Glazed Fire-clay Sanitary Appliances, Part VI: Specific Requirements of Bed Pan Sinks

IS 771 Part 6 (1979) - Introduction: Key Specifications

1. Dimensions and Tolerances (Clause 2.4.2)

• For dimensions < 50 mm: ± 2 mm tolerance
• For dimensions ≥ 50 mm: ± 4% tolerance

2. Rounding Off (Clause 0.3)

• Final test or calculation results shall be rounded as per IS: 2-1960.
• Retain the same number of significant figures as specified values in the standard.

Summary Table: Permissible Tolerances

Notes:

• These tolerances ensure dimensional accuracy for structural elements.
• Rounding rules maintain consistency in reporting test/analysis results.

flowchart TD
    A[Dimension Size] -->|< 50 mm| B[Tolerance ± 2 mm]
    A -->|≥ 50 mm| C[Tolerance ± 4%]
    D[Final Value] --> E[Rounded as per IS:2-1960]
    E --> F[Same significant figures as specified]

This concise framework governs dimensional accuracy and reporting precision in IS 771 Part 6.

IS 771 Part 6 - Scope: Dimensions and Tolerances

• Scope: Specifies permissible dimensions and tolerances for components in reinforced concrete construction.

Key Specifications from Clause 2.4:

Rounding of Test/Analysis Results (Clause 0.3):

• Round off values per IS 2-1960.
• Retain significant figures equal to those in the specified standard value.

Summary:

• Use ±2 mm tolerance for small dimensions (<50 mm).
• Use ±4% tolerance for larger dimensions (≥50 mm).
• Ensure consistent rounding in test results as per IS 2.

flowchart LR
    A[Dimension] --> B{< 50 mm?}
    B -- Yes --> C[Tolerance ± 2 mm]
    B -- No --> D[Tolerance ± 4%]

This ensures compliance with IS 771 Part 6 dimensional accuracy requirements.

IS 771 Part 6: Key Requirements Summary

• Rounding Off (Clause 0.3):
  Final test or calculation values must be rounded per IS: 2-1960.

  • Retain the same number of significant figures as the specified value.

• General Requirements (Clause 2.1):
  Material, manufacturing, testing, sampling, and inspection must comply with IS 771 Part 1 (1979).

• Dimensions and Tolerances (Clause 2.4 & 2.4.2):
  Permissible tolerances on dimensions (see Fig. 1 in the code):

  Dimension Size	Tolerance
  Less than 50 mm	± 2 mm
  50 mm and over	± 4% of dimension

Summary Table:

This ensures dimensional accuracy and consistency for steel tubes as per IS 771 Part 6.

IS 771 Part 6 – General: Key Specifications and Tolerances

1. General Requirements (Clause 2.1)

• Material, manufacture, testing, sampling, and inspection must comply with IS 771 (Part 1)-1979.

2. Dimensions and Tolerances (Clause 2.4 & 2.4.2)

• Permissible tolerances on dimensions (refer Fig. 1 in the code):
  • Dimensions < 50 mm: ± 2 mm
  • Dimensions ≥ 50 mm: ± 4% of the dimension

3. Rounding Off Results (Clause 0.3)

• Final test or analysis values must be rounded per IS 2-1960.
• Retain the same number of significant digits as the specified value.

Summary Table: Dimension Tolerances

This ensures uniformity in manufacturing and quality control for structural steel sections under IS 771 Part 6.

IS 771 Part 6: Bed Pan Sink - Pattern and Size

• Standard Size:
  Bed pan sink size is 600 mm × 450 mm (Clause 2.2, Fig. 1).

• Tolerances on Dimensions (Clause 2.4.2):

  Dimension Range	Permissible Tolerance
  < 50 mm	± 2 mm
  ≥ 50 mm	± 4% of the dimension

• Material:
  Made of fire-clay as per Clause 1.1.

• Additional Notes:

  • Dimensions are in millimeters.
  • Optional flange section shown in Fig. 1 (Section YY).
  • Numerical values rounded off as per IS rules.

flowchart LR
    A[Bed Pan Sink] --> B[Size: 600×450 mm]
    A --> C[Tolerances]
    C --> D{Dimension < 50 mm}
    C --> E{Dimension ≥ 50 mm}
    D --> F[± 2 mm]
    E --> G[± 4%]

This ensures dimensional accuracy and interchangeability in manufacturing bed pan sinks.

