Your questions, our answers
You want to know more about ISOPLUS and our products and services? You will find our answers to your questions here.
Topic: General questions
You can use our online contact form to report technical problems or contact our customer service in your country directly by e-mail or phone. Please give a detailed description of the problem so that we can help you as quickly as possible.
Vacancies at ISOPLUS are published on our careers page. You will also find information about our application process and career opptounities.
We offer factory tours by prior arrangement. Please contact the customer service in your country to arrange a date.
ISOPLUS actively champions sustainability and takes various measures to reduce our carbon footprint. They include use of environmentally friendly materials and energy-efficient production processes. Further information can be found on our website under "Sustainability".
You can reach our customer service by phone or e-mail. Further information can be found under the contact heading on our website.
The payment terms can vary depending on the country. For specific information on the payment terms in your country, please contact our sales department.
Yes, we value your feedback. It gives us an opportunity to improve. You can use our online contact form to send us feedback or contact our customer service directly by e-mail or phone.
A newsletter is currently not offered in every country. You can subscribe to the newsletter by entering your e-mail address in the corresponding "Newsletter" field on our website. You will then receive regular up-to-date information about our products, projects and events.
An overview of the ISOPLUS production locations can be found on our website, under Locations.
We have many of our standard products in stock. Please contact the customer service in your country to receive information on product availability.
You can find our invoice address on our website and on all our documents.
Our general terms and conditions of sale and warranty can be found on our website under Terms and conditions.
The price depends on various factors such as the raw material prices. Market developments can occur very quickly and therefore cannot be fixed to a standard.
The price depends on various factors such as the raw material prices. Please contact the customer service in your country to discuss the individual terms and conditions, which depend on the number of enquiries and frequency of cooperation.
According to EN 253, each product delivery with a steel component must be provided with a type 3.1 material certificate. The corresponding certificate is automatically produced by ISOPLUS and is provided with the delivery.
To confirm the quality, we have necessary product certificates and corresponding EHP and ISO certificates.
An overview of the ISOPLUS sales partners can be found on our website under Locations.
In most countries, bank transfer is the most frequently used method of payment. In several locations you can also pay by credit card or cash. Please note that the maximum for cash payments is stipulated by the laws in the respective country. Please contact the customer service in your country to find the optimum payment method.
Topic: Rigid pipe systems
The quantity of expansion pads depends on various conditions from the outside diameter of the pipe, the type of fittings and the operating parameters. Expansion pad plans are produced according to the pipe structural calculations. Contact our engineering departments or the project designer for assistance. Without a structural check, our pipe system loses its warranty.
Laying and welding the pipes on site is generally carried out by certified pipe laying contractors with the appropriate technical qualifications.
The trench width and depth must always be matched to the respective pipe dimensions. The trench bedding should be flat and stone-free, have sidefill protection and provide water and silt-free laying zones for the whole construction period. More detailed explanations can be found in our catalogue or from your contract manager on site.
The pre-insulated pipe should be embedded in at least 10 cm of sand all round - important: the sand must be stone-free! Any pipe supports such as squared timbers must be removed before backfilling, pipe chocks can remain in the trench. Note the grading curve of the sand grading range 0 - 4 mm (class NS 0/2) to be used. Information on the backfilling requirements can be found in our catalogue.
Use stone-free, noncohesive, compactable material that you place in layers. Note the grading curve of the sand grading range 0 - 4 mm (class NS 0/2) to be used. Information on the backfilling requirements can be found in our catalogue.
Our standard lengths for pre-insulated pipes are 6, 12 and 16 metres. Within the range from DN25 to DN80, production is only possible in 6 and 12 m lengths.
The minimum life at an operating temperature of 120 °C is 30 years. At temperatures <115 °C, a service life of over 50 years can be assumed. (Based on EN 13941:2022).
Continuous operating temperature 120 °C, peak temperature 140 °C for max. 300 h/a. For specific information, please contact our customer service in your country.
Pre-insulated ISOPLUS pipes provide outstanding thermal efficiency, low heat losses, corrosion resistance and durability. Our products are designed to meet the highest performance and reliability standards.
The soil temperature in the area surrounding the pre-insulated pipes depends on various conditions, such as the medium temperature, the soil profile, the soil conditions and the insulation series. Further information is available from our engineering department.
Pre-insulated ISOPLUS pipes can be individually adapted to the particular requirements of your project. We offer adaptation options for the insulation series, casing and pipe dimensions. For specific information, please contact the engineering department in your country.
ISOPLUS pre-insulated pipe systems are manufactured to international standards. We work to the requirements of ISO 9001 and ISO 14001 and our products comply with the EN 13941 standards and the AGFW regulations. All our certificates are available to look through on the “Quality” page. You will also find certificates to download on our download page.
