Fabricated PVC-U Fittings for Potable Water Supplies - Specification, Part 7: Specific Requirements for Threaded Adaptors

IS 10124 Part 7: Scope – Key Specifications & Tables

Scope Summary:

• Specifies dimensions, thread details, and fitting allowances for threaded adaptors used in pipes.
• Applies to adaptors with nominal sizes from 63 mm to 110 mm (as per Table 1).
• Ensures compatibility and interchangeability of threaded pipe components.

Key Table Extract: Dimensions of Threaded Adaptors (All dimensions in mm)

Important Notes:

• Thread pitch: Constant at 2.309 mm for all sizes.
• Thread designations: Correspond to pipe nominal sizes (e.g., 2", 2½", 3",

IS 10124 Part 7 — Key References & Threaded Adaptor Dimensions

1. References (Table 2)

• IS 554:1999 — Pipe threads for pressure-tight joints: Dimensions, tolerances, designation.
• IS 4985:2000 — Unplasticized PVC pipes for potable water.
• IS 10124 (Part 1):2009 — Fabricated PVC-U fittings for potable water supplies: General requirements.

2. Threaded Adaptor Dimensions (Table 1, Clause 3.3.1 & 3.3.2)

IS 10124 Part 7 (2009) - Manufacture of Threaded Adaptors

Key Specifications & Dimensions (Clause 3.3.1 / Table 1)

• Thread Classes: Class 3 (0.6 MPa) and Class 5 (1.0 MPa) indicate pressure ratings.
• Thread Pitch: Uniform at 2.309 mm for all sizes.
• Thickness t: Varies with pressure class; thicker for higher pressure.
• Length of Useful Thread (B): Important for gauge and fitting.

Manufacturing Notes:

• Dimensions are in mill

IS 10124 Part 7 - Dimensions of Threaded Adaptors (Clause 3.3.2 & Table 1)

The dimensions of threaded adaptors must comply with Table 1 and Fig. 1 of the standard. Key parameters include:

Important Notes:

• Outside diameters conform to IS 4985.
• Thickness t ensures minimum root thickness after machining/threading as per IS 4985.
• Threads conform to taper external threads specified in IS 554.
• Pipe dimensions are for manufacturer guidance.

Sample Data Extract (Nominal Size 63 mm):

Summary Diagram of Threaded Adaptor Dimensions

flowchart LR
    A[Plain Portion] -->|Length| B[Threaded Portion]
    B -->|Length of Useful Thread (B)| C[Thread]
    A -->|Thickness (t)| D[

Marking Requirements per IS 10124 Part 7 (Clause 4.1):

Each threaded adaptor must be clearly and indelibly marked with:

• Manufacturer's name or identification mark
• Size of the threaded adaptor
• Class (working pressure) of IS 4985 corresponding to the fitting's pressure rating
• Colour code for class identification:

Key Dimensions (Excerpt from Table 1)

Summary Diagram of Marking Elements:

graph LR
A[Threaded Adaptor] --> B[Manufacturer's Mark]
A --> C[Size & Class]
A --> D[Colour Code]
D --> E[Green (Class 3)]
D --> F[Brown (Class 4)]
D --> G

IS 10124 Part 7: Materials - Key Specifications & Tables

1. Material Requirements

• Conform to IS 10124 (Part 1) for general material, sizes, tests, sampling, and conformity criteria.

2. Threaded Adaptor Dimensions (Clause 3.3.1, Table 1)

• Dimensions in mm for nominal sizes 63, 75, 90, 110.
• Includes:
  • Outside diameter (D)
  • Length and thickness of plain portion (t)
  • Thread pitch and diameters (major d, pitch d2, minor d1)
  • Length of useful thread (B)
  • Fitting allowance (C)
  • Reference figures for manufacturing guidance

3. Thread Standards

• Threads conform to IS 554 (pipe threads for pressure-tight joints).
• Material thickness after machining/threading must meet IS 4985 (PVC pipes for potable water).

4. Material Thickness Criteria

• Thickness (t) chosen so minimum root thickness after threading ≥ IS 4985 minimum.

Sample Table Extract (Nominal Size 63 mm)

References for Materials & Threads

• IS 4985: PVC pipes for potable water
• IS 554: Pipe threads for pressure-tight joints
• IS 10124 (Part 1): General requirements for PVC fittings

flowchart TD
    A[Material Selection] --> B[IS 10124 (Part 1)

IS 10124 Part 7: Pressure Classes & Colour Coding for Threaded Adaptors

Key Specifications (Clause 4.1):

• Each threaded adaptor must be marked indelibly with:
  • Manufacturer's name/ID
  • Size and corresponding pressure class per IS 4985
  • Colour coding based on pressure class

Pressure Classes & Colour Coding Table:

Additional Notes:

• Thread dimensions comply with IS 554 (pipe threads for pressure-tight joints).
• Thickness at thread root must meet minimum values per IS 4985 for the specified class.
• Colour coding helps quick identification of pressure rating on site.

flowchart LR
    A[Threaded Adaptor] --> B{Markings}
    B --> C[Manufacturer's Name/ID]
    B --> D[Size & Pressure Class (IS 4985)]
    B --> E[Colour Coding]
    E --> F[Class 3 - Green]
    E --> G[Class 4 - Brown]
    E --> H[Class 5 - Yellow]
    E --> I[Class 6 - Black]

This system ensures safety and compatibility in potable water supply installations.

