Resin-treated compressed wood laminates (compregs) - Specification, Part 2: For chemical purposes

IS 3513 Part 2: Scope - Key Specifications

Physical Properties (Clause 8.1, Table 1)

Mechanical Requirements (Clause 8.2, Table 2)

IS 3513 Part 2: Key Mechanical & Physical Properties

Mechanical Requirements (Table 2, Clause 8.2)

Physical Properties (Table 1, Clause 8.1)

References to IS Codes for Testing

• **IS

IS 3513 Part 2: Key Definitions & Specifications

1. Definitions

• Refer to IS 707:1976 for standard definitions related to materials in this code.

2. Physical Properties (Table 1, Clause 8.1)

3. Mechanical Properties (Table 2, Clause 8.2)

IS 3513 Part 2: Types and Classification of Compreg

Types:

• Type V and Type VI

Table 1: Physical Properties (Clause 8.1)

Table 2: Mechanical Requirements (Clause 8.2)

IS 3513 Part 2: Materials and Veneers Key Points

Veneers (Clause 5.1.1)

• Types: Rotary cut or sliced.
• Grain variation: Max 1 in 10.
• Quality: Smooth, no knots, splits, dry rot, resin pockets.
• Thickness tolerance: ±5%.
• Moisture content: ≤ 8%.
• Timber: Any non-resinous species suitable for compreg.

Grain Direction (Clause 4.1.1)

• Veneers arranged as per Fig. 1, showing grain orientation in laminae.

Mechanical Properties (Table 8.3.1, Clause 8.2)

Summary Diagram of Veneer Grain Arrangement (Fig. 1)

graph LR
A[Veneer Laminae] --> B[

IS 3513 Part 2: Manufacture of Compreg (Chemical Grade) - Key Specifications

1. Manufacture Conditions (Clause 6.2, Table 6)

2. Physical Properties (Clause 8.1, Table 1)

3. Mechanical Properties (Clause 8.2, Table 2)

IS 3513 Part 2: Dimensions and Tolerances for Resin Treated Compressed Wood Laminates (Compregs)

Key Tolerances (Clauses 7.1.2 & 7.1.3)

Additional Notes:

• Finished component tolerances must follow purchaser's drawings (Clause 7.3.1, 6.6).
• Dimensions vary widely by end-use; stock sizes are indicative.
• Tolerances ensure dimensional stability and fit for chemical industry applications.

Summary:

• Use +6/-0 mm for length, +3/-0 mm for width.
• Thickness tolerance depends on nominal size (±10% or ±5%).
• Edge straightness and squareness controlled to 0.2% of length.
• Final dimensions must comply with purchaser's detailed drawings.

flowchart LR
    A[Nominal Size] --> B{Thickness < 6 mm?}
    B -- Yes --> C[Thickness Tolerance ±10%]
    B -- No --> D[Thickness Tolerance ±5%]
    A --> E[Length Tolerance +6/-0 mm]
    A --> F[Width Tolerance +3/-0 mm]
    A --> G[Edge Straightness 0.2%]
    A --> H[Squareness 0.2%]

This ensures compregs meet mechanical and chemical service requirements with precision.

IS 3513 Part 2: Physical & Mechanical Properties Summary

Physical Properties (Clause 8.1, Table 1)

Mechanical Properties (Clause 8.2, Table 2)

IS 3513 Part 2: Workmanship and Finish – Key Points

1. Workmanship Tolerances (Clause 7.3.1)

• Finished components or blanks must conform to tolerances specified in purchaser’s drawings.
• No generic tolerance; strictly per order documentation.

2. Finish Specifications (Clause 14.1)

Purchaser must specify:

• Material type, size, thickness
• Number of boards/components
• Detailed drawings with dimensions and tolerances
• Finish type:
  • Platten finish (smooth surface)
  • Machine finish
  • Oil finish or varnish finish
• Any special requirements

3. Testing for Quality (Clause 8.3.2 & 11.1)

• Test blanks for:
  • Impact strength
  • Bending strength
  • Compression strength
• After soaking 12 weeks in chemical solutions (Table 3, IS 3513 Part 4), strength must not fall below specified % of original values.