ISOPLUS offers technical support for your projects with insulated pipes. Our team of experts can advise you in the choice of product and optimum technical implementation. For specific information, please contact the engineering department or the customer service in your country.
Information on the bending radius can be found in our product catalogue, which you can download in various languages from our download page. For individual enquiries, please contact our customer service in your country.
Information on the different variants can be found in our product catalogue, which you can download in various languages from our download page.
Depending on the pipe dimensions and the insulation series, the heat loss when using twin pipes can be reduced by up to 40% compared to single pipes. Please contact the customer service in your country for optimum solutions.
We recycle plastic in our own production. We also offer the isonext concept. isonext is a certification system, which ensures the manufacturing or plastics from plant-based raw materials.
Our product range includes various material combinations, so it is not possible to give a general answer. For product-specific information, please contact our customer service in your country.
Our product range includes various material combinations, so it is not possible to give a general answer. Depending on the pipe type and diameter, all the relevant data can be found in the ISOPLUS catalogue, which is available in various languages on the download page.
We are able to insulate valves depending on the individual, manufacturer-specific type. For further information, please contact the customer service in your country.
We offer twin pipes as curved pipes from nominal size DN50+50/200 to DN200+200/710. The maximum allowable angles and minimum bending radii for the single pipes can be found in our product catalogue, which is available in various languages in the download center.
Our range also includes other necessary products. We supply our customers, among other things, with joints, assembly components, seals and tailored leak detection. For flexible pipes, for example, we offer the necessary joints, shells for bends and T-pieces and end caps. For further individual enquiries, please contact our customer service in your country.
The end cap is needed to separate off our foam system at the changeover to the uninsulated area. Further information on end caps can be found in our product catalogue, which you can download in various languages from our download page.
Information on correct handling and storage can be found in our product catalogue, which you can download in various languages from our download page.
Topic: Flexible pipe systems
When laying flexible pipes at temperatures around or below + 5°C, we recommend storing the pipe in a heated room and/or heating the pipe with hot air or the low flame of a gas burner to make straightening it easier. Avoid bending the flexible pipe against the direction in which it is wound on.
Thanks to the modular structure, the pipes can be laid without significant prior knowledge of pipe layers or infrastructure construction workers. Decoilers and tools for installing press couplings can be provided by ISOPLUS for a small rental charge. Please contact the customer service in your country for further information.
Yes, it is possible. Technical clarification is absolutely necessary for choosing the right connection technology and for compatibility. Please contact the customer service in your country for specific information.
Yes, a special tool is required for the installation of the press fittings. In most cases, this can be hired for a charge. Please contact the customer service in your country or the sales representative responsible for your area.
Depending on the nominal size, from 360m (Ø25) - up to 75m (Ø140).
All possible options can be found in our product catalogue on the download page.
In practice, a heating network is operated in a so-called load collective with changing flow and return temperatures T1 to Tn. The resulting service life of the PE-Xa carrier pipe can then be determined using the "Miner's rule" in ISO 13760. Further information can be found in our product catalogue.
Continuous operating temperature 80 °C in accordance with EN 15632-2, short-term peak temperature 95 °C according to EN 15632-2, maximum allowable operating pressure pB: 6/10 bar.
See table. The minimum requirements to DIN 16892/93 (dated 2019) and the more stringent requirements to EN 15632 (dated 2015) are therefore fully met. The allowable operating pressure is based on a safety factor. Appropriate reference measurements are taken regularly by external test institutes and the creep rupture strength is confirmed.
Pre-insulated ISOPLUS pipes provide outstanding thermal efficiency, low heat losses, corrosion resistance and durability. Our products are designed to meet the highest performance and reliability standards.
The soil temperature in the area surrounding the pre-insulated pipes depends on various conditions, such as the medium temperature, the soil profile, the soil conditions and the insulation series. Further information is available from our engineering department.
Pre-insulated ISOPLUS pipes can be individually adapted to the particular requirements of your project. We offer adaptation options for the insulation series, casing and pipe dimensions. For specific information, please contact the engineering department in your country.
ISOPLUS pre-insulated pipe systems are manufactured to international standards. We work to the requirements of ISO 9001 and ISO 14001 and our products comply with the EN 13941 standards and the AGFW regulations. All our certificates are available to look through on the “Quality” page. You will also find certificates to download in our download center.
ISOPLUS offers technical support for your projects with insulated pipes. Our team of experts can advise you in the choice of product and optimum technical implementation. For specific information, please contact the engineering department or the customer service in your country.
The unwinder helps to unwind the pipe and makes laying in the trench easier. Further information can be found in the instructions for use in our download center. For specific information, please contact the customer service in your country or your sales representative contact.
