basket strainers for fire fighting purposes (cylindrical type)
1984 Edition

Overview of IS 3582 Scope:

• Objective: Defines the dimensions, fabrication, and marking of cylindrical basket strainers used in fire fighting water fittings.
• Terminology: Clause 2.0 establishes definitions pertinent to basket strainers.
• Dimensional Data: (Clause 5.1, Table 1) Details sizes and key diameters (A, B, C, D, E, F) in millimeters:

• Cord Lengths: (Clause 6.3)

• Marking Details: (Clause 7.1.1) Basket strainers may display the ISI Certification Mark, confirming adherence to ISI quality standards.

Note: All measurements are expressed in millimeters. This standard guarantees compatibility and quality assurance for firefighting water system fittings.

Terminology & Important Specifications in IS 3582

1. Definitions (Clause 2.0)

• Clarifies terminology related to basket strainers to ensure consistent interpretation across design, marking, and dimensioning.

2. Basket Strainer Dimensions (Clause 5.1 & Table 1)

• All dimensions are in millimeters.
• Refer to Fig. 1 for the general configuration and assembly.

3. Marking Specifications (Clause 7.1.1)

• Basket strainers may carry the ISI Certification Mark, signifying compliance with Indian Standards enforced through ISI oversight.

4. Measurement Units

• Pressure and stress: Pascal (Pa) = 1 N/m²
• Force: Newton (N) = 1 kg·m/s²
• Energy: Joule (J) = 1 N·m
• Power: Watt (W) = 1 J/s

Diagrammatic Summary of Basket Strainer Dimensions

flowchart LR
    A[Size] -->|175-240 mm| B(A Diameter)
    A -->|130-200 mm| C(B Diameter)
    A -->|290-490 mm| D(C Diameter)
    A -->|185-265 mm| E(D Diameter)
    A -->|200-280 mm| F(E Diameter)
    A -->|195-265 mm| G(F Diameter)

Use Table 1 and Fig. 1 for precise construction and fitting details.

IS 3582: Material Requirements and Relevant Tables

1. Basket Strainer Dimensions (Clause 5.1, Table 1)

• Dimensions are in millimeters, aligned with Fig. 1 (assembly schematic).

2. Cord Lengths (Clause 6.3, Table 6)

• Cords A and B are threaded through eyelets to assemble the basket.

3. Materials and Markings (Clause 7.1.1)

• Basket strainers should bear the ISI Certification Mark, certifying conformity with IS 3582.
• Typical materials include cotton canvas for the sleeve and aluminium or aluminium alloys for cast components according to their respective IS standards.

Summary:

• Sizes 75 to 140 mm have standardized dimensions and cord lengths.
• Materials include cotton canvas sleeves and aluminium alloys for durability.
• ISI marking ensures quality and regulatory compliance.

flowchart LR
    A[Basket Strainer] --> B[Canvas Sleeve]
    A --> C[Aluminium Alloy Casting]
    B --> D[Threaded Cord A & Cord B]
    D --> E[Lengths per Table 6.3]
    C --> F[Dimensions as per Table 5.1]

IS 3582: Basket Strainers - Size Options and Measurements

Sizes Offered (Clause 4.1)

• Standard sizes available: 75 mm, 100 mm, 125 mm, and 140 mm

Dimensional Data (Clause 5.1, Table 1)

• The diameters A through F relate to different parts of the strainer and sleeve, per Fig. 1.

Cord Lengths (Clause 6.3)

Additional Notes:

• The overall shape and dimensions correspond to Fig. 1 illustrating basket assembly.
• Cords A and B are threaded through equidistant eyelets at sleeve ends.
• Eyelets are evenly spaced and secured with stitching as detailed in Fig. 1.

flowchart TB
    Size[Basket Strainer Size] --> Dimensions{Key Dimensions}
    Dimensions --> A_B_F[Diameters A, B, C, D, E, F]
    Size --> Cords{Cord Lengths}
    Cords --> Cord_A_B[Lengths of Cord A and Cord B]
    A_B_F --> Assembly[Assembly per Fig. 1]
    Cord_A_B --> Assembly

This section consolidates all critical size information for basket strainers under IS 3582.