IS 10124 Part 7: Threaded Adaptors – Key Specifications & Dimensions

1. Types of Threaded Adaptors

• Plain Ended or Socketed (socket dimensions per IS 10124 Part 1).
• Sizes ≥125 mm generally not recommended for threaded adaptors.
• Pressure class considerations:
  • For 0.25 & 0.4 MPa, use adaptors made from 0.6 MPa class pipes.

2. Key Dimensions (from Table 1, all in mm)

3. Thread Details

• Thread Designation: Class 3 (0.6 MPa), Class 5 (1.0 MPa)
• Pitch:

IS 10124 Part 7: Testing and Quality Assurance - Key Points

• Rounding off results:
  Follow IS 2:1960 for rounding numerical test results.

  • Retain the same number of significant digits as the specified value.
  • Ensures consistency and comparability of test data.

• Material & Sampling:
  Refer to IS 10124 Part 1 for:

  • Material specifications
  • Size tolerances
  • Sampling methods
  • Criteria for conformity

• Testing:

  • Conduct tests as per prescribed methods in IS 10124 Part 1.
  • Use final rounded values for compliance checks.

Typical Quality Assurance Workflow (Simplified)

flowchart TD
    A[Material Procurement] --> B[Sampling as per IS 10124 Part 1]
    B --> C[Testing (Mechanical, Chemical)]
    C --> D[Result Calculation & Rounding (IS 2:1960)]
    D --> E{Conforms to Spec?}
    E -- Yes --> F[Accept Material]
    E -- No --> G[Reject / Reprocess]

Summary: IS 10124 Part 7 primarily references Part 1 and IS 2:1960 for testing and QA. No separate formulas or tables are provided here; use Part 1 for detailed procedures and IS 2 for rounding rules.

IS 10124 Part 7 (2009) - BIS Certification Marking Summary

Clause 4.2 - BIS Certification Marking:

• Each threaded adaptor may bear the BIS Standard Mark.
• Use of the Standard Mark is governed by the Bureau of Indian Standards Act, 1986.
• Licence conditions for use are available from BIS.

Key Specifications from Table 1 (Clause 3.3.1)

• Thread Dimensions conform to IS 554 (Taper external thread).
• Thickness t ensures minimum root thickness per IS 4985.
• Dimensions guide manufacturers for pipe and adaptor compatibility.

Important Notes:

• The Standard Mark usage requires BIS approval/licensing.
• Dimensions and toler

IS 10124 Part 7: Compatibility with Pipes — Key Specifications and Tables

This part of IS 10124 focuses on threaded adaptors for PVC pipes, ensuring compatibility with pipe dimensions and thread standards.

Key References:

• IS 4985:2000 — Dimensions for unplasticized PVC pipes.
• IS 554:1999 — Pipe threads dimensions and tolerances.
• IS 10124 (Part 1):2009 — Specifications for fabricated PVC-U fittings.

Important Parameters for Threaded Adaptors (Excerpt from Table 1):

Notes:

• Thickness

IS 10124 Part 7: Notes and Recommendations - Key Points

1. Rounding Off Values

   • Follow IS 2:1960 for rounding off numerical results.
   • Retain the same number of significant digits as specified in the standard.

2. Threaded Adaptors Dimensions (Clause 3.3.1, Table 1)

   • Dimensions in mm for nominal sizes 63, 75, 90, 110.
   • Key parameters include:
     • Outside Diameter (D)
     • Length of Plain Portion
     • Thickness at Plain Portion (t)
     • Thread Pitch and Diameter (major, pitch, minor)
     • Length of Useful Thread (B)
     • Fitting Allowance (C)
   • Example for Nominal Size 63:

     Parameter	Value (mm)
     Outside Dia D	63.0 - 63.3
     Length Plain Portion	68.0
     Thickness t (Class 3)	5.5
     Thread Pitch	2.309
     Length Useful Thread B	23.4
     Fitting Allowance C	7.5

3. References to Other IS Codes

   • IS 554:1999 (Pipe threads dimensions & tolerances)
   • IS 4985:2000 (Unplasticized PVC pipes)
   • IS 10124 (Part 1):2009 (PVC-U fittings general requirements)

Summary Diagram of Threaded Adaptor Key Dimensions

graph LR
A[Nominal Size] --> B[Outside Diameter (D)]
B --> C[Length of Plain Portion]
C --> D[Thickness (t)]
D --> E[Thread Dimensions]
E --> F[Length of Useful Thread (B)]
F --> G[Fitting Allowance (C)]

Use this data for design, fabrication, and inspection of PVC threaded adaptors per IS 10124 Part 7.