industrial sieves, Part 1: Wire cloth sieves

IS 2405 Part 1 - Scope: Key Formulas, Tables & Specifications

Scope:
Covers industrial wire cloth and screens with specific aperture sizes and wire diameters used for sieving.

1. Aperture Sizes & Wire Diameter Combinations (Table 1)

Open area % = (Net open area after wire obstruction)

2. Tolerances for Wire Diameters (Table 3)

3. Designation Example

IS 2405 Part 1 - Key Definitions, Tables & Specifications

1. Definitions
   Refer to IS 5742 (Part I) - 1970 for standard definitions related to industrial wire cloth and sieves.

2. Designation of Industrial Sieves (Clause 1.6)
   Example: w-5-6 mm d-1.6 mm IS Industrial Sieve

   • w: aperture width (5.6 mm)
   • d: wire diameter (1.6 mm)

3. Table 1: Aperture Size and Wire Diameter Combinations
   Provides combinations of aperture widths and wire diameters for different sieve types (Heavy, Medium, Light).
   Example extract:

4. Table 3: Tolerances for Wire Diameters (Clause 6.2)

IS 2405 Part 1: Materials of Wire - Key Points

1. Material Specifications (Clause 4.1)

• Aperture size 20 µm to 224 µm:
  • Phosphor bronze, stainless steel, or monel.
• Aperture size 250 µm to 900 µm:
  • Phosphor bronze, stainless steel, monel, or brass (Cu70Zn30).

2. Wire Diameter Tolerances (Clause 6.2)

• Wire diameter tolerances must comply with Table 3 (not fully given here).
• Applies separately to warp and weft wires.

3. Wire Diameter and Aperture Size Combinations (Table 1 excerpt)

• Open area % increases as wire diameter decreases for a given aperture.

4. General Notes

• Refer IS 5742 (Part 1) for weave diagrams.
• Wire material choice depends on aperture size and application.
• Wire diameter and aperture size directly affect open area and sieve performance.

flowchart LR
    A[Aperture Size] --> B{Material Selection}
    B -->|20-224 µm| C[Phosphor Bronze / Stainless Steel / Monel]
    B -->|250-900 µm| D[Phosphor Bronze / Stainless Steel / Monel / Brass]
    A --> E[Wire Diameter & Tolerance]
    E --> F[Table 3: Wire Diameter Tolerances]
    E --> G[Table 1: Aperture & Wire Diameter Combinations]

For detailed wire tolerances and weave types, consult full IS 2405

IS 2405 Part 1: Wire Cloth Construction and Weave - Key Points

1. Wire Cloth Construction (Clause 4.1.2)

• Wire cloth must be regularly woven.
• Apertures must be uniform square openings (no rectangular apertures allowed).

2. Types of Weave (Clause 3.1)

• Common weaves for industrial wire cloth:
  • Intermediate crimp
  • Twilled weave

3. Aperture Size and Wire Diameter (Clause 5)

• Only square apertures are covered.
• Special-purpose cloths (e.g., Dutch weave, welded wire screen) are excluded.

4. Wire Diameter Tolerances (Clause 6.2)

• Tolerances for wire diameter (warp & weft separately) are specified in Table 3 (not fully reproduced here).
• Tolerances ensure uniformity in wire thickness for consistent aperture size.

Typical Wire Diameter Tolerance Table (Example format)

Summary Diagram of Wire Cloth Weave

graph LR
A[Warp Wire] -- Interlaced --> B[Weft Wire]
B -- Regular Spacing --> C[Square Aperture]
C -- Uniform Size --> D[Wire Cloth]

Note: For exact wire diameter tolerances and aperture size combinations, refer to Table 3 in IS 2405 Part 1.

IS 2405 Part 1: Aperture Size and Wire Diameter Combinations

Key Points from Clauses 4.1.2, 5.1 & Table 1:

• Wire cloth is woven to produce uniform square apertures.
• For each aperture size, 5 grades of service (Heavy, Medium Heavy, Medium, Medium Light, Light) specify wire diameters and corresponding open area %.
• Open area % = Ratio of aperture area to total area, affects flow and strength.
• Industrial sieves must use combinations from Table 1 only.
• Wire diameter tolerances per Table 3 (Clause 6.2).

