Asbestos cement building pipes and pipe fittings, gutters and gutter fittings and roofing fittings, Part 1: Pipe and pipe fittings

IS 1626 Part 1: Scope - Key Dimensions and Specifications

The standard covers dimensions for asbestos cement pipes and fittings without beading. Key tables specify dimensions for various pipe components as follows (all dimensions in mm):

1. Single Socketed Pipes (Table 3)

2. Loose Socket (Table 4)

3. Plain Bend (Table 5)

• Thickness (T) varies with size (e.g., 6.5 mm for 50 mm bore).
• Dimensions A, B, D depend on bend angle (92°, 112°, 135°).

4. Swan Neck Offsets (Tables 6 & 7)

• Offsets range from 60 mm to 300 mm with ±5 mm tolerance.
• Thickness T and dimension A provided per nominal size.

5. Junctions (Tables 9-11)

• Single/double equal and unequal junctions with angles 92°, 112°, 135°.
• Dimensions A, B, C, D vary by size and angle.

Additional Notes:

• All pipes and fittings are supplied without beading.
• Tolerances on offsets: ±5 mm.
• Safety rules sheet per IS 11769 (Part 1):1987 must accompany deliveries.
• Dimensions are critical for ensuring compatibility and proper fitting.

flowchart LR
  A[

IS 1626 (Part 1): 1994 - Key Referenced Indian Standards & Tables

Referenced Indian Standards (Annex A)

Important Dimensions Tables (All dimensions in mm)

IS 1626 Part 1: Material Composition for Asbestos Cement Pipes & Fittings

Material Composition (Clause 4 & 5):

• Asbestos Fibre: Clean, inert aggregate including suitable fibres.
• Cement: Ordinary Portland Cement (IS 269:1989 / IS 8112:1989 / IS 12269:1987), or
  • Portland Slag Cement (IS 455:1989), or
  • Portland Pozzolana Cement (IS 1489 Part 1 & 2:1991), or
  • Rapid Hardening Portland Cement (IS 8041:1990).
• Additives: Pozzolanic materials, pigments, fillers compatible with asbestos cement.
• Note: No addition of pozzolanic materials allowed if using Portland Pozzolana or Slag cement.

Quality:

• Material must be intimately mixed.
• Interior surfaces must be smooth and regular.

Key Specifications Summary

Additional Notes:

• The standard details dimensional tables for pipes and fittings (Tables 3-16).
• Acid resistance test removed; hydraulic bursting test optional.
• Longitudinal bending test applies for pipes ≥ 2.44 m length.

For detailed dimensional tables and figures, refer to Tables 3 to 16 in IS 1626 Part 1.

flowchart LR
    A[Raw Materials] --> B[Mixing]
    B --> C[Asbestos Fibre + Cement + Additives]
    C --> D[Pipe/Fitting Manufacture]
    D --> E[Quality Control]
    E --> F[Final Product]

This ensures durable, corrosion-resistant asbestos cement pipes conforming to IS 1626 Part 1.

IS 1626 Part 1: General Quality and Workmanship Summary

• Material Composition:

  • Inert aggregate of clean asbestos fibre + suitable fibres
  • Cement: Ordinary Portland Cement (IS 269/8112/12269), Portland Slag Cement (IS 455), or Portland Pozzolana Cement (IS 1489 Part 1/2), or Rapid Hardening Portland Cement (IS 8041).
  • Pozzolanic materials, pigments, fillers allowed if compatible; no pozzolanic addition in slag/pozzolana cement.

• Workmanship:

  • Materials must be intimately mixed.
  • Interior surfaces of pipes/fittings must be smooth and regular.

• Dimensional Specifications:

  • Pipes & fittings diameters: 50 mm to 150 mm.
  • Dimensions per Tables 3 to 11 (e.g., single socketed pipes, loose sockets, bends, junctions).
  • Tolerances on offsets ±5 mm.

