Hexagonal Wire Netting for General Purposes

IS 3150: Scope - Key Specifications & Tables

Scope: Covers hexagonal wire netting for general purposes, specifying sizes, wire diameters, tolerances, and construction.

1. Sizes of Apertures, Wire Diameters & Widths (Table 2)

• Note: 'x' indicates permissible combinations of aperture, wire diameter, and width.

2. Tolerances on Aperture & Width (Table 3)

3. Wire Diameter & Tolerances (Table 1)

4. Sampling & Quality

• Acceptable Quality Level (AQL): 2.5% per IS 2500 (Part I) - 1973.
• Sampling based on defective rolls to determine lot conformity.

This

IS 3150 - Key Definitions, Tables & Specifications

1. Definitions (Clause 2.0)

• Defines terms used in the standard for hexagonal wire netting.
• Conformity based on AQL (Acceptable Quality Level) of 2.5% per IS 2500 (Part I).

2. Sampling Criterion (Clause 2.2)

• Sampling inspection follows IS 2500 Part I with AQL = 2.5%.
• Number of defective rolls determines lot acceptance.

3. Wire Diameters & Tolerances (Clause 4.2, Table 1)

4. Sizes of Apertures, Wire Diameters & Widths (Clause 4.1, Table 2)

• Apertures: 10mm to 100mm.
• Wire diameters vary with aperture size.
• Widths range from 300mm to 1800mm.
• "x" in table indicates permissible combinations.

5. Tolerances on Aperture & Width (Clause 4.4, Table 3)

IS 3150: Material Requirements - Key Formulas, Tables & Specifications

1. Sampling & Conformity (Clauses 1.2.1 & 2.2)

• Sampling per Level IV of Tables 1 & 2, IS 2500 (Part I)-1973.
• Acceptance Quality Level (AQL) = 2.5% defectives (Table 2, IS 2500).

2. Wire Diameters & Tolerances (Clause 4.2, Table 1)

3. Aperture Sizes, Wire Diameters & Net Widths (Clause 4.1, Table 2)

• Aperture sizes: 10 mm to 100 mm.
• Wire diameters and permissible widths vary; refer to Table 2 for combinations.
• Example: For 25 mm aperture, wire diameters 0.90 mm, 1.40 mm are common.

4. Tolerances on Aperture & Width (Clause 4.4, Table 3)

Summary Diagram: Material Specification Flow

flowchart TD
    A[Sampling: IS 2500 Level IV] --> B{Conformity Check}
    B -->|Defectives ≤ 2.5%|

IS 3150: Key Construction Specifications for Hexagonal Wire Netting

1. Wire Diameters & Tolerances (Clause 4.2, Table 1)

2. Sizes of Apertures, Wire Diameters & Widths (Clause 4.1, Table 2)

• Aperture sizes range from 10 mm to 100 mm.
• Wire diameters vary from 0.63 mm to 1.80 mm depending on aperture.
• Widths available: 300 mm to 1800 mm.
• Permissible combinations are marked (x) in Table 2 (refer IS 3150 for detailed matrix).

3. Tolerances on Aperture & Width (Clause 4.4, Table 3)

4. General Construction Notes

• Netting is hexagonally woven.
• Wire is

IS 3150 - Finish: Key Specifications & Tables

1. Wire Diameter & Tolerances (Clause 4.2, Table 1)

2. Aperture Sizes, Wire Diameter & Width Combinations (Clause 4.1, Table 2)

• Aperture sizes range from 10 mm to 100 mm.
• Wire diameters vary from 0.63 mm to 1.80 mm.
• Widths of netting vary from 300 mm to 1800 mm.
• Table 2 shows permissible combinations (marked 'x') of aperture size, wire diameter, and width.

3. Tolerances on Aperture and Width (Clause 4.4, Table 3)

Notes:

• S = Specified width.
• Amendments corrected aperture tolerances for

IS 3150: Length of Rolls - Key Specifications

Clause 8.1: Marking Requirements for Rolls

Each roll of wire netting must be clearly marked with:

• Manufacturer's name or trade-mark
• Width and length of the roll
• Size of aperture and diameter of wire

Typical Lengths of Rolls

• The standard length is not explicitly fixed in IS 3150 but generally depends on application.
• Common roll lengths range from 10 m to 30 m, depending on aperture size and wire diameter.

Related Tables (Summary)

Sampling & Quality Checks (Clause 2.1 & A-1.2.1)

• Sample rolls are inspected per IS 2500 (Part I) Level IV.
• Defective rolls are rejected if any specification fails.

Summary Diagram of Roll Info Marking

graph TD
A[Roll of Wire Netting] --> B[Manufacturer's Name/Trade-mark]
A --> C[Width & Length]
A --> D[Size of Aperture]
A --> E[Wire Diameter]

Note: Always verify roll length and width with supplier markings and IS 3150 tolerances for conformity.

IS 3150: Freedom from Defects - Key Points

• Sampling Plan:

  • Number of sample rolls per lot: As per Level IV of Tables 1 & 2, IS 2500 (Part I)-1973 (Inspection by attributes).
  • Acceptance Quality Level (AQL): 2.5% defective rolls allowed.

• Acceptance Criteria (Clause 2.2 & A-2.2):
  Based on the number of defective rolls found in the sample, use Table 2 of IS 2500 (Part I)-1973 to decide lot conformity.

