Unplasticized PVC Pipes for Use in Suction and Delivery Lines of Agricultural Pump Sets

IS 10124 Part 13: Scope & Key Specifications Summary

Scope:

• Covers dimensions and specifications for 11¼° bends used in concrete pipes.
• Applies to bends with plain ends and elastomeric sealing ring joints.
• Ensures compliance with dimensional and pressure requirements.

Key Dimensions (Clause 3.2.2 & Table 1, Fig. 1):

• Y: Offset dimension.
• L: Length dimension (only for plain ends).
• R Min: Minimum bend radius.
• t: Minimum wall thickness depending on working pressure class.

Rounding Off:

• Final test or calculation values must be rounded as per IS 2:1960 rules, retaining the same significant figures as specified.

Certification:

• Use of Standard Mark governed by BIS Act 1986 (Clause 4.2.1).

Diagram: 11¼° Bend Dimensions (Simplified)

flowchart LR
    A[Pipe End] --> B[Y Offset]
    B --> C[L Length]
    C --> D[R Min Radius]
    style A fill:#f9f,stroke:#333,stroke-width:

IS 10124 (Part 13) : 2009 — Key References, Formulas & Tables

References (Table 2)

• IS 4985:2000 — Unplasticized PVC pipes for potable water supplies.
• IS 10124 (Part 1):2009 — Specification for fabricated PVC-U fittings.

Important Specifications

• Minimum wall thickness (t) is based on 90% of the pipe's minimum wall thickness rounded to the next 0.1 mm.
• Bend radius (R_min) = 3 × Nominal Outside Diameter (D).
• Dimension Y_min = 11¼ × 2πR (used for bend length calculations).

Tables Summary

Refer to the standard for full tables.

Notes:

• Dimensions are in millimeters.
• Tables cover both plain ends and elastomeric sealing ring joint bends.
• BIS Certification Mark usage governed by BIS Act

IS 10124 (Part 13): Dimensions for 11¼° Bends

Key Points from Clause 3.2.2:

• Dimensions for 11¼° bends are given in Table 1 (plain ends) and Table 2 (elastomeric sealing ring joint).
• Radius ( R_{min} = 3 \times ) nominal outside diameter (D).
• ( Y_{min} ) is calculated as:
  [ Y_{min} = 11.25^\circ \times 2 \pi R ]
• Minimum wall thickness (t) depends on working pressure class (0.4 to 1.25 MPa).

Table 1 (Plain Ends) - Sample Dimensions (mm)

Table 2 (Elastomeric Sealing Ring Joint) - Sample Dimensions (mm)

IS 10124 Part 13: Manufacture - Key Specifications & Tables

Manufacture Clause (3.2):
Defines dimensional and thickness requirements for bends in pipes, ensuring compliance with working pressure classes.

Key Formulas:

• Y (Min) = 11¼ × 2π × R
  (Y is a dimension related to bend length)

• R (Min) = 3 × Nominal Outside Diameter (D)
  (Minimum bend radius)

• Minimum Wall Thickness (t):
  Calculated as 90% of the minimum wall thickness of the corresponding pipe size and pressure class, rounded up to the next 0.1 mm.

Table 1: Dimensions of 11¼° Bends (Plain Ends)

(Refer IS 10124 Part 13 Table 1 for full details)

Table 2: Dimensions of 11¼° Bend for Elastomeric Sealing Ring Joint

| Nominal Size (mm) | Y Min (mm) | L (Plain Ends) (mm) | R Min (mm) | Min Wall Thickness

IS 10124 Part 13: Marking of 11¼° Bends

Key Marking Requirements (Clause 4.1)

Each 11¼° bend shall be marked with:

• Manufacturer's name or identification mark
• Size of the bend and class (working pressure) as per IS 4985
• Degree of bend (11¼°)
• Colour coding for class of fittings:

BIS Certification Mark (Clause 4.2)

• Optional Standard Mark per BIS Act, 1986.
• Licence conditions available from BIS.

Dimensions & Wall Thickness (Table 1 & 2 Highlights)

• Minimum bend radius (R_min) = 3 × nominal outside diameter (D)
• Y_min = 11¼° × 2πR (arc length calculation)
• Wall thickness varies by class and size; e.g., for nominal size 50 mm (Class 5): t_min = 2.5 mm.

