This standard delineates the precise specifications for glazed fire-clay shower trays used in sanitary setups, covering aspects such as shape, dimension, manufacturing tolerances, surface finish, marking, and quality control procedures. It serves as a vital reference for professionals engaged in the creation, assessment, and approval of fire-clay sanitary shower trays across India.
Overview
This standard delineates the precise specifications for glazed fire-clay shower trays used in sanitary setups, covering aspects such as shape, dimension, manufacturing tolerances, surface finish, marking, and quality control procedures. It serves as a vital reference for professionals engaged in the creation, assessment, and approval of fire-clay sanitary shower trays across India.
Audience
Contents
Structure
This section defines the coverage of the standard, specifying the shapes, dimensions, and acceptable dimensional deviations for glazed fire-clay shower trays. Measurements are in millimeters, following the schematic in Fig. 1. Dimensional tolerances are ±4% for sizes 50 mm and above, and ±2 mm for dimensions below 50 mm. Final numerical values must be rounded according to IS 2-1960, ensuring consistent precision in reporting.
Includes the general stipulations for materials, manufacturing, testing, and inspection, referencing IS 771 Part I (1979) for comprehensive guidelines. Specifies rounding conventions for test data per IS 2-1960 and highlights the necessity to maintain significant figures aligned with the standard.
Outlines adherence to IS 771 Part I for raw material and production processes. Emphasizes dimensional tolerances and rounding off procedures to maintain consistency and precision throughout manufacturing and testing.
Describes the mandatory conformity to the geometric form and size as depicted in Fig. 1, with all dimensions in millimeters. Details the tolerance thresholds for dimensions (±4% for ≥50 mm, ±2 mm for <50 mm) and the rounding rules for test and measurement values.
Specifies that shower trays meeting the standard can bear the ISI Certification Mark, which represents compliance through a regulated system of inspection and quality assurance supervised by BIS under the Indian Standards Institution (Certification Marks) Act. Licensing requirements and marking guidelines are also detailed.
Details the conditions under which manufacturers may apply the ISI mark on shower trays, including licensing from BIS, continuous surveillance, and quality control mandates. It explains the legal framework and the assurance provided by the certification.
Defines the sampling methods and inspection criteria according to IS 771 Part I (1979). Emphasizes the importance of representative sampling, quality control checks, and compliance with dimensional tolerances. Also covers rounding off of results as specified.
Describes the standardized testing procedures referenced from IS 771 Part I and other relevant standards, including mechanical, chemical, and dimensional assessments. Highlights the requirements for test result rounding and conformity evaluation.
Focuses on the exact dimensional requirements and allowable tolerances for shower trays, reiterating the need to follow the measurements in Fig. 1 and the rounding rules per IS 2-1960. This ensures precision and quality in production.
Covers the standards for the surface quality and glazing of fire-clay shower trays, including smoothness, uniform gloss, imperviousness to water and stains, and resistance to abrasion and chemical cleaners. It also discusses the manufacturing steps related to glazing and final quality checks.
Summarizes the quality assurance framework under IS 771 Part 5, referencing Part I for detailed procedures. It highlights the role of ISI certification, continuous monitoring by BIS, and strict adherence to rounding and inspection protocols to maintain consistent product quality.
Frequently Asked
IS 771 Part 5 specifies that shower trays must conform to the shape and size illustrated in Fig. 1, usually rectangular or square with a gently sloped base for effective drainage. All dimensions are expressed in millimeters and must strictly adhere to the defined tolerances to ensure uniformity and proper fit.
The glazed fire-clay used for shower trays should exhibit high durability, low water absorption (typically not exceeding 6%), resistance to thermal variations, and chemical resistance against common cleaning agents. The glaze must be smooth, uniform, and free of defects to maintain hygiene and impermeability.
Manufacturers of shower trays conforming to IS 771 Part 5 may apply the ISI Certification Mark, which signifies compliance verified through BIS-supervised inspection and testing. This mark is governed by the Indian Standards Institution (Certification Marks) Act and requires manufacturers to obtain proper licensing, undergo continuous surveillance, and maintain quality control standards.
Testing and inspection follow the guidelines set in IS 771 Part I (1979), including representative sampling, mechanical and chemical testing, and dimensional verification. Test results must be rounded as per IS 2-1960, and products undergo continuous quality checks supervised by BIS to ensure conformity with the standard.
Dimensional tolerances include ±4% for dimensions equal to or greater than 50 mm, and ±2 mm for dimensions under 50 mm, as per the standard's specifications. Surface finish must be uniform and smooth, with allowances for skid grooves where applicable. These tolerances ensure precise manufacturing and functional performance.
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