IS 7834 Part 51987AI Search Enabled✦ AI Generated

Injection Moulded PVC Socket Fittings With Solvent Cement Joints for Water Supplies, Part 5: Specific Requirements for 45-degree Tees

IS 7834 Part 5 (1987) specifies the requirements for injection moulded PVC socket fittings with solvent cement joints specifically for 45-degree tees used in water supply systems. It covers manufacturing standards, dimensions, tolerances, and marking to ensure compatibility and reliability in plumbing applications. This standard is essential for manufacturers, engineers, and quality inspectors involved in PVC piping systems for potable water.

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21Clauses Indexed
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1987Edition
Plastic Piping SystemCategory
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What This Standard Covers

IS 7834 Part 5 (1987) specifies the requirements for injection moulded PVC socket fittings with solvent cement joints specifically for 45-degree tees used in water supply systems. It covers manufacturing standards, dimensions, tolerances, and marking to ensure compatibility and reliability in plumbing applications. This standard is essential for manufacturers, engineers, and quality inspectors involved in PVC piping systems for potable water.

Who Uses This Standard

  • Civil Engineers
  • Plumbing Engineers
  • Manufacturers of PVC Pipe Fittings
  • Quality Control Inspectors
  • Water Supply System Designers
  • Construction Contractors
  • Standards Compliance Officers

Key Topics Covered

Material and manufacturing requirements
Dimensional specifications for 45° tees
Tolerances for laying length and socket dimensions
Marking and identification of fittings
Compatibility with solvent cement joints
Pressure rating classifications
Inspection and sampling procedures
Conformance with Part 1 general requirements
Recommended sizes and limitations
Application in potable water supply systems
Quality assurance standards
Reaffirmation and revision history

Table of Contents

1Scope

IS 7834 Part 5: Scope & Key Specifications for 45° Tees

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

  • General Requirements: Refer IS 7834 Part 1 for material, manufacturing, testing, sampling, and inspection protocols.


Key Dimensions (Clause 2.2.2 - 45° Tees Laying Length)

Size (mm)Z (mm)Z1 (mm)
2027 ± 36 +2 / 0 -1
2533 +37 +2
3242 +4 / -38 +2 / -1
4051 +5 / -310 +2 / 0 -1
5063 +6 / -312 +2 / 1
6379 +7 / -314 +2 / -1
7594 +9 / -317 +2 / -1
90112 +11 / -320 +3 / 1
110137 +13 / -424 +8 / -1
125157 +15 / -427 +3 / -1
140175 +17 / -530 +4 / 1
160200 +20 / -635 +4
  • Note: Larger sizes of 45° elbows are not recommended by ISO.

Marking & Other Parts

  • Standard marking details per BIS guidelines (Clause 3.1).
  • Related parts cover other fittings like elbows, sockets, unions, caps.

flowchart LR
    A[IS 7834 Part 5] --> B[Scope: 45° PVC Tees]
    B --> C[Manufacture & Dimensions]
    B --> D[Tolerances
2Requirements

IS 7834 Part 5: Key Requirements for 45° PVC Tees

1. Scope

  • Specifies manufacture, dimensions, tolerances, and marking for injection moulded PVC 45° tees used in water supply systems.

2. Dimensions & Tolerances (Clause 2.2.2)

Size (mm)Laying Length Z (mm)Laying Length Z1 (mm)
2027 ± 36 +2 / 0 -1
2533 +37 +2
3242 +4 / 2 -38 +2 / -1
4051 +5 / -310 +2 / 0 -1
5063 +6 / -312 +2 / 1
6379 +7 / -314 +2 / -1
7594 +9 / -317 +2 / -1
90112 +11 / 320 +3 / 1
110137 -4 / +1324 +8 / -1
125157 +15 / 427 -1 / +3
140175 +17 / 530 +4 / 1
160200 -6 / +2035 +4

Note: Higher sizes of 45° elbows are not recommended by ISO.

3. Marking (Clause 3.1)

  • Marking details conform to BIS standards (refer IS 7834 Part 1).

4. General Requirements (Clause 2.1)

  • Material, manufacturing, testing, sampling, and inspection per IS 7834 Part 1.

Summary Diagram of 45° Tee Dimensions

flowchart LR
    A[PVC 45° Tee] --> B[Laying Length Z]
    A --> C[Laying Length
2.1General

IS 7834 Part 5: General Specifications for 45° Tees

Key Points & Specifications:

  • Material & Manufacture:
    Conform to IS 7834 Part 1 (1987) for general requirements including material quality, manufacturing, testing, sampling, and inspection.

  • Standard Marking:
    Marking details are per Bureau of Indian Standards (BIS) guidelines (Clause 3.1).

  • 45° Tee Dimensions (Laying Lengths):

Size (mm)Z (mm)Z1 (mm)
2027 ± 36 + 2 / 0 - 1
2533 + 37 + 2
3242 + 48 + 2 / -1
4051 + 510 + 2 / 0 - 1
5063 + 6 / -312 + 2 / 1
6379 + 7 / -314 + 2 / -1
7594 + 9 / -317 + 2 / -1
90112 + 11 / -320 + 3 / 1
110137 - 4 / +1324 + 8 / -1
125157 + 15 / 427 - 1 / +3
140175 + 1730 + 4 / 1
160200 - 6 / +2035 + 4
  • Note: Higher sizes of 45° elbows are not recommended by ISO.

Additional References:

  • Other parts of IS 7834 cover elbows, sockets, unions, and caps.
  • For detailed dimensional drawings, refer to Fig. 1 in the code.

graph TD
A[IS 7834 Part 5] --> B[Material & Manufacture per Part 
2.2Manufacture

IS 7834 Part 5: Manufacture of 45° PVC Tees

Key Specifications (Clause 2.2 & Table 2.2.2)

  • Manufacture must conform to IS 7834 Part 1 (General requirements for injection moulded PVC socket fittings).
  • Marking details per Clause 3.1 are as per Bureau of Indian Standards.
  • Laying Lengths for 45° Tees (Z and Z1 dimensions in mm):
Size (mm)Z (mm)Z1 (mm)
2027 ± 36 + 2 / 0 - 1
2533 + 37 + 2
3242 + 48 + 2 / -1
4051 + 510 + 2 / 0-1
5063 + 6 / -312 + 2 / 1
6379 + 7 / -314 + 2 / -1
7594 + 9 / -317 + 2 / -1
90112 + 1120 + 3 / 1
110137 - 4 / +1324 + 8 / -1
125157 + 15 / 427 - 1 / +3
140175 + 1730 + 4 / 1
160200 - 6 / +2035 + 4

Note: Sizes above 160 mm for 45° elbows are not recommended by ISO.

Manufacturing Notes

  • Injection moulded PVC fittings must follow IS 7834 Part 1 for material and testing.
  • Dimensional tolerances are critical for proper solvent cement joint performance.

Summary Diagram of 45° Tee Dimensions

graph LR
A[Pipe] --> B[45° Tee]
B --> C
2.2.1Illustration of 45° Tee

IS 7834 (Part 5) - 1987: 45° Tee Key Specifications

1. Illustration

  • Fig. 1 (Clause 2.2.1) shows a typical 45° tee geometry.

2. Dimensions & Tolerances (Clause 2.2.2)

Size (mm)Laying Length Z (mm)Laying Length Z1 (mm)
2027 ± 36 + 2 / 0 - 1
2533 + 37 + 2
3242 + 4 / 2 - 38 + 2 / -1
4051 + 5 / -310 + 2 / 0 - 1
5063 + 6 / -312 + 2 / 1
6379 + 7 / -314 + 2 / -1
7594 + 9 / -317 + 2 / -1
90112 + 11 / -320 + 3 / 1
110137 - 4 / +1324 + 8 / -1
125157 + 15 / 427 - 1 / +3
140175 + 17 / 530 + 4 / 1
160200 - 6 / +2035 + 4
  • Note: Larger sizes of 45° elbows/tees are not recommended.

3. Socket Dimensions

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

4. Marking Requirements (Clause 3)

  • Manufacturer's name/ID.
  • Fitting size and class (working pressure).

Summary Diagram of 45° Tee Dimensions

flowchart TB
    A[Main Pipe] -->|Laying Length Z
2.2.2Dimensions and Tolerances

IS 7834 Part 5 (1987) — Dimensions and Tolerances for 45° Tees

Key Specifications:

  • Laying Lengths (Z and Z1) with tolerances for 45° tees are given in the table below:
Size (mm)Z (mm)Z1 (mm)
2027 ± 36 +2 / 0 -1
2533 +37 +2
3242 +4 / 2 -38 +2 / -1
4051 +5 / -310 +2 / 0 -1
5063 +6 / -312 +2 / -1
6379 +7 / -314 +2 / -1
7594 +9 / -317 +2 / -1
90112 +11 / -320 +3 / -1
110137 +13 / -424 +8 / -1
125157 +15 / +427 +3 / -1
140175 +17 / +530 +4 / -1
160200 +20 / -635 +4
  • Socket dimensions (inside diameter and length) must comply with IS 7834 Part 1 (1987).

Marking Requirements:

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

Notes:

  • Higher sizes of 45° elbows are not recommended by ISO.
  • The laying length tolerances ensure proper fit and function in piping systems.

