Pipework Insulation Contractors

As steam pipe insulation contractors we insulate HP and LP steam mains, condensate returns and heated process lines, usually with mineral wool sections or mattresses from 30 to 90mm thick depending on operating temperature, finished in Aluzinc or aluminium cladding. The insulation does two jobs on these lines: it cuts heat loss, and it brings the surface down to a temperature that is safe for anyone working nearby.

On a high-pressure steam main we installed 90mm mineral wool under Aluzinc cladding, with fabricated Aluzinc boxes at the valves and flanges so the fittings are protected to the same standard as the straight runs. At the Worksop carbon-capture plant, mineral wool on the steam and condensate lines sat alongside two other materials chosen for the CO₂ and hot-oil circuits.

We insulate LTHW and HTHW flow and return pipework, domestic hot water and plant room services in hospitals, universities, schools and commercial buildings. As commercial pipe insulation contractors we often work in occupied buildings and finished plant rooms, where neat terminations, straight cladding lines and a clear site matter to the client as much as thermal performance.

Phenolic and mineral wool are the usual materials, finished in foil, PIB or plain aluminium depending on exposure and appearance; plain aluminium gives the bright finish most plant rooms are specified with.

On chilled water and cold process lines the risk is condensation rather than heat loss. A single break in the vapour barrier lets moist air reach the cold pipe, and the insulation then loses performance, drips and can corrode the pipe beneath it, often out of sight behind cladding that still looks sound.

We use closed-cell EPDM/nitrile elastomeric foam and phenolic with sealed joints, and vapour-seal every termination at valves, supports and hangers so the barrier stays continuous along the whole run. It is the same material system we specified for the CO₂ lines at Worksop.

Chemical dosing lines at water and wastewater treatment works are often small-bore or flexible, run outdoors and carry chemicals that thicken or crystallise in cold weather. Foam & Wrap™, our own insulation and trace heating system, was developed for exactly these lines and follows the long, flexible hose runs that rigid insulation cannot.

Beyond water, we insulate process pipework in chemical, food and drink, brewing and distilling plants, choosing material and finish for the duty and for washdown areas.

Material choice follows the operating temperature, the condensation risk, fire performance, the space available and whether the line is internal or exposed. Mineral and stone wool (Rockwool, Paroc) covers the widest temperature range and is our default for hot services; phenolic gives high thermal performance in a thinner wall; EPDM/nitrile suits chilled and CO₂ lines; and cellular glass is used on hot oil and wherever moisture must be excluded. Where pipe spacing is tight, as at Kuraray’s Chemviron site in Durham, we switch to a higher-performance material to achieve the same thermal resistance in a thinner section.

Thickness is specified to BS 5422:2023 and BS EN ISO 12241, and installation follows BS 5970. Where the client specification sets thicknesses we work to it; where it does not, we specify to the standard and select material on price and performance.

Many process and external lines need heat as well as insulation, and the two have to be designed together: the insulation thickness sets the heat loss the trace heating must replace, and every circuit has to be tested before it is covered. We design, install, test and commission self-regulating, constant wattage and mineral-insulated systems, then insulate and clad over them in the same programme, so the whole line has one contract manager and one set of handover documents.

On Billian UK’s bitumen line in Sheffield, mineral-insulated trace heating under mineral wool and Aluzinc cladding holds the product at a constant 160°C. At Kuraray’s Chemviron site, self-regulating trace heating under mineral wool keeps dosing tanks and pipework at +5°C with the ambient at –10°C. See trace heating installation for system types, or project packages for turnkey scopes that combine insulation, heat tracing and jackets.