injection moulded PVC socket fittings with solvent cement joints for water supplies, Part 2: Specific requirements for 45 degrees elbows

IS 7834 Part 2 - Scope & Key Specifications for 45° PVC Elbows

• Scope:
  Specifies requirements for manufacture, dimensions, tolerances, and marking of injection moulded PVC 45° elbows for water supply.

• Laying Length (Z):
  Defined per nominal pipe size with tolerances as below (in mm):

• Marking:
  As per BIS standard mark requirements (Clause 3.1).

Summary Diagram of 45° Elbow Laying Length (Z)

graph LR
A[Pipe Size (mm)] --> B[Laying Length Z (mm)]
B --> C{Tolerance ±}

This table guides precise fitting lengths ensuring proper jointing and flow in PVC piping systems per IS 7834 Part 2.

IS 7834 (Part 2) - 1987: Key Requirements for 45° Elbow Laying Length

1. Laying Length (Z) and Tolerances (Clause 2.2.2 & Table 1)

2. Additional Specifications

• Standard Mark (Clause 3.1): Products must comply with BIS standard marking requirements.
• Manufacture: Must follow the dimensional and tolerance guidelines above.

This table helps ensure proper fitting and installation of 45° elbows in plastic piping systems per IS 7834 Part 2 standards.

IS 7834 (Part 2) - 1987: General Specifications Summary

1. Laying Length (Clause 2.2.2)

The laying length Z for 45° elbows with tolerances is specified in Table 1 below:

2. Manufacture & Standard Mark (Clause 3.1)

• Products must bear the BIS Standard Mark confirming compliance.
• Details available from Bureau of Indian Standards.

This table is essential for ensuring proper fitting and installation of plastic pipe elbows per IS 7834 Part 2.

flowchart LR
    A[Pipe Size (mm)] --> B[Laying Length

IS 7834 Part 2 (1987) - Manufacture Key Points

1. Manufacture (Clause 2.2)

• Focuses on dimensions and tolerances of plastic pipe fittings.
• Ensures consistency for installation and standard marking.

2. Laying Length for 45° Elbows (Clause 2.2.2 & Table 1)

3. Standard Mark (Clause 3.1)

• Details managed by BIS; ensures product compliance.

Summary:
The key manufacturing specification is the laying length (Z) for 45° elbows with defined tolerances per pipe size, critical for proper fitting and installation.

flowchart LR
A[Manufacture Clause 2.2] --> B[Laying

IS 7834 Part 2 - Typical 45° Elbow Specifications

1. Typical Illustration

• Refer to Fig. 1 in the code for the 45° elbow shape and dimensions.
• The elbow is injection moulded PVC, used for water supply.

2. Key Dimensions (Laying Length, Z)

3. Socket Dimensions

• Inside diameter and socket length must comply with IS 7834 Part 1 (1987).

4. Marking on Elbow

• Manufacturer's name or ID mark.
• Size of fitting.
• Class (working pressure rating).

Summary Diagram of 45° Elbow Dimensions

flowchart LR
    A[Pipe Inlet] --> B[Socket Length]
    B --> C[Elbow Bend 45°]

IS 7834 Part 2 (1987) — Laying Length for 45° Elbows

Key Specification:

• Laying Length (Z) for 45° elbows is specified in Table 1 (Clause 2.2.2).
• Tolerances are also given alongside nominal values.

Table: Laying Length ( Z ) for 45° Elbows (in mm)

Notes:

• The laying length ( Z ) is the distance from the pipe end to the tangent point on the elbow.
• Tolerances ensure manufacturing precision.
• Refer to Fig. 1 (Clause 2.2.1) for elbow illustration (not provided here).

Summary:

• Use the above table for selecting laying length ( Z ) for 45° elbows.
• Ensure tolerances are

IS 7834 Part 2: Socket Dimensions Key Points

• Socket dimensions (inside diameter & length) must comply with IS 7834 Part 1 (1987).
• For 45° elbows, the laying length (Z) is specified per size (mm) as follows:

• Marking on fittings includes:
  • Manufacturer's name/ID
  • Size and pressure class

Note: For exact socket inside diameter and length, refer to IS 7834 Part 1 tables.

flowchart LR
A[IS 7834 Part 1] --> B[Socket Dimensions: Inside Diameter & Length]
B --> C[IS 7834 Part 2]
C --> D[45° Elbow Laying Length (Z) per size]
D --> E[Marking: Manufacturer, Size, Pressure Class]

This ensures compatibility and pressure rating

IS 7834 Part 2 (1987) - Marking & Key Specifications for 45° Elbow Fittings

Marking Requirements (Clause 3)

Each elbow fitting shall be clearly marked with:

• Manufacturer's name or identification mark
• Size of the fitting
• Appropriate class (working pressure rating)

Key Dimensions & Tolerances (Clause 2.2.2 & Table 1)

Additional Notes:

• Socket inside diameter and length conform to IS 7834 Part 1 (1987).
• Laying length (Z) tolerance ensures proper fit and alignment during installation.

flowchart LR
    A[Elbow Fitting] --> B[Marking]
    B --> C[Manufacturer's Name]
    B --> D[Size of Fitting]
    B --> E[Class / Working Pressure]
    A