metal stationary cupboards

IS 6189 pertains to Precast Concrete Pipes (Vitrified Clay Pipes) for sewerage and drainage.

Scope (Summary from IS 6189)

• Covers dimensions, materials, and manufacturing of vitrified clay pipes.
• Pipes are intended for sewerage, drainage, and culverts.
• Specifies pipe sizes, wall thickness, jointing, and testing.

Key Specifications:

Important Formulas:

• Pipe Capacity (Q) for circular pipes (flow rate):

[ Q = \frac{\pi}{4} \times d^2 \times v ]

where
(d) = internal diameter (m),
(v) = velocity of flow (m/s).

• Pipe Wall Thickness depends on design pressure and material strength, as per IS 6189 tables.

Summary:

• Pipes must withstand hydraulic pressure, external loads, and chemical attack.
• Joints should be leak-proof and flexible.
• Testing includes water tightness, dimensional checks, and mechanical strength.

flowchart LR
    A[Scope] --> B[Dimensions]
    A --> C[Materials]
    A --> D[Manufacturing]
    A --> E[Testing]
    B --> F[Pipe Sizes & Thickness]
    E --> G[Water Tightness]
    E --> H[Mechanical Strength]

For detailed tables and test methods, refer directly to IS 6189: Part 1 and Part 2.

IS 6189 covers Concrete Sleeves for Electrical Wiring. Regarding Materials, key points include:

Materials Specifications (IS 6189):

• Concrete Mix: Use M20 grade concrete (1:1.5:3) with minimum 28-day compressive strength of 20 MPa.
• Cement: Ordinary Portland Cement (OPC) conforming to IS 269 or IS 12269.
• Aggregates: Clean, well-graded coarse and fine aggregates as per IS 383.
• Water: Clean and free from impurities.

Key Formulas:

• Concrete Mix Proportion:
  Cement : Sand : Coarse Aggregate = 1 : 1.5 : 3

• Minimum Compressive Strength:
  ( f_{ck} = 20 , \text{MPa} ) at 28 days

Typical Dimensions (Table Extract):

Additional Notes:

• Sleeves must be free from cracks and defects.
• Surface should be smooth to avoid damage to wiring.

flowchart LR
    A[Materials] --> B[Cement (OPC)]
    A --> C[Aggregates (IS 383)]
    A --> D[Water (Clean)]
    A --> E[Concrete (M20)]
    E --> F[Mix Ratio 1:1.5:3]
    E --> G[28-day Strength 20 MPa]

This ensures durability and protection for electrical wiring per IS 6189.

IS 6189 covers Design and Dimension for prestressed concrete pipes.

Key Specifications & Formulas:

• Pipe Dimensions:

  • Internal diameter (d)
  • Wall thickness (t), including concrete core and prestressing wire layers
  • Length as per requirement (usually 1m to 3m)

• Design Stresses:

  • Concrete compressive stress, ( f_c )
  • Wire tensile stress, ( f_s )

• Basic Formula for Thickness:

[ t = \frac{P \times d}{2 \times f_c \times \eta} + t_w ]

Where:

• ( P ) = design internal pressure

• ( d ) = internal diameter

• ( f_c ) = allowable compressive stress in concrete

• ( \eta ) = efficiency factor (usually 0.9)

• ( t_w ) = thickness of wire winding layer

• Prestressing Wire:

  • Wire diameter typically 5.5 mm or 7 mm
  • Wire tensile strength ( f_{su} \approx 1600 ) MPa

Typical Table Extract (from IS 6189):

Summary:

• Use IS 6189 for pipe thickness based on design pressure and diameter.
• Prestressing wires are wound in multiple layers to resist tensile stresses.
• Concrete strength and wire tensile strength govern dimensioning.

flowchart LR
A[Internal Pressure] --> B[Calculate Concrete Thickness]
B --> C[Add Wire Layer Thickness]
C --> D[Final Pipe Wall Thickness]

For detailed design, consult IS 6189 clauses on material properties and safety factors.

IS 6189 covers Precast Concrete Pipes, including fabrication guidelines.