Summary Diagram of Marking Elements

graph LR
A[11¼° Bend] --> B[Manufacturer's ID]
A --> C[Size & Class (IS 4985)]
A --> D[Degree of Bend]
A --> E[Colour Code]
E --> F[Blue (Class 2)]
E --> G[Green (Class 3)]
E --> H[Brown (Class 4)]
E --> I[Yellow (Class 5)]
E --> J[Black (Class 6)]
E --> K[Pink (Plumbing)]

For detailed dimensions and thicknesses

IS 10124 Part 13: General Requirements Summary

• Material & Sizes: Must conform to IS 10124 Part 1 (2009), which covers PVC-U fittings for potable water.
• Tests & Sampling: Follow IS 10124 Part 1 procedures for mechanical, dimensional, and physical tests ensuring conformity.
• Criteria for Conformity: Compliance with Part 1 ensures materials meet strength, durability, and safety standards.
• Referenced Standards:
  • IS 4985:2000 for unplasticized PVC pipes used in potable water.
  • IS 10124 (Part 1) for general fitting specifications.

Key Points from IS 10124 Part 1 (General Requirements):

flowchart LR
    A[Raw Material PVC-U] --> B[Fabrication per IS 10124 Part 1]
    B --> C[Dimensional & Mechanical Tests]
    C --> D[Conformity Check]
    D --> E{Pass?}
    E -->|Yes| F[Approved for Use]
    E -->|No| G[Rejected]

For detailed formulas or dimensional tables, refer directly to IS 10124 Part 1.

IS 10124 Part 13: Specific Requirements for 11¼° Bends

Key Points from Clause 3.2.2 (Dimensions):

• 11¼° bends dimensions must follow Table 1 with reference to Fig. 1.
• For elastomeric sealing ring joints, dimensions must follow Table 2 with reference to Fig. 2.

Typical Content (Based on IS 10124 Standards):

Note: Tables 1 & 2 provide exact lengths and dimensions for different pipe sizes and joint types.

Elastomeric Sealing Ring Joint:

• Requires precise groove and lip dimensions.
• Ensures leak-proof performance at 11¼° bend.

Diagram Reference (Fig. 1 & Fig. 2):

graph LR
A[Pipe Straight] --> B[11¼° Bend]
B --> C[Dimensions: Radius (R), Length (L), OD]
B --> D[Elastomeric Seal Groove]

Summary:

• Use Table 1 + Fig. 1 for standard 11¼° bends.
• Use Table 2 + Fig. 2 for elastomeric sealing ring joints.
• Bend radius typically ~1.5 times pipe diameter.
• Ensure dimensional compliance for leak-proof joints.

For exact values, refer to IS 10124 Part 13 Tables 1 & 2.

IS 10124 Part 13: Elastomeric Sealing Ring Joints for 11¼° Bends

Key Specifications:

• Bend angle: 11¼° (Clause 3.2.1, Fig. 2)
• Minimum bend radius (R_min): 3 × Nominal Outside Diameter (D) (Clause 1.25)
• Y_min: Calculated as 11¼ × 2π × R (Clause 1.25)
• Minimum wall thickness (t): 90% of pipe thickness rounded to next 0.1 mm (Clause 1.25)

Table 2: Dimensions for 11¼° Bend with Elastomeric Sealing Ring Joint

(Refer full table for all sizes and pressures)

Important Notes:

• Dimensions and thicknesses ensure proper sealing and mechanical strength.
• Elastomeric ring joints accommodate bending without leakage.
• Use

IS 10124 Part 13 (2009) — Wall Thickness & Pressure Classes Key Data

1. Wall Thickness (t) for Bends (in mm)

• Given for working pressures: 0.4, 0.6, 0.8, 1.0, 1.25 MPa (Pressure Classes 2 to 6).
• Thickness increases with nominal size and pressure class.
• Minimum wall thickness is 90% of pipe thickness, rounded to next 0.1 mm.

2. Radius of Bend (R_min)

• Minimum radius = 3 × nominal outside diameter (D).

3. Dimension Y (min)

• ( Y = \frac{11}{4} \times 2\pi R ) (used for bend geometry).

