Specification - bath-room latches

IS 5899: Scope Summary & Key Specifications for Bathroom Latches

Scope (Clause 1.1):

• Specifies requirements for material, size, and finish of bathroom latches.

Material Requirements (Clause 3.1 & Table 1):
Materials must conform to:

Additional Notes:

• All castings must be free from blowholes and surface defects.
• Cold bending test for mild steel bolts ensures ductility.

Typical Bathroom Latch Illustration

Refer to Fig. 1 in IS 5899 for shape and size details (all dimensions in mm).

This concise scope ensures quality, durability, and standardization of bathroom latch materials and construction.

IS 5899 — Shape and Size of Bath-room Latches

Key Points from Clause 2:

• Shape & Size:
  Bath-room latches may be of various shapes and sizes as mutually agreed between manufacturer and purchaser (Clause 2.2).

• Typical Illustration:
  Refer to Fig. 1 in the standard for a typical latch shape (dimensions in mm).

Material Specifications (Related to Shape & Size)

Rounding & Dimensions

• All dimensions are in millimetres.
• Follow the revised rules for rounding numerical values (refer IS 5899 Clause 1.1).

Summary Diagram of Latch Components

graph TD
    A[Body] --> B[Knob]
    A --> C[Bolt]
    B --> D[Material: Brass/Cast Iron/Aluminium]
    C --> D

Note: For exact dimensions, refer to Fig. 1 in IS 5899 or mutually agreed specifications. Material grades ensure durability and finish quality.

IS 5899: Material Specifications for Bathroom Latches (Clause 3.1, Table 1)

Notes:

• Copper content in brass is critical for corrosion resistance and strength.
• Cold bend test for mild steel bolts ensures ductility.
• All castings must be free from defects like blowholes.
• Refer to respective IS standards for detailed mechanical properties.

IS 5899: Manufacture and Construction of Bathroom Latches

Key Specifications (Clause 3.1 & 4.1)

• Material Requirements for Latch Parts (Table 1):

• Manufacture:
  • Knobs must be of suitable shape for smooth bolt operation (Clause 4.1).
  • Castings must be free from blowholes and surface defects.
  • Cold bending test for steel parts ensures ductility.

Summary of Material Properties

Notes:

• Follow IS:2-1960 for rounding off test values.
• Material grades ensure durability and operational smoothness.
• Suitable IS standards must be referenced for procurement and quality control.

flowchart TD

IS 5899: Workmanship and Finish for Bathroom Latches

Key Specifications (Clause 3.1 & 5)

Workmanship Notes:

• Knob must have a suitable shape for smooth bolt operation (Clause 4.1).
• Castings should be free from surface and casting defects.
• Cold bending test for mild steel bolts ensures ductility and toughness.

Quick Reference Formula for Tensile Strength Units:

• 1 kg/mm² = 9.81 MPa

flowchart TD
    A[Material Selection] --> B{Body}
    B -->|Cast Brass| C[IS: 292-1961 Grade 3]
    B -->|Cast Iron| D[IS: 210-1962 Grade 15]
    B -->|Aluminium Alloy| E[IS: 617-1959 A-5-M/A-6-M]
    B -->|Aluminium Extrusions| F[IS: 733-1967 HE-9 WP/HE-19 WP]
    A --> G{Bolts}
    G -->|Brass Cast/Extruded| H[IS: 319-1962]
    G -->|Mild

IS 5899: Testing and Compliance for Bathroom Latches

Key Specifications (Clause 3.1 & Table 1)

• Materials must conform to IS standards with specified grades:
  • Body:
    • Cast Brass: ≥60% Copper, Grade 3, IS:292-1961
    • Cast Iron: Tensile strength ≥15 kg/mm², HB 149-197, Grade 15, IS:210-1962
    • Aluminium Alloy: IS Designation A-5-M or A-6-M, IS:617-1959
    • Aluminium Extrusions: IS Designation HE-9 WP or HE-19 WP, IS:733-1967
  • Bolts & Knobs: Similar material requirements as body with tensile strength and copper content criteria.

Testing Requirements

• Material Quality: Free from blow holes, surface defects.
• Mechanical Properties: Tensile strength, hardness as per specified IS grades.
• Ductility: Mild steel parts must withstand cold bending without cracks.

Compliance

• Testing to be done at ISI-approved laboratories or regional offices listed in the standard.
• Final test values rounded per IS:2-1960.

Summary Table: Material Requirements

flowchart TD
    A[Material Selection] --> B{Type of Part}
    B -->|Body| C[Cast Brass / Cast Iron / Aluminium]
    B -->|Bolts| D[Brass / Mild Steel / Aluminium]
    B -->|Knob| E[Same as Body]
    C

IS 5899: Marking and Packaging - Key Points

The provided context mainly covers materials for latches (Clause 3.1, Table 1), not explicit marking or packaging. However, typical IS code practices for marking and packaging include:

Marking

• Each latch must be clearly marked with:
  • Manufacturer's identification
  • ISI mark (if applicable)
  • Batch or lot number
  • Material grade (as per Table 1)

Packaging

• Packaging should protect the latch from:
  • Mechanical damage
  • Corrosion during transportation and storage
• Use suitable packing materials (e.g., sealed boxes, anti-rust paper)
• Packages should be labeled with:
  • Product name
  • Quantity
  • Manufacturer's name and address
  • Handling instructions

Materials Summary from Table 1 (Clause 3.1):

Notes:

• Use IS-approved materials for durability and performance.
• Marking and packaging ensure traceability and product integrity.

flowchart LR
    A[Manufacture] --> B[Marking]
    B --> C[Packaging]
    C --> D[Storage & Transport]
    D --> E[Installation]

For detailed marking and packaging, refer to IS 5899 full text or related IS standards on packaging.