Vulcanite Armor mineral wool thermal blankets for pipes, vessels, and ducts. Made from high-quality basalt and dolomite. Three density grades of stonewool insulation rated up to 750°C, built for petrochemical, power generation, and mining environments.
Outperforms standard mineral wool (250-300°C). Blanket 120 handles 750°C per ASTM C411/C447. No replacement needed when temperatures climb.
Flame Spread Index of zero and Smoke Developed Index of 20 per ASTM E84. Meets the strictest fire safety requirements for industrial facilities.
Conforms to stainless steel corrosion specifications per ASTM C692 and C795. Chloride ion content at or below 5 PPM. Safe for austenitic stainless steel pipes.
Flexible blanket form fits large diameter piping, storage vessels, and ducting. Available in 30-100mm thickness and up to 120 kg/m³ density for any application.
Three density grades, each engineered for a different temperature range. All available in standard widths (600mm and 1200mm) and thicknesses from 30 to 100mm.
Rockwool insulation prices shown are indicative for 50mm, 600mm wide rolls. Volume discounts available. Contact us for exact pricing on your specification.
All data derived from controlled laboratory testing per international standards. Vulcanite Armor complies with ASTM C592 "Standard specification for mineral fibre blanket insulation, pipe insulation" Type I and III.
| Property | Blanket 80 | Blanket 100 | Blanket 120 | Standard |
|---|---|---|---|---|
| Density | 80 kg/m³ | 100 kg/m³ | 120 kg/m³ | EN1602 |
| Thermal Conductivity | ||||
| At 50°C | 0.038 W/mK | 0.039 W/mK | 0.030 W/mK | ASTM C335 |
| At 100°C | 0.045 W/mK | 0.045 W/mK | 0.035 W/mK | |
| At 150°C | 0.053 W/mK | 0.053 W/mK | 0.053 W/mK | |
| At 200°C | 0.058 W/mK | 0.057 W/mK | 0.057 W/mK | |
| At 250°C | 0.069 W/mK | 0.066 W/mK | 0.066 W/mK | |
| At 300°C | 0.081 W/mK | 0.078 W/mK | 0.078 W/mK | |
| At 350°C | 0.094 W/mK | 0.089 W/mK | 0.089 W/mK | |
| Hot Surface Performance | 650°C | 700°C | 750°C | ASTM C411 / C447 |
| Linear Shrinkage (max %) | 0.40% | 3.5% | 4.0% | ASTM C356 |
| Surface Burning Characteristic | ||||
| Flame Spread Index (FSI) | 0 | 0 | 0 | ASTM E84 |
| Smoke Developed (SD) | 20 | 20 | 20 | |
| Water Absorption | <1 kg/m² | <1 kg/m² | <1 kg/m² | EN1609 / BS 2972 |
| Water Vapor Sorption | ≤0.4% by weight | ≤0.2% by weight | ASTM C1104 | |
| Corrosion to Stainless Steel | Conforms to ASTM C692 and C871 specifications | ASTM C692 / C795 | ||
| Health & Safety | ||||
| Odor Emission | No perceptible odour present | ASTM C665-06 | ||
| Fungi Resistance | Does not encourage growth of fungi | ASTM C1338 | ||
| Chloride Ion Content | ≤5 PPM | |||
| Dimension | Range | Notes |
|---|---|---|
| Density | 40 - 120 kg/m³ | Custom densities on request |
| Thickness | 30 - 100mm | Standard increments available |
| Width | 600mm / 1200mm | Two standard widths |
| Length | 2.5 - 5m | Per roll |
| Wire Mesh | Galvanized / Stainless steel | 24# or 22# wire, 1" mesh |
Vulcanite Armor rock wool insulation (also known as rokvul or mineral wool) is specified across South Africa's most demanding industrial sectors. Suitable for thermal and acoustic insulation of pipes, vessels, ducts, and equipment.
Refineries, SASOL plants, gas processing
Boilers, turbines, steam pipes
Kilns, furnaces, process piping
Large diameter ducts, air handling
Engine rooms, exhaust, bulkheads
Storage vessels, tanks, equipment
Vulcanite Armor rock wool blankets with wire mesh are designed for straightforward installation on pipes, vessels, and ducts. Follow these guidelines for optimal performance.
Cut the wired mat so that it fits the pipe with slight pre-stressing. Stagger closing joints at 30° minimum.
Wire all closing joints (both lengthwise and circular) securely together.
Finish with aluminium or equivalent metal cladding. Fasten with sheet-metal screws: hard aluminium or stainless steel 1/2", 8 per metre.
Provide expansion joints where necessary. Close with a steel tensioning wire.
Make connections to mountings, end caps, and fittings watertight using a suitable sealant.
Complete technical parameters, thermal conductivity curves, and compliance data in PDF format.
Vulcanite Armor is available in three density grades with different hot surface performance ratings: Blanket 80 handles 650°C, Blanket 100 handles 700°C, and Blanket 120 handles 750°C. Testing is conducted per ASTM C411 and ASTM C447. The product is manufactured from high-quality basalt and dolomite.
Most generic mineral wool products are rated to 250-300°C. Vulcanite Armor handles hot surfaces up to 750°C, has a Flame Spread Index of 0 (per ASTM E84), and water absorption below 1 kg/m² (per EN1609). It is manufactured from high-quality basalt and dolomite using a four-axis centrifuge process, resulting in consistent fibre distribution and superior thermal performance.
Vulcanite Armor is fully compliant with ASTM C592 (Standard Specification for Mineral Fibre Blanket Insulation, Type I and III) and holds ISO, CE, and A1 certification approval. Additional testing covers ASTM C335, C411, C447, C356, E84, C692, C795, C1104, EN1602, and EN1609.
Yes. Vulcanite Armor is specifically designed for industrial environments including petrochemical plants (SASOL, ESCO contractors), power stations, and mining operations. It conforms to stainless steel corrosion specifications per ASTM C692 and C795, with chloride ion content at or below 5 PPM, making it safe for austenitic stainless steel pipe systems.
Standard specifications: Density 40-120 kg/m³, Thickness 30-100mm, Width 600mm or 1200mm, Length 2.5-5m per roll. Wire mesh stitching is available in galvanized or stainless steel (24# or 22# wire, 1" mesh diameter). Custom sizes can be manufactured on request.
Tell us about your insulation requirements. We supply rock wool blankets across South Africa, Namibia, Botswana, Zimbabwe, and Mozambique.
Or call Alex directly: +27 79 527 1448
