Fabricated PVC-U Fittings for Potable Water Supplies - Specification, Part 2: Specific Requirements for Sockets

IS 10124 (Part 2) : 2009 — Scope & Key Specifications

Scope:

• Specifies dimensions and minimum wall thickness for sockets and sockets with elastomeric sealing ring joints used in cast iron pressure pipes.
• Applies to sockets designed for various working pressures (0.25 to 1.25 MPa).

Key Formulas & Definitions:

• D = Mean socket internal diameter at mid-point (from IS 10124 Part 1)
• L = Minimum socket length (from IS 10124 Part 1)
• t = Minimum wall thickness of socket, calculated as:

[ t = \text{90% of minimum wall thickness of corresponding pipe size and pressure class, rounded up to next 0.1 mm} ]

Tables Summary:

Refer Table 1 for full details.

For Elastomeric Sealing Ring Joint Sockets:

IS 10124 (Part 2): Key References, Formulas & Tables

References (Table 2)

• IS 4985:2000 — Unplasticized PVC pipes for potable water supplies.
• IS 10124 (Part 1):2009 — Fabricated PVC-U fittings for potable water supplies, Part 1: General requirements.
• IS 2:1960 — Rules for rounding off numerical values.

Important Definitions & Parameters

• D = Mean socket internal diameter (mid-point of socket length per IS 10124 Part 1)
• L = Minimum socket length (per IS 10124 Part 1)
• t = Minimum wall thickness of socket, based on 90% of pipe wall thickness rounded to next 0.1 mm

Table 1: Socket Dimensions for Various Nominal Sizes and Working Pressures (in MPa)

Refer to the full table for all sizes.

Table 2: Socket Dimensions for Elastomeric Sealing Ring Joints

| Nominal Size (mm) | Min Socket Length B

IS 10124 (Part 2) - Key Dimensions for Sockets

1. Socket Dimensions (Table 1 & Fig. 1)

• D = Mean socket internal diameter (mid-point of socket length per IS 10124 Part 1)
• L = Minimum socket length (per IS 10124 Part 1)
• t = Minimum wall thickness of socket = 90% of pipe's minimum wall thickness (rounded up to nearest 0.1 mm)

(Refer full Table 1 for all sizes and pressures)

2. Socket for Elastomeric Sealing Ring Joint (Table 2 & Fig. 2)

• Similar parameters with specific B, Min and t for classes 2 to 6 (working pressures 0.4 to 1.25 MPa).

IS 10124 Part 2: Marking Specifications

1. Marking Requirements (Clause 4.1)

Each socket must be clearly and indelibly marked with:

• Manufacturer's name or ID mark.
• Size of the socket and the corresponding IS 4985 class (working pressure).
• Colour code indicating class of fitting:

2. Wall Thickness & Dimensions (Clause 3.2.1 & 3.2.2)

• Minimum wall thickness (t) is 90% of pipe thickness rounded to next 0.1 mm.
• Socket internal diameter (D), length (L), and wall thickness (t) per nominal size are tabulated.

Example from Table 1 (Socket Dimensions):

Example from Table 2 (Elastomeric Seal Socket):

3. BIS Certification Marking (Clause 4.2)

• Sockets may carry the BIS Standard Mark under license per BIS Act, 1986.

Summary Diagram

IS 10124 (Part 2) : 2009 — Manufacture Key Points

1. Socket Dimensions & Wall Thickness (Clause 3.2.1 & Table 1)

• D = Mean socket internal diameter (mid-point of socket length per IS 10124 Part 1)
• L = Minimum socket length (as per IS 10124 Part 1)
• t = Minimum wall thickness of sockets = 90% of minimum pipe wall thickness for the size & pressure class, rounded to next 0.1 mm

(Refer to Table 1 for full sizes & thicknesses)

2. Socket for Elastomeric Sealing Ring Joint (Clause 3.2.2 & Table 2)

• Wall thickness t varies with pressure class (0.4 to 1.25 MPa)
• Minimum socket length B typically 250-600 mm depending on size

| Nominal Size (mm) | Min Socket Length B (mm) | Wall Thickness t (mm) for Working Pressure (MPa) | |----------------

IS 10124 (Part 2): Requirements for Sockets for Elastomeric Sealing Ring Joints

Key Specifications:

• Socket Dimensions must follow Table 2 and Fig. 2.
• Minimum wall thickness (t) is based on 90% of the corresponding pipe's minimum wall thickness, rounded to next 0.1 mm.
• B, Min = Minimum socket length (mm).

Table 2: Socket Dimensions for Elastomeric Sealing Ring Joints (all dimensions in mm)

Important Notes:

• D = Mean socket internal diameter at mid-point (per IS 10124 Part 1).
• Wall thickness excludes the sealing ring groove.
• Sockets are designed to accommodate elastomeric sealing rings ensuring

IS 10124 (Part 2): Wall Thickness Requirements for Sockets

Key Parameters:

• D = Mean socket internal diameter (mid-point of socket length, per IS 10124 Part 1)
• L = Minimum socket length (per IS 10124 Part 1)
• t = Minimum wall thickness of socket, calculated as 90% of the minimum wall thickness of the corresponding pipe size and pressure class, rounded up to next 0.1 mm.

