Injection Moulded/Machined High-Density Polyethylene (HDPE) Fittings for Potable Water Supplies, Part 6: Specific Requirements for Pipe Ends

IS 8008 Part 6 - Scope Summary

• Pipe Ends Manufacturing:

  • 20 mm to 315 mm: Manufactured by injection moulding and machined if required.
  • 355 mm and above: Manufactured by machining from thick-walled extruded pipes or compression moulded slabs.

• Referenced Standards:

  • IS 8008 (Part 1): Injection moulded/machined HDPE fittings for potable water (General requirements).
  • IS 4984:1995: HDPE pipes for water supply.

• Rounding Off Values:

  • Follow IS 2:1960 for rounding numerical test results.
  • Retain significant figures equal to those specified in the standard.

• Related Parts (IS 8008 Series):

  Part	Description
  1	General requirements for fittings
  2	90° bends
  3	90° tees
  4	Reducers
  5	Ferrule reducers
  7	Sandwich flanges
  8	Reducing tees
  9	End caps

This scope defines manufacturing methods and cross-references related HDPE fitting standards for potable water supply.

flowchart LR
    A[Pipe Ends 20-315 mm] -->|Injection Moulding + Machining| B[Finished Pipe Ends]
    C[Pipe Ends ≥355 mm] -->|Machining from Extruded Pipes/Slabs| B
    B --> D[Use in Potable Water Supply]
    D --> E[Comply with IS 8008 & IS 4984]

IS 8008 Part 6: Key References, Tables & Specifications

1. Standards Breakdown (Foreword Table)

2. Dimension Table for Injection & Machined Pipe Ends (Clause 3.2.2)

Tolerance on dimensions:

• D, D4, Z: ± 2 mm
• H, L: ± 1 mm

3. Rounding Off Rule (IS 2:1960)

• Final test or calculated values must be rounded to the same number of significant figures as the specified value.

4. **BIS Certification & Marking (Clause 4

IS 8008 Part 6 - Manufacture: Key Points

• General Manufacture Requirements:
  As per Clause 3.2, manufacturing must comply with IS 8008 (Part 1): 2003 which covers materials, grades, sizes, performance, testing, sampling, and inspection.

• Manufacturing Methods (Clause 1.2):

  • Pipe ends 20 mm to 315 mm: Manufactured by injection moulding and machined if needed.
  • Pipe ends 355 mm and above: Made by machining from thick-walled extruded pipes or compression moulded slabs.

• Relevant Standards:

  IS No.	Title
  IS 8008 (Part 1): 2003	General requirements for injection moulded/machined HDPE fittings
  IS 4984: 1995	HDPE pipes for water supply

Summary Table for Manufacturing Method by Size

This ensures dimensional accuracy, material integrity, and compliance with potable water supply standards.

flowchart LR
    A[Pipe Ends 20-315 mm] --> B[Injection Moulding]
    B --> C[Machining if required]
    D[Pipe Ends ≥ 355 mm] --> E[Machining from extruded pipes or compression moulded slabs]

IS 8008 Part 6: Marking of Pipe-End Fittings

Key Specifications (Clause 4.1 & 4.2)

• Marking on each pipe-end fitting must include:

  • Manufacturer identification
  • Size of fitting
  • Grade of material
  • Class (working pressure rating)

• BIS Certification Mark (Clause 4.2):

  • Optional marking with the Standard Mark as per BIS Act, 1986.
  • License for use governed by BIS rules.

Important Dimensions for Pipe Ends (Table 1, Clause 3.2.2)

Tolerances:

Summary Diagram: Marking Requirements

flowchart TD
    A[Pipe-End Fitting] --> B[Marking]
    B --> C[Manufacturer ID]
    B --> D[Size]
    B --> E[Material Grade]
    B --> F[Class (Pressure Rating)]
    B --> G[BIS Standard Mark (Optional)]

IS 8008 Part 6: Dimensions and Tolerances for Pipe Ends

Key Specifications (Clause 3.2.2 & Table 1)

• Dimensions given for Injection and Machined Pipe Ends (all in mm):

(Refer full Table 1 for all sizes)

Tolerances

Notes

• Laying length (Z) is the overall length for fitting installation.
• Collar height (H) and welding length (L) vary with pressure rating (PN 6 or PN 10).
• Dimensions ensure proper fit and welding quality for pipe ends and fittings.
• Refer to Fig 1 in the standard for dimensional illustration.

flowchart LR
    A[Nominal Diameter (D)] --> B[Diameter for Manufacturing Reference (D3)]
    B --> C[Collar

IS 8008 Part 6: Material Requirements Summary

• General Material Requirements:
  Refer to IS 8008 Part 1 (2003) for comprehensive details on:

  • Material grades and types
  • Manufacturing processes
  • Performance criteria
  • Testing methods (mechanical, chemical)
  • Sampling and inspection procedures

• Fittings and Components:
  Specific parts have dedicated parts in IS 8008, e.g.:

  Part No.	Component	Focus Area
  Part 2	90° Bends	Material & dimensional specs
  Part 3	90° Tees	Material & dimensional specs
  Part 4	Reducers	Material & dimensional specs
  Part 5	Ferrule Reducers	Material & dimensional specs
  Part 7	Sandwich Flanges	Material & dimensional specs
  Part 8	Reducing Tees	Material & dimensional specs
  Part 9	End Caps	Material & dimensional specs

• Key Material Properties to Check:

  • Yield strength
  • Tensile strength
  • Impact resistance
  • Corrosion resistance

Typical Material Specification Table (Example)

Notes:

• Always cross-reference the specific fitting/component part for detailed specs.
• Material tests must follow IS 8008 Part 1 test methods.
• Sampling and inspection ensure compliance before manufacture.

flowchart LR
    A[Material Requirements] --> B[General - IS 8008 Part 1]
    A --> C[Fittings & Components]
    C --> D[90° Bends - Part 2]
    C --> E[90° Tees - Part 3]
    C --> F[Reducers - Part 4]
    C --> G[Ferrule Reducers

Welding and Jointing Requirements - IS 8008 Part 6

Key Points from IS 8008 Part 6:

• Weld Length: Kept constant with uniform tolerance to ensure consistent strength.
• Rewelding: Allowed if initial weld is rejected, ensuring quality control.
• Pipe Ends for Welding (Clause 3.2.3):
  • Outside diameter and wall thickness must comply with Clause 8, IS 8008 Part 1.
  • Ensures dimensional compatibility and proper fit-up for welded joints.

Important Specifications (from related parts):

Typical Welding Joint Parameters (General Practice):

Summary Diagram:

flowchart TD
    A[Pipe Ends] --> B[Check OD & Thickness per IS 8008 Part 1]
    B --> C[Prepare Ends for Welding]
    C --> D[Welding Process]
    D --> E{Weld Acceptable?}
    E -- Yes --> F[Final Inspection]
    E -- No --> G[Rewelding]
    G --> D

Note: For detailed dimensional tables and welding procedure specifications, refer to Clause 8 of IS 8008 Part 1 and relevant parts for fittings.

IS 8008 Part 6: Inspection and Testing Key Points

1. General Requirements (Clause 3.1)

   • Material, manufacture, grade, sizes, performance, test methods, sampling, and inspection conform to IS 8008 Part 1.

2. Rounding Off Results

   • Final test values must be rounded as per IS 2:1960 rules, retaining the same number of significant digits as specified.

3. Dimensions for Injection and Machined Pipe Ends (Table 1, Clause 3.2.2)

   • Dimensions in mm for nominal diameters, collar diameter, laying length (Z), collar height (H), welding length (L) for PN 6 and PN 10 pressure ratings.
   • Tolerances:
     • Diameter for manufacturing reference (D): ±2 mm
     • Collar diameter (D4): ±2 mm
     • Laying length (Z): ±2 mm
     • Collar height (H): ±1 mm
     • Welding length (L): ±1 mm

(Refer to full table for all sizes)

4. Certification Marking (Clause 4.2.1)
   • Use of BIS Standard Mark follows Bureau of Indian Standards Act, 1986.

Summary Diagram: Inspection & Testing Process Flow

BIS Certification Marking (IS 8008 Part 6: Clause 4.2)

• Standard Mark usage is governed by the Bureau of Indian Standards Act, 1986.
• Manufacturers must obtain a licence from BIS to use the Standard Mark on pipe-end fittings.
• Marking ensures conformity to IS standards and quality assurance.

Key Table: Dimensions for Injection and Machined Pipe Ends (Clause 3.2.2)

Full table available in Clause 3.2.2.

Tolerances on Dimensions

Summary

• Certification Mark confirms compliance with BIS standards.
• Dimensions and tolerances for pipe ends ensure interchangeability and quality.
• Refer to IS 8008 Part 6 Table 1 for detailed dimensions per nominal diameter and pressure rating (PN 6, PN 10).

flowchart TD
    A[BIS Certification Mark] --> B[Licence from BIS]
    B --> C[Marking on Pipe-End Fittings]
    C --> D[Conformance to IS 8008]
    D --> E[Quality Assurance]

For

IS 8008 Part 6 (2003) — Annexures & Illustrations Key Data

1. Table 1: Dimensions for Injection and Machined Pipe Ends (Clause 3.2.2)

Complete table available in the standard.

2. Tolerances on Dimensions

3. General Specifications

• Dimensions are in millimeters.
• Rounding off numerical values follows IS 2:1960 rules.
• Use of BIS Standard Mark is governed by the BIS Act, 1986.

Summary Diagram: Pipe End Dimensions

flowchart LR
    D["Diameter for Manufacturing Reference (D)"]
    D4["Collar Diameter (D4)"]
    Z["Laying Length (Z)"]
    H["Collar Height (H)