In most cases, it is possible to connect the pipe systems with the help of adapters, so that you can easily switch to ISOPLUS. Please contact the customer service in your country for specific information.
We recycle plastic in our own production. We also offer the isonext concept. isonext is a certification system, which ensures the manufacturing or plastics from plant-based raw materials.
Our product range includes various material combinations, so it is not possible to give a general answer. For product-specific information, please contact our customer service in your country.
Our range also includes other necessary products. We supply our customers, among other things, with joints, assembly components, seals and tailored leak detection. For flexible pipes, for example, we offer the necessary joints, shells for bends and T-pieces and end caps. For further individual enquiries, please contact our customer service in your country.
The end cap is needed to separate off our foam system at the changeover to the uninsulated area. Further information on end caps can be found in our product catalogue, which you can download in various languages in our download center.
Topic: Joint systems
ISOPLUS offers all kinds of different joint systems for various applications. These are determined, for example, by geological circumstances (e.g. ground water) and the purpose or operating parameters of the pipe system. If you need assistance in choosing the optimum joint system, contact our engineering department or the sales representative for your area.
The installation of joints in rainy weather should be avoided. If unavoidable an enclosure/weather protection must be created to ensure dry conditions for the installation.
If a joint installation fails, the inferior joint must be removed and replaced with a repair joint.
It must be ensured that the pipes and fittings are dry and free from dirt before the joint installation. In addition, at least 20mm is always removed from the foam body at the transitions, in order to remove any moisture that has penetrated and to achieve proper bonding.
Yes, it is possible to shorten a joint. Precise information is provided in the respective installation instructions or from our technical department.
Make sure there is sufficient space to move in the area of bends, expansion pads and joints. More detailed installation can be found in our manual under “Laying guidelines” or ask the site manager responsible for your project.
All connection coupler systems for pre-sinsulated pipe systems are made of extruded high-density polyethylene (PEHD). The crosslinked PEHD and thus the crosslinked isojoint joint systems are produced in a downstream process.
We always recommend installing a leak detection device, as early detection of moisture (defective weld, mechanical damage from the outside, etc.) avoids additional lifecycle costs in the pipe system. Different equipment is used depending on the region.
ISOPLUS offers all kinds of different joint systems for various applications. Double-sealing joints (shrink joint, crosslinked isojoint joints with additional outer shrink collar) and (PE-welded) welding sleeves are recommended in the ground water zone. If you need assistance in choosing the optimum joint system, contact our engineering department or the sales representative for your area.
The time needed depends on the size and ambient factors of the pipe connections. We always make every effort to make sure that we do not cause delays for subsequent trades.
Detailed information on the storage and handling of our joint foam, alongside other information, can be found here.
The foam temperature has been agreed with the foam manufacturer for our products. In addition, application parameters were defined in-house, which must be complied with when foaming. Detailed information can be found here.
Our foam is a rigid polyurethane foam system. It is made up of isocyanate and polyol. The physical propellant from the pentane group is added to the polyol.
Due to the crosslinking process, these joints have improved mechanical properties and a permanently higher shrinking force. The crosslinked connection coupler systems therefore do not require an additional outer sleeve.
We use irradiation crosslinking for isojoint joints. High-energy radiation (electron-ß radiation) splits the carbon-hydrogen bonds causing radical reactive sites (active centres) to be formed in the polymer chain. The electrons are able to split hydrogen atoms out of the polyethylene molecule and therefore create reactive sites on the carbon atoms – so-called radicals. If two reactive sites created in this way are located near to each other, the carbon atoms joint together and form so-called crosslinking bridges. For the crosslinking, the joint body is passed through an electron beam. This creates a uniformly crosslinked joint body, which is now named "PE-Xc". The "X" stands for “crosslinking”, the "c" denotes the physical method.
Delivery of joints without foam components is possible, of course. For individual enquiries, please contact our customer service in your country.
The shrink sleeve is a double-sealing joint system, which is also suitable for use in the ground water zone. Further information on shrink sleeves can be found in our product catalogue, which you can download from the download page.
We offer this service in several countries. Please contact the customer service in your country for specific information.
Detailed information on the storage and handling of our joint foam, alongside other information, can be found here.
We offer this service in several countries. Please contact the customer service in your country for specific information.
Topic: Leak detection
It is always possible to use several detection systems in one pipe system. These can consist of two (or more) measuring circuits of one type or a combination of different types.
The two systems most frequently used are the Nordic system (IPS) and the NiCr system of Brandes.
Frequently used systems such as the Nordic system are part of our standard repertoire. For specific information, please contact our customer service in your country.
ISOPLUS solely recommends use of spacers for the installation of detection wires in the joints.
Depending on the detection system monitored lengths up to 5,000m are possible. Please contact the customer service in your country for specific information.
Before the handover, we take a check measurement and create a measurement record, which we issue to the customer.
