Preformed nitrile rubber tubes
Flexible closed-cell sleeves for compatible air-conditioning and refrigeration copper pipe sizes.
Review selection details →Product overview
Nitrile rubber insulation for AC copper pipes
S.K. Metal supplies nitrile rubber for air conditioner installations where flexible closed-cell insulation is specified for compatible copper refrigerant lines.
Nitrile rubber insulation is valued for its flexible cellular structure and resistance to moisture ingress when joints, seams and terminations are correctly sealed. Product selection should consider pipe OD, insulation thickness, thermal conductivity, water-vapour performance, temperature limits, fire classification, outdoor protection and the approved project specification.
See what to include in your nitrile rubber enquiry
Material options
Choose nitrile rubber for air conditioner applications
Match the bore to the copper pipe outside diameter, then verify thickness, performance classification and exposure conditions.
Class 0 nitrile rubber
An option for projects requesting a defined fire-performance classification and supporting documentation.
Check document availability →Class 1 nitrile rubber
A classification option that must be confirmed against the governing test method and project requirement.
Discuss your specification →AC refrigerant-line sleeves
Insulation sleeves sized for compatible suction and liquid copper lines in split, packaged and VRF systems.
View VRV and VRF tubes →Thick-wall nitrile insulation
Greater wall thicknesses where the design calculation calls for improved condensation control or thermal resistance.
Request available thicknesses →Nitrile rubber sheets
Sheet-format insulation may be considered for larger surfaces, fittings or equipment where a tube format is unsuitable.
Check format availability →Specification guide
How to specify nitrile rubber insulation
A complete enquiry helps confirm whether the nitrile rubber fits the pipe and suits the intended operating and installation conditions.
- Pipe outside diameter
- State the exact copper tube OD so the insulation bore can be matched without excessive compression or gaps.
- Wall thickness
- Specify the required insulation thickness in millimetres or inches; do not select thickness from pipe size alone.
- Material
- Confirm the required closed-cell nitrile rubber formulation, approved make or project material specification.
- Classification
- State any required Class 0, Class 1, smoke, flame-spread or other test classification and the governing standard.
- Service temperature
- Provide the refrigerant-line operating temperature and expected ambient temperature range.
- Environment
- Identify indoor, outdoor, concealed, exposed, humid or corrosive conditions and any UV or weather protection requirement.
- Quantity & delivery
- Provide required length or carton quantity, pipe-size schedule, delivery city and requested date.
Important: Nitrile rubber thickness must be selected from a condensation-control and thermal calculation for the actual operating conditions. Confirm dimensions, classifications, temperature limits and installation requirements in the approved technical data.
Applications
Where nitrile rubber AC insulation is used
The correct product and thickness depend on refrigerant temperature, ambient humidity, pipe size and installation exposure.
Split air conditioners
Insulation around suction and liquid copper lines connecting indoor and outdoor AC units.
VRV and VRF systems
Continuous insulation for refrigerant distribution lines, branches and equipment connections.
Commercial HVAC
Insulated refrigerant pipework serving offices, hotels, hospitals, retail spaces and institutional buildings.
Refrigeration systems
Thermal and condensation-control insulation for compatible cold piping in refrigeration installations.
Chilled service pipework
Selected closed-cell insulation for compatible cold lines where the specified temperature range permits its use.
Maintenance and replacement
Replacement of damaged or deteriorated insulation after pipe condition and system requirements are checked.
Quality and documentation
Check nitrile rubber performance data
Ask for technical data applicable to the exact nitrile rubber grade and thickness being quoted. Design teams can also consult the current ASHRAE standards and guidelines relevant to their HVAC project.
Discuss your insulation requirement →- Internal diameter and wall-thickness confirmation
- Thermal conductivity data at stated test temperatures
- Water-vapour and moisture-resistance information where required
- Fire and smoke classification documents specified by the project
- Temperature range, storage and installation instructions
Ordering checklist
How to order nitrile rubber for air conditioner projects
Send a pipe and nitrile-rubber insulation schedule when several refrigerant-line sizes or thicknesses are required.
State every pipe size
Provide the outside diameter of each copper refrigerant tube requiring insulation.
Specify insulation thickness
List the calculated or project-specified wall thickness for every pipe size.
Define material requirements
Include material type, classification, temperature range and any approved-make requirements.
Describe installation conditions
State operating temperature, ambient conditions and whether the installation is indoor, outdoor, concealed or exposed.
Confirm quantity and delivery
Include required length or cartons, delivery location, schedule and documentation requirements.
Frequently asked questions
Nitrile rubber for air conditioner FAQs
What does nitrile rubber AC insulation do?
It limits heat transfer between the refrigerant line and surrounding air and helps prevent surface condensation when correctly selected, sealed and installed.
How do I choose the correct insulation bore?
Match the insulation internal diameter to the copper tube outside diameter. The sleeve should fit properly without open gaps or excessive compression.
What insulation thickness should I use?
Thickness depends on pipe temperature, ambient temperature, relative humidity, pipe diameter, thermal conductivity and exposure. Use the project calculation or specification rather than a universal thickness.
Is nitrile rubber suitable for air-conditioner pipes?
Closed-cell nitrile rubber is commonly used for HVAC and refrigeration piping. Confirm its temperature range, fire classification, vapour performance and compatibility with the project conditions.
Can AC pipe insulation be installed outdoors?
Only with the weather, UV and mechanical protection required by the insulation manufacturer and project specification. Seal joints and penetrations to maintain vapour-control continuity.
Which details are required for a quotation?
Provide copper tube OD, insulation thickness, material or classification, total quantity, operating and ambient conditions, delivery location and required documentation.
Request a quotation
Send your nitrile rubber insulation schedule
Include every copper tube OD, required nitrile rubber thickness, quantity, application and delivery location. S.K. Metal will review availability and the applicable technical details.
Send your requirement