Fabricated PVC-U fittings for Potable Water Supplies, Part 11: Specific Requirements for 30-degree Bends

IS 10124 Part 11: Scope & Key Specifications

Scope Summary:

• Covers 30° bends for ductile iron pipes.
• Dimensions and wall thicknesses per Table 1 and Fig. 1.
• Elastomeric sealing ring joint bends per Table 2 and Fig. 2.
• Rounding off values per IS 2:1960.
• BIS certification and marking governed by BIS Act 1986 (Clause 4.2.1).

Key Dimensions for 30° Bends (Excerpt from Table 1):

• Y: Offset length
• L: Length for plain ends
• R: Radius of bend
• Wall thickness varies with pressure class (0.4 to 1.25 MPa).

Rounding Rule:

• Final test or calculation values rounded as per IS 2:1960.
• Retain significant digits equal to specified values.

BIS Marking:

• Use governed by BIS Act 1986.
• License conditions available from BIS.

flowchart LR
    A[30° Bends] --> B[Dimensions per Table 1 & Fig.1]
    A --> C[Elastomeric Sealing Ring Joint per Table 2 & Fig.2]
    B --> D[Nominal Size, Y, L, R]
   

IS 10124 Part 11 (2009) - Key Formulas, Tables & Specifications

References (Table 2)

Key Dimensions for 30° Bends (Clause 3.2.2)

• Radius of bend (R) = 3 × Nominal Outside Diameter (D)
• Y (Min) = ( 30^\circ \times 2 \pi R / 360^\circ ) (arc length for 30° bend)

Table 1: 30° Bend Dimensions (Plain Ends)

*(Refer to full table for all

IS 10124 Part 11: Key Dimensions for 30° Bends

1. Definitions (Fig. 1 & Fig. 2)

• Y (Min): Offset length of the bend
• L (Plain Ends): Length for plain end bends
• R (Min): Minimum bend radius = 3 × Nominal Outside Diameter (D)
• t: Minimum wall thickness depending on working pressure class

2. Formulas

• Y (Min) calculation:
  [ Y = 2 \times R \times \sin(30^\circ) = R ]
• R (Min):
  [ R = 3 \times D ]

3. Tables Summary

(Refer Table 1 for full sizes)

4. Elastomeric Sealing Ring Joint Bends (Table 2)

• Similar dimensions with slightly larger L values.
• Wall thicknesses adjusted for sealing ring joint pressures.

Notes:

• Minimum wall thickness is 90% of the corresponding pipe thickness rounded up to 0.1 mm.
• Dimensions ensure

IS 10124 Part 11: Marking of 30° Bends

Key Marking Requirements (Clause 4.1)

Each 30° bend must be clearly and indelibly marked with:

• Manufacturer's name or ID
• Bend size and class (working pressure per IS 4985)
• Degree of bend (30°)
• Colour code based on class:

BIS Certification Mark (Clause 4.2)

• Optional Standard Mark usage governed by BIS Act 1986.
• Manufacturer must obtain license for Standard Mark use.

Dimensions & Wall Thickness (Clause 3.2.2, Table 1)

IS 10124 Part 11 - Manufacture Key Specifications

1. Manufacture Clause (3.2)

• Manufacture must comply with dimensional and quality requirements.
• Dimensions for 30° bends are specified in Table 1 and Fig. 1.
• Elastomeric sealing ring joint bends have separate dimensions (Table 2, Fig. 2).

2. Dimensions of 30° Bends (Clause 3.2.2, Table 1)

• Dimensions Y, L, R are in millimeters.
• Wall thickness varies with working pressure class (0.4 to 1.25 MPa).

3. Certification Marking (Clause 4.2.1)

• Use of Standard Mark governed by BIS Act, 1986.

IS 10124 Part 11: Material Requirements Summary

• Material & Sizes: As per IS 10124 Part 1, all materials must meet specified chemical and mechanical properties, including tensile strength, hardness, and impact resistance. Sampling and testing follow Part 1 guidelines.

• Dimensions for 30° Bends:

  • For standard bends, refer to Table 1 and Fig. 1.
  • For elastomeric sealing ring joint bends, refer to Table 2 and Fig. 2.

Key Dimension Tables (Extract)

Material Testing & Sampling

• Tensile test, hardness test, and impact test per IS 10124 Part 1.
• Sampling based on batch size and IS guidelines.

flowchart LR
    A[Material Procurement] --> B[Testing & Sampling (IS 10124 Part 1)]
    B --> C[Dimension Verification]
    C --> D{Bend Type}
    D -->|Standard 30°| E[Refer Table 1 & Fig. 1]
    D -->|Elastomeric Seal| F[Refer Table 2 & Fig. 2]

Note: Always cross-check dimensions with the figures for precise fabrication.

IS 10124 (Part 11): Pressure Classes & Wall Thickness for PVC-U Bends

Key Specifications:

• Pressure Classes (Working Pressure in MPa): 0.4 (Class 2), 0.6 (Class 3), 0.8 (Class 4), 1.0 (Class 5), 1.25 (Class 6)
• Minimum Wall Thickness (t): Varies with nominal size and pressure class (see tables below).
• Bend Radius (R): Minimum radius = 3 × nominal outside diameter (D).
• Dimension Y (Min): Calculated by ( Y = \frac{30^\circ \times 2 \pi R}{360^\circ} ).
• Minimum Wall Thickness: Calculated as 90% of the corresponding pipe thickness, rounded to next 0.1 mm.

Table 1: 30° Bend Dimensions (Plain Ends)

Table

IS 10124 Part 11: Joint Types and End Connections - Key Dimensions & Specifications

1. 30° Bend Dimensions (Plain Ends) - Table 1

• R (Radius of Bend) = 3 × Nominal Outside Diameter (D)
• Y Min = 30° × 2πR / 360°

2. 30° Bend for Elastomeric Sealing Ring Joint - Table 2

BIS Certification Marking (IS 10124 Part 11: 2009)

• Clause 4.2: Each 30° bend may be marked with the BIS Standard Mark, governed by the Bureau of Indian Standards Act, 1986.
• Licence: Use of the Standard Mark requires a license from BIS.

Key Dimensions & Specifications for 30° Bends

Table 1: 30° Bend Dimensions (Selected values)

Table 2: 30° Bend for Elastomeric Sealing Ring Joint (Selected values)

IS 10124 Part 11: Conformity and Testing - Key Points

1. General Requirements (Clause 3.1)

• Material, sizes, tests, sampling, and conformity criteria align with IS 10124 Part 1.
• Final test values must be rounded off per IS 2:1960 rules, maintaining the same significant figures as the specified values.

2. Dimensional Compliance (Clause 3.2.2)

• Dimensions for 30° bends must follow Table 1 and Fig. 1.
• For elastomeric sealing ring joints, dimensions follow Table 2 and Fig. 2.

3. Table 1: Dimensions of 30° Bends (mm)

(Refer to the full table in the standard for all sizes.)

4. BIS Certification Marking (Clause 4.2.1)

• Use of the Standard Mark is regulated by the Bureau

IS 10124 (Part 11): 2009 — Key Annexure Tables & Specifications

1. Dimensions of 30° Bends (Table 1 & Fig. 1)

• R Min = 3 × Nominal Outside Diameter (D)
• Y Min = Calculated from 30° × 2πR / 360°

2. Dimensions of 30° Bends for Elastomeric Sealing Ring Joint (Table 2 & Fig. 2)