• Testing & Compliance:

  • Acid resistance test deleted.
  • Hydraulic bursting test optional.
  • Longitudinal bending test for pipes ≥ 2.44 m length.
  • Rounding off test values as per IS 2:1960.

Key Dimensional Table Example (Single Socketed Pipe):

All dimensions in millimetres.

For detailed dimensions and fittings, refer to Tables 3-11 of IS 1626 Part 1:1994.

IS 1626 Part 1: Key Points on Dimensional & Physical Requirements

1. Dimensional Requirements (Clause 5.1)

• Basic Dimensions: As per Table 2 (not fully provided here), dimensions like outside diameter (OD), wall thickness, and length are standardized.
• Other Dimensions (5.1.4): Pipe fittings' dimensions follow specified figures and tables ensuring compatibility.
• Tolerance (5.1.5): Tolerances on dimensions are specified to maintain interchangeability and proper fit.

2. Physical Requirements (Clause 5.2)

• Pipes must meet mechanical properties such as tensile strength, yield strength, and elongation.
• Physical tests include hydrostatic testing and impact resistance as per the standard.

Typical Dimensional Parameters (Example):

Summary Diagram:

graph LR
A[Pipe Dimensions] --> B[Outside Diameter]
A --> C[Wall Thickness]
A --> D[Length]
A --> E[Tolerances]
F[Physical Requirements] --> G[Tensile Strength]
F --> H[Yield Strength]
F --> I[Hydrostatic Test]
F --> J[Impact Test]

For exact values, refer to Table 2 and relevant clauses in IS 1626 Part 1.

IS 1626 Part 1: Sampling, Inspection, and Acceptance

• Sampling & Inspection: Per Clause 5.3, all tests (Clause 5.1 & 5.2) must be conducted on samples selected as per IS 7639:1975. This standard governs sampling procedures, inspection levels, and acceptance criteria for asbestos cement pipes and fittings.

• Manufacturer’s Certificate: The manufacturer must certify conformity to IS 1626 Part 1, assuring quality compliance.

• Dimensions & Tolerances:

  • Refer to Table 2 (Clause 5.1.4) for dimensions and figures of various pipe types (e.g., single socketed pipe, bends, junctions).
  • Tolerances and other dimensional details are specified in Clause 5.1.5.

• Note: Longitudinal bending test (Clause 5.1.4) applies only to pipes ≥ 2.44 m length.

Summary of Acceptance Criteria (from IS

Manufacturer's Certificate - IS 1626 (Part 1): Key Points

1. Accompanying Documents:

• Every delivery of asbestos cement pipes and fittings must include a Safety Rules Sheet as per IS 11769 (Part 1):1987 (Clause 9.1).

2. Dimensions & Specifications:

• Pipes and fittings dimensions must comply with the tables and figures specified in the standard (Clause 5.1.4, Table 2).
• Key tables for dimensions include:
  • Table 3: Single Socketed Pipes
  • Table 4: Loose Socket
  • Table 5: Plain Bend
  • Tables 6 & 7: Swan Neck (various offsets)
  • Table 8: Sanitary Bend
  • Tables 9-11: Junctions and Inverted Junctions
  • Table 12-16: Other fittings (Rain water head, Shoe, Cone cap, etc.)

3. Marking & Licensing:

• Use of the Standard Mark is governed by BIS Act, 1986 (Clause 8.2.1).
• Manufacturer’s certificate should confirm compliance with IS 1626 (Part 1) and include license details for Standard Mark use.

Summary Table Extract (Example: Single Socketed Pipe Dimensions - Table 3)

All dimensions in millimeters.

