forged brass gate, globe and check valves for water works purposes

IS 13114 - Scope: Key Specifications and Tables

1. Scope Overview:

IS 13114 specifies dimensions, material tests, and marking for valves (gate, globe, check valves) used in piping systems.

2. Key Tables:

Table 2: Wall Thickness & Dimensions (Clause 7.1 & 8.8)

Table 3: End-to-End Dimensions (Clause 7.2)

IS 13114 Key References:

1. Material Tests (Clause 9.2)

• Material tests must comply with corresponding material specifications (see Table 1 in the standard).
• Suppliers must certify material compliance.

2. End-to-End Dimensions (Clause 7.2, Table 3)

Note: Sizes not listed are generally not manufactured for those valve types.

3. Wall Thickness and Other Dimensions (Clauses 7.1 & 8.8, Table 2)

IS 13114 - Key Definitions & Specifications Summary

1. Definitions (Clause 3.1 & 3.2):

   • Definitions refer to IS 4854 (Part 1): 1969 and IS 9520:1980 for nominal sizes.
   • Nominal Size is as per IS 9520:1980, which standardizes pipe and fitting sizes.

2. Material Tests (Clause 9.2):

   • Material tests must comply with the relevant material specifications listed in Table 1 of IS 13114.
   • Suppliers must certify materials conform to these specifications.

3. Wall Thickness & Dimensions (Table 7.1.2, Clause 7.1 & 8.8):

This table is critical for design and quality control of components covered under IS 13114.

If you need further details on material specs or formulas, please specify.

IS 13114: Nominal Sizes Key Data

1. Nominal Size Definition

• As per IS 9520:1980, nominal size refers to the approximate internal diameter of valves or pipes.

2. Minimum Flow-Way Area (Clause 8.1.1, Table 4)

3. Wall Thickness & Dimensions (Clause 7.1, Table 2)

IS 13114 - Key Materials Specifications & Dimensions

1. Material Specifications (Clause 5.1 & 9.2)

Note: Handwheels may also be steel, aluminium alloy, zinc alloy, or non-metallic.

2. Dimensional Requirements (Clause 7.1, Table 2)

IS 13114: Key Specifications for Types and Design of Valves

Types of Valves (Clauses 6.2 - 6.4)

• Gate Valves (6.2):

  • Inside screw type, non-rising stem.
  • Solid wedge gate, one-piece.
  • Screwed-in bonnet, integral seats.
  • Scooping allowed but thickness ≥ minimum wall thickness (see Table 2).

• Check Valves (6.4):

  • Swing Type: Axis aligned with body ends; vertical use only with upward flow.
  • Lift Type: Disc or ball check; body can be straight (horizontal) or vertical lift.
  • Must have screwed-in covers and integral seats.

End-to-End Dimensions (Clause 7.2, Table 3)

Note: Sizes not listed are generally not manufactured for that valve type.

Design Notes:

• Valves must have screwed female ends.
• Gate valve gate thickness after scooping ≥ minimum body wall thickness (Table 2).
• Check valves must have integral seats and screwed-in covers.

Summary Diagram: Valve Types and Flow Directions

IS 13114: Dimensions and Tolerances Summary

Key Specifications (Clause 7.1 & Table 2)

Tolerances (Clause 7.2.1)

• End-to-end dimension tolerance: ±1.5 mm

Notes

• Wall thickness, stem diameter, sealing face dimensions, and thread lengths must meet the above minimums.
• End-to-end dimensions must conform to values in Table 3 (not provided here).

flowchart LR
    A[Valve Nominal Size] --> B[Check Wall Thickness]
    B --> C{Meets Min. Thickness?}
    C -->|Yes| D[Check Stem Diameter]
    C -->|No| E[Reject or Rework]
    D --> F{Meets Min. Stem Diameter?}
    F -->|Yes| G[Check Sealing Face OD]
    F -->|No| E
    G --> H{Meets Min. OD?}
    H -->|Yes| I[Check Thread Length]
    H -->

IS 13114: Design and Manufacture Key Points

1. Dimensional Tolerance

• End-to-end dimension tolerance: ±1.5 mm (Clause 7.2.1)

2. Material Tests

• Material must comply with specifications in Table 1 (Clause 9.2).
• Supplier certification required for material compliance.