Diagram: Typical 45° Tee Dimensions

graph TD
    A[Main Pipe] -->|Length Z| B[Branch Pipe]
    B -->|Length Z1| C[Socket]
    style A fill:#f9f,stroke:#333,stroke-width:
2.2.3Socket Inside Diameter and Length

IS 7834 Part 5 (1987) - Socket Inside Diameter and Length for 45° Tees

Key Specifications:

  • Socket inside diameter and socket length must conform to IS 7834 Part 1 (1987).
  • 45° tees dimensions (laying length) are given in the table below:
Size (mm)Laying Length Z (mm)Socket Length Z1 (mm)
2027 ± 36 +2 / 0 -1
2533 + 37 +2
3242 + 4 / 2 -38 +2 / -1
4051 + 5 / -310 +2 / 0 -1
5063 + 6 / -312 +2 / 1
6379 + 7 / -314 +2 / -1
7594 + 9 / -317 +2 / -1
90112 + 11 / -320 +3 / 1
110137 - 4 / +1324 +8 / -1
125157 + 15 / 427 -1 / +3
140175 + 17 / 530 +4 / 1
160200 - 6 / +2035 +4

Notes:

  • Higher sizes of 45° elbows are not recommended by ISO.
  • Marking on fittings must include:
    • Manufacturer's name or ID mark
    • Size and pressure class

Reference:

  • For detailed inside diameter and socket length values, refer to IS 7834 Part 1 (1987).

flowchart LR
    A[45° Tee Socket] --> B[Inside Diameter]
    A --> C[Socket Length]
    B & C --> D[Conform to IS 783
3Marking

IS 7834 Part 5 — Marking for 45° Tee PVC Socket Fittings

Key Marking Specifications (Clause 3)

Each 45° tee fitting shall be marked with:

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

Dimensional Table for 45° Tee Laying Length (Clause 2.2.2)

Size (mm)Z (mm)Z1 (mm)
2027 ± 36 + 2 / 0 - 1
2533 + 37 + 2
3242 + 4 / 2 - 38 + 2 / -1
4051 + 5 / -310 + 2 / 0 - 1
5063 + 6 / -312 + 2 / 1
6379 + 7 / -314 + 2 / -1
7594 + 9 / -317 + 2 / -1
90112 + 11 / -320 + 3 / 1
110137 - 4 / +1324 + 8 / -1
125157 + 15 / 427 - 1 / +3
140175 + 17 / 530 + 4 / 1
160200 - 6 / +2035 + 4

Note: Higher sizes of 45° elbows are not recommended.

Additional Notes:

  • Inside diameter and socket length must comply with IS 7834 Part 1 (1987).
  • Injection molded PVC socket fittings have related parts covering elbows, unions, caps, etc.

Summary Diagram of Marking Information

graph TD
A[Fitting Marking] --> B[Manufacturer's Name
3.1Standard Marking Details

IS 7834 Part 5: Standard Marking Details for 45° PVC Tees

Key Marking Specifications (Clause 3)

  • Each tee fitting must be marked with:
    • Manufacturer's name or identification mark
    • Size of the fitting
    • Appropriate class (working pressure rating)

Dimensional Table for 45° Tees Laying Length (Clause 2.2.2)

Size (mm)Z (mm)Z1 (mm)
2027 ± 36 + 2 / 0 - 1
2533 + 37 + 2
3242 + 4 / 2 - 38 + 2 / -1
4051 + 5 / -310 + 2 / 0 - 1
5063 + 6 / -312 + 2 / 1
6379 + 7 / -314 + 2 / -1
7594 + 9 / -317 + 2 / -1
90112 + 11 / -320 + 3 / 1
110137 - 4 / +1324 + 8 / -1
125157 + 15 / 427 - 1 / +3
140175 + 17 / 530 + 4 / 1
160200 - 6 / +2035 + 4

Note: Higher sizes of 45° elbows are not recommended as per ISO.

Additional References

  • Socket inside diameter and length per IS 7834 Part 1.
  • The standard covers injection moulded PVC fittings with solvent cement joints for water supply.

flowchart LR
    A[45° Tee Fitting] --> B{Marking}
    B --> C[Manufacturer's Name/

Popular Questions About IS 7834 Part 5

?What are the dimensional tolerances specified for 45° tees under IS 7834 Part 5?

Under IS 7834 Part 5 (1987), the dimensional tolerances for 45° tees (injection moulded PVC socket fittings) are specified mainly for two key dimensions: Z (laying length) and Z1.