We always recommend installing a leak detection device, as early detection of moisture (defective weld, mechanical damage from the outside, etc.) avoids additional lifecycle costs in the pipe system. Different equipment is used depending on the region.
Information about our monitoring devices can be found in our product catalogue, which you can download in various languages from our download page.
The fault measurement is used to localised penetrating moisture in the foam system. This can be done using an ISOPLUS measuring device with an accuracy of ±1 metre.
Different types of signal wires exist depending on the leak detection system. They are used to detect and localised penetrating moisture in the insulation. Further information about leak detection can be found in our product catalogue, which you can download in various languages from our download page.
Topic: Delivery and shipping
The usual delivery period for products that we have in stock is 1-2 weeks. The delivery period for customised products depends on the time required to procure the primary materials. For specific information, please contact our customer service in your country.
This depends on the quantity of your order and the delivery location. For specific information, please contact our customer service in your country.
This is possible in principle. For specific information, please contact our customer service in your country. HVO stands for hydrated vegetable oil. Despite its name, HVO can be produced both from vegetable oils and from animal fats. The raw materials are treated with hydrogen gas and catalysts under high pressure and at hight temperatures. Hydrocarbons are produced, which are similar to those in diesel fuel.
HVO is renewable diesel and not biodiesel, for which it is sometimes mistaken. The difference lies in the chemical composition and HVO is very similar to normal diesel so that it can be replaced by normal diesel or blended with it.
ISOPLUS generally delivers on all weekdays by arrangement, but in several of our locations there are restrictions. For specific information, please contact our customer service in your country.
ISOPLUS has the largest warehouses by far in the industry. If you have any specific questions about storage, please contact our customer service in your country.
It is possible to return goods but only the standard product range, not customised products. For specific information on returning goods, please contact our customer service in your country.
We are prepared to deliver all possible units as far as possible. For specific information, please contact our customer service in your country.
It is possible to postpone at short notice in most cases. However, costs could be incurred for storage of the materials produced or for cancellation costs of our logistics partners.
In most locations it is possible to pick up the goods. For specific information, please contact our customer service in your country.
In this case, it could be an error in the factory. For specific information, please contact our customer service in your country.
To avoid waiting times when loading, it is best to contact the person responsible for the order and arrange a specific time for the pick up. For the general opening times of our production and warehouse locations, please contact our customer service in your country.
Topic: Engineering
Our engineering department offers a wide range of technical support for your construction project. This includes, for example, component drawings, structural calculations and loop plans. These are generally made available to you after you have placed the order. It is possible to produce drawings and provide technical support, etc. during the design phase. To do so, contact the customer service or the sales representative responsible for your area.
Topic: Catalogue
You can download our product catalogue in different languages in our download center.
You can download the tables in different languages in our download center.
All our certificates are available to look through on the “Quality” page. Our certificates are also available to download in our download center.
Topic: Service and help
We offer this service in several countries. Please contact the customer service in your country for specific information.
We offer various forms of this service in several countries. It is possible to hire, for example, pressing tools for fittings of the flexible pipe systems, welding computer for welding sleeves and completely equipped trailers with everything you need. Please contact the customer service in your country to check the availability of tools.
We are always pleased to attend to the individual wishes of our customers. In many locations, we have cooperations with logistics companies, which are able to unload your order in almost any place.
For individual static calculations, please contact the customer service in your country.
We have developed isoCalc, a program with which you can calculate dimensions, heat loss, expansion and much more. It is free of charge and can help you to make the right decisions.
isoCalc, our digital tools program can help you to calculate dimensions, heat losses, expansion and much more. It is completely free of charge and can help you to make the right decisions. You only need to register.
If you need help with the calculations, please contact our customer service in your country.
In many countries, ISOPLUS can carry out pipe static analyses using the sisKMR calculation program and other tools, and produce relevant verifications that meet the requirements of EN 13941 and the AGFW good practice guide FW401. If you have any questions about calculations, please contact the customer service in your country.
Please contact the customer service in your country to get specific information about construction advice and static calculations software.
Our regional sales managers await your call to arrange an appointment. Please contact the customer service in your country for specific information.
Our expertise lies in manufacturing the individual components, ISOPLUS therefore does not have its own pipe-laying team. However, we will be pleased to recommend professional construction companies and can also carry out the post insulation work on request. Please contact the customer service in your country for specific information.
Please contact the customer service in your country to obtain specific information.
Topic: Training
We already have set up the ISOPLUS Campus in several of our locations. It offers you tailored courses on installing joints and assembly components and on leak detection. Speak to the sales representative responsible for your region or contact our customer service for individual advice about our training and continued professional/vocational development options.
Training certificates are valid between 2-4 years.
Let us know if you have any questions.