ASTM C155-97(2022) PDF

Overview

ASTM C155-97(2022) - Standard Classification of Insulating Firebrick provides a systematic approach to categorizing heat-insulating materials, specifically insulating firebrick, which are widely used as lining in industrial furnaces. Developed by ASTM International, this classification assists both manufacturers and purchasers in identifying the appropriate group of insulating firebrick based on properties like bulk density and resistance to reheat changes.

The standard enables the orderly grouping of insulating firebrick without prescribing maximum service temperatures but offers a systematic guide for temperature stability. This ensures that users select the most suitable material for high-temperature applications, supporting reliability and efficiency across industrial settings.

Key Topics

• Group Identification: Insulating firebrick are classified by group numbers. While the group number times 100 approximates the temperature in degrees Fahrenheit for reheat change testing, it serves only as a relative indicator of thermal stability.
• Bulk Density: Each group has defined bulk density limits, which specify the maximum weight per unit volume but are not intended for use in detailed engineering calculations.
• Test Methods: The classification requires determination of:
  • Bulk Density using ASTM C134
  • Reheat Change using ASTM C210
• Reheat Change: The standard assesses the percent reheat change of brick at specific temperatures, serving as an indicator of their thermal stability during industrial operations.
• Units and Values: Standards are provided in inch-pound units, with SI conversions provided for reference only.

Applications

Insulating firebrick classified under ASTM C155-97(2022) are essential in numerous high-temperature industrial processes. Their primary applications include:

• Furnace Lining: Insulating firebrick are frequently used for lining industrial furnaces, kilns, incinerators, and similar equipment where heat containment and insulation are critical.
• Thermal Insulation: These materials help reduce heat loss, enhance energy efficiency, and protect structural integrity in extreme environments.
• Material Procurement: Manufacturers and buyers use this standard to specify the right grade of firebrick, ensuring materials meet the necessary performance criteria for specific operations.
• Quality Control: Group classification aids quality assurance processes by providing a basis for comparing products and verifying conformity to customer and industry requirements.

This classification is not intended for insulating materials operating below 1000 °F (538 °C), which are addressed by other ASTM standards.

Related Standards

To ensure comprehensive evaluation and selection of insulating firebrick, reference the following related ASTM standards:

• ASTM C134: Test Methods for Size, Dimensional Measurements, and Bulk Density of Refractory Brick and Insulating Firebrick
• ASTM C210: Test Method for Reheat Change of Insulating Firebrick
• ASTM Committee C16: Standards for thermal insulation materials used at temperatures below 1000 °F (538 °C)

These standards provide procedures and requirements for testing, quality control, and material performance assessment, supporting consistent application of ASTM C155-97(2022) across industrial sectors.

Keywords: insulating firebrick, ASTM C155, heat-insulating materials, furnace lining, bulk density, reheat change, refractory materials, industrial furnaces, ASTM standards, thermal insulation.