IS 771 Part 6: Construction - Key Specifications

• General Requirements (Clause 2.1):
  Materials, manufacturing, testing, sampling, and inspection must comply with IS 771 Part 1 (1979).

• Dimensions and Tolerances (Clause 2.4 & 2.4.2):
  Permissible dimensional tolerances are:

  Dimension Size	Tolerance
  Less than 50 mm	± 2 mm
  50 mm and above	± 4% of dimension

• Construction (Clause 2.3):
  Construction methods should ensure compliance with the above tolerances and general quality requirements.

Summary Table of Tolerances

This ensures dimensional accuracy and quality control during construction as per IS 771 standards.

IS 771 Part 6: Dimensions and Tolerances for Bed Pan Sink

1. Dimensions (Clause 2.4.1)

• Bed pan sink dimensions must conform exactly to Fig. 1 of the code (refer to the standard for exact geometry).

2. Tolerances (Clause 2.4.2)

3. Rounding Off (Clause 0.3)

• Final measured or calculated values should be rounded as per IS 2-1960.
• Retain the same number of significant digits as specified in the standard.

Summary Table for Quick Reference

This ensures manufacturing and quality control maintain proper fit and function of bed pan sinks as per IS 771 Part 6.

IS 771 Part 6 – Marking: Key Points on Dimensions and Tolerances

• Rounding Off (Clause 0.3):
  Final test or calculation values must be rounded per IS 2-1960.

  • Retain the same number of significant digits as specified in the standard.

• Tolerances on Dimensions (Clause 2.4.2):
  For dimensions shown in Fig. 1:

  Dimension Range	Permissible Tolerance
  Less than 50 mm	± 2 mm
  50 mm and above	± 4% of the dimension

• Purpose:
  Ensures uniformity and accuracy in marking dimensions on structural elements per IS 771 Part 6 (1979).

flowchart LR
    A[Measured Dimension] --> B{Dimension < 50 mm?}
    B -- Yes --> C[Tolerance ± 2 mm]
    B -- No --> D[Tolerance ± 4% of dimension]
    C & D --> E[Apply rounding as per IS 2-1960]

Use these tolerances to verify compliance in marking dimensions on structural steel sections.

IS 771 Part 6: Sampling and Inspection - Key Points

1. General Requirements (Clause 2.1)

• Sampling and inspection must comply with IS 771 Part 1 (1979).
• Material, manufacturing, and test methods follow the general guidelines in Part 1.

2. Dimensions and Tolerances (Clause 2.4)

• Tolerances on dimensions (Fig. 1 reference):

3. Rounding Off Results (Clause 0.3)

• Final test values must be rounded as per IS 2:1960.
• Retain the same number of significant digits as specified in the standard.

Summary Table for Tolerances:

This ensures inspection results are consistent and within acceptable limits for quality control.

flowchart TD
    A[Sampling & Inspection] --> B[Material & Manufacture per IS 771 Part 1]
    B --> C[Measure Dimensions]
    C --> D{Dimension < 50 mm?}
    D -- Yes --> E[Tolerance ± 2 mm]
    D -- No --> F[Tolerance ± 4%]
    E & F --> G[Check compliance]
    G --> H[Round off results as per IS 2:1960]

IS 771 Part 6 (1979) - Methods of Test: Key Points

• General Reference: Testing methods conform to IS 771 Part I (1979), which outlines material, manufacture, sampling, inspection, and test procedures.

• Rounding Off Results:
  Follow IS 2:1960 for rounding test results:

  • Round final values to the same number of significant figures as the specified standard value.
  • Ensures consistency and comparability of test data.

• Typical Test Methods Covered (per IS 771 Part I):

  • Tensile strength
  • Bending tests
  • Hardness measurement
  • Chemical composition analysis
  • Dimensional checks

• Sampling:
  Sampling must be representative as per IS 771 Part I guidelines to ensure test validity.

Summary Table: Rounding Off Test Results (IS 2:1960)

If you need detailed test procedures or specific formulas, refer to IS 771 Part I and IS 2:1960 for rounding rules.