chemically resistant glazed stoneware pipes and fittings

IS 3006: Scope - Key Dimensions & Specifications

The code covers dimensions and specifications for stoneware pipes and fittings, focusing on practical limits ensuring utility and serviceability.

Key Tables & Dimensions (All in mm):

Summary Diagram of Fitting Dimensions

graph TD
A[Pipe Internal Diameter] --> B[Half-Section Bends]
A --> C[Sockets & Barrels]
B --> D[Quarter Channel Bends]
B --> E[Eighth Channel Bends]
C --> F[Thickness, Socket Depth, Shoulder, Grooving Length]

Practical Notes:

• Dimensions must not affect utility or serviceability.
• Jointing space between spigot and socket shoulder should be minimal to reduce corrosion risk.
• Tables provide standard dimensional references for design and manufacturing.

For detailed design, refer to specific tables (7-12, 1, 11, 12) in IS 3006 Clause 16.1 and 13.1.

IS 3006: Key Definitions & Dimensions for Fittings

• Clause 16.1: Dimensions of fittings (bends, interceptors) must conform to Tables 7–12 and Fig. 8 without impairing utility or serviceability.

Important Dimension Tables (All in mm)

Additional Notes:

• Internal diameters (d, D) for taper pipes and channels are standardized (see Clause 12.1).
• Dimensions ensure compatibility and serviceability.
• For exact dimensions refer to respective tables for your pipe diameter and bend type.

Example: Half-Section One-Quarter Channel Bends (Table 7)

Summary Diagram of Bend Types

flowchart LR
    A[Pipe] -->

IS 3006: Right- and Left-Hand Fittings — Key Points & Dimensions

1. Definitions (Clause 3.1)

• Right-hand fitting: Viewed from spigot to socket, the arm/socket projects to the right.
• Left-hand fitting: Viewed similarly, the arm/socket projects to the left.

2. Key Dimension Tables for Bends & Fittings (Clause 16.1 & 12.1)

3. Typical Dimension Symbols

• a: Length of socket or arm projection
• r: Radius of bend
• D: Internal diameter
• A, B, C, E, F, G: Mortar seating dimensions for covers

Summary Diagram: Right- vs Left-Hand Fitting

flowchart LR
    A[View from Spigot to Socket]
    A -->|Arm projects right| RH[Right-Hand Fitting]
    A -->|Arm projects left| LH[Left-Hand Fitting]

Practical Use

• Select fitting type by arm projection direction (right/left).
• Use dimension tables (7-12) for correct sizing.
• Ensure socket/sp

IS 3006 — General Quality Requirements: Summary

Sampling & Inspection Procedure (Clause 3.2 & Table 13)

• Sample Size: Depends on lot size (see Col 2 & 3, Table 13).
• Inspection: Pipes/fittings inspected for:
  • General Quality (Clause 4.1)
  • Dimensions (Section A & B)
• Acceptance Criteria:
  • If defectives ≤ acceptance number a1 → Lot accepted.
  • If defectives ≥ rejection number r → Lot rejected.
  • If defectives between a1 and r → Take second sample.
    • Combined defectives ≤ a1 → Lot accepted.
    • Combined defectives ≥ r → Lot rejected.

Key Table Extract (Table 13: Sample Size & Criteria for General Quality & Dimensions)

Notes:

• General Quality includes visual defects, dimensional accuracy.
• Minor blemishes are handled separately (Clause 4.2).
• Inspection is random and per lot basis.

Flowchart of Sampling Decision Process:

IS 3006: Glazing of Pipes and Fittings - Key Points

Clause 4.1 - Quality of Glazing

• Pipes and fittings must be sound, free from defects affecting strength and durability.
• The glaze must be free from crazing (fine cracks).
• When struck lightly, pipes/fittings should emit a sharp, clear note indicating soundness.

Jointing (Appendix A)

• Jointing material should be chemically resistant and adhere strongly.
• Minimize jointing material contact with corrosive liquids by keeping the spigot-to-socket shoulder gap narrow (see dimension F in Table 1).

Grooving (Clause 14.1)

• Interior of sockets and exterior of spigots shall be circumferentially grooved.
• Groove length on spigot = 1.5 × socket depth.
• Groove depth = 1 mm to 2 mm.

Dimensions Reference (Clause 16.1)

• Pipes and fittings dimensions are standardized (see Tables 7-12).
• Example: Round mouth gully trap (100×100 mm) has dimension A = 330 mm, d = 100 mm.

Summary Table: Glazing & Jointing Specifications

flowchart TD
    A[Pipe & Fitting] --> B[Glazing Check]
    B -->|No crazing| C[Soundness Test]
    C -->|Clear note on strike| D[Accept]
    B -->|Crazing present| E[Reject]
    D --> F[Grooving: 1-2 mm depth]
    F --> G[Jointing: Chemically resistant material]

For detailed dimensions, refer to Tables 7-12 in IS 3006.

