Our service

As flexible as our systems

Performance, reliability, service life: You demand a lot from your process heating system. And rightly so, as production downtime comes at a high cost. That’s why we ensure top-line quality for our service as well as our systems. We offer a wide range of individual services we can adapt in a modular fashion – from installation and legally required safety inspections, maintenance and oil analyses to training and system upgrades. Wherever your HTT process heating system is in operation: Our TÜV-certified technicians and service partners are here to help. Whenever you need them.
24/7 service hotline: Tel.: +49 5221 385-600 | service@htt.de

Spare parts service

Original parts in OEM quality

A secure spare parts supply increases your system availability. The members of our spare parts sales team are here to deal with your enquires swiftly and reliably. We will work with you to create your own custom spare parts package or an emergency kit for worst-case scenarios. Our qualified service technicians bring their years of experience as well as HTT-quality original spare parts that fit your system perfectly wherever possible. We keep downtime to a minimum with our technical support, extensive range in stock and spare parts service.   Simply request your spare parts via our contact form. Please note: You should state your system type and serial number and ideally attach photos of the type plate and part that needs replaced.

Installation and commissioning

Top-line technology, flawless installation

Only the smart integration of our system technology into your process gets the best from your new process heating system. Our specialist fitters organise your system installation in advance to ensure that the complete assembly process takes place swiftly on site. Our experienced technicians and engineering handle the commissioning process all the way through to employee training to ensure that production goes without a hitch. Are you planning to relocate your system to another site? Our technicians are here to help.

Operator obligations

Before commissioning and during operation

Anyone who commissions or operates thermal oil systems holds great responsibility – for the safety of staff and the environment in addition to the smooth running of production process. In Germany, regulations such as the Water Resources Management Act (WHG) and the Industrial Safety Regulation ensure that they are safely run, regularly inspected, correctly maintained, repaired using original spare parts and operated by trained personnel only. Although inspections and training are time- and cost-intensive, these obligations for operators must be taken seriously to avoid extensive downtime, personal injury and loss of insurance cover, warranty and rights of recourse. As an operator, you are obliged to take the relevant legislation and regulations into consideration. We’ve included excerpts of the most important ones here. Not to worry: Of course, we won’t leave you to navigate the maze of regulations alone. We can supply you with comprehensive advice on your obligations regarding your system and assist you with any necessary training, inspection and maintenance measures on request.

Safety inspection

The aim: operational safety and availability
  • Annual “Safety Inspection” plus oil analysis
  • External inspection every 2 years
  • Internal inspection every 5 years
  • Strength test every 10 years

All system operators are obliged to submit their thermal oil system to a safety inspection at legally prescribed intervals in accordance with industrial safety regulations. This can cause unwelcome interruptions, but it’s absolutely essential, as it’s an opportunity to identify any safety-related defects and necessary maintenance work you can plan and budget for. HTT can assist you on request and help ensure you fulfil your obligations as an operator. Get in touch!

Oil analyses

More safety, less outlay

According to industrial protection regulations and DIN 4754, heat transfer systems may only be operated “if the heat carrier has been checked for further usability at least once a year by a qualified person”. An important aspect of this is the inspection of the heat carrier oