Thermal insulation

Insulation plays a key role in many industrial processes, for both technical and economic reasons and it has an important function in increasing the energy efficiency of the plants.

In more than 80 years of activity, through the insulation of several petrochemical plants, chemical plants, refineries, conventional and nuclear power plants and LNG plants with cryogenic insulation, Riva & MARIANI group developed a strong know-how of all types of insulation materials and installation procedures and through highly specialized employees, ensure the reliability of the installation and the respect of the time schedule through flexibility and good organization. Thanks to its great knowledge, managed with sane entrepreneurial spirit, and with the capacity to adapting to the different market situation, Riva & MARIANI can propose the best Insulation system and installation in order to ensure the performance of the project.

Hot insulations

Hot insulation is required to avoid heat losses in pipes, tanks and equipment in high temperature service, to allow the maintenance of the operative temperature or for personal protection reasons. Historically the most used material for this type of insulation is rock wool, but there are also other materials, such as glass wool, ceramic fiber or calcium silicate, that even if less widely used are a valid alternative. All materials comply with the latest requirements regarding health and safety and remove all risks during installation and maintenance. Cellular glass (or FOAMGLAS), have unique characteristics of resistance to fire and low temperatures, and is used in ATEX areas, where fire protection is required. A new-generation material is Pyrogel, particularly suitable for insulation in areas with very reduced space. Another material used in air conditioning systems and in buildings, is polyurethane / polyisocyanurate foam, used where no powders can be produced during installation or maintenance or where fibrous materials are not allowed.

Cold Insulation

Cold insulation is required to minimize the absorption of heat from the outside.

This type of insulation is usually more complicated than the normal hot insulation, because we have to face the additional problem of moisture penetrates inside the insulation, which affect the insulating properties of the insulation material.

For this reasons, closed cells insulation materials such as PIR / PUR / FOAMGLAS / closed cells FEF are normally used and is usually foreseen the application of one or more vapor barriers.

Riva & Mariani through its specialized technician, certified EiiF (see specific description), covers both the design of insulation based on heat loss and the preparation of detailed drawings, for each item to be insulated.

Acoustic insulations

Beyond the typical interventions on piping, ducts and fans, executed in compliance with customer specifications, increasingly restrictive laws in the acoustic field in terms of protection of personnel and environment, imposed more attention to noise issues.

RIVA & MARIANI Group operates, through its subsidiary Coprel-Willich srl, in the field of acoustic insulation. In 1997 Coprel srl (Born 1976) merges with Willich Italy, and burn Coprel - Willich, 60% owned by the RIVA & MARIANI Group which completes the acquisition of 100% of the company in 2002.

Thanks to its experience and innovative technologies, Coprel-Willich find the optimal solution for any noise problem; service includes: acoustic surveys, engineering, design, manufacturing, assembly and final noise test. Typical activities are: personnel enclosures, machines enclosures (complete with all facilities), environmental treatments (coatings, baffles), shields including sound barriers and silencers. Moreover, Coprel-Willich srl realize compartments and fireproofing enclosures/boxes.

Coprel-Willich is certified ISO 9001/2015, is qualified SOA - category OS34, have its offices in the headquarters of RIVA & MARIANI Group S.p.A. and work in close contact with the parent company.

Per visionare il certificato di Gruppo ed attestazione SOA:

ISO 9001/2015 SOA Certification


Turbines insulation requires specific skills; insulation thicknesses must be properly calculated in order to guarantee a uniform heat loss over the entire insulated surface, needed to ensure the smooth operation of the machine. Insulation must be easily and quickly installed, removed and replaced in order to accelerate and facilitate the maintenance of the turbine. For this reasons, preassembled pillows made with glas fabric and filled with mineral wool and / or ceramic fibers are commonly used.

Prefabrication and installation techniques are really challenging and it’s very important to avoid heat loss between pillows joints, which may affect the accuracy of the thermal calculations and the operation of the turbine.