IS 3006: Key Specifications for Tests

1. Number of Pipes/Fittings to be Tested (Clause 2.2, Table E-2)

Tests include:

• Absorption (6.3)
• Resistance to acids (6.4)
• Resistance to alkali (6.5)
• Crushing strength (6.6)

2. Sampling Size & Criteria for Conformity (Clause 1.2, Table 13)

3. Testing Facilities (Clause 6.1)

• Manufacturer must provide all apparatus, labor, and test pieces at their own cost.

4. Criteria for Conformity (Clause 3.5, Table E-3)

• All test specimens must satisfy requirements for acid resistance, magnesium sulphate resistance, and crushing strength tests.

Summary Diagram: Testing Process Flow

flowchart TD
    A[Select Lot] --> B[Determine Lot Size]
    B --> C{Lot Size Range}
    C -->|Up to 150| D[Test 2 Pipes]
    C -->|151-300| E[Test 3 Pipes]
    C -->|301-500| F[Test 4 Pipes

IS 3006: Key Specifications & Tables for Materials (Stoneware Pipes & Fittings)

1. Material Requirements (Clause 3.5)

• Test specimens must satisfy:
  • Resistance to acids and magnesium sulphate.
  • Crushing strength tests.
• Jointing materials must be chemically resistant and inert to subsoil water (Appendix A).

2. Material Properties & Units (SI Units)

3. Dimensional Tables for Fittings (Clause 16.1 & 12.1)

• Round Mouth Gully Traps (Table 11)

  • Sizes: 100×100 to 150×150 mm
  • Key dimensions: A, C, d, D, D', FF, G (in mm)

• Square Mouth Gully Traps (Table 12)

  • Sizes: 100×100 to 180×150 mm
  • Dimensions include A, C, d, D, D', EFFG (in mm)

• Bends Dimensions (Tables 7-9, 12.1)

  • Quarter, eighth, sixteenth channel bends with short, medium, long types.
  • Internal diameters range from 100 mm to 600 mm.
  • Dimensions a, r, Y, etc. vary by bend type and size.

Example: Quarter Bend Dimensions (Table 2, Clause 12.1)

Notes on Jointing (Appendix A

IS 3006 - Key Dimensions for Pipes and Fittings

1. Dimensions of Channel Bends (Clause 16.1)

2. Channel Interceptors (Table 10)

3. Spigots and Sockets (Clause 17.1)

• Spigots and sockets conform dimensionally to straight pipes and sockets in Table 1.
• Internal diameters for taper pipes and fittings are selected from Table 1 (Clause 12.1).

4. Sections of Pipes and Fittings (Clause 1.2)

• Section A: Straight pipes and fittings forming part of the pipeline; require accurate dimensional conformity.
• Section B: Common fittings, hand-moulded; dimensional accuracy less strict.

Summary Diagram of Channel Bend Types

flowchart LR
    A[Quarter Channel Bend] -->|Dimensions from Table 7| B((Short, Medium, Long))
    C[One-Eighth Channel Bend] -->|Dimensions from Table 8| B
    D[One-Sixteenth Channel Bend] -->|Dimensions from Table 9| B

**

IS 3006: Thickness of Barrels, Sockets, and Bends

1. Thickness of Barrels & Sockets (Clause 10.1 & Table 1)

• Mean Thickness = (Least Thickness + Greatest Thickness) / 2
• Minimum mean thickness for barrels and sockets is given in Table 1 (Column 2).
• Thickness of barrel and socket measured separately.

2. Permissible Variation (Clause 10.2)

3. Socket Shoulder Width (Clause 10.1)

• Width of shoulder E ≥ Mean thickness of barrel + C (from Table 1, Col 4)

4. Key Dimensions for Barrels and Sockets (Table 1)

5. Bends Dimensions (Clause 12.1)

• One-Quarter Bends (Table 2): Dimensions vary

Grooving Specifications (IS 3006)

• Grooving Location:

  • Interior of sockets and exterior of spigots shall be grooved circumferentially (Clauses 14.1, 18.1).

• Grooving Length on Spigot:

  • Length = 1.5 × Depth of socket (Clause 14.1, 18.1).

• Grooving Depth:

  • Between 1 mm and 2 mm (Clause 14.1).
  • Not less than 1.5 mm (Clause 18.1).

Key Dimensions from Table 1 (Clause 13.1)

Summary:

• Grooving ensures proper jointing and sealing.
• Length of grooving on spigot = 1.5 × socket depth.
• Depth of grooves: 1–2 mm (preferably ≥1.5 mm).
• Dimensions vary with pipe diameter as per Table 1.

flowchart

Key Specifications for Spigots and Sockets (IS 3006)

Clause 17.1:

• Spigots and sockets of fittings shall conform to dimensions of straight pipes and sockets as per Table 1 (not provided here, but refers to standard pipe dimensions).

Grooving (Clause 14.1):

• Interior of sockets and exterior of spigots shall be circumferentially grooved.
• Groove length on spigot = 1.5 × depth of socket.
• Groove depth = 1 mm to 2 mm.