Key Fabrication Points:

• Materials: Use concrete of specified grade, well-graded aggregates, and suitable cement.
• Moulds: Rigid, smooth, and non-absorbent to ensure accurate dimensions and surface finish.
• Mixing: Uniform and consistent mix; avoid segregation.
• Compaction: Use vibration or pressure to remove air voids.
• Curing: Minimum 7 days moist curing for strength gain.

Important Specifications:

Basic Fabrication Formula:

• Volume of concrete per meter length:

[ V = \pi \times (R_o^2 - R_i^2) \times 1,m ]

Where:

• (R_o) = Outer radius of pipe
• (R_i) = Inner radius of pipe

flowchart TD
    A[Raw Materials] --> B[Mixing]
    B --> C[Moulding]
    C --> D[Compaction]
    D --> E[Curing]
    E --> F[Quality Testing]

For detailed tables on dimensions and strength, refer to IS 6189 clauses 4-7.

IS 6189 primarily covers welded steel tubes for water and sewage. For Welding and Assembly, key points include:

Welding Specifications:

• Welding method: Typically electric arc welding (SAW, MMAW, or TIG).
• Weld quality: Should be free from cracks, porosity, and undercuts.
• Weld thickness: Equal to or greater than the tube wall thickness.
• Heat treatment: Post-weld heat treatment may be required to relieve stresses.

Key Formulas:

• Weld strength check:

[ \sigma_w = \frac{F}{A_w} ]

Where:

• (\sigma_w) = stress in weld
• (F) = applied force
• (A_w) = effective weld area (length × throat thickness)

Assembly:

• Tubes should be aligned properly before welding.
• Ends must be prepared (beveled or square) as per IS 6189.
• Inspection by visual and non-destructive testing (NDT) methods.

Typical Table: Weld Throat Thickness

flowchart LR
    A[Tube Ends Prepared] --> B[Alignment]
    B --> C[Welding]
    C --> D[Inspection (Visual + NDT)]
    D --> E[Post-Weld Heat Treatment (if needed)]

For detailed welding procedure and qualification, refer to IS 6189 clauses on welding and IS 816 for general structural welding guidelines.

IS 6189 covers specifications for Surface Treatment and Finishing of steel structures, ensuring corrosion protection and durability.

Key Specifications:

• Surface Preparation:

  • Remove rust, mill scale, oil, and grease by sandblasting or wire brushing.
  • Achieve a clean, roughened surface for paint adhesion.

• Types of Surface Treatments:

  • Hot-dip galvanizing: Zinc coating thickness typically 85-100 microns.
  • Paint coatings: Primer + intermediate + finishing coats.
  • Metal spraying: Zinc or aluminum sprayed coatings.

Important Tables (Typical values):

Key Formulas:

• Coating Thickness (d):
  [ d = \frac{W}{A \times \rho} ] Where:
  • (W) = weight of coating (g)
  • (A) = surface area (cm²)
  • (\rho) = density of coating material (g/cm³)

Summary:

• Surface must be clean and rough.
• Use appropriate coating thickness per treatment.
• Follow IS 6189 for inspection and testing of coatings.

flowchart TD
    A[Steel Surface] --> B[Surface Cleaning]
    B --> C{Treatment Type}
    C --> D[Hot-dip Galvanizing]
    C --> E[Paint Coating]
    C --> F[Metal Spraying]
    D --> G[Coating Thickness: 85-100 µm]
    E --> H[Primer + Intermediate + Finish]
    F --> I[Zinc/Aluminum Spray]

For detailed procedures and acceptance criteria, refer to IS 6189 clauses on surface treatment.

IS 6189 deals with Concrete Pipes and Manholes (Precast Concrete).

Performance Requirements & Tests (Summary)

• Strength Requirements: Pipes and manholes must withstand specified load tests (e.g., compressive strength, ring test).
• Water Tightness: Tested by hydrostatic pressure or vacuum to ensure no leakage.
• Dimensional Tolerances: Specified limits on length, diameter, wall thickness.
• Durability: Resistance to chemicals, abrasion, and environmental conditions.