Table Extract (Nominal Size vs Wall Thickness for Class 5 - 1.0 MPa)

Notes:

• Bends for 0.25 MPa pressure class should be made from 0.4 MPa class pipes.
• Bends may have plain ends or socketed ends per IS 10124 Part 1.
• Tables 1 & 2 provide dimensions for plain ends and elastomeric sealing ring joints respectively.

flowchart LR
    A[Nominal Size (D)] --> B[R_min = 3 × D]
    B --> C[Calculate Y = 11/4 × 2πR]
    C --> D[Select Pressure Class (0.4 to 1.25 MPa)]
    D --> E[Determine Min Wall Thickness (t) from Table]
    E --> F[Manufacture Bend with Plain or Socket Ends]

For full tables and detailed dimensions, refer to IS 10124 Part 13 Tables

IS 10124 Part 13: Testing and Conformity Criteria - Key Points

• Reference to IS 10124 (Part 1):
  All materials, sizes, tests, sampling, and conformity criteria must comply with IS 10124 Part 1. This includes:

  • Sampling methods
  • Test procedures
  • Acceptance criteria for material quality

• Rounding Off Results (IS 2:1960):
  Test results must be rounded off following IS 2:1960 rules:

  • Final values (test results) rounded to the same number of significant digits as the specified values.
  • Ensures consistency and avoids over-precision.

• Testing & Conformity Flow:

flowchart TD
    A[Sample Collection as per IS 10124 Part 1] --> B[Conduct Tests (Material, Size, etc.)]
    B --> C[Calculate/Observe Results]
    C --> D[Round off results as per IS 2:1960]
    D --> E{Conformity Check}
    E -->|Pass| F[Accept Material]
    E -->|Fail| G[Reject Material / Retest]

• Caps Specifics:
  Additional requirements for caps are specified but not detailed here; refer to the relevant clauses in IS 10124 Part 13.

Summary:
Testing and conformity rely heavily on Part 1 of IS 10124, with strict rounding rules per IS 2:1960 ensuring uniformity in reporting test results. Compliance is judged on these final rounded values.

BIS Certification Marking - IS 10124 Part 13 (2009)

Key Points:

• The Standard Mark can be applied on each 111¼° bend as per Clause 4.2.
• Use of the Standard Mark is governed by the BIS Act, 1986 and related rules (Clause 4.2.1).
• Minimum wall thickness (t) is calculated as 90% of the minimum wall thickness for the corresponding pipe size and pressure class, rounded up to the next 0.1 mm (Clause 1.25).

Important Formulas & Definitions

• Minimum Radius of Bend (R_min):
  [ R_{min} = 3 \times D ]
  where (D) = nominal outside diameter.

• Y_min (distance parameter):
  [ Y_{min} = 11\frac{1}{4} \times 2\pi R ]

• Minimum wall thickness (t): Based on working pressure class (MPa), from tables below.

Table Extract: Minimum Wall Thickness (t) for 111¼° Bend (Example for Nominal Size 63 mm)

Summary Table for Nominal Size 63 mm (Clause 1.25, Table 2)

BIS Marking Licensing

• Manufacturers must obtain a license from BIS to use the Standard Mark.
• Details available from BIS Headquarters:
  Manak Bhavan, 9 Bahadur Shah Zafar Marg, New Delhi - 110002
  Website: www.bis.org.in

IS 10124 (Part 13) - Key Formulas and Tables for Annexures

Key Formulas:

• Minimum Wall Thickness (t):
  Calculated as 90% of the minimum wall thickness of the corresponding pipe size and pressure class, rounded to the next higher 0.1 mm.

• Y, Min (Offset dimension for 11¼° bends):
  [ Y_{\min} = \frac{11.25}{4} \times 2\pi R ]

• Minimum Bend Radius (R, Min):
  [ R_{\min} = 3 \times D ] where D = nominal outside diameter.

Important Tables (Dimensions in mm):

Refer to Table 2 for full size range.

Notes:

• Tables provide dimensions for 11¼° bends with elastomeric sealing ring joints.
• Wall thickness varies with working pressure class (Class 2 to Class 6).
• Dimensions Y, L, R are critical for fabrication and installation.
• For plain ends, L is the minimum length of the bend end.