Specification for Combined Key For Hydrant, Hydrant Cover And Lower Valve

IS 910: Scope & Key Specifications Summary

• Scope: Specifies combined keys for hydrant, hydrant cover, and lower valve used in firefighting.
• Designs: Two types of keys detailed in Fig. 1 & Fig. 2 with dimensions in millimeters.
• Tolerances: Where not specified, nominal dimensions apply with tolerances as per IS 2102 (Part 1) - 1980 (General tolerances for linear/angular dimensions).
• Marking: Use of Standard Mark governed by BIS Act, 1986 (Clause 5.1.2).
• Purpose: Ensures uniformity and interchangeability of keys produced in India.
• Dimension Reference:
  • Combined key length: 18 mm bar width (Fig. 1 & 2)
  • Flat end and eye for bar handling shown in figures.

Key Points Table

Tolerance Reference (IS 2102 Part 1)

flowchart LR
    A[IS 910 Scope] --> B[Combined Key for Hydrant]
    B --> C[Two Types: Fig.1 & Fig.2]
    B --> D[Dimensions in mm]
    B --> E[Tolerances per IS 2102 Part 1]
    B --> F[Standard Mark as per BIS Act]

This concise scope ensures proper manufacturing and quality control of fire hydrant keys for safety and interoperability.

IS 910: Specification for Combined Key for Hydrant, Hydrant Cover and Lower Valve (1980)

Key References & Specifications:

• Standard Mark Usage: Governed by BIS Act 1986; licensing details available from BIS.
• Dimensions & Tolerances:
  • Two designs specified (Fig. 1 & Fig. 2).
  • Dimensions in mm.
  • Tolerances per IS 2102 (Part 1) - 1980 apply where not specified.
• Material & Finish: Ready mixed paint, bituminous, black, lead-free, acid/alkali/water/heat resisting as per general purpose specifications.
• Marking: Clause 5.1.2 details marking requirements.
• Design Details:
  • Fig. 1 & Fig. 2 show the shape and dimensions of keys.
  • Eye for taking the bar and flat end shown.
  • Bar size: 18 mm.

Important Contacts for BIS:

Summary Table: Key Dimensions (mm)

Notes:

• Rounding off per IS 2-1960.
• Standard helps manufacture keys of proper specification.
• Two designs currently manufactured in India are covered.

flowchart TD
    A[IS 910 Standard] --> B[Combined Key Design]
    B --> C{Design Types}
    C --> D[Fig. 1]
    C --> E[Fig. 2]
    B --> F[Dimensions & Tolerances]
    F --> G[IS 2102 (Part 1) - 1980]

IS 910: Shape and Dimensions of Combined Keys for Hydrants

Key Points from IS 910:

• Shape & Dimensions: Defined in Figures 1 & 2 (combined key for hydrant, cover, and valve).
• Units: All dimensions in millimeters.
• Tolerances: Where not specified, nominal dimensions apply; tolerances per IS 2102 (Part 1) - 1980.
• Material: Cast steel per IS 1030-1982.
• Pipe Portion: As per IS 1239 (Part I) - 1979.

Typical Dimensions (from Figures 1 & 2):

Tolerance Reference:

• IS 2102 (Part 1) covers general tolerances for linear/angular dimensions.
• Use standard rounding rules as per IS 2102.

Summary Table for Dimensions (Example):

Material Specifications:

• Cast Steel: IS 1030-1982
• Pipe Portion: IS 1239 (Part I) - 1979

flowchart LR
    A[Combined Key] --> B(Bar Width 18 mm)
    A --> C(Key Length 180 mm)
    A --> D(Eye Diameter 13 mm)
    A --> E(Flat End)
    B & C & D & E --> F[Tolerances per IS 2102 (Part 1)]
    A --> G[Material: Cast Steel (IS 1030-1982)]

For exact

IS 910 - Material and Finish Specifications

• Material Finish (Clause 4.1):

  • The combined key shall be free from burrs and sharp edges to ensure safety and proper fit.
  • It shall be coated with two coats of anti-corrosive black paint as per IS 158:1968 (ready mixed, brushing, bituminous, black, lead-free, acid, alkali, water, and heat resisting for general purposes).

• Dimensional Tolerances (Clause 3.1):

  • Dimensions and tolerances for the two key designs are per Figures 1 & 2.
  • Where tolerances are not specified, apply IS 2102 (Part 1) - 1980 general tolerances for linear and angular dimensions.

Summary Table for Finish

Key Points:

• Proper surface finish ensures durability and safety.
• Anti-corrosive coating protects against environmental degradation.
• Tolerances ensure interchangeability and proper functioning.

flowchart LR
    A[Raw Key Material] --> B[Deburring & Edge Finishing]
    B --> C[Apply 1st Coat of Anti-Corrosive Paint]
    C --> D[Drying]
    D --> E[Apply 2nd Coat of Anti-Corrosive Paint]
    E --> F[Final Inspection & Tolerance Check]

This process ensures a durable, safe, and standard-compliant combined key per IS 910.

IS 910: Marking Specifications for Combined Key for Hydrant, Hydrant Cover, and Lower Valve

Clause 5.1 - Marking Requirements:

Each key shall be clearly and permanently marked with:

• Manufacturer's name or trade-mark
• Type of key
• Year of manufacture

Clause 5.1.1:

• The key may also carry the Standard Mark as per BIS regulations.

Clause 5.1.2:

• Use of the Standard Mark is governed by the Bureau of Indian Standards Act, 1986.
• Licensing conditions for use of the Standard Mark are available from BIS.

Summary Table for Marking

Notes:

• Marking should be durable and legible throughout the key’s service life.
• Refer to IS 2:1960 for rounding off values in marking or labeling.
• For licensing and use of Standard Mark, contact BIS regional offices (see context for addresses).

flowchart TD
    A[Manufacture of Key] --> B[Marking Process]
    B --> C{Marking Elements}
    C -->|Manufacturer's Name| D[Permanent Mark]
    C -->|Type of Key| D
    C -->|Year of Manufacture| D
    C -->|Standard Mark (Optional)| E[BIS License Required]

For detailed design dimensions and tolerances, refer to IS 910 figures and tables.

IS 910 - Tolerances Summary

1. Key Dimensions & Tolerances:

• Refer to Fig. 1 & Fig. 2 for shape and dimensions of combined keys for hydrant, hydrant cover, and lower valve.
• Dimensions without specified tolerances are nominal.
• Applicable tolerances follow IS 2102 (Part 1) - 1980 for general linear and angular dimensions.

2. Reference Standard for Tolerances: IS 2102 (Part 1) - 1980

• Covers general tolerances for:
  • Linear dimensions
  • Angular dimensions
  • Form and position tolerances

Typical Tolerance Guidelines (from IS 2102 Part 1):

• Angular tolerances generally range from ±0.5° to ±2° depending on application.

Notes:

• Use cast steel conforming to IS 1030-1982 for key material.
• Pipe portion to conform to IS 1239 (Part I) - 1979.
• For unspecified dimensions, apply the above general tolerances.
• Marking and licensing for the Standard Mark are governed by BIS regulations (Clause 5.1.2).

flowchart TD
    A[Key Dimensions] --> B[Fig. 1 & Fig. 2]
    B --> C{Tolerances Specified?}
    C -- Yes --> D[Use Specified Tolerances]
    C -- No --> E[Apply IS 2102 Part 1 Tolerances]
    D & E --> F[Final Dimensions]

Summary: Always check Fig. 1 & 2 for dimensions and tolerances. If not specified, apply IS 2102 Part 1 general tolerances for linear/angular dimensions. Use cast steel per IS 1030 and mild steel tubes per IS 1239 for components.

IS 910 (1980) focuses on Combined Key for Hydrant, Hydrant Cover, and Lower Valve with key QA/testing aspects as follows:

Testing and Quality Assurance Highlights:

• Dimensional Tolerances:
  Use tolerances as per IS 2102 (Part 1)-1980 for linear/angular dimensions unless specified otherwise.

• Marking & Licensing:
  Use of Standard Mark follows BIS Act, 1986 rules (Clause 5.1.2). Manufacturers must comply with BIS licensing conditions for quality assurance.

• Shape & Dimensions:
  Two key designs are specified with detailed dimensions and tolerances in Figures 1 & 2 of IS 910.

• Rounding Off:
  Test results must be rounded per IS 2-1960 rules, maintaining significant figures consistent with specified values.

Summary Table for QA & Testing

Quick Formula for Rounding Off (IS 2-1960):

• Round to the same decimal place as the standard value.
• Example: If standard = 10.0 mm, test = 10.03 mm → round to 10.0 mm.

For detailed QA, manufacturers should refer to the dimensional drawings and tolerances in IS 910 Figures and IS 2102, plus BIS licensing for Standard Mark compliance.

Licensing and Use of Standard Mark (IS 910)

Key Points from Clause 5.1.2:

• The use of the Standard Mark is governed by the Bureau of Indian Standards Act, 1986.
• Licenses for use of the Standard Mark are granted under rules by the Bureau of Indian Standards (BIS).
• Manufacturers/producers must comply with BIS conditions to obtain the license.
• Details on licensing conditions can be obtained directly from the BIS offices.

Marking Specifications (Clause 5.1)

Each combined key (for hydrant, cover, valve) must be clearly and permanently marked with:

• Manufacturer’s name or trade-mark
• Type of key
• Year of manufacture

Additionally, the key may bear the Standard Mark as per Clause 5.1.1.

Contact for Licensing & Details

Summary Diagram: Licensing & Marking Process

flowchart TD
    A[Manufacturer applies for license] --> B{BIS reviews application}
    B -->|Approved| C[License granted to use Standard Mark]
    B -->|Rejected| D[Application rejected]
    C --> E[Manufacturer marks product with Standard Mark, name, type, year]
    E --> F[Product marketed as IS 910 compliant]

For detailed licensing conditions, contact the nearest BIS office listed above or visit the BIS website.