Summary Table: Workmanship & Finish Requirements

If you need detailed chemical solutions or strength retention percentages, refer to Table 3 of IS 3513 Part 4.

flowchart TD
    A[Order Placement] --> B[Provide Material & Finish Specs]
    B --> C[Manufacture Components]
    C --> D[Test Blank Specimens]
    D --> E{Strength Retained?}
    E -- Yes --> F[Deliver Finished Product]
    E -- No --> G[Rework or Reject]

This ensures quality workmanship and finish per IS 3513 Part 2 standards.

IS 3513 Part 2 – Marking Specifications (Clause 12.1)

Each compreg board/component/package shall be legibly and indelibly marked with:

• Type and finish
• Manufacturer's name, initials, or recognized trademark
• Year of manufacture
• Batch number

Additional purchaser-specified marks may also be included.

Mechanical Properties (Table 2, Clause 8.2)

Notes on Standard Marking

• The Standard Mark ensures compliance with BIS inspection and quality control.
• Use of the Standard Mark is governed by the BIS Act, 1986.
• Manufacturers must obtain a license for the Standard Mark.

flowchart TD
    A[Compreg Product] --> B{Form}
    B -->|Board| C[Mark each Board]
    B -->|Component| D[Mark each Component]
   

IS 3513 Part 2: Sampling and Tests - Key Formulas, Tables, and Specifications

1. Sampling

• Sampling as per IS 3513 Part 4:1966 (Clause 10.1).

2. Test Specimens

• Specimens cut from selected boards tested according to methods in relevant tables (Clause 11.1).

3. Physical Properties (Clause 8.1)

4. Mechanical Properties (Clause 8.2)

IS 3513 Part 2: Packing and Delivery Key Points

Packing (Clause 13.1)

• Boards/components must be clean and dry at delivery.
• Packing should be suitable to protect the material during transit.

Marking (Clause 12.1)

Each board/component/package must be legibly and indelibly marked with:

• Type and finish
• Manufacturer’s name/trade mark
• Year of manufacture
• Batch number

Information to be Supplied by Purchaser (Clause 14.1)

Purchaser must provide:

• Quantity (number of boards/components)
• Material type
• Size and thickness
• Detailed drawings with tolerances (if components)
• Finish type (platten or machine)
• Surface finish (oil or varnish)
• Any special requirements

Summary Table for Packing & Delivery

This ensures quality control and traceability from manufacture to delivery per IS 3513 Part 2.

IS 3513 Part 2 – Information to be Supplied by Purchaser

Per Clause 14.1, the purchaser must provide the following with the order:

• Quantity: Number of boards or components.
• Material Type: Specify the wood or material grade.
• Dimensions: Size and thickness of boards/components.
• Drawings: Detailed component drawings with dimensions and tolerances (per Clauses 6.6 & 7.3.1).
• Finish: Indicate if platten finished or machine finished.
• Surface Treatment: Oil finish or varnish finish.
• Special Requirements: Any additional specifications or treatments.

Additional Notes:

• Components must comply with purchaser’s drawings and tolerances.
• Delivery should be clean, dry, and properly packed (Clause 13.1).

Summary Table for Purchaser's Information

flowchart TD
    A[Purchaser Order] --> B[Quantity]
    A --> C[Material Type]
    A --> D[Size & Thickness]
    A --> E[Drawings & Tolerances]
    A --> F[Finish Type]
    A --> G[Surface Treatment]
    A --> H[Special Requirements]
    B & C & D & E & F & G & H --> I[Supplier Processes Order]

This ensures clarity and compliance with IS 3513 Part 2 requirements for ordering plywood boards or components.