IS 3582: Basket Strainer - Shape and Size Specifications

1. Shape Description

• The basket strainers conform to the design depicted in Fig. 1, featuring a cotton canvas sleeve, eyelets, and securing cords.
• Sleeve ends are finished with hems containing equally spaced eyelets.
• Two cords (designated A and B) are threaded through these eyelets securing the assembly.

2. Sizes Available

• Strainer diameters offered include 75 mm, 100 mm, 125 mm, and 140 mm.

3. Important Dimensions (Table 1, all values in millimeters)

4. Cord Lengths (Clause 6.3)

Overview:

• Refer to Table 1 for dimensional data.
• Consult Table 6.3 for cord length specifics.
• Fig. 1 provides assembly and shape details including canvas sleeve and eyelet stitching.

flowchart LR
    BasketStrainer --> CanvasSleeve
    BasketStrainer --> Eyelets[Equally spaced eyelets]
    BasketStrainer --> CordA[Threaded Cord A]
    BasketStrainer --> CordB[Threaded Cord B]

Ensures compliance with IS 3582 dimensional and assembly requirements.

IS 3582 - Construction Specifications for Basket Strainers

1. Dimensional Data (Clause 5.1, Table 1)

• These dimensions define the general form of the basket strainer shown in Fig. 1.

2. Cord Lengths (Clause 6.3)

• Cord A and Cord B are passed through eyelets on the basket ends, which are spaced uniformly.

3. Construction Notes

• The basket employs cotton canvas sleeves with hemmed edges.
• Eyelets are stitched to secure the cords firmly.
• The construction ensures proper fitting and functionality.

Assembly Visualization

graph LR
    CordA -->|Threaded through eyelets| Basket
    CordB -->|Threaded through eyelets| Basket
    Basket --> CanvasSleeve
    CanvasSleeve --> HemmedEnds

Summary: Utilize Table 1 for dimensions, Table 6.3 for cord lengths, and Figure 1 for assembly instructions including eyelet spacing and canvas sleeve construction to comply with IS 3582.

IS 3582 - Marking Requirements for Basket Strainers

Clause 7.1 - Mandatory Identification

Each basket strainer must be permanently and clearly marked with:

• Manufacturer’s name or trademark
• Nominal basket strainer size
• Year of production

Clause 7.1.1 - Optional ISI Mark

• Basket strainers may bear the ISI Certification Mark, indicating conformity to IS quality and inspection standards.
• The use of the ISI mark is regulated under the Indian Standards Institution (Certification Marks) Act.

Marking Summary Table

Additional Information

• Markings must be durable and legible.
• The ISI mark ensures continuous quality surveillance.

flowchart TD
    BasketStrainer --> Marking
    Marking --> ManufacturerTrademark
    Marking --> Size
    Marking --> ManufactureYear
    Marking --> ISIMark{Optional}
    ISIMark --> ISICertification

This marking ensures traceability and quality assurance as per IS 3582.

Inspection and Testing Requirements in IS 3582

Compliance with IS 3582 entails rigorous inspection and testing to confirm the quality and performance of basket strainers used in firefighting.

Key Inspection Points:

• Marking Verification: Basket strainers may include the ISI Certification Mark, verifying adherence to IS standards under ISI supervision (Clause 7.1.1).

• Dimensional Checks: Visual and measurement inspections to verify dimensions against Table 1 (Clause 5.1).

• Pressure and Leak Tests: Ensure no leakage or deformation under rated working pressure multiplied by safety factors.

• Material Testing: Verify mechanical and chemical properties to confirm material quality.

• Functional Testing: Assess flow characteristics and filtration effectiveness.

Important Dimensions (Table 1)

Cord Lengths (Clause 6.3)

Typical Pressure Test Formula:

[ P = \text{Rated Working Pressure} \times \text{Safety Factor} ]

• Safety factor generally ranges from 1.5 to 2.0.
• Confirm absence of leaks or deformation during testing.

Summary

• ISI Mark usage assures quality compliance.
• Verify all dimensions and construction details per the standard.