Plastics Bib Taps, Pillar Taps, Angle Valves and Stop Valves for Hot and Cold Water Services

IS 9763 - Scope: Sampling and Testing

The standard defines sampling scales and criteria for conformity for various tests on pipes.

Key Points:

• Sampling Scales (Table 7):

  • Scale 1: For visual inspection (Clause 2.1, B-2.1).
  • Scale 2: For dimensions, construction, minimum thickness, hydraulic pressure test (Clause 2.2, B-2.2).

• Sampling Procedure:

  • Samples are selected randomly from the lot.
  • If Scale 1 samples are insufficient for Scale 2 tests, select directly from the lot.

• Tests Covered:

  • Visual requirements (8.2, 8.3)
  • Dimensions (6)
  • Construction (8.1, 8.2, 8.3, 8.5)
  • Minimum thickness (8.4)
  • Hydraulic pressure test (9.4)

Typical Sampling Table (Table 7) Format:

(Note: Actual numbers must be confirmed from IS 9763 Table 7.)

flowchart TD
    Lot[Lot of Pipes]
    Lot -->|Random Sampling| Scale1[Scale 1 Sampling]
    Lot -->|Random Sampling| Scale2[Scale 2 Sampling]
    Scale1 --> VisualInspection[Visual Inspection (8.2, 8.3)]
    Scale2 --> DimensionalTests[Dimensions (6), Construction (8.x), Thickness (8.4), Pressure Test (9.4)]

Summary: Use Scale 1 for visual checks and Scale 2 for detailed dimensional and pressure tests, with sample sizes per Table 7, ensuring random selection to verify conformity.

IS 9763: Key References, Dimensions, and Sampling

1. References (from Table 2)

• IS 13193:1992 — Polyalkylene terephthalates (PET and PBT) for moulding and extrusion.
• IS 13464:1992 — Polyamide (Nylon 66) material for moulding and extrusion.
• Standards cover safe use in contact with foodstuffs, pharmaceuticals, and drinking water.

2. Dimensions of Bib Tap (Clause 6.1, Table 3)

3. Sampling (Clause 1.3, B-1.3)

• Number of samples depends on lot size.
• Sampling scales are detailed in Table 7 (Annex A).
• Ensures conformity via defined tests and criteria.

This concise summary aids in quick reference for material standards, bib tap dimensions, and quality sampling per IS 9763.

IS 9763: Key Definitions & Dimensions

1. Definitions (Clause 3.1):

   • Follow definitions in IS 10446 plus additional ones in IS 9763.

2. Dimensions of Bib Taps (Clause 6.1, Table 3):

3. Dimensions of Angle Valves (Clause 6.4, Table 6):

4. Acceptance Criteria (Clause 2.2.1):
   • Lot acceptance based on defective items ≤ acceptance number 'a' from Table 7, scale 2.

This ensures compliance with dimensional and quality requirements for bib taps and angle valves per IS 9763.

IS 9763 - Materials for Taps and Valves

Key Materials & References (Clause 4.1, Table 1)

Important Specifications:

• Materials must not affect water quality (taste, smell, appearance).
• Must be corrosion-resistant.
• Must withstand maximum operating pressures (see Table 2 in IS 9763).
• Plastic materials in contact with potable water safe up to 90ºC.

Additional Notes:

• Refer IS 13193:1992 for Polyalkylene terephthalates (PET, PBT).
• Refer IS 13464:1992 for Nylon 66.
• Minimum thickness and pressure ratings are specified in Clause 8.4 and Table 2 respectively.

flowchart LR
    A[Tap/Valve Components] --> B[Body]
    A --> C[Bonnet]
    A --> D[Spindle]
    A --> E[Handle]
    A --> F[Seal]

    B --> G[PP Copolymer, Nylon 66, PBT, ABS, PVC]
    C --> G
    D --> G
    E --> H[PP Copolymer, PBT, Poly-Acetal, ABS]
    F --> I[Rubber, Nitrile PVC, Thermoplastic Elastomer]

For detailed pressure and thickness data, consult **Table

IS 9763: General Requirements – Key Specifications & Sampling Acceptance

Sampling Scales & Acceptance Criteria (Table 7 Summary)

Key Points:

• Lot conformity is based on the number of defective items ≤ acceptance number 'a' from the relevant scale.
• Sampling can be from previously selected samples or directly from the lot.
• Different quality aspects use different sampling scales:
  • Visual: Scale 1
  • Dimensional, construction, thickness, hydraulic: Scale 2
  • Other requirements: Scale 3

Practical Use:

• Identify the requirement type.
• Refer to Table 7 for sample size and acceptance number 'a'.
• Check defective count ≤ 'a' → Lot accepted.

flowchart TD
    A[Start: Identify Requirement] --> B{Requirement Type}
    B -->|Visual| C[Use Scale 1 (Col 3)]
    B -->|Dimension/Construction/Thickness/Hydraulic| D[Use Scale 2 (Col 5)]
    B -->|Others| E[Use Scale 3 (Col 6)]
    C --> F[Check defective ≤ 'a' → Accept Lot]
    D --> F
    E --> F

This ensures consistent quality control per IS 9763.

