wire cloth for general purposes

IS 1568: Scope - Key Specifications & Tables

Scope:
IS 1568 covers wire cloth specifications including aperture size, wire diameter, permissible variations, and quality control measures.

Key Tables from IS 1568:

1. Minimum Number of Apertures to be Measured (Clause 1.1)

2. Wire Cloth Dimensions & Tolerances (Clause 1.2)

IS 1568: Key Definitions & Specifications

Clause 2.0: Definitions

• Defines terms related to wire cloth used in construction and testing.

Key Tables from IS 1568:

1. Minimum Number of Apertures to be Measured (Clause 1.1)

2. Wire Cloth Dimensions & Permissible Variations (Clause 1.2)

IS 1568: Material and Construction Key Points

1. Wire Cloth Dimensions (Clause 5.1 & Table 1)

• Dimensions must comply with Table 1 specifying:
  • Average aperture width
  • Maximum permissible variation in average aperture size (%)
  • Maximum permissible variation in individual aperture size (%)
  • Nominal wire diameter (mm)

2. Measurement of Apertures (Clause A-1.1 & Table 2)

• Number of fields and minimum consecutive apertures to be measured depends on aperture size:

3. Construction Specifications

• Wire diameter and aperture tolerances ensure uniformity and quality.
• Wire cloth must be free from defects and conform to specified mechanical properties.

flowchart TD
    A[Select Nominal Aperture] --> B[Check Table 1 for Wire Diameter & Tolerances]
    B --> C[Measure Apertures According to Table 2]
    C --> D{Are Measurements Within Tolerances?}
    D -- Yes --> E[Approve Wire Cloth]
    D

IS 1568: Dimensions and Tolerances for Wire Cloth

Key Specifications (Clause 5.1, 5.2.2.1 & Table 1)

• Dimensions: Wire cloth dimensions must conform to nominal aperture sizes and wire diameters as per Table 1.
• Tolerance on Average Aperture: The average width of all measured apertures must not deviate beyond specified limits.
• Tolerance on Individual Apertures: Individual apertures have wider permissible variation than average aperture.

Table 1 Summary (Excerpt)

Notes:

• Apertures are measured as the clear space between wires.
• Wire diameters vary as per aperture size to maintain structural integrity.
• Crimping (Clause 4.2) is allowed to reduce distortion.

Formula for Tolerance Check

[ \text{Measured Average Aperture} \in \left[ \text{Nominal Aperture} \times (1 - \frac{\text{Tolerance %}}{100}),\ \text{Nominal Aperture} \times (1 + \frac{\text{Tolerance %}}{100}) \right] ]

flowchart LR
    A[Nominal Aperture Size] --> B[Measure Multiple Apertures]
    B --> C[Calculate Average Aperture]
    C --> D{Is Average within ± Tolerance?}
    D -- Yes --> E[Accept Wire Cloth]
    D -- No --> F[Reject or Rework]

Summary: Use Table 1 for nominal sizes and tolerances; ensure average

IS 1568: Sampling and Inspection for Wire Cloth

Key Specifications & Sampling Procedure (Clause 7.1)

• Sampling frequency: 1 roll sampled from every 5 rolls delivered.
• Sample size: Minimum length of 600 mm across the entire width.

Inspection: Aperture Measurement (Clause 1.1, Table A-2)

Method of Examination (Clause 5.2.2.1, Appendix A)

• Aperture width is measured by counting consecutive apertures in each direction across sampled fields.
• Minimum number of apertures ensures statistically reliable measurement.

Summary Diagram: Sampling & Measurement Flow

flowchart TD
    A[Receive Wire Cloth Rolls] --> B{Every 5 Rolls?}
    B -- Yes --> C[Cut 600 mm Sample]
    C --> D[Measure

IS 1568: Designation and Marking for Wire Cloth

Key Specifications (Clauses 10.1 & 10.2)

• Marking on each package must include:
  • Wire cloth designation (see Clause 6)
  • Width and length of the cloth
  • Manufacturer's name or trademark
• Optional: Standard Mark may also be applied to the product (Clause 10.2).

Wire Diameter & Aperture Measurement (Clause 1.1 & Table A-2)

Summary

• Designation includes wire diameter, aperture size, and cloth type.
• Marking ensures traceability and compliance.
• Measurement follows minimum counts for aperture verification to ensure quality.

flowchart TD
    A[Wire Cloth Package] --> B[Marking]
    B --> C[Designation]

IS 1568 - Packaging Specifications for Wire Cloth

Key Packaging Clauses:

• Clause 9.1:
  Wire cloth must be wrapped in kraft paper before packing, ensuring protection during transport and storage.

• Clause 10.1:
  Each package shall be clearly marked with:

  • Wire cloth designation (refer Clause 6)
  • Width and length of the cloth
  • Manufacturer’s name or trademark

Tolerance on Aperture (Clause 5.2.2.1 & Table 1):

• The average aperture width shall not deviate beyond specified tolerances from the nominal aperture.
• Measurement method detailed in Appendix A.

(Note: Table values are indicative; refer to actual IS 1568 Table 1 for exact values)

Summary Diagram: Packaging Process

flowchart LR
    A[Wire Cloth] --> B[Wrap in Kraft Paper]
    B --> C[Pack as per Purchaser's Requirement]
    C --> D[Mark Package with Designation, Size, Manufacturer]

Ensure compliance with packaging and marking for traceability and quality assurance.

IS 1568 Acceptance Criteria for Wire Cloth Aperture

1. Tolerance on Average Aperture (Clause 5.2.2.1)

• The average width of all measured apertures must not deviate from the nominal aperture by more than the tolerances specified in Table 1 (not provided here).

2. Number of Apertures to be Measured (Clause 1.1 & Table 2)

• Measurements must be taken in 10 or 15 fields (depending on aperture size) such that no two fields are crossed by the same wire.
• Use masks as per Fig. 1 to define measurement fields.

3. Measurement Procedure

• Measure consecutive apertures in both directions.
• Calculate the average aperture width and compare with nominal aperture using tolerance limits.

IS 1568: Test Methods for Wire Cloth

Key Specifications & Tables

1. Number of Apertures to be Measured (Table 2)

• Measure apertures in both warp and weft directions.
• Minimum number varies with aperture size to ensure statistical accuracy.

2. Maximum Permissible Variation in Aperture Size (Table 1)

IS 1568 - Use of Standard Mark (Clause 10.2 & 10.2.1)

• The Standard Mark usage is governed by the Bureau of Indian Standards Act, 1986.
• License for use is granted by BIS under specified conditions.
• Manufacturers must comply with BIS rules and obtain permission for the Standard Mark.

Key Table: Number of Apertures to be Measured (Clause A-1.1)

Summary:

• The Standard Mark certifies product conformity.
• Aperture measurement ensures quality control of wire cloth.
• Follow BIS licensing for legal use of the Standard Mark.

For detailed licensing conditions, contact BIS directly.