vitreous sanitary appliances (vitreous china): Part 5 Specific requirements of laboratory sinks

IS 2556 Part 5 - Scope & Key Specifications for Laboratory Sinks

This part covers sizes, dimensions, finish, and construction of vitreous china laboratory sinks.

Key Dimensions (Table 1 - Laboratory Sinks)

Waste Outlet Hole Dimensions (Table 2)

Additional Notes:

• Waste fittings made of vitreous china are excluded.
• Dimensions align with EN 32 Wallhung Wash Basins for international coordination.
• Sampling and inspection follow IS 9140:1985.
• Rounding off values per IS 2:1960

IS 2556 Part 5: Key References and Dimensions for Laboratory Sinks

1. Waste Outlet Hole Dimensions (Clause 6.2, Table 2)

2. Laboratory Sink Dimensions (Clause 5, Table 1)

3. Sampling & Inspection (Clause 8.1)

• Follow IS 9140:1985 for sampling, process inspection, and lot inspection of laboratory sinks.

4. Related Standards

• IS 2556 Part 1:1994 — General

IS 2556 Part 5: General Requirements for Vitreous China Laboratory Sinks

Key Dimensions (Clause 6.2, Table 2: Waste Outlet Hole)

Sink Sizes (Clause 5, Table 1)

Additional Specifications

• Material & Manufacture: As per IS 2556 Part 1:1994.
• Sampling & Inspection: Follow IS 9140:1985.
• Rounding off: Use IS 2:1960 rules for numerical values.
• Waste Fittings: Vitreous china waste fittings are excluded.

Summary Diagram

IS 2556 Part 5: Sizes and Dimensions for Laboratory Sinks

1. Dimensions of Laboratory Sinks (Table 1, Clause 5)

• a, b: Minimum edge distances (mm)
• c: Minimum depth from top edge (mm)

2. Dimensions of Waste Outlet Hole (Table 2, Clause 6.2)

3. Notes

• Dimensions tolerances must comply with IS 2556 Part 1.
• Waste outlet hole dimensions align with EN 32 (European standard).
• Sizes other than above can be agreed upon between manufacturer and purchaser (Clause

IS 2556 Part 5: Dimensions & Tolerances for Laboratory Sinks

1. Sink Dimensions (Table 1, Clause 5)

• a, b, c are minimum edge and depth dimensions as per Fig.1 in the standard.

2. Waste Outlet Hole Dimensions (Table 2, Clause 6.2)

3. Tolerances & Notes

• Tolerances on dimensions and waste outlet holes must comply with IS 2556 Part 5.
• Other sizes can be made by mutual agreement (Clause 4

IS 2556 Part 5: Construction & Finish Key Points for Laboratory Sinks

1. Waste Outlet Hole Dimensions (Clause 6.2, Table 2)

Note: Amendments have deleted some dimensions (d4, h1) and angle specifications.

2. Laboratory Sink Dimensions (Clause 5, Table 1)

3. General Construction & Finish

• Sinks made of vitreous china.
• Glazing, minimum thickness, tolerances, and defects as per IS 2556 Part 1:1994.
• Waste fittings per IS 2963:1979.
• Sampling and inspection follow IS 9140:1996.

4. Additional Notes

• Final test values rounded per IS 2:1960.
• Dimensions aligned with European standard EN

IS 2556 Part 5: Surface Requirements for Laboratory Sinks

Key Specifications (Clause 6.2 & 6.4.1):

Surface Finish:

• Inside surfaces must be uniform and smooth to ensure efficient draining.
• Glazing and surface finish must conform to IS 2556 Part 1 (General Requirements).

Summary Table: Waste Outlet Hole Dimensions (Clause 6.2)

Notes:

• All dimensions are in millimeters.
• Overflow hole diameter is fixed at 25 mm.
• Sampling and inspection per IS 9140:1985.
• Surface smoothness critical for hygiene and drainage efficiency.

flowchart LR
    A[Waste Outlet Opening] -->|Diameter d| B((46 -3 +2 mm))
    A -->|Reference Diameter d4| C((65 ± 2 mm))
    A -->|Bevelled Max Diameter ds| D((≤ 75 mm))
    A -->|Seating Face Diameter de| E

IS 2556 Part 5 (1994) - Sampling, Process Inspection & Lot Inspection

• Reference Standard:
  Sampling, process inspection, and lot inspection for laboratory sinks are as per IS 9140:1985 (Clause 8.1).

• Key Points from IS 9140:1985 (General Sampling Practice):

  • Sampling is generally based on Acceptable Quality Level (AQL).
  • Inspection plans include single, double, or multiple sampling depending on lot size and criticality.
  • Process inspection involves continuous monitoring of production parameters to ensure conformity.
  • Lot inspection is performed by selecting a sample size from a batch and checking for defects.

• Typical Sampling Table (Example from IS 9140):

• Inspection Criteria:
  • Check dimensions as per Table 1 (sink sizes) and Table 2 (waste outlet hole).
  • Surface finish must be uniform and smooth (Clause 6.4.1).
  • Overflow hole diameter: 25 mm (if provided).

Summary Diagram of Inspection Flow

flowchart TD
    A[Start: Receive Lot] --> B[Sampling as per IS 9140]
    B --> C{Inspect Sample}
    C -->|Acceptable Defects ≤ Ac| D[Accept Lot]
    C -->|Defects > Ac| E[Reject Lot or 100% Inspection]
    D --> F[Process Inspection: Monitor Production]
    E --> F
    F --> G[End]

Note: Always refer to IS 9140

IS 2556 Part 5: Marking and Certification (Clause 9.2)

Key Points on BIS Certification Marking:

• The use of the Standard Mark is governed by the BIS Act, 1986 and related rules.
• Manufacturers must obtain a license from BIS to use the Standard Mark on products.
• Details on licensing conditions are available from the Bureau of Indian Standards directly.
• The product may bear the BIS Standard Mark alongside other markings to indicate conformity.

Relevant Table for Waste Outlet Hole Dimensions (Clause 6.2, Table 2)

Summary Diagram of Waste Outlet Dimensions

graph LR
A[Waste Outlet Opening (d)] --> B[Seating Flange Diameter (d4)]
B --> C[Bevelled Portion Max Diameter (ds)]
C --> D[Seating Face Diameter (de)]
D --> E[Outlet Depth (h)]
E --> F[Gasket Seal Distance (h1)]

Note: For detailed marking specifications and licensing, consult BIS directly. The above table and clause provide essential dimensional controls for sanitary appliances' waste outlets per IS 2556 Part 5.

Committee Composition - IS 2556 (Part 5): 1994

The Sanitary Appliances and Water Fittings Sectional Committee (CED 3) governs the standard, with a detailed committee comprising:

• Chairman: Shri S. Prakash (Delhi Water Supply & Sewage Disposal Undertaking)
• Members: Representatives from Central Public Health, CSIR Institutes, Water Boards, Municipal Corporations, Industry leaders (Hindustan Sanitaryware, Kirloskar Brothers), Research Institutes, and BIS officials.
• Ex-officio Member: Shri J. Venkataraman, Director General, BIS
• Member Secretary: Shri S. S. Sethi, Director (Civil Engineering), BIS

Key Points:

• The committee includes experts from government, research, industry, and standardization bodies.
• Alternate members are nominated for most key representatives.
• The committee ensures comprehensive stakeholder representation for sanitary appliance standards.

Related Tables for Dimensions (Clause 6.2 & 5):

Sink Dimensions (Clause 5):