Dimensional Tolerances for 45° Tees (Selected Sizes)

Size (mm)Z (mm) ToleranceZ1 (mm) Tolerance
2027 ± 36 +2 / 0 -1
2533 +37 +2
3242 +4 / -38 +2 / -1
4051 +5 / -310 +2 / 0 -1
5063 +6 / -312 +2 / +1
6379 +7 / -314 +2 / -1
7594 +9 / -317 +2 / -1
90112 +11 / -320 +3 / +1
  • Z = Laying length of the tee branch.
  • Z1 = Length of the socket.

Notes:

  • Tolerances vary slightly with size.
  • Larger sizes beyond 160 mm are not recommended as per ISO.
  • Socket inside diameter and length follow IS 7834 Part 1.

This ensures proper fitment and pressure rating compliance for water supply PVC tees.

Loading diagram...

For exact tolerances on all sizes, refer to the detailed table in Clause 2.2.2 of IS 7834 Part 5.

?Which materials and manufacturing processes are mandated for these PVC fittings?

According to IS 7834 Part 5 (1987), the materials and manufacturing processes for injection moulded PVC 45° tees for water supplies must:

  • Material: Use PVC conforming to the general requirements specified in IS 7834 Part 1 (1987), which covers injection moulded PVC socket fittings with solvent cement joints.
  • Manufacture: The fittings must be produced by injection moulding.
  • Testing & Inspection: Follow the methods of test, sampling, and inspection as per IS 7834 Part 1.
  • Marking & Dimensions: Comply with specified dimensions, tolerances, and marking detailed in Part 5 and Part 1.

Summary:

AspectRequirement
MaterialPVC as per IS 7834 Part 1
ManufacturingInjection moulding
Joint TypeSolvent cement joints
Testing & InspectionPer IS 7834 Part 1
DimensionsAs per Part 5 tables (e.g., laying length)

This ensures uniform quality and compatibility for water supply PVC fittings.

?How should 45° tees be marked according to the standard?

According to IS 7834 Part 5 (1987), marking of 45° tees should include:

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

Key Points on 45° Tee Marking:

Marking DetailsDescription
Manufacturer's IdentificationName or mark for traceability
SizeNominal size in mm
Pressure ClassWorking pressure class rating

Dimensional Reference (Clause 2.2.2):

  • The laying length (Z and Z1 dimensions) for various sizes are specified with tolerances.
  • For example, for 20 mm size:
    • Z = 27 ± 3 mm
    • Z1 = 6 + 2 / 0 - 1 mm

Additional Notes:

  • Internal socket diameter and length must comply with IS 7834 Part 1.
  • Higher sizes of 45° elbows are not recommended.

This ensures uniformity and traceability in manufacturing and installation.

Loading diagram...

This marking practice aids quality control and proper identification on site.

?What pressure classes are applicable to these fittings?

Applicable Pressure Classes for IS 7834 Part 5 (45° PVC Tees):

  • As per Clause 3 (Marking), each fitting must be marked with the appropriate class (working pressure).
  • The standard refers to pressure classes defined in IS 7834 Part 1 (General Requirements).
  • Typically, IS 7834 fittings are available in pressure classes such as 6 bar, 10 bar, and 16 bar, depending on size and application.
  • The exact pressure class for a fitting must be marked on the fitting itself, corresponding to its working pressure rating.

Summary:

ParameterDetails
Pressure ClassesUsually 6, 10, 16 bar (verify marking)
Marking RequirementManufacturer's name, size, pressure class
Reference for Pressure ClassesIS 7834 Part 1 (General requirements)

For design and selection, always confirm the pressure class marked on the fitting and ensure compatibility with system pressure.

Loading diagram...

Note: Verify pressure class with manufacturer and IS 7834 Part 1 for precise ratings.

?Are there size limitations or recommendations for 45° tees in this standard?

IS 7834 Part 5 (1987) on 45° Tees: Size Limitations & Recommendations

  • The standard provides laying lengths (Z, Z1) for 45° tees across sizes 20 mm to 160 mm, as per the table in Clause 2.2.2.
  • For sizes below 20 mm, data is not specified.
  • Note: Larger sizes beyond 160 mm are not recommended, aligning with ISO guidelines.
  • The inside diameter and socket length must comply with IS 7834 Part 1.
  • Marking requirements include manufacturer ID, size, and pressure class.
Size (mm)Z (mm)Z1 (mm)
2027 ± 36 + 2 (0 - 1)
5063 + 6 - 312 + 2 1
90112 + 11 320 + 3 1
160200 - 6 + 2035 + 4

Summary:

  • Use 45° tees within 20 mm to 160 mm diameter.
  • Avoid sizes larger than 160 mm due to manufacturing and performance concerns.
  • Follow dimensional and marking requirements strictly.
Loading diagram...

This ensures compliance with IS 7834 Part 5 for safe and standardized 45° tee fittings.

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