Checklist for Manufacturer's Certificate:

• Confirmation of compliance to IS 1626 (Part 1):1994.
• Dimensions as per relevant tables/figures.
• Inclusion of Safety Rules Sheet (IS 11769 Part 1).
• BIS Standard Mark license details.
• Declaration of pipe length and test compliance (e.g., longitudinal bending test for pipes ≥ 2.44 m).

flowchart LR
    A[Manufacturing] --> B[Dimension

IS 1626 Part 1: Marking Specifications

According to Clause 8.1 and 8.2 of IS 1626 Part 1:

• Mandatory Markings on Pipes and Fittings:

  • Source of manufacture (manufacturer's name or trademark)
  • Size of the pipe or fitting
  • Date of manufacture
  • Pictorial warning signs as per IS 12081 (Part 2):1987

• Standard Mark (BIS Certification Mark):

  • Usage governed by the Bureau of Indian Standards Act, 1986 (Clause 8.2.1)
  • License conditions available from BIS

Summary Table for Marking Elements

Notes:

• Marking should be clear and indelible.
• Applies to all pipes and fittings.
• Pictorial warnings help in safe handling and use.

flowchart LR
    A[Pipes & Fittings] --> B[Marking]
    B --> C[Manufacturer ID]
    B --> D[Size]
    B --> E[Date of Manufacture]
    B --> F[Pictorial Warning (IS 12081 Part 2)]
    B --> G[BIS Standard Mark (Optional)]

This ensures traceability, compliance, and safety as per IS 1626 Part 1.

IS 1626 Part 1: Safety Rules Sheet - Key Points

• Clause 9.1: Every delivery of asbestos cement pipes and fittings must include a Safety Rules Sheet as per IS 11769 (Part 1): 1987.
• The Safety Rules Sheet covers safe handling, transportation, and installation to prevent health hazards related to asbestos.
• The Standard Mark usage is regulated under the Bureau of Indian Standards Act, 1986 (Clause 8.2.1).

Important Tables (Dimensions & Specifications)

Example: Single Socketed Pipe Dimensions (Table 3)

All dimensions in millimeters.

Summary

• Safety Rules Sheet mandatory with deliveries (per IS 11769 Part 1).
• Detailed dimensional tables for pipes and fittings provided (Tables 3 to 16).
• Use these tables for design, installation, and quality checks.
• Refer to IS 11769

IS 1626 (Part 1) : 1994 - Annex A: List of Referred Indian Standards

Annex A provides essential referenced IS codes for materials and testing related to asbestos cement pipes and fittings:

Key Points:

• These standards cover cement types, testing methods, safety guidelines, and sampling related to asbestos cement products.
• Cement types conforming to IS 269, 455, 8041, 8112, 12269, and 1489 are permitted for manufacturing asbestos cement pipes.
• Safety and testing standards ensure product quality and safe handling of asbestos-containing materials.

Example: Cement Types for Manufacturing

IS 1626 Part 1 (1994) - Annex B: Committee Composition

Annex B lists the members of the Cement and Concrete Sectional Committee (CED 2) responsible for the standard. Key points:

• Chairman: Dr. H. C. Visvesvaraya

• Members represent diverse organizations such as:

  • Central Public Works Department
  • Sardar Sarovar Narmada Nigam Ltd
  • Structural Engineering Research Centre (CSIR)
  • Indian Hume Pipes Co Ltd
  • Ministry of Railways (Research, Designs and Standards Organization)
  • National Council for Cement and Building Materials
  • The Institution of Engineers (India)
  • Various cement companies and engineering firms

• The committee includes Chairman, Members, Alternates, and Member Secretary.

• Members come from government departments, research institutes, industry, and academia.

This composition ensures comprehensive expertise in cement and concrete standards development.

Additional Context (from IS 1626 Part 1):

• The code provides detailed dimensions for asbestos cement pipes and fittings (Tables 3-16).
• Safety rules per IS 11769 (Part 1): 1987 must accompany deliveries.
• Dimensions cover pipes, bends, junctions, cowls, connectors, etc.

Summary Table: Committee Composition Highlights

graph TD
    A[Chairman: Dr. H. C. Visvesvaraya]
    B[Government Bodies]
    C[Research Institutes]
    D[Industry Representatives]
    E[Member Secretary: Director (Civil), BIS]

    A --> B
    A --> C
    A --> D
    B --> E
    C --> E
    D --> E

This structure ensures balanced input from all stakeholders for standard development.