Here are the key dimensions for valves and taps as per IS 9763:

1. Angle Valve (Clause 6.4, Table 6)

2. Bib Tap (Clause 6.1, Table 3)

3. Pillar Tap (Clause 6.2, Table 4) - 15 mm (1/2") only

4. Stop Valve (Clause 6.3, Table 5)

• Internal Thread | Dimension | 15 mm (1/2") | 20 mm (3/4") | |

IS 9763: Identification and Marking Key Points

• Clause 17.5 (Identification):
  Each product must be clearly identified with the manufacturer's name or trademark, batch/lot number, and relevant IS standard number for traceability.

• Clause 11.1.1 & 11.1.2 (Standard Mark Usage):

  • The BIS Standard Mark can be applied on taps and valves.
  • Use of the Standard Mark is regulated by the Bureau of Indian Standards Act, 1986.
  • Licensing conditions for the Standard Mark must be obtained from BIS.

• Marking Specifications:

  • Markings should be durable, legible, and placed on the product or packaging.
  • Include:
    • Manufacturer's name/trademark
    • IS code number (IS 9763)
    • Batch or lot number
    • BIS Standard Mark (if licensed)

Summary Table for Identification Marking

flowchart LR
    A[Product] --> B[Mark Manufacturer Name]
    A --> C[Mark IS Code Number]
    A --> D[Mark Batch/Lot Number]
    A --> E{BIS License?}
    E -- Yes --> F[Mark BIS Standard Mark]
    E -- No --> G[No BIS Mark]

This ensures product traceability and compliance with IS 9763 requirements.

IS 9763: Construction, Workmanship and Finish - Key Points

1. Control Device Orientation

• Cold water control: Right side (viewed from front)
• Hot water control: Left side (viewed from front)
  (Clause 7.2)

2. Sampling & Acceptance Criteria

• Visual Requirements (Scale 1):
  • Lot accepted if defective items ≤ acceptance number 'a' (Table 7, col 3)
• Dimensional, Construction, Thickness & Hydraulic Test (Scale 2):
  • Sampling as per Table 7, applied for clauses 6, 8.1-8.5, 9.4
• Conformance for Construction & Finish (Scale 3):
  • Defective items ≤ acceptance number 'a' (Table 7, col 6)

3. Table 7 (Sampling Plan Summary)

(Refer IS 9763 Table 7 for exact values of n and a based on lot size)

Summary:

• Use sampling scales 1, 2, and 3 for different quality checks.
• Acceptance is based on maximum allowable defectives 'a' per Table 7.
• Orientation of water controls is fixed (hot-left, cold-right).

flowchart LR
    A[Lot Sampling] --> B{Check Visuals (Scale 1)}
    B -- Defects ≤ a1 --> C[Accept Lot]
    B -- Defects > a1 --> D{Check Dimensions & Construction (Scale 2)}
    D -- Defects ≤ a2 --> C
    D -- Defects > a2 --> E{Check Construction & Finish (Scale 3)}
    E -- Defects ≤ a3 --> C
    E -- Defects > a3 --> F[Reject Lot]

For exact sample sizes and acceptance numbers, refer

IS 9763: Key Formulas, Tables & Specifications for Tests

1. Sampling Scale (Clause 1.3, B-1.3)

• Number of samples depends on lot size.
• Use Table 7 (Annex B) for selecting sample size for various tests.
• Sampling scales include Scale 1 and Scale 2 depending on test type.

2. Acceptance Tests (Clause 10.3)

• All tests specified in the standard must be performed.
• Sampling and conformity criteria follow Annex B.
• Tests include dimensions, construction, thickness, hydraulic pressure, etc.

3. Production Routine Tests (Clause 10.2)

• Conducted by manufacturer as per Annex B sampling plan.
• Includes:
  • Drip proofness test
  • Hydraulic pressure test
  • Mechanical strength test

4. Sampling Scale 2 (Clause 2.2, B-2.2)

• Applies to:
  • Dimensions (Clause 6)
  • Construction (Clauses 8.1 to 8.5)
  • Minimum thickness (Clause 8.4)
  • Hydraulic pressure test (Clause 9.4)
• Samples can be from Scale 1 or directly from lot if insufficient.

Table 7 (Sampling Plan Example)

(Note: Refer to IS 9763 Annex B for exact values)

flowchart TD
    A[Lot Size] --> B{Select Sampling Scale}
    B -->|Scale 1| C[Sample Size from Table 7]
    B -->|Scale 2| D[Sample Size from Table 7]
    C --> E[Perform Acceptance Tests]
    D --> E
    E --> F

IS 9763 Key Points on Type, Production Routine, and Acceptance Tests

1. Types of Tests

• Type Tests (Clause 10.1.1):

  • Conducted at start of production or after major changes in design/material/method.
  • Two samples from first batch per nominal size tested.
  • Production continues only if both samples pass.

