How to Choose High-Temperature Equipment Insulation: Rock Wool vs. Ceramic Fiber

For industrial furnaces, marine exhaust flues and chemical reactors, working temperatures vary widely. Harmony provides rock wool and ceramic fiber solutions with clear temperature boundaries for precise material selection.

1. Rock Wool: Cost-Effective for Up to 750°C

Made from basalt, rock wool offers a service temperature of 650–750°C, with high density, good mechanical strength and excellent corrosion resistance.

Products: rock wool blanket, board, pipe sections

Applications: industrial boilers, medium-high temperature pipes, marine fire bulkheads

Advantages: Class A non-combustible, strong structural stability, lower cost for large projects

Ceramic fiber (including RCF and eco-friendly AES fiber) is a refractory material with 800–1260°C service temperature, low heat capacity and excellent thermal shock resistance.

Products: RCF blanket, AES low bio-soluble blanket, fiber modules

Applications: furnace linings, incinerators, marine engine exhausts, high-temperature reactors

Advantages: ultra-high temperature resistance, lightweight; AES fiber meets environmental regulations for ocean-going vessels

Selection Principles

Choose rock wool below 750°C for cost efficiency; choose ceramic fiber above 800°C for high-temperature stability.

Choose AES fiber for international projects and vessels with strict environmental requirements.

Harmony supplies a full range of rock wool, RCF and AES fiber for all temperature ranges, delivering customized high-temperature insulation solutions.