Key Test Methods & Formulas

Typical Dimensional Tolerances

flowchart TD
    A[Raw Materials] --> B[Mixing & Casting]
    B --> C[Curing]
    C --> D[Dimensional Check]
    D --> E[Strength Test]
    E --> F[Water Tightness Test]
    F --> G[Approved for Use]

Note: Refer IS 6189 for detailed test procedures and acceptance criteria.

IS 6189 covers specifications for Packing and Transit of pre-stressed concrete products.

Key Specifications for Packing and Transit (IS 6189):

• Packing:

  • Products must be packed to prevent damage during handling and transit.
  • Use wooden crates, steel frames, or suitable cushioning materials.
  • Ensure protection from moisture, dust, and mechanical shocks.

• Transit:

  • Products should be securely fastened to avoid movement.
  • Use slings or lifting devices as per product design.
  • Follow safe stacking height limits to prevent crushing.

General Guidelines:

Important Formula for Sling Tension:

[ T = \frac{W}{2 \cos \theta} ]

Where:

• (T) = Tension in each sling
• (W) = Weight of the product
• (\theta) = Sling angle with horizontal

graph LR
A[Product] --> B{Packing}
B --> C[Wooden Crates]
B --> D[Steel Frames]
B --> E[Cushioning Material]
A --> F{Transit}
F --> G[Secure Fastening]
F --> H[Safe Sling Angles]
F --> I[Stacking Limits]

This ensures safe transport without damage. For detailed tables, refer to IS 6189 Annexures.

IS 6189 deals with Prestressed Concrete Pipes. For Marking and Certification, the code specifies clear identification and quality assurance measures.

Key Specifications for Marking and Certification (IS 6189):

• Marking on each pipe should include:

  • Manufacturer's name or trademark
  • Nominal size and class of the pipe
  • Date of manufacture (month and year)
  • Batch or heat number for traceability

• Certification:

  • Pipes must be accompanied by a test certificate confirming compliance with IS 6189.
  • Tests include:
    • Dimensional checks
    • Hydraulic pressure test
    • Tensile strength of prestressing wires
    • Concrete strength tests

Important Notes:

• Marking should be durable and legible throughout transportation and installation.
• Certification ensures quality control and traceability for safety and performance.

flowchart LR
    A[Manufacture Pipe] --> B[Mark Pipe with ID]
    B --> C[Conduct Quality Tests]
    C --> D[Issue Test Certificate]
    D --> E[Dispatch with Marked Pipe]

This process ensures pipes meet IS 6189 standards for prestressed concrete pipes.

IS 6189 pertains to Specification for Steel Tubes for Structural Purposes.

Information to be Supplied by the Purchaser (Key Points)

When ordering steel tubes under IS 6189, the purchaser must provide:

• Type of tube (e.g., welded, seamless)
• Dimensions:
  • Outer diameter (OD)
  • Wall thickness (t)
  • Length of tubes
• Grade of steel (as per IS 1239 or relevant grade)
• Quantity
• End finish (plain, beveled, threaded, etc.)
• Surface treatment (if required)
• Tolerance requirements (dimensional and weight)
• Testing requirements (hydrostatic, ultrasonic, etc.)
• Marking details (manufacturer, grade, size)

Typical Dimensional Tolerances (from IS 6189)

Important Formula: Weight of Steel Tube

[ W = \frac{\pi}{4} \times (D^2 - d^2) \times L \times \rho ]

Where:

• (W) = weight (kg)
• (D) = outer diameter (mm)
• (d) = inner diameter (mm) = (D - 2t)
• (L) = length (m)
• (\rho) = density of steel ≈ 7850 kg/m³

flowchart TD
    A[Purchaser] --> B[Specify Tube Type]
    A --> C[Specify Dimensions (OD, t, Length)]
    A --> D[Specify Steel Grade]
    A --> E[Specify Quantity]
    A --> F[Specify End Finish & Surface Treatment]
    A --> G[Specify Tolerances & Testing]
    B & C & D & E & F & G --> H[Manufacturer Produces Tubes]

Summary: Clear, complete information ensures compliance with IS 6189 and smooth procurement.