Rock Wool Pipe Mineral Fiber Tube Insulation ASTM C411
Comprehensive Thermal and Acoustic Insulation for Industrial and Domestic Pipes
Rock Wool Pipe Insulation / Rock Wool Tube
Product Type: Rock Wool Pipe, Rock Wool Tube, Preformed Rock Wool Pipe Section, Rockwool Pipe Insulation
Standards: ASTM C547 · EN 14303 · AS/NZS 4859.1 · GB/T 11835-2016 · JIS A 9504
Applications: Steam Pipe Insulation · Hot Water Pipe Insulation · Boiler & Tank Insulation · Industrial Process Piping · HVAC Pipe Insulation
About TARCO Industry — Your Trusted Rock Wool Pipe Insulation Manufacturer
As a professional rock wool pipe insulation manufacturer, TARCO Industry produces high-quality preformed rock wool pipe sections and rock wool tubes for high-temperature industrial piping applications.
Furthermore, our factory operates a complete production line from basalt rock melting to fiber forming, binder application, and precision molding into pipe sections.
Consequently, this ensures consistent quality, competitive factory-direct pricing, and reliable global supply.
Therefore, the company engineers its rock wool pipe products to meet the rigorous demands of steam piping, hot water lines, process piping, and industrial equipment insulation projects across international markets.
In addition, as a direct rock wool factory, TARCO Industry eliminates middlemen and provides OEM/ODM services.
Moreover, we export our rock wool pipe and rock wool tube products to customers in North America, Europe, Australia, New Zealand, Southeast Asia, the Middle East, and Oceania.
Consequently, we provide full compliance documentation for each order. Specifically, you can explore our Rock Wool Blanket and Rock Wool Board for more insulation solutions.
Product Overview: Rock Wool Pipe Insulation
Rock wool pipe insulation (also known as rockwool pipe section or rock wool tube) represents a preformed, rigid pipe covering manufactured from fine fibers spun from molten basalt rock and blast furnace slag.
Specifically, the fibers are bonded with a thermosetting resin and molded into cylindrical sections with a longitudinal split for easy snap-on installation over pipes.
Consequently, this structure delivers exceptional thermal insulation, fire protection, and sound absorption for high-temperature industrial pipework.
TARCO Industry produces its rock wool pipe insulation from high-quality basalt rock and blast furnace slag, melting these raw materials at temperatures exceeding 1500°C.
During production, we fiberize the molten rock using high-speed spinning wheels and apply a hydrophobic binder to create water-repellent pipe sections.
Ultimately, the product is precision-molded into pipe sections and can be supplied with various facings including aluminum foil, wire mesh, or glass cloth to suit specific application requirements.
Key Features & Benefits of Rock Wool Pipe Insulation
Furthermore, rock wool pipe insulation offers exceptional fire resistance with a melting point exceeding 1000°C, ensuring the highest level of fire safety in industrial pipework.
Additionally, the product achieves Euroclass A1 non-combustible fire classification per EN 13501-1, the highest possible rating.
Moreover, rock wool pipe sections provide excellent thermal insulation with low thermal conductivity values ranging from 0.033 to 0.049 W/m·K at 50°C.
Consequently, the dense fiber structure delivers superior acoustic performance for noise reduction in industrial piping systems.
Therefore, the hydrophobic binder ensures water repellency with water absorption ≤ 0.2 kg/m², preventing moisture absorption and maintaining thermal performance over time.
In addition, the water-repellent binder mitigates the risk of Corrosion Under Insulation (CUI), extending the service life of insulated pipes.
Furthermore, the product is chemically inert, rot-proof, vermin-proof, and resistant to microbial growth for long service life.
Finally, rock wool pipe sections are lightweight, easy to handle, and supplied split and hinged for easy snap-on assembly over pipes.
Technical Specifications — Rock Wool Pipe Insulation
Physical & Thermal Properties
Furthermore, the following table details the physical and thermal properties of our rock wool pipe insulation.