• Amendments to Defect Limits (Table 3, Page 8):

  Size of Aperture	Original Defect Limit	Revised Defect Limit (Amendment 1985)
  25 mm	1 + 6	1 + 5
  31 mm	1 + 7	1 + 6

• Defective Roll Definition:
  Any sample roll failing any specification requirement is considered defective.

Summary Flow for Inspection

flowchart TD
    A[Select sample rolls as per IS 2500 Level IV] --> B[Inspect all rolls for defects]
    B --> C{Any roll defective?}
    C -- No --> D[Accept lot]
    C -- Yes --> E[Count defective rolls]
    E --> F[Check acceptance number from IS 2500 Table 2 with AQL 2.5%]
    F --> G{Defective rolls ≤ Acceptance number?}
    G -- Yes --> D
    G -- No --> H[Reject lot]

References:

• IS 2500 (Part I)-1973 Sampling Tables
• IS 3150 Clause 6.1, Clause 2.2, Amendment No.1 (1985)

IS 3150: Marking Key Specifications

1. Marking Requirements (Clause 8.1)

Each roll of hexagonal wire netting shall be clearly marked with:

• Manufacturer's name or trade-mark
• Width and length of the roll
• Size of aperture and diameter of wire

2. Wire Diameter & Tolerances (Table 1, Clause 4.2)

3. Aperture Sizes, Wire Diameters & Widths (Table 2, Clause 4.1)

• Aperture sizes range from 10 mm to 100 mm.
• Wire diameters vary from 0.63 mm to 1.80 mm.
• Widths available from 300 mm to 1800 mm.
• Permissible combinations are indicated by 'x' in the table (refer to IS 3150 Table 2).

4. Tolerances on Aperture and Width (Table 3)

IS 3150: Packing of Hexagonal Wire Netting - Key Points

Packing (Clause 9.1)

• Each roll must be suitably packed to prevent damage during transit.
• The packing method is mutually agreed between manufacturer and user.
• No fixed packing formula; focus on protection and user requirements.

Sizes, Wire Diameters & Widths (Clause 4.1 - Table 2)

Note: "x" indicates permissible combinations.

Tolerances on Aperture & Width (Table 3)

IS 3150: Sampling & Criteria for Conformity

1. Sampling of Rolls (Clause 1.2.1 & A-1.2.1)

• Number of sample rolls from a lot is per Level IV of Tables 1 & 2, IS 2500 (Part I)-1973.
• Sampling is by attributes and count of defects.

2. Criteria for Conformity (Clause 10.1 & A-2.2)

• Conformity decided based on AQL (Acceptable Quality Level) = 2.5%.
• Use Table 2 of IS 2500 (Part I)-1973 for acceptance/rejection criteria depending on defective samples.

3. Lot-wise Sampling (Clause A-1.2)

• Each lot is inspected separately.
• Sample size depends on lot size (refer IS 2500 tables).

Key Table Reference: IS 2500 (Part I) - Sampling by Attributes

(Exact values must be taken from IS 2500 Part I Table 2)

Amendment Highlights (June 1985)

• Aperture 25 mm: Acceptance changed from 1+6 to 1+5.
• Aperture 31 mm: Acceptance changed from 1+7 to 1+6.

flowchart TD
    A[Lot Received] --> B[Determine Lot Size]
    B --> C[Select Sample Size (IS 2500 Level IV)]
    C --> D[Inspect Sample Rolls]
    D --> E{Defective Rolls ≤ Acceptance Number?}
    E -- Yes --> F[Lot Accepted]
    E -- No --> G[Lot Rejected]

Summary: Use IS 2500 Part I tables for sample size & acceptance numbers at AQL 2.5%. Inspect each lot separately. Apply amendment corrections for aperture sizes as specified.

IS 3150 Sampling & Criteria for Conformity: Key Points

1. Sampling Procedure (Clause 1.2.1, A-1.2.1)

• Number of sample rolls per lot is per Level IV of Tables 1 & 2, IS 2500 (Part I) - 1973.
• Sampling is by attributes and defect counts.

2. Criteria for Conformity (Clause 10.1, Appendix A)

• Sampling method and acceptance criteria follow AQL = 2.5% (Acceptable Quality Level).
• Defect limits per lot are based on Table 2, IS 2500 (Part I) - 1973.
• Lot conformity is determined by the number of defective rolls found in the sample.

3. Amendment Highlights (June 1985)

• For aperture size 25 mm: Replace acceptance numbers from 1+6 to 1+5.
• For aperture size 31 mm: Replace acceptance numbers from 1+7 to 1+6.

Summary Table Example (from IS 2500 Part I, Level IV, AQL 2.5%)

Note: Use exact IS 2500 tables for precise values.

flowchart TD
    A[Start: Lot of Netting Rolls] --> B[Determine Lot Size]
    B --> C[Select Sample Size (IS 2500 Level IV)]
    C --> D[Inspect Sample Rolls for Defects]
    D --> E{Defects ≤ Acceptance Number?}
    E -- Yes --> F[Lot Accepted]
    E -- No --> G[Lot Rejected]

References:

• IS 3150:1982, Clause 1.2.1, 10.1, Appendix A
• IS 2500 (Part I)