The standard defines precise criteria for vitreous china laboratory sinks including their sizes, manufacturing details, surface quality, and waste outlet dimensions. It serves manufacturers, suppliers, and quality controllers to maintain uniformity and ensure plumbing compatibility. This part complements general sanitary ware standards with specifications tailored specifically for laboratory sinks.
Overview
The standard defines precise criteria for vitreous china laboratory sinks including their sizes, manufacturing details, surface quality, and waste outlet dimensions. It serves manufacturers, suppliers, and quality controllers to maintain uniformity and ensure plumbing compatibility. This part complements general sanitary ware standards with specifications tailored specifically for laboratory sinks.
Audience
Contents
Structure
This section outlines the coverage of the standard regarding vitreous china laboratory sinks, focusing on their dimensional ranges, construction features, surface finishes, and waste outlet characteristics.
Key sink sizes and dimensions are tabulated for reference, along with waste outlet hole size standards ensuring proper fitment and drainage.
Details of pertinent dimensions for laboratory sinks and waste outlet holes are provided, aligned with clauses and tables from the standard. Sampling and inspection follow IS 9140:1985, and general requirements conform to IS 2556 Part 1.
This chapter describes the fundamental conditions including material, manufacturing tolerances, sampling protocols, and marking requirements, ensuring sinks meet performance and quality expectations.
Comprehensive tables list the standard sizes with minimum edge thicknesses and depths, alongside waste outlet hole dimensions necessary for compatibility with plumbing fixtures.
Defines permissible dimensional deviations for laboratory sinks and waste outlet holes, emphasizing minimum thicknesses and specific tolerance ranges to maintain interchangeability and quality.
Specifications concerning the fabrication of sinks from vitreous china, glazing thickness, surface smoothness, and compliance with related parts of the standard are detailed here.
Describes mandatory surface smoothness and glazing standards to ensure hygiene, efficient drainage, and aesthetic appearance of laboratory sinks.
Outlines the recommended sampling methods, process inspections, and batch evaluations per IS 9140:1985 to assure consistent product quality.
Details on licensing, use of the Bureau of Indian Standards (BIS) certification mark, and related documentation requirements for compliance are discussed.
Lists members and their affiliations from government, research, industry, and standardization bodies contributing to the development of the standard.
Frequently Asked
According to IS 2556 Part 5 (1994), the standard specifies laboratory sink sizes as follows (Length × Breadth × Height in mm): 400×250×150, 450×300×150, 500×350×150, 600×400×200, and 600×450×200. Minimum edge thicknesses a and b are 15 mm each, and minimum depth c is 90 mm. These sizes comply with laboratory needs and international norms.
The standard provides nominal dimensions with specified minimum thicknesses but does not explicitly state exact tolerance ranges. Waste outlet opening diameter has a tolerance of 46 mm -3/+2 mm, while other dimensions follow general manufacturing tolerances as per IS 2556 Part 1. Final numerical values are rounded per IS 2:1960, and sampling inspections ensure dimensional compliance.
The waste outlet hole in vitreous china laboratory sinks is circular with an internally bevelled edge to facilitate drainage. Key dimensions include a diameter (d) of 46 mm with -3/+2 mm tolerance, seating flange diameter (d4) of 65 ± 2 mm, bevelled maximum diameter (ds) up to 75 mm, seating face diameter (de) minimum 60 mm, and outlet depth (h) ranging from 45 to 50 mm for sinks with integral overflow. The design ensures compatibility with standard waste fittings.
Integral overflow is optional in the sinks per IS 2556 Part 5. If provided, it must be integral to the one-piece sink construction and have a 25 mm diameter overflow hole. The outlet depth (h) for sinks with overflow ranges from 45 to 50 mm, with the overflow projection exceeding this depth. In absence of overflow, the outlet projection must be at least 15 mm to ensure proper drainage.
Sampling, process inspection, and lot inspection for laboratory sinks should follow IS 9140:1985. This involves statistical sampling plans based on lot size and acceptable quality levels, continuous monitoring of manufacturing processes, and batch inspections to verify compliance with dimensional and surface finish requirements. The inspection covers sink dimensions, waste outlet and overflow holes, and overall surface quality.
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