| Parameter | Unit | Value / Range | Standard |
|---|---|---|---|
| Density | kg/m³ | 40 – 200 (customizable) | ASTM C167 / EN 1602 / GB/T 5480.3 |
| Thickness | mm | 25 – 200 | ASTM C167 / EN 823 |
| Inner Diameter (Nominal Pipe Size) | mm | 22 – 1220 (1/2″ – 48″) | ASTM C585 |
| Standard Length | mm | 1000 | ASTM C585 |
| Thermal Conductivity (λ) at 50°C | W/m·K | 0.033 – 0.049 | ASTM C177 / ASTM C518 / EN ISO 8497 |
| Thermal Conductivity (λ) at 100°C | W/m·K | 0.040 – 0.055 | ASTM C177 / ASTM C518 |
| Thermal Conductivity (λ) at 150°C | W/m·K | 0.050 – 0.065 | ASTM C177 / ASTM C518 |
| Thermal Conductivity (λ) at 200°C | W/m·K | 0.060 – 0.080 | ASTM C177 / ASTM C518 |
| Max. Service Temperature | °C | 650 (density dependent) | ASTM C411 / ASTM C447 / EN 14707 |
| Melting Point | °C | > 1000 | DIN 4102-17 |
| Fiber Diameter | μm | 4.0 – 7.0 | GB/T 13350 |
| Shot Content | % | ≤ 12 | GB/T 13350 |
| Water Absorption | kg/m² | ≤ 0.2 (after 24h pre-heating at 250°C) | EN 13472 / ASTM C1104 |
| Water Vapour Diffusion Resistance | μ | 1 | EN 14303 |
| Leachable Chloride | ppm | ≤ 10 (low-chloride grade available: ≤ 6) | ASTM C871 / EN 13468 |
| Organic Content | % | ≤ 4.0 | GB/T 11835 |
| Recycled Content | % | Up to 50 | — |
| Facing Options | — | Unfaced / Aluminum Foil / Wire Mesh / Glass Cloth | — |
Fire Performance & Safety
Additionally, the following table outlines the fire performance and safety standards for rock wool pipe insulation.
| Parameter | Result | Standard |
|---|---|---|
| Reaction to Fire | Euroclass A1 / Non-combustible | EN 13501-1 / IMO 2010 FTP Code |
| Non-combustibility | Non-combustible | ASTM E136 / AS 1530.1 |
| Flame Spread Index (FSI) | 0 | ASTM E84 / UL 723 |
| Smoke Developed Index (SDI) | 0 | ASTM E84 / UL 723 |
| Fire Hazard Properties | Ignitability: 0, Spread of Flame: 0, Heat Evolved: 0 | AS/NZS 1530.3 |
| Corrosion Resistance | Passes ASTM C795/C692 stress-corrosion drip test over Type 304 stainless steel | ASTM C871 / ASTM C692 |
| Fungal Resistance | Does not support fungal growth | ASTM C1338 |
| IARC Classification | Group 3 (Not classifiable as carcinogenic to humans) | IARC |
International Standards Compliance for Rock Wool Pipe Insulation
TARCO Industry manufactures and tests its rock wool pipe and rock wool tube products in accordance with the following international standards, ensuring global market compatibility and regulatory compliance.
Furthermore, you can verify these standards on the official websites of ASTM International, ISO, and Standards Australia.
USA / NORTH AMERICA ASTM C547 — Mineral Fiber Preformed Pipe Insulation
Furthermore, ASTM C547 represents the standard specification for mineral fiber preformed pipe insulation for industrial and commercial applications.
Additionally, this standard covers the classification, composition, physical properties, and dimensions of rock wool and slag wool pipe insulation.
Moreover, the standard classifies mineral fiber pipe insulation into types based on maximum use temperature, including Type I (up to 450°C), Type II (up to 650°C), Type III (up to 850°C), Type IV (up to 650°C), and Type V (up to 850°C).
Therefore, TARCO Industry tests its rock wool pipe insulation for odor emission, corrosiveness, non-fibrous content, maximum use temperature, thermal conductivity, water vapor sorption, flexibility, and surface burning characteristics per ASTM C547 requirements.
Specifically, our rock wool pipe insulation conforms to ASTM C547 Grade A for Type I, II, IV, and V across the full property suite, independently tested by SGS.
Standard ASTM C585 — Inner and Outer Diameters of Rigid Thermal Insulation
Specifically, ASTM C585 covers the standard practice for inner and outer diameters of rigid thermal insulation for nominal pipe sizes.
Moreover, TARCO Industry manufactures its rock wool pipe sections in accordance with ASTM C585 dimensional requirements to ensure accurate fit over standard pipe sizes.
Standard ASTM C411 — Hot-Surface Performance of High-Temperature Insulation
In addition, ASTM C411 covers the test method for hot-surface performance of high-temperature thermal insulation.
Furthermore, TARCO Industry tests its rock wool pipe insulation to ASTM C411 to verify maximum use temperature and thermal stability.
Specifically, our rock wool pipe sections achieve a maximum service temperature of 650°C at 120 kg/m³ and above.
Standard ASTM C692 & ASTM C871 — Stress Corrosion and Chloride Content
Additionally, ASTM C692 covers the test method for evaluating the influence of thermal insulation on external stress corrosion cracking of austenitic stainless steel.
Moreover, ASTM C871 covers the test methods for chemical analysis of thermal insulation materials for leachable chloride, fluoride, silicate, and sodium ions.
