% and max 5 mm.
• Thickness specified by manufacturer.

4. Sampling & Acceptance

• Per IS 13630 (Part 15).

Summary Formula:

Coordinating Size (C) = Work Size (W) + Joint Width (J)

Where:

• W = a × b (visible length × width)
• J = 2 to 5 mm (typical joint width)

Visual Concept (Mermaid):

flowchart

IS 15622: Marking & Tile Size Specifications

1. Marking (Clause 6.2)

• Tiles may be marked with the BIS Standard Mark indicating compliance with IS 15622.
• Marking ensures traceability and quality assurance.

2. Key Formulas for Tile Sizes

• Co-ordinating Size (C) = Work Size (W) + Joint Width (J)
• Work Size (W) = Dimensions of visible faces (length a and width b)

3. Tile Size Tables (Water Absorption Groups)

4. Important Specifications

• Nominal joint width:
  • Group B III: 1.5 mm to 5 mm
  • Group B I b: 2 mm to 5 mm
• Thickness (d): Specified by manufacturer, includes visible face and rear profile.
• Work size tolerance: ±2% and ±5 mm from nominal size for non-modular tiles.

5. Example: Modular Preferred Sizes for Group B I b (Table 5)

IS 15622: Sampling and Basis for Acceptance

• Clause 5.2 states that sampling and acceptance shall follow IS 13630 (Part 15). Refer to IS 13630 for detailed sampling plans and acceptance criteria.

Key Formulas:

• Co-Ordinating Size (C):
  [ C = W + J ] where,
  (W) = Work Size (visible face dimensions (a \times b))
  (J) = Joint Width (nominal 1.5 mm to 5 mm)

Modular Preferred Sizes (Table 1 excerpt for Group B III, E > 10%):

Notes:

• Final test values should be rounded per IS 2:1960 rules.
• Dimensional & physical property requirements are tabulated in Tables 9 to 12 based on water absorption groups (B III to B I a).
• For detailed sampling procedures and acceptance levels, consult IS 13630 (Part 15).

flowchart TD
    A[Work Size (W)] --> B[Add Joint Width (J)]
    B --> C[Co-Ordinating Size (C) = W + J]
    C --> D

IS 15622 - Designation of Ceramic Tiles (Clause 6.3)

Tiles are designated by type, group, size, and dimensions as follows:

Pressed tile, GL BIII M 15 cm x 15 cm (W 148 mm × 148 mm)

• Type: e.g., Pressed tile
• Finish: e.g., GL (Glazed)
• Group: Based on water absorption (BIII, BII, BIb, BIa)
• Modular Size (M): e.g., 15 cm × 15 cm
• Work Size (W): Actual tile face dimensions in mm (e.g., 148 mm × 148 mm)

Key Specifications & Tables Summary:

Important Formulas:

• Co-ordinating Size (C):

[ C = W + J ]

Where:

• (C) = Co-ordinating size (nominal tile size including joint)
• (W) = Work size (visible face dimension)
• (J) = Joint width (typically 2–5 mm)

Example Table Extract (Group BIb, Modular Sizes):

IS 15622 Annex A: List of Referred Indian Standards for Ceramic Tiles Testing

This annex lists IS standards referenced for testing ceramic tiles under IS 15622:

Additional Reference:

• IS 13712: