Hand Operated Augers for Cleaning Water-closets, Pipes and Sewers

IS 9110: Introduction and Adoption - Key Points

• Purpose: Harmonizes Indian standards with international practices while considering local field conditions.
• Scope: Applies to the relevant structural/material standards as per Indian construction practices.
• Adoption Approach:
  • Emphasizes international coordination for global compatibility.
  • Adapts to Indian field realities ensuring practical applicability.
• No specific formulas or tables are provided in the introduction clause.
• Standard Reference: Published by the Indian Standards Institution (now BIS) in 1979.

Summary:

flowchart LR
    A[International Standards] --> C[IS 9110 Adoption]
    B[Indian Field Practices] --> C
    C --> D[Unified Indian Standard]

This clause sets the framework for standard development rather than technical specs.

IS 9110 - Scope: Key Specifications & Tables Summary

Scope: Covers specifications for coil spring augers used in pipe and sewer cleaning, including materials, dimensions, and construction styles.

Key Specifications:

• Materials:

  • Brass tubes with return bends to prevent water spillage (Clause 4.1.3).
  • Steel wires for coil springs: Grade 2 and Grade 4 wires (cold-formed, patented, cold-drawn).
  • Aluminium and carbon steel sheets for housing and components.

• Auger Types & Classes:

  • Type II, Class 1: Flexible coil spring with offset sliding handle.
  • Type II, Class 2: Top Snake style with two styles:
    • Style A (light duty)
    • Style B (heavy duty)

Important Tables:

Sample Table Format (Table 1):

IS 9110: Classification & Key Specs for Hand Operated Augers

1. Classification of Augers (Clause 2 & 4.2.1)

• Type II, Class 1: Flexible coil spring with offset sliding handle
• Type II, Class 2, Style B: Heavy-duty top snake with base and geared revolver handle

2. Key Dimensions & Specifications

3. Additional Notes

• Materials and workmanship must comply with IS 9110 standards.
• Class 1 augers have a sliding reversible handle.
• Class 2 Style B augers have a base for upright operation with crank or

IS 9110: Material Requirements - Key Specifications

• Brass Tubes (Clause 4.1.3):

  • Must have a return bend to retain water when removing the spring from the closet bowl.
  • Conform to IS: 319- Second Revision (Brass tubes for general purpose).

• Mild Steel Sheets (Clause 3.1.7):

  • Conform to IS: 513-1973 or IS: 1079-1973.

• Cast Iron:

  • Grade FG 150 as per IS: 210-1978.

• Aluminium Sheets (Clause 3.1.6):

  • Conform to IS: 737-1974.

• Steel Wires for Springs:

  • Use patented and cold drawn unalloyed steel wires as per IS specifications (Part I).

• Steel Sheets and Strips:

  • Cold rolled: Refer IS: 513 (second revision).
  • Hot rolled: Refer IS: 1079 (third revision).

Summary Table:

This ensures material compliance for durability and functionality in plumbing fixtures.

IS 9110: Design and Construction Requirements - Key Points

1. Tube Specification (Clause 4.1.3)

• Brass tube must have a return bend to prevent water spillage when removing the spring.
• Tube must be smooth, round with square-cut ends (Type I only).
• Tube fastening device must be secure and prevent crushing.

2. Auger Conformity Criteria (Clause 7.4)

• Sample augers checked for:
  • Completeness, rotatability, material, finish, workmanship.
  • Defects like broken springs, missing parts, sharp edges, corrosion, improper handle or tube fastening.
• Refer Table 2 of IS:2500 (Part I) for 4.0% AQL sampling inspection.

3. Auger Dimensions & Types

• Style B must have a base allowing housing to turn freely.
• Crank handle or geared revolver-type device to revolve the auger.

Summary Diagram of Auger Types

IS 9110 - General Requirements & Key Specifications

1. Tube (Clause 4.1.3)

• Brass tube must have a return bend to retain water when removing the spring from the closet bowl.