Minimum Wall Thickness (t) for Sockets (Table 1 excerpt):

Minimum Wall Thickness for Elastomeric Sealing Ring Joints (Table 2 excerpt):

IS 10124 (Part 2): Pressure Classes & Color Coding for PVC-U Fittings

Pressure Classes & Corresponding Colors (Clause 4.1)

Key Specifications:

• Each socket must be marked with:
  • Manufacturer's name/mark
  • Size and pressure class (IS 4985 reference)
  • Color code per above table

Minimum Wall Thickness (t) for Socket (from Table 1 & 2)

• Thickness depends on nominal size and pressure class.
• Calculated as 90% of the minimum pipe wall thickness, rounded to next 0.1 mm.
• Example for Nominal Size 50 mm (Class 4, 0.8 MPa): t = 2.1 mm

Dimension Parameters:

• D = mean socket internal diameter at midpoint
• L = minimum socket length (from IS 10124 Part 1)
• t = minimum wall thickness of socket (excluding sealing ring groove)

Summary Diagram of Marking & Color Coding

graph LR
A[Socket Marking] --> B[Manufacturer ID]
A --> C[Size & Pressure Class]
A --> D[Color Code]
D --> E{Class}
E -->|1 (0.25 MPa)| F[Red]
E -->|2 (0.4 MPa)| G[Blue]
E -->|3 (0.6 MPa)| H[Green]
E -->|4 (0.8 MPa)| I[Brown]
E -->|5 (1.0 MPa)| J[Yellow]
E -->|6 (1.25 MPa)| K[Black]
E -->|Plumbing| L[Pink]

For detailed thickness tables, refer to IS 10124 (Part 2) Tables 1 & 2 for nominal

IS 10124 Part 2: Sampling and Testing - Key Points

• Reference to Part 1: Sampling, testing methods, and criteria for conformity strictly follow IS 10124 (Part 1).

• Rounding Off Results:
  As per IS 2:1960, test results must be rounded to the same number of significant figures as specified in the standard.

• Sampling Procedure:

  • Samples should be taken randomly from the batch or lot.
  • Number and size of samples depend on batch size (refer IS 10124 Part 1 for exact tables).

• Testing Parameters:
  Typical tests include:

  • Chemical composition
  • Mechanical properties (tensile strength, yield strength, elongation)
  • Dimensional checks
  • Surface quality

• Acceptance Criteria:
  Conformity is based on whether the test results fall within specified limits in Part 1.

Example: Rounding Off Rule (IS 2:1960)

For detailed sampling sizes and test methods, always refer to IS 10124 Part 1 tables and clauses.

flowchart LR
    A[Batch/Lot] --> B[Random Sampling]
    B --> C[Sample Preparation]
    C --> D[Testing]
    D --> E{Test Results}
    E -->|Within Limits| F[Accept Batch]
    E -->|Outside Limits| G[Reject/Retest Batch]

Certification and Standard Mark (IS 10124 Part 2: 2009)

Clause 4.2 - BIS Certification Marking:

• Each socket may be marked with the BIS Standard Mark.
• Use of the Standard Mark is governed by the Bureau of Indian Standards Act, 1986 and related rules.
• License for use of the Standard Mark is granted by BIS to manufacturers under specific conditions.

Key Specifications for Socket Dimensions

• D = Mean socket internal diameter (mid-point of socket length) per IS 10124 Part 1.
• L = Minimum socket length as per IS 10124 Part 1.
• t = Minimum wall thickness of socket = 90% of the minimum wall thickness of the corresponding pipe size and pressure class, rounded to next 0.1 mm.

Minimum Wall Thickness (t) for Sockets (in mm)

Refer to Tables 1 & 2 in IS 10124 Part 2 for full details including elastomeric sealing ring joint sockets.

Notes:

• Wall thickness excludes sealing ring groove.
• Dimensions and marking ensure compliance with BIS quality and safety standards.
• Rounding off values per IS 2:1960 rules.

Summary Diagram of Socket

Compliance and Rounding Rules (IS 10124 Part 2)

• Rounding Off Values:
  Follow IS 2:1960 for rounding numerical results from tests or calculations.

  • The number of significant digits in the rounded value must match the specified value's significant digits in the standard.
  • For example, if a dimension is specified as 12.5 mm (3 significant digits), the result should be rounded to 3 significant digits.

• General Compliance:

  • Final observed/calculated values must be compared after rounding.
  • Ensures uniformity and avoids false non-compliance due to insignificant decimal differences.

• Specific Requirements Mentioned:

  • Caps and 11 1/4 bends have their own dimensional and tolerance specifications (refer to respective clauses in IS 10124 Part 2).

Example: Rounding Rule per IS 2:1960

flowchart TD
    A[Measured/Calculated Value] --> B[Rounding per IS 2:1960]
    B --> C[Match significant digits of Specified Value]
    C --> D[Compliance Decision]

Note: Always refer to IS 10124 Part 2 for specific dimensional tolerances on bends and caps.