Important Dimension Tables for Fittings (Clause 16.1 & 12.1)

Summary Diagram: Spigot and Socket Grooving

graph LR
A[Spigot] -- Grooved Length = 1.5 × Socket Depth --> B[Socket]
A -- Groove Depth 1-2 mm --> B

Notes:

• Dimensions are in millimeters.
• Grooving ensures proper sealing and joint strength.
• For exact pipe/socket size matching, refer to Table 1 in IS 3006 for straight pipe dimensions.
• Use Tables

IS 3006: Jointing - Key Specifications & Tables

1. Jointing Material (Appendix A)

• Must be chemically resistant and adhere strongly to stoneware.
• Should be inert to subsoil water.
• Minimize jointing material contact by keeping the spigot-to-socket shoulder gap (F) as narrow as possible.

2. Grooving (Clause 14.1)

• Sockets (interior) and spigots (exterior) must be circumferentially grooved.
• Groove length on spigot = 1.5 × socket depth.
• Groove depth: 1 mm to 2 mm.

3. Dimensional Tables for Gully Traps (Clause 16.1)

(Refer to Tables 11 & 12 for full dimensions)

4. Junctions (Clause 12.1.1)

• Branch diameter ≤ barrel diameter.
• Branch angle: 45° ± 3° or 90° ± 3°.
• Socket of branch arm close to main socket.
• Barrel length options: 600 mm, 750 mm, 900 mm.

Summary Diagram of Jointing Groove

graph LR
A[Socket Interior] -- Groove Depth 1-2 mm --> B[Groove]
C[Spigot Exterior] -- Groove Length = 1.5 × Socket Depth --> B
B --> D[Jointing Material]

For detailed fitting dimensions and further jointing details, refer to IS 3006 Tables 1-6 and Appendix A.

IS 3006: Mechanical Strength and Crushing Test Key Points

Crushing Strength Test (Clause 6.6 & Appendix D)

• Minimum Crushing Strength:
  ≥ 16 kN per linear metre along full pipe length (shoulder to spigot).

• Test Setup:

  • Use a crushing strength testing machine as per Appendix D.
  • Load applied continuously; no prolonged holding under load (Clause D-3.2).
  • Structural steel beam supports must have moment of inertia ≥ IS beam 250×200×40 kg/m (Clause D-1.5).
  • Flange width ≥ 200 mm.
  • Gap width between bearing strips = D/12 (minimum 25 mm), where D = pipe diameter.

Visual Setup (Fig. 9 Crushing Test Rig)

graph LR
A[Structural Steel Beam] -->|Supports| B[Pipe under test]
B -->|Load applied continuously| C[Crushing Strength Machine]
B -.->|Gap width = D/12 (≥25 mm)| D[Gap between bearing strips]

Evaluation Criteria (Clause 3.2)

• No pitting, softening, spalling, or cracking observed post-test.

Summary Table:

This ensures pipes meet mechanical strength for safe structural use.

IS 3006: Hydraulic Test Key Points

• Test Pressure:
  • Straight pipes: 0.3 MPa (barrel)
  • Fittings: 0.15 MPa
• Pressure Application Rate: Max 0.075 MPa per 5 seconds
• Duration: Maintain full pressure for at least 5 seconds
• Air Removal: Ensure all air is removed before testing
• Applicability: All pipes and fittings except channel fittings (Clause 6.2.1)

Number of Pipes/Fittings to Test (Clause 2.2, Table E-2)

Test Setup (Clause 1.1)

• Pipe supported horizontally on two bearings parallel to axis
• Load applied via a third bearing on top of barrel (Fig. 9 reference)

Summary Diagram

flowchart LR
    A[Start] --> B[Remove all air from pipe]
    B --> C[Apply pressure at ≤0.075 MPa/5s]
    C --> D[Reach test pressure: 0.3 MPa (pipes), 0.15 MPa (fittings)]
    D --> E[Maintain pressure for 5 seconds]
    E --> F{No leakage or injury?}
    F -- Yes --> G[Test Passed]
    F -- No --> H[Test Failed]

This ensures pipes/fittings meet hydraulic integrity per IS 3006.

IS 3006: Inspection & Quality Control Key Points

Sampling & Inspection (Clause 3.2, E-1.2, E-2.1)

• Sampling based on lot size per Table 13 (sample size & acceptance/rejection criteria).
• Two-stage sampling:
  • Inspect first sample for defects (general quality & dimensions).
  • If defectives ≤ acceptance number (a1), lot accepted.
  • If defectives ≥ rejection number (r), lot rejected.
  • If defectives between a1 and r, inspect second sample and combine results.
• Inspection covers general quality (Clause 4.1) and dimensions (Sections A & B).

Table 13 Summary (Sample Size & Criteria)

(Second sample doubles cumulative size; acceptance/rejection numbers adjusted accordingly.)

Jointing Note (Appendix A)

• Use chemically resistant, inert jointing materials.
• Minimize jointing material contact by keeping spigot-to-shoulder gap (F) narrow (see Table 1).

Summary Flow for Inspection Decision

flowchart TD
    A[Select First Sample] --> B{Defectives ≤ a1?}
    B -- Yes --> C[Accept Lot]
    B -- No --> D{Defectives ≥ r?}
    D -- Yes --> E[Reject Lot]
    D -- No --> F[Select Second Sample]
    F --> G[Inspect Combined Samples]
    G --> H