2. Materials

• Cast Iron: Grade FG 150 as per IS:210-1978.
• Steel Wires: Cold-formed spring wires as per IS specifications.
• Brass Tubes: For general purposes, per IS standards.
• Steel Tubes: Mild steel tubes as per IS specifications.

3. Auger Dimensions & Specifications

Table 1: Type II, Class 1 (Flexible Coil Spring, Offset Sliding Handle)

Table 3: Type II, Class 2, Style B (Heavy Duty)

Summary:

• Use **Grade

IS 9110: Marking Requirements & Key Specifications

Marking (Clause 6.1 & 6.2)

Each auger shall be legibly and indelibly marked with:

• Manufacturer's name or trademark
• Type, class, and style
• Diameter of the coil
• Material and size of coil wire
• Length of coil or flat spring
• Year of manufacture

Additionally, augers may carry the ISI Certification Mark under the Indian Standards Institution Act, ensuring compliance and quality control.

Table: Dimensions of Type II, Class 2, Style A Augers (Clause 4.2.2, Table 2)

Notes:

• Style A augers have a handcrank fixed to the cover, not extending beyond housing diameter.
• Marking ensures traceability and conformity to IS standards.
• ISI Mark guarantees ongoing quality inspection by ISI.

flowchart TD
    A[Auger Manufactured] --> B[Marking with Manufacturer Info]
    B --> C[Marking with Type, Class, Style]
    C --> D[Marking Coil Diameter & Wire Size]
    D --> E[Marking Length & Year of Manufacture]
    E --> F{ISI Certification Mark?}
    F -- Yes --> G[ISI Mark Applied]
    F -- No --> H[No ISI Mark]

IS 9110 Sampling and Inspection Key Points

Sample Size (Clause 7.3)

• Use Inspection Level III from Table 1, IS 2500 (Part I)-1973 for sample size.
• Sampling is random and each lot is considered separately (Clause 7.2).

Criteria for Conformity (Clause 7.4)

• Each sample auger must be checked for:
  • Completeness, rotatability, material, finish, workmanship.
  • Defects leading to rejection include:
    • Incorrect type/class/size.
    • Missing components.
    • Material not as specified.
    • Broken coil spring, rough wire finish.
    • Defective cleaning head or handle.
    • Tube fastening issues, improper tube shape (Type I).
    • Handle/spring/clamp defects (Type II).
    • Housing and locking device defects (Type II, Class 2).
    • Base or housing rotation issues (Type II, Class 2, Style B).
    • Coil spring dimensions incorrect.
    • Sharp edges, corrosion susceptibility.
    • Auger binding or inoperable.
• Use 4.0% AQL acceptance criteria from Table 2, IS 2500 (Part I)-1973.

Summary Table (Sampling & Inspection)

Notes:

• Refer IS 2500 (Part I) for detailed tables on sample sizes and acceptance numbers.
• Inspection focuses on attributes (presence/absence of defects) rather than measurements only.

flowchart TD
    A[Lot Received] --> B[Random Sampling]
    B --> C[Sample Size per IS 2500 Level III]
    C --> D[Inspect Each Auger for Defects]
    D --> E{Any Defect Found?}
   

IS 9110 - Key Tables & Specifications for Class 2, Top Snake Augers

Style A (Light Duty) - Clause 4.2.2(a)

• Handcrank fixed to cover, not extending beyond housing diameter.
• Similar to Fig. 3.
• Coil spring dimensions per Table 2:

Style B (Heavy Duty) - Clause 9.5(b)

• Base supports housing; crank or geared revolver attached.
• Similar to Fig. 4.
• Coil spring dimensions per Table 3:

Notes:

• Wire grades affect diameter and spring dimensions.
• Dimensions ensure compatibility and durability for specified duty.
• Handcrank and housing design ensure ergonomic operation.

flowchart LR
    A[Style A: Light Duty] --> B[Handcrank fixed to cover]
    B --> C[Coil Spring per Table 2]
    A --> D[Fig. 3]
    E[Style B: Heavy Duty] --> F[Base supports housing rotation]
    F --> G[Crank or geared revolver]
    G --> H[Coil Spring per Table 3]
    E --> I[Fig. 4]

For