Consequently, TARCO Industry rock wool pipe insulation passes the ASTM C795/C692 stress-corrosion drip test over Type 304 stainless steel, with leachable chloride content ≤ 10 ppm.
AUSTRALIA / NEW ZEALAND AS/NZS 4859.1:2018 — Thermal Insulation Materials for Buildings
Furthermore, AS/NZS 4859.1:2018 establishes the joint Australian/New Zealand Standard that sets out general criteria, technical provisions, and methods of test for materials used for thermal insulation within buildings.
Additionally, the Joint Technical Committee BD-058 (Thermal Insulation) prepared the standard and published it on 19 November 2018.
Therefore, products compliant with this standard demonstrate conformity with the National Construction Code (NCC).
Consequently, TARCO Industry tests its rock wool pipe insulation for thermal conductivity, R-value determination, and fire hazard properties in accordance with AS/NZS 4859.1 at 23°C.
Standard AS 1530.1 — Combustibility Test for Materials
Specifically, AS 1530.1 represents the Australian Standard fire test method for determining the non-combustibility of building materials.
Moreover, TARCO Industry classifies its rock wool pipe insulation as non-combustible under AS 1530.1.
Therefore, the product meets the non-combustible requirements of NCC 2022 Volume 1 C2D10(1).
EUROPE EN 14303:2015 — Thermal Insulation Products for Building Equipment and Industrial Installations
Furthermore, EN 14303 is the harmonized European Standard that specifies requirements for factory-made mineral wool (MW) thermal insulation products for building equipment and industrial installations.
Additionally, this standard covers pipe insulation, pipe sections, and pipe shells for operating temperatures up to 650°C.
Moreover, TARCO Industry rock wool pipe insulation complies with EN 14303:2015, with declared thermal conductivity values (λD) ranging from 0.033 to 0.049 W/m·K at 50°C.
Furthermore, the product is CE-labelled, which is the visual proof that it meets the standard for mineral wool — NS-EN 14303.
Regarding EN 13501-1:2018 & CPR (EU) No 305/2011
Consequently, EN 13501-1 represents the European Standard for the fire classification of construction products.
Therefore, under this standard, rock wool pipe insulation achieves Euroclass A1 (non-combustible, the highest possible rating).
Additionally, TARCO Industry provides full CE documentation and Declaration of Performance (DoP) for products supplied to European markets.
Standard EN 13468 & EN 13472 — Chloride Content and Water Absorption
Additionally, EN 13468 specifies the determination of trace quantities of water-soluble chloride ions, while EN 13472 specifies the determination of short-term water absorption by partial immersion.
Moreover, TARCO Industry rock wool pipe insulation achieves leachable chloride content ≤ 10 ppm per EN 13468 and water absorption ≤ 0.2 kg/m² per EN 13472.
CHINA GB/T 11835-2016 — Rock Wool, Slag Wool and Its Products for Thermal Insulation
In addition, GB/T 11835-2016 represents the primary Chinese national standard covering rock wool, slag wool, and their products for thermal insulation.
Specifically, it specifies terminology and definitions, classification and marking, requirements, test methods, inspection rules, marking, packaging, transportation, and storage.
Moreover, this standard applies to rock wool and slag wool products used on equipment and pipelines, including blankets, boards, and pipe sections.
Therefore, TARCO Industry manufactures rock wool pipe insulation in full compliance with GB/T 11835-2016, with thermal conductivity tested in accordance with GB/T 10294 and GB/T 10296.
JAPAN JIS A 9504:2024 — Man-Made Mineral Fibre Thermal Insulation Materials
Additionally, JIS A 9504:2024 specifies requirements for thermal insulation materials used in industrial installations and building air-conditioning systems.
Moreover, it covers rock wool pipe insulation, board, blanket, felt, and wave insulation.
Consequently, TARCO Industry’s rock wool pipe and rock wool tube products conform to JIS A 9504 requirements for density, thermal conductivity, fiber diameter, shot content, and formaldehyde emission characteristics.
Standard Sizes & Customization of Rock Wool Pipe Insulation
Furthermore, TARCO Industry offers a comprehensive range of standard sizes for rock wool pipe and rock wool tube products.
