The IS 15622:2006 standard outlines the essential criteria for pressed ceramic tiles utilized in flooring, wall cladding, and roofing within India. It defines specifications including tile dimensions, permissible tolerances, mechanical and chemical properties, surface finish, and marking protocols across various water absorption classifications. This guideline is crucial for manufacturers, suppliers, and design professionals to maintain uniform quality and performance.
Overview
The IS 15622:2006 standard outlines the essential criteria for pressed ceramic tiles utilized in flooring, wall cladding, and roofing within India. It defines specifications including tile dimensions, permissible tolerances, mechanical and chemical properties, surface finish, and marking protocols across various water absorption classifications. This guideline is crucial for manufacturers, suppliers, and design professionals to maintain uniform quality and performance.
Audience
Contents
Structure
IS 15622 establishes requirements for pressed ceramic tiles categorized by water absorption into Groups B Ia, B Ib, B II, and B III, covering both modular and non-modular dimensions. Key definitions include Coordinating Size (C) as the sum of Work Size (W) and Joint Width (J). Work Size refers to the visible face dimensions, while Joint Width ranges typically between 1.5 mm to 5 mm depending on the group. Thickness is manufacturer-defined, including visible and rear profiles. Detailed tables specify size options per absorption group.
The standard references IS 13630 parts for testing and details tile groups based on water absorption percentages. Size and property tables are organized per group, distinguishing modular from non-modular sizes. Thickness and size tolerances are specified, with modular tiles designed for nominal joint widths of 2 to 5 mm and non-modular tiles adhering to tighter dimensional limits.
Definitions cover water absorption classifications and associated tables. Modular sizes are preferred with joint widths of 2–5 mm, while non-modular tiles must not deviate beyond ±2% and 5 mm from nominal sizes. Thickness includes the visible face and backing profiles, determined by the manufacturer.
Tiles are divided into water absorption groups with corresponding modular and non-modular size tables. Examples of modular sizes (e.g., Group B Ib) illustrate manufacturer-selected work sizes to accommodate specified joint widths. Non-modular sizes have stricter tolerances to ensure dimensional accuracy.
The document outlines formulas for Coordinating Size as a sum of Work Size and Joint Width. Nominal joint widths vary by group (e.g., 2–5 mm for Groups B Ib and B II). Modular sizes are listed with manufacturer-selected dimensions, while non-modular tiles must comply with strict tolerance limits. Sampling and acceptance testing is as per IS 13630 Part 15.
Tiles may bear the BIS Standard Mark to indicate conformity. Markings include manufacturer details, batch or manufacturing date, and tile designation per Clause 6.3. These markings facilitate traceability and quality assurance.
Sampling and acceptance procedures follow IS 13630 (Part 15). The Coordinating Size calculation and dimensional requirements are reiterated, with examples of modular sizes from Group B III. Test results should be rounded according to IS 2:1960.
Tiles are identified using type, finish, group classification, modular size, and actual work size dimensions. Examples illustrate the naming conventions such as 'Pressed tile, GL BIII M 15 cm x 15 cm (W 148 mm × 148 mm)'. Size, joint width, and thickness specifications are summarized in tables by water absorption group.
Annex A lists the IS standards referenced for various testing methods including dimensional accuracy, water absorption, moisture expansion, thermal expansion and shock, flexural strength, chemical resistance, abrasion resistance, scratch hardness, impact resistance, frost resistance, and sampling. Each part of IS 13630 corresponds to a specific test category.
Frequently Asked
IS 15622 (2006) defines standard pressed ceramic tile sizes commonly including 150x150 mm, 200x200 mm, 250x250 mm, 300x300 mm, and 400x400 mm, with thicknesses typically between 6 mm and 12 mm. Dimensional tolerances are ±0.5 mm for lengths and widths up to 200 mm, ±0.7 mm for sizes above 200 mm, ±0.3 mm for thickness, ±0.3 mm for edge straightness, and ±0.5 mm for squareness (difference between diagonals). These tolerances ensure proper fitting and uniformity during installation while meeting mechanical and surface quality standards.
IS 15622 classifies pressed ceramic tiles into groups depending on their water absorption (E) levels: Very Low Absorption for E ≤ 0.08%, Low Absorption for 0.08% < E ≤ 3%, Medium Absorption for 3% < E ≤ 6%, and High Absorption for 6% < E ≤ 10%. This refined classification enhances selection based on tile durability and suitability for specific environments.
For tiles with water absorption between 3% and 6%, IS 15622 mandates minimum breaking strength values of 200 N for thicknesses up to 7.5 mm and 500 N for thicker tiles. The modulus of rupture averages 30 N/mm² with a minimum of 28 N/mm². Scratch hardness must be at least 7 on the Mohs scale for commercial and 5 for residential tiles. Glazed tiles should meet minimum abrasion resistance classes (IV for commercial, II for residential). Thermal shock resistance requires a minimum of 10 cycles, and crazing resistance for glazed tiles is specified at 4 cycles under pressure. Chemical resistance includes stain resistance, household chemicals, and acids/alkalis with specified minimum classes.
Yes, spacer lug tiles are addressed in IS 15622. Spacer lugs are raised projections approximately 0.6 mm thick on tile edges that maintain a minimum joint width when tiles are installed edge-to-edge. They ensure the grout fully fills the joint without exposing the lug. Alternate spacer systems may be used, with joint widths governed by the manufacturer’s specified work size. Projections less than 0.3 mm thickness are not considered spacer lugs and must not be used for spacing.
IS 15622 requires that pressed ceramic tiles or their packaging display the manufacturer’s name and address, trade mark, country of origin, batch number or manufacturing date, and tile designation as defined in Clause 6.3. This labeling ensures product traceability, quality control, and helps end-users and regulatory bodies verify compliance.
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