Sample from Table 1 (Aperture Size vs Wire Diameter & Open Area %)

Formula for Open Area % (approximate):

[ \text{Open Area %} = \left(\frac{\text{Aperture Size}}{\text{Aperture Size} + \text{Wire Diameter}}\right)^2 \times 100 ]

Summary:

• Choose wire diameter based on duty grade for given aperture.
• Refer to Table 1 for exact wire diameter and open area %.
• Ensure wire diameter tolerances per Table 3.
• Uniform square apertures ensure sieve performance.

flowchart LR
    A[Aperture Size (mm)] --> B{Select Grade of Service

IS 2405 Part 1 - Tolerances on Aperture Widths & Wire Diameters

1. Tolerances on Aperture Widths (Clause 6.1 & Table 2)

• Permissible variations depend on the nominal aperture size.
• Aperture size ranges (in microns) and their tolerances are specified, e.g.:
  • Under 1.00 mm to 500 µm
  • Under 500 µm to 250 µm
  • ... down to Under 36 µm to 20 µm
• Exact tolerance values vary per range (refer to Table 2 in IS 2405 Part 1).

2. Tolerances on Wire Diameters (Clause 6.2 & Table 3)

• Applies separately to warp and weft wires.

Summary:

• Aperture tolerances vary by size range (see Table 2).
• Wire diameter tolerances decrease with smaller diameters (see Table 3).
• Both tolerances ensure quality and uniformity in industrial wire cloth and screens.

flowchart LR
    A[Aperture Size] -->|Check range| B{Tolerance from Table 

IS 2405 Part 1 (1980) - Surface Finish Requirements for Industrial Wire Cloth and Screens

Key Specifications & Tables:

1. Tolerances on Wire Diameter (Table 3, Clause 6.2):

2. Tolerances on Aperture Widths (Table 2, Clause 6.1):

IS 2405 Part 1 - Key Points on Marking & Designation of Industrial Sieves

1. Designation Format (Clause 9.1)

• Sieve designation = Aperture size + Wire diameter (in mm or micrometer) + "IS industrial sieve"
• Example: 1.00 mm aperture, 0.25 mm wire → "1.00/0.25 IS industrial sieve"

2. Nominal Aperture Sizes & Tolerances (Clause 6.1)

Refer to Clause 6.1 table for full range.

3. Wire Diameter Tolerances (Clause 6.2, Table 3)

Complete table covers all ranges.

4. Marking (Clause 8.1.1)

• ISI Certification Mark may be applied.
• Marks ensure compliance with ISI quality control and inspection.

flowchart TD
    A[Industrial Sieve] --> B[Designation]
    B --> C{Format}
    C --> D[Aperture Size (mm/μm)]
    C --> E[Wire Diameter (

IS 2405 Part 1 – Designation of Industrial Sieves

1. Sieve Designation (Clause 9.1)

• Format:
  "w - aperture size (mm) d - wire diameter (mm) IS Industrial Sieve"
  e.g., w-5-6 mm d-1.6 mm IS Industrial Sieve

2. Aperture Size Ranges (Clause 1.00)

• Categories:
  • Under 1.00 mm to 500 μm
  • Under 500 μm to 250 μm
  • Under 250 μm to 125 μm
  • Under 125 μm to 71 μm
  • Under 71 μm to 56 μm
  • Under 56 μm to 36 μm
  • Under 36 μm to 20 μm

3. Tolerances for Wire Diameter (Table 3, Clause 6.2)

4. Aperture Size Tolerances (Clause 6.1)

IS 2405 Part 1 — Sampling and Testing Procedures: Key Points

Sampling Procedure (Clauses 10.2, 10.2.1)

• Sampling is done per lot to check conformity.
• Number of sample rolls/sieves follows Level IV of Table 1, IS 2500 (Part I)-1973.
• Use AQL 2.5% from Table 2, IS 2500 (Part I)-1973 to decide lot acceptance/rejection.

Testing Specifications (Clause 6.1)

• Aperture sizes have defined tolerances for average and individual apertures.
• Tolerances depend on nominal aperture size as per the table below:

IS 2405 Part 1 - Testing of Industrial Wire Cloth and Screens: Key Points

1. Scope & Aperture Sizes

• Covers woven wire cloth and screens with square apertures for industrial use.
• Aperture sizes range from 125 mm down to 20 µm.
• Multiple wire diameters available for each aperture size to suit service grades.

2. Wire Diameter Tolerances (Table 3, Clause 6.2)

3. Designation of Industrial Sieves (Clause 1.00)

• Aperture size ranges specified for sieves from under 1.00 mm to 20 µm.
• Used to classify wire cloth for different filtration or separation tasks.

4. Testing & Calibration

• Methods for checking aperture size and wire diameter are included in Appendix A.
• Calibration ensures compliance with dimensional tolerances.
• Final test values are rounded per IS 2-1960 rules.

5. International Coordination

• Aligns with ISO 2194-1972 and ASTM E 437-1971 standards.
• Ensures global compatibility in wire cloth specifications.

Summary