3. Critical Dimensions (Clause 7.1 & Table 2)

Summary

• Follow Table 2 for minimum wall thickness, stem diameter, sealing face dimensions, and thread lengths.
• Ensure material testing and certification as per Clause 9.2 for quality assurance.

flowchart TD
    A[Design & Manufacture] --> B[Dimensional Tolerance ±1.5mm]
    A --> C[Material Tests per Table 1]
    A --> D[Dimensional Specs from Table 2]
    D --> E[Wall Thickness]
    D --> F[Stem Diameter]
    D --> G[Sealing Face OD

IS 13114: Key Formulas, Tables & Specifications for Testing

1. Material Tests (Clause 9.2)

• Material tests must comply with the corresponding material specifications in Table 1.
• Suppliers must provide certification confirming compliance.

2. Hydrostatic Testing (Clause 9.3 & 9.3.2)

• Hydrostatic test pressure ( P ) is calculated as:

[ P = 1.5 \times P_{design} ]

where ( P_{design} ) = design pressure of the valve or component.

• This pressure ensures the valve body integrity under pressure.

3. Sampling & Test Quantities (Clause 2.2)

• Sub-sample size for body, seat, and backseat tests is as per Column 4 of Table 5.
• Sub-samples are taken from valves already tested satisfactorily in preliminary tests (Clause B-2.1).

Summary Table (Example Format)

flowchart LR
    A[Material Certification] --> B[Preliminary Testing]
    B --> C[Sampling per Table 5]
    C --> D[Hydrostatic Test @ 1.5× Design Pressure]
    C --> E[Body, Seat & Backseat Tests]
    D & E --> F[Acceptance or Rejection]

Note: Refer to IS 13114 Table 1 & Table 5 for detailed material specs and sample sizes.

IS 13114: Inspection and Test Certificates - Key Points

1. Material Tests (Clause 9.2)

• Tests as per material specifications in Table 1.
• Supplier must provide Material Test Certificates confirming compliance.

2. Manufacturer's Test Certificate (Clause 10.1.2)

• If purchaser does not inspect, manufacturer must issue a Test Certificate confirming valve conformity to IS 13114.

3. Sampling & Conformity (Clause 13.2 & Annex B)

• Sampling per Table 12 and Annex B (B-1, B-2.2.1).
• Lot accepted if no failures in sub-sample tests.
• Valves may bear the Standard Mark indicating BIS certification.

4. Relevant IS Standards for Reference (Annex A)

• IS 210 (Grey iron castings)
• IS 319 (Free cutting brass)
• IS 554 (Pipe thread dimensions)
• IS 4905, 5414, 6912 (Sampling, packing, forging)
• IS 4218 (Screw threads)
• IS 4687 (Gland packing asbestos)
• IS 7608 (Phosphor bronze wires)

Summary Table: Test Certificates & Sampling

flowchart TD
    A[Material Procurement] --> B[Material Test Certificate]
    B --> C[Manufacturing]
    C --> D{Inspection by Purchaser?}
    D -- Yes --> E[Inspection & Testing]
    D -- No --> F[Manufacturer Test Certificate]
    E --> G[Sampling per Table 12]
    F --> G
    G --> H{All tests passed?}
    H -- Yes --> I[Standard Mark & Dispatch]
    H -- No --> J[Reject Lot]

Note: Always refer to the latest edition of IS 131

IS 13114: Packing and Delivery Key Points

Packing & Delivery Specifications (Clause 11.3)

• Body ends must be sealed to prevent ingress of foreign matter during storage and transportation.
• Sealing ensures product integrity until installation.

Relevant Dimensions (Table 7.1.2)

Dimensional Tolerances (Clause 7.2.1)

• End-to-end length tolerance: ±1.5 mm

Summary:

• Seal ends properly during packing to exclude contaminants.
• Follow minimum dimension specs for wall thickness, stem diameter, sealing face, and thread length.
• Maintain dimensional tolerances during manufacture and delivery.

flowchart LR
    A[Manufacture] --> B[Sealing of Body Ends]
    B --> C[Storage]
    C --> D[Transportation]
    D --> E[Delivery to Purchaser]
    style B fill:#f9f,stroke:#333,stroke-width:2px

IS 13114: Sampling and Criteria for Conformity

Key Points from Annex B & Clause 12.1

• Sampling is done lot-wise; each lot tested separately.
• The sample size, acceptance number, and sub-sample size depend on the lot size.
• Acceptance criteria are zero or limited defective valves allowed per sample.