Additionally, we provide custom dimensions, densities, and facings upon request. The standard size chart below shows the typical density-thickness combinations available.
| Density (kg/m³) | Inner Diameter (mm) | Thickness (mm) | Length (mm) | Typical Application |
|---|---|---|---|---|
| 40 – 60 | 22 – 1220 | 25 – 50 | 1000 | HVAC pipe insulation, cold/hot water lines |
| 60 – 80 | 22 – 1220 | 30 – 80 | 1000 | Hot water pipes, low-pressure steam |
| 80 – 100 | 22 – 1220 | 40 – 100 | 1000 | Medium-pressure steam, process piping |
| 100 – 120 | 22 – 1220 | 50 – 150 | 1000 | High-pressure steam, boiler connections |
| 120 – 150 | 22 – 1220 | 50 – 200 | 1000 | Heavy-duty industrial, high-temperature |
| 150 – 200 | 22 – 1220 | 50 – 200 | 1000 | Severe conditions, high mechanical load |
Available Facings for Rock Wool Pipe Insulation
Furthermore, we offer various facings to meet different application requirements.
Specifically, the Unfaced option provides a standard bare rock wool pipe section for general thermal insulation.
Additionally, the Aluminum Foil (FSK) facing offers a reflective vapor barrier for HVAC and ducting applications.
Moreover, Galvanized Wire Mesh (GI) provides mechanical reinforcement for high-temperature industrial applications subject to vibration.
Consequently, Stainless Steel Wire Mesh (SS304) offers superior corrosion resistance for petrochemical, geothermal, and marine installations.
Finally, Glass Cloth facing provides a smooth protective surface for specific industrial applications.
Applications of Rock Wool Pipe Insulation / Rock Wool Tube
Furthermore, this product is widely used in steam pipe insulation for high-temperature steam distribution lines, particularly in power plants and district heating systems.
Additionally, it is ideal for hot water pipe insulation, specifically for commercial and residential heating systems.
Moreover, it serves boiler and tank insulation for power generation, dairy, food processing, and petrochemical facilities.
Consequently, it is utilized for industrial process piping in refineries, chemical plants, and manufacturing facilities.
Therefore, it is applied in HVAC pipe insulation for chilled water and hot water lines in commercial buildings.
In addition, it is used in District Heating and Cooling networks for efficient thermal distribution.
Finally, it is applied in Marine and Offshore piping systems where fire safety and corrosion resistance are critical.
Packaging & Delivery
Furthermore, our packaging utilizes polyethylene heat-shrinkable film or cartons for efficient handling, transport, and storage.
Additionally, a 40HQ container can hold approximately 1,800 – 2,500 m² depending on thickness and density.
Moreover, the lead time is 7 – 15 days after deposit.
Consequently, the port of loading is Tianjin, Qingdao, or Shanghai, China.
Why Choose TARCO Industry as Your Rock Wool Pipe Insulation Supplier
Furthermore, TARCO Industry is a professional rock wool pipe insulation manufacturer with full production capabilities, which means no middlemen and competitive pricing.
Additionally, our products are certified to ASTM C547, EN 14303, AS/NZS 4859.1, GB/T 11835-2016, and JIS A 9504 for global market access.
Moreover, we provide OEM/ODM services for density, thickness, dimensions, facing, and packaging.
Consequently, our production is ISO 9001-certified with batch testing and third-party inspection support.
Therefore, we serve customers in North America, Europe, Australia, New Zealand, Southeast Asia, the Middle East, and Oceania.
Finally, we offer short lead times and efficient logistics from major Chinese ports.
Frequently Asked Questions (FAQ)
What is rock wool pipe insulation and where is it used?
Furthermore, rock wool pipe insulation is a preformed pipe covering made from molten basalt rock and blast furnace slag, specifically designed for thermal insulation of high-temperature piping. Therefore, it is commonly used for steam pipes, hot water lines, process piping, and industrial equipment.
What is the maximum temperature resistance of rock wool pipe insulation?
Moreover, rock wool pipe insulation has a melting point exceeding 1000°C. Consequently, the maximum service temperature is 650°C, depending on density and application conditions.
Is rock wool pipe insulation fire resistant?
Yes. Rock wool pipe insulation is inherently non-combustible and achieves Euroclass A1 fire classification per EN 13501-1, the highest possible fire rating. Therefore, it contributes no fuel to a fire and has a Flame Spread Index (FSI) of 0 and Smoke Developed Index (SDI) of 0 per ASTM E84.
Do your products comply with Australian and New Zealand standards?
Additionally, we test TARCO Industry rock wool pipe insulation in accordance with AS/NZS 4859.1:2018 for thermal performance, AS 1530.1 for non-combustibility, and AS/NZS 1530.3 for fire hazard properties.
Are your products certified for the European market?
Furthermore, our rock wool pipe insulation complies with EN 14303:2015 under the Construction Products Regulation (EU) No 305/2011. Additionally, the product is CE-labelled and Euroclass A1 certified.
Can you provide samples before bulk order?
In addition, TARCO Industry offers free samples of rock wool pipe insulation for quality evaluation. Please contact our sales team for sample arrangements.