• Production Routine Tests (Clause 10.2):
  Performed on samples as per Annex B sampling plan:

  • Drip proofness test
  • Hydraulic pressure test
  • Mechanical strength characteristics

• Acceptance Tests (Clause 10.3):

  • All tests specified in the standard.
  • Sampling & conformity criteria per Annex B.

2. Sampling and Criteria (Annex B & Table 7)

• Sampling size depends on lot size (see Table 7, IS 9763).
• Criteria for conformity based on test results and sampling plan.

Summary Table:

flowchart TD
    A[Start of Production or Change] --> B[Type Tests (2 samples)]
    B -->|Pass| C[Production Routine Tests]
    C --> D[Acceptance Tests per Lot]
    D -->|Pass| E[Production Accepted]
    B -->|Fail| F[Production Halted]
    D -->|Fail| G[Lot Rejected]

Note: Refer to Annex B and Table 7 of IS 9763 for detailed sampling plans and acceptance criteria.

IS 9763: Standard Mark and Licensing Summary

• Clause 11.1.2:
  The use of the BIS Standard Mark is regulated by the Bureau of Indian Standards Act, 1986.
  Licensing conditions for manufacturers/producers to use the mark are governed by BIS rules. Details must be obtained directly from BIS.

• Clause 11.1.1:
  Taps and valves complying with IS 9763 may be marked with the BIS Standard Mark, indicating conformity.

• Sampling (Clause 1.3, Annex A):
  Sample size depends on lot size, following Table 7 (Scale of Sampling) for tests like hydraulic pressure and water tightness.

Key Points for Licensing & Marking

Typical Sampling Table (Scale of Sampling - Table 7)

Note: Exact values should be confirmed from IS 9763 Table 7.

For licensing and mark usage, always consult the latest BIS guidelines and ensure compliance with the BIS Act, 1986.

IS 9763 Hydraulic Pressure Test Key Points

• Test Types:

  • Cold water pressure test
  • Air pressure test (pneumatic)

• Test Objectives:

  • Check water tightness of obturators and taps
  • Ensure no leaks, bulges, or pressure drops

• Pressure & Duration:

  Component	Water Pressure (MPa)	Duration (s)	Air Pressure (MPa)	Duration (s)
  Bib tap, pillar tap, angle valve, stop valve	1.6	≥ 60	0.6 ± 0.05	≥ 20

• Test Setup:

  • Tap fully immersed in water tank
  • Apply specified pressure and maintain for the test duration
  • No leakage or pressure drop allowed

• Torque for Nominal Size 3/4 inch:

  • 2.5 N-m (Clause 2.5)

Summary Diagram of Hydraulic Pressure Test Setup

flowchart LR
    A[Water Tank] -->|Immersed Tap| B(Tap under Test)
    C[Hydraulic Pump] -->|1.6 MPa Water Pressure| B
    D[Pressure Gauge] --> B
    E[Leak Check] --> B
    B --> F[No Leak, Bulge or Pressure Drop]

Note: Follow Annex A in IS 9763 for detailed test procedure.

IS 9763: Sampling and Criteria for Conformity (Annex B)

1. Scale of Sampling (Clause B-1.3)

• Number of samples depends on lot size.
• Use Table 7 to select sample size for various tests (Annex A).

2. Criteria for Conformity (Clause B-2)

• Acceptance Number 'a' is the max allowed defective items in the sample.
• Two scales for acceptance numbers:

Summary:

• Select sample size from Table 7 based on lot size.
• Check defective count ≤ acceptance number 'a' for the relevant scale.
• If condition met, lot is conforming.

If needed, I can provide a sample Table 7 excerpt or sampling flowchart.

IS 9763: Technical Committee Composition & Sampling Specifications

1. Technical Committee Composition (Annex C)

• Chairman: Shri S. K. Chhabra (Delhi Jal Board)
• Members: Representatives from diverse organizations including:
  • Municipal Corporations (e.g., Brihanmumbai Municipal Corporation)
  • Research Institutes (CBRI Roorkee, CSIR Calcutta)
  • Industry (Bhaskar Refractories, Hindustan Sanitaryware)
  • Public Health Engineering and Water Boards
  • BIS Director General (Ex-officio)
• Member-Secretary: Shri W. R. Paul (BIS)

This multi-disciplinary committee ensures comprehensive standard formulation.

2. Sampling & Criteria for Conformity (Clause 2.2.1, Table 7)

• n: Number of samples to select randomly.
• a: Maximum acceptable defective samples.

Summary

• The committee includes experts from government, industry, and research.
• Sampling scales define test sample sizes and acceptance criteria based on lot size.
• This ensures quality control and conformity to the standard.

flowchart LR