Table: Sampling Scale & Criteria for Conformity (Clause 2.1.4)

Procedure:

1. Select sample size from the lot.
2. Test the sample.
3. Accept the lot if defective valves ≤ acceptance number.
4. Use sub-samples for detailed tests if required.

Additional Notes:

• Valves may be marked with the Standard Mark after conformity.
• Refer to Annex A for related IS standards (e.g., IS 4905 for sampling methods).

flowchart TD
    A[Lot of Valves] --> B[Select Sample Size]
    B --> C{Defective Valves ≤ Acceptance Number?}
    C -- Yes --> D[Accept Lot]
    C -- No --> E[Reject Lot]
    B --> F[Sub-sample Testing (if needed)]

This ensures quality control per IS 13114 standards.

IS 13114: Marking - Key Points & Specifications

• Standard Mark Usage:
  The Standard Mark signifies compliance with IS 13114 under BIS supervision, ensuring quality control and continuous conformity checks.

• Marking Clause (13.2):
  Each valve may be marked with the Standard Mark to indicate conformity.

• Relevant Tables for Dimensions (Clause 7.1, Table 2):

  Nominal Size (mm)	Min. Wall Thickness (mm)	Min. Stem Diameter (mm)	Min. Across Flat/OD of Face at Ends (mm)	Min. Length of Threads at Ends (mm)
  8	1.6	5.5	18	7.0
  10	1.7	6.0	22	7.5
  15	1.8	6.5	26	9.5
  20	2.0	7.5	32	10.5
  25	2.1	8.5	39	12.0
  32	2.4	9.5	49	13.5
  40	2.5	10.5	55	13.5
  50	2.8	12.0	68	17.0

• Quality Assurance:
  Marking is part of a well-defined inspection, testing, and quality control system managed by BIS.

• Material Certification:
  Material tests per relevant specifications (Clause 9.2) must be certified by suppliers.

Summary Diagram: Marking Compliance Flow

flowchart TD
    A[Manufacturer Produces Valve] --> B[Testing & Inspection]
    B --> C{Conforms to IS 13114?}
    C -- Yes --> D[Mark Valve with Standard Mark]
   

IS 13114 - List of Referenced Indian Standards (Annex A, Clause 2)

This standard references key IS codes necessary for valve manufacturing and testing:

Additional Notes:

• These standards ensure material quality, dimensions, thread specifications, sampling methods, and terminology for valves.
• Refer to these IS codes for detailed design profiles, tolerances, and testing procedures.
• The Standard Mark indicates compliance and quality assurance under BIS supervision.

graph LR
A[IS 13114] --> B[Material Standards (IS 210, 319)]
A --> C[Thread Standards (IS 554, 4218, 7008)]
A -->

IS 13114: Sampling and Criteria for Conformity

Key Points from Annex B & Clause 12.1

• Sampling is done per lot to verify conformity.
• Each lot is tested separately.

Table: Scale of Sampling and Criteria for Conformity (Clause 2.1.4, Table B-1.1)

• Acceptance Number (c): Maximum number of defective valves allowed in the sample for the lot to be accepted.
• Sub-sample Size: Number of valves tested for specific tests within the sample.

Procedure Summary

• Draw the specified sample size from the lot.
• Test the sub-sample as per requirements.
• If number of defective valves ≤ acceptance number, lot is accepted.
• Otherwise, lot is rejected.

Additional Notes

• Each valve may be marked with the Standard Mark after acceptance (Clause 13.2).
• Refer to Annex A for related IS standards on materials, threads, and testing methods.

flowchart TD
    A[Lot of Valves] --> B[Select Sample Size (n)]
    B --> C[Test Sub-sample]
    C --> D{Defects ≤ Acceptance Number?}
    D -- Yes --> E[Accept Lot & Mark Valves]
    D -- No --> F[Reject Lot]

This method ensures quality control by statistically verifying valve conformity per IS 13114.