Specify electrically traced, steam traced and pre-insulated tubing for freeze protection, temperature maintenance and reliable sample transport.
A small-bore line can be a critical part of your process. Freezing can interrupt flow, cooling can change fluid viscosity, and condensation can affect an analyser sample before it reaches the instrument.
Dekoron Unitherm tubing bundles combine the process tube, the specified heating arrangement, thermal insulation and a protective outer jacket in a factory-built assembly. PMA supplies the range and helps you review the conditions that determine the right construction.
Start with what the line must do: prevent freezing, maintain a defined temperature, carry steam or condensate, or transport an analytical sample. Then match the tubing, tracing and installation details to that duty.
Heat tracing adds energy to the line. Pre-insulation reduces heat loss. Choose the combination around the fluid, the available utilities and the temperature you need to maintain.
An electric heater runs alongside the process tube within the insulated bundle. Use it for freeze protection or temperature maintenance where an electrical supply suits the installation.
Heater options include self-regulating and higher-temperature designs. Specify the required duty before selecting the heater and control arrangement.
A steam tracer transfers heat to the process tube. It is an option for temperature or viscosity maintenance where a suitable steam supply and condensate return are available.
The cabled construction keeps the tubes together for consistent heat transfer and allows bends in different planes.
Insulated transport tubing carries steam, gas or liquid without an integral electric heater. Series 2200 is used for steam distribution and condensate return, including refinery and petrochemical duties.
A continuous outer jacket protects the insulation. Insulation alone cannot guarantee freeze protection during a prolonged shutdown.
Explore the manufacturer’s electric traced, steam traced and pre-insulated tubing information.
Specify the complete bundle together so the tubing, heater, insulation and jacket work as a system.
A defined construction provides repeatable insulation and component positioning along the line. It reduces the amount of tracing and insulation work that must be assembled on site.
The electric-traced range includes fibrous-glass and aerogel insulation options. Marmon describes aerogel designs as offering improved thermal efficiency and smaller outside diameters.
Cabled tubing constructions bend in multiple planes without twisting the bundle to make the bend. Select the jacket and installation arrangement for the environment and the required mechanical protection.
The following are published family options, rather than a single specification shared by every bundle. PMA will confirm the exact construction and ratings for your enquiry.
The electric-traced line card lists ¼, ⅜, ½ and ¾ inch sizes, plus 6, 10 and 12 mm. Common materials include 316/316L stainless steel, copper and PFA; availability depends on the product family.
Specify outside diameter, wall thickness, fluid compatibility and pressure requirements together.
Published maximum operating temperatures are 85°C for low-temperature self-regulating, 150°C for high-temperature self-regulating and 204°C for power-limiting designs.
These are family ratings, not guaranteed maintained temperatures for every ambient condition or line length.
Self-regulating electric bundles are listed with 1–4 tubes, subject to tube diameter and material. Options include replaceable-heater carrier-tube designs and multiple heating zones.
Tell us which tubes need heating and which auxiliary lines or connections are required.
A hot process or steam blowdown can expose a heater to conditions above its operating limit. Specialist buffered constructions separate the heater from the hot tube.
State normal, maximum and cleaning temperatures separately. A high exposure-temperature design is not a standard heater’s maintenance-temperature rating.
Technical basis: Dekoron Unitherm manufacturer line card and buffer-design application case study. Share the area classification and required certification with PMA so suitability can be checked for the supplied assembly.
The same tubing family can serve very different processes. Use these application starting points to describe your duty, then ask PMA to review the construction for your site.
Review instrument impulse lines, small-bore process lines and temperature-sensitive sample transport. Include steam supply and condensate return duties when planning the complete tracing system.
Match wetted materials to the fluid and maintain the temperature needed for transport. Include start-up, shutdown and cleaning conditions in the specification.
Plan steam sampling and instrument lines around both normal operation and hot-process exposure. Combined-cycle applications may need a buffered heater construction.
Heated CEMS sample lines help manage condensation between the sampling point and analyser. Define the gas composition, sample temperature, materials, line length and any calibration or blowback lines.
Assess exposed instrument and sample lines for winter conditions. Identify the shutdown scenario, required flow and available power before choosing freeze protection.
Discuss temperature-sensitive transfer and analytical duties, including compatibility, cleanliness and connection requirements. Confirm any hygienic or application-specific requirements for the exact product.
Manufacturer application context: tubing bundles. The water, food and pharmaceutical examples require an application review; suitability is not implied by the industry name.
Sending the operating conditions at the outset helps us review the correct tubing bundle and return a more useful quotation.
End seals, penetrations and any exposed sections need the correct treatment. Keep moisture out of the insulation and select compatible termination accessories for the bundle.
Review the electrical circuit, protection, temperature sensing and control together. For steam tracing, include supply conditions, drainage and condensate handling.
Follow the instructions for the supplied product and site procedures. Include appropriate tube-integrity, electrical and temperature checks, with access for future inspection.
Marmon’s 2026 case study describes high-temperature steam sample lines at a combined-cycle power plant. A buffered construction protected the electric heat trace from the hot process tubing while supporting the required sample-line duty.
The manufacturer reports 19% total installation cost savings in that project through a tailored bundle design, smaller outside diameters and reduced cable-tray requirements.
The lesson is to specify against actual operating conditions. These are manufacturer-reported results from one installation; the outcome for a new project depends on its design and site conditions.
Compare traced tubing, pre-insulated tubing, CEMS and heated-hose families in the manufacturer’s two-page line card.
Review the separate 2DT1 and 2DT2 steam-tracer product sheet. These pipe and vessel tracers have their own specification.
Explore the published combined-cycle power-plant example and the value of matching the bundle to process exposure.
Ask PMA for the datasheet, installation instructions, accessories and documentation relevant to your chosen construction.
It is a tubing assembly with an electric heater, thermal insulation and a protective jacket. The heater supplies heat to the process line for a specified freeze-protection or temperature-maintenance duty.
Insulation slows heat loss but does not generate heat. During a prolonged cold shutdown, an insulated line can still cool towards ambient temperature. Assess whether active heat tracing or another protection method is required.
Base the choice on the temperature duty, available utilities, route and operating routine. Electric tracing needs an appropriate circuit and control arrangement; steam tracing also needs a suitable supply and condensate return.
Self-regulation does not define the complete control strategy. The process temperature limits, heater selection and installation requirements determine the sensing and control arrangement. Specify these with PMA.
The range includes process and CEMS sample-line constructions. Select the tube material, temperature duty, sample flow and auxiliary lines around the analyser and sample conditions; an unsuitable transport line can change the sample before measurement.
Send the original part number or label if available, together with the line length, tube details, heating type and operating conditions. Include photographs and connection details so we can review the required replacement and accessories.
New project, replacement line or technical question: share the conditions and we’ll help you identify your next step.
Speak to the PMA team about your instruments, reagents or service requirements. Tell us what you need, and we’ll help you find the right next step.
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