Double Acting Spring Hinges -Specification

IS 453: Scope - Key Specifications & Sampling

• Scope: Covers spring hinges, their material, manufacture, and testing.
• Sampling & Conformity (Clause 2.1): Sampling depends on lot size with acceptance criteria as per Table 1:

• Rounding Off (Clause 12.1): Test results rounded as per IS 2:1960, retaining significant figures equal to the specified value.

• Referenced Standards: Includes IS 280 (mild steel wire), IS 4454 (steel wires for springs), IS 292 (leaded brass), IS 319 (free cutting brass), IS 410 (cold rolled brass), IS 4905 & IS 7608 (sampling methods).

This ensures quality control and material compliance for spring hinges under IS 453.

IS 453: Referenced Indian Standards Summary

Clause 2.1 and Annex A list essential Indian Standards referenced in IS 453 for materials and testing:

Key Points:

• These standards cover material specifications for steel, brass, and phosphor bronze wires used in manufacturing spring hinges.
• Sampling and conformity criteria are governed by IS 4905 and IS 7608.
• Manufacturers must provide certificates of compliance per these standards (Clause 4.1).
• The Bureau of Indian Standards (BIS) oversees quality through licensing, inspection, and continuous monitoring.

Usage:

• Always refer to these IS codes for material quality, testing methods, and acceptance criteria when designing or manufacturing spring hinges as per IS 453.

flowchart LR
    A[IS 453] --> B[Material Specs]
    B --> IS280[Mild Steel Wire IS 280]
    B --> IS292[Leaded Brass IS 292]
    B --> IS319[Free Cutting Brass IS 319]
    B --> IS410[Cold Rolled Brass IS 410]
    B --> IS4454[Steel Wires for Springs IS 4454]
    A --> C[Sampling & Testing]
    C --> IS4905[Random Sampling IS 4905]
    C --> IS7608[Phosphor Bronze Wire IS 7608]
    A --> D[Manufacturer Certification]
    D --> BIS[Bureau of Indian Standards]

For detailed material properties and sampling procedures, consult the respective IS documents.

IS 453: Double-Acting Spring Hinges - Key Specifications

Types (Clause 3.1)

• Mild Steel Double-Acting Spring Hinges
• Brass Double-Acting Spring Hinges

Sizes (Clause 5.1)

Dimensions (Clause 6.1 & Fig. 1 & 2)

• Leading dimensions must conform to IS 453 Fig. 1 & 2.
• Typical design includes:
  • Countersunk holes for wood screws No. 10.
  • Fork fitted to flap by removable pin.
  • Section YY for spring hinge.
  • Section ZZ for blank hinge.

Additional Notes

• Thickness and other detailed dimensions follow the figures.
• Material choice influences corrosion resistance and strength.

flowchart LR
  A[Double-Acting Spring Hinges] --> B[Mild Steel]
  A --> C[Brass]
  B & C --> D[Sizes: 100, 125, 150 mm]
  D --> E[Corresponding Blank Hinges: 70, 75 mm]
  E --> F[Design per Fig. 1 & 2]

For detailed dimensioning, refer directly to IS 453 Fig. 1 & 2.

IS 453: Material Requirements - Key Formulas, Tables & Specs

1. Material Standards Referenced (Annex A, Clause 2.1)

• Mild Steel Wire: IS 280:1978 (3rd revision)
• Steel Wires for Springs: IS 4454 (Part 1):1981
• Brass Ingots & Castings: IS 292:1983
• Free Cutting Brass Bars/Rods: IS 319:1989
• Cold Rolled Brass Sheet: IS 410:1977

2. Sampling and Acceptance Criteria (Clause 2.1, Table 1)

• Sampling ensures quality by limiting defective hinges per lot size.

3. Brass Hinges Dimensions (Clause 1.60, Table 7.2)

• Cylindrical casing: Brass sheet or solid brass tube, minimum 1.60 mm thick.
• Forks: Mild steel or rolled brass, brazed and machined for fit.
• Caps & Connecting Pieces: Cast brass, brazed to casing ends.

Summary

• Use IS 280 & IS 4454 for wire specs.
• Follow sampling sizes for quality control.
• Brass hinge thickness varies by size; casing minimum thickness is 1.60 mm.
• Rounding off test results per **IS

IS 453: Sizes and Dimensions for Double-Acting Spring Hinges

1. Sizes of Hinges (Clause 5.1)

2. Leading Dimensions (Clause 6.1)

• Must conform to Fig. 1 and Fig. 2 of IS 453 (typically include length, width, pin diameter, flap dimensions).

3. Brass Hinges Thickness (Clause 1.60)

• Casing thickness: ≥ 1.60 mm (brass sheet or solid drawn brass tube).
• Forks: mild steel or rolled brass, brazed to caps.
• Flaps: cast or extruded brass.

4. Sampling Criteria for Quality Control (Clause 2.1)

flowchart LR
    A[Spring Hinge Size] --> B[Blank Hinge Size]
    B --> C[Brass Flap Thickness]
    C --> D[Quality Sampling]

Summary: Use sizes 100, 125, 150 mm; brass flap thickness varies by size and type; follow Fig. 1 & 2 for dimensions; quality sampling per lot size.

IS 453: Design and Construction - Key Points

1. Material Compliance

• Manufacturer must provide a certificate of compliance with relevant Indian Standards (e.g., IS 280, IS 292, IS 319).
• Materials include mild steel wire, brass ingots, phosphor bronze wire, etc.

2. Sampling and Criterion for Conformity (Clause 4.1, Table 1)

• Lot conformity is based on the maximum allowable number of defective spring hinges in a sample.
• If defects exceed the limit in Table 1, the lot is rejected.

3. Design Considerations

• Hinges must be designed for double acting spring action ensuring smooth operation.
• Use materials conforming to specified IS codes for durability and strength.
• Follow prescribed quality control and testing procedures per IS 453.

4. Referenced IS Standards

Summary Table: Criterion for Conformity (Sample Example)

(Exact values from Table 1 in IS 453)

flowchart LR
    A[Raw Materials] --> B[Manufacturing]
    B --> C[Quality Inspection]
    C -->|Defects <= Allowed| D[Lot Accepted]
    C -->|Defects > Allowed| E[Lot Rejected]
    D --> F[Certification & Marking]

Note: For detailed design formulas, refer to specific IS codes for material properties and spring design (e.g., IS 4454 for spring wire).

IS 453: Manufacturing Requirements - Key Formulas, Tables & Specs

1. Sampling and Conformity (Clause 2.1)

• Sample size and permissible defects depend on lot size (Table 1):

2. Material Specifications (Clause 1.60)

• Cylindrical casing: Brass sheet or solid drawn brass tube, thickness ≥ 1.60 mm.
• Caps: Cast brass, machined for forks.
• Forks: Mild steel or rolled brass, forged & turned.
• Connecting piece: Cast brass, brazed to caps.
• Flaps thickness (mm):

3. Rounding Off (Clause None)

• Follow IS 2:1960 for rounding test results to match the precision of specified values.

flowchart TD
    A[Lot Size] --> B[Sample Size]
    B --> C[Permissible Defects]
    D[Material] --> E[Cylindrical Casing: Brass ≥1.6mm]
    D --> F[Caps: Cast Brass]
    D --> G[Forks: Mild Steel or Brass]
    D --> H[Flaps Thickness by Size]

This summary covers critical manufacturing and quality control parameters from IS 453 for spring hinges.

IS 453: Finish and Surface Treatment for Hinges

Key Specifications (Clause 8.1)

• Mild Steel Hinges:
  • Finish: Stove-enamelled black or copper-oxidized.
• Brass Hinges:
  • Finish options: Satin, bright, nickel-plated, or copper-oxidized.

Additional Notes

• Unless otherwise specified, these finishes apply.
• Surface treatments improve corrosion resistance and aesthetic appeal.
• Manufacturer must provide a certificate of compliance with relevant Indian Standards for materials used.

Related IS References for Materials

Summary Table: Finish Types

This ensures durability and standard compliance for hinges in building hardware applications.

IS 453: Performance Tests - Key Points

IS 453 does not provide explicit formulas or detailed tables for performance tests within the given clauses. However, the standard emphasizes:

• Rounding Off Results: All test or analysis results must be rounded per IS 2:1960 rules, maintaining the same number of significant digits as specified values.

• Sampling & Conformity: Clause 2.1 and Annex A reference sampling plans and criteria for conformity, important for performance validation. Refer to TABLE 12 (Sampling and Criterion for Conformity) for acceptance criteria.

• Finish Specifications: Clause 8.1 outlines finishes affecting performance (corrosion resistance):

  • Mild Steel Hinges: stove-enameled black or copper-oxidized.
  • Brass Hinges: satin, bright, nickel-plated, or copper-oxidized.

Recommended Approach for Performance Tests:

• Use random sampling per IS 4905 and IS 7608 for test specimen selection.
• Follow test procedures from referenced IS standards for material specifics (e.g., IS 280 for mild steel wire).
• Evaluate test results against acceptance criteria in sampling tables.
• Round off numerical results as per IS 2:1960.

Summary Table: Finish Types & Performance Impact

For detailed performance test procedures and acceptance criteria, consult the referenced IS standards and sampling tables in IS 453 Annex A & Clause 2.1.

IS 453: Marking Specifications for Hinges

Clause 10.1:

• Hinges may be marked with the Standard Mark (BIS mark), indicating conformity to IS 453.
• The Standard Mark assures compliance with quality, inspection, and testing under BIS supervision.

Marking Requirements:

• Manufacturer’s identification
• Standard Mark (BIS logo)
• Batch or lot number for traceability
• Material grade or type (if applicable)

Conformity Criterion (Clause 4.1, Table B-4):

• A lot is accepted if defective hinges ≤ allowable number in Table 1 (sampling plan).
• Manufacturer must provide a certificate of compliance with relevant Indian Standards for materials.

Summary Table: Marking & Conformity

Additional Notes:

• Marking helps in quality assurance and traceability.
• Use IS 2:1960 for rounding off test results.
• BIS licensing governs use of the Standard Mark.

flowchart LR
    A[Manufacture Hinge] --> B[Mark with Standard Mark]
    B --> C[Include Manufacturer ID & Batch No.]
    C --> D[Testing & Inspection]
    D --> E{Defects ≤ Allowable Limit?}
    E -- Yes --> F[Lot Accepted]
    E -- No --> G[Lot Rejected]

This ensures hinges meet IS 453 quality and marking standards.

IS 453: Packaging and Labeling Key Points

• Labeling Requirements (Clause 11.2):
  Each package must be labeled with:

  • Manufacturer's name or trademark
  • Quantity particulars
  • Description and contents
  • Size and type of hinges (e.g., blank or double acting)

• Lot Definition (Clause B-1.1):
  A lot consists of all spring hinges of the same type and size manufactured at the same time.

• Sampling and Conformity (Clause 12 & Annex A):
  Sampling follows IS 4905, IS 7608, and other referenced IS codes for random sampling methods.
  The lot size and sample size are defined per the standard's sampling plan (Clause B-2).

• Rounding Off (General Clause):
  Test results should be rounded as per IS 2:1960 rules, maintaining the same significant digits as specified.

Summary Table: Labeling Information

flowchart TD
    A[Manufacture Hinges] --> B[Group by Type & Size (Lot)]
    B --> C[Package Hinges]
    C --> D[Label Package]
    D --> E[Label includes Manufacturer, Quantity, Description, Size & Type]
    E --> F[Sampling & Testing per IS 4905, IS 7608]
    F --> G[Conformity Decision]

This ensures traceability and quality control per IS 453.

IS 453: Sampling and Criterion for Conformity

Key Points from Clause 12.1 and Table B-2.1

• Sampling depends on lot size.
• Criterion for conformity is based on permissible defective items in the sample.

Procedure:

• Select the sample size based on the lot size.
• Inspect the sample.
• If the number of defective hinges ≤ permissible defective hinges, accept the lot.
• Otherwise, reject the lot.

Additional Notes:

• Packaging must be labeled with manufacturer, quantity, description, size, and hinge type (Clause 11.2).
• Sampling follows random sampling methods (refer IS 4905:1968, IS 7608:1987).

flowchart TD
    A[Start: Lot Size Known] --> B{Lot Size?}
    B -->|<=100| C[Sample 13 Hinges]
    B -->|101-300| D[Sample 20 Hinges]
    B -->|301-500| E[Sample 32 Hinges]
    B -->|501-1000| F[Sample 50 Hinges]
    B -->|>1000| G[Sample 80 Hinges]
    C --> H[Inspect Sample]
    D --> H
    E --> H
    F --> H
    G --> H
    H --> I{Defective Hinges ≤ Permissible?}
    I -->|Yes| J[Accept Lot]
    I -->|No| K[Reject Lot]

This ensures quality control per IS 453 standards.

IS 453 - List of Referenced Indian Standards (Annex A, Clause 2.1)

This standard references key IS codes essential for materials used in spring hinges and related hardware:

Key Notes:

• Compliance certificates per these IS codes are mandatory for material conformity (Clause 4.1).
• Sampling and conformity criteria are detailed in Table 12 (Clause 2.1).
• These referenced standards ensure quality and uniformity in materials for spring hinges.

Summary Diagram: Reference Flow

graph LR
A[IS 453] --> B[Material Standards]
B --> IS280[Mild Steel Wire (IS 280)]
B --> IS292[Leaded Brass (IS 292)]
B --> IS319[Free Cutting Brass (IS 319)]
B --> IS410[Cold Rolled Brass (IS 410)]
B --> IS4454[Steel Wires for Springs (IS 4454)]
B --> IS4905[Sampling Methods (IS 4905)]
B --> IS7608[Phosphor Bronze Wire (IS 7608)]

For detailed material specifications, testing, and sampling methods, refer directly to these IS codes.

IS 453: Sampling and Conformity Details

1. Scale of Sampling and Criterion for Conformity (Clause 12.1 & Table 1)

• Sample size depends on lot size.
• Defective hinges allowed per sample size as above.
• If defects exceed permissible number, the lot is rejected.

2. Labelling Requirements (Clause 11.2)

• Each package must have:
  • Manufacturer's name/trademark
  • Quantity
  • Description and contents
  • Size and type of hinges (blank or double acting)

3. Referenced Standards (Annex A)

• IS 280: Mild steel wire for general engineering
• IS 4454 (Part 1): Steel wires for cold formed springs
• IS 292, 319, 410: Various brass and bronze standards
• IS 4905, 7608: Random sampling methods

flowchart TD
    A[Lot Size] --> B[Select Sample Size (Table 1)]
    B --> C{Count Defective Hinges}
    C -->|≤ Permissible Defects| D[Accept Lot]
    C -->|> Permissible Defects| E[Reject Lot]
    D --> F[Label Package as per Clause 11.2]

This ensures quality control by statistically sampling spring hinges and verifying conformity before acceptance.

Committee Composition in IS 453

• Committee details are specified in Annex C of IS 453.
• The Builders Hardware Sectional Committee, CED 15 is responsible for the preparation of this standard.

Key Table: Scale of Sampling and Criterion for Conformity (Clause 2.1)

• This table guides sampling size and acceptance criteria for quality control of spring hinges.
• Ensures conformity by limiting defective items in a lot.

If you need detailed committee member names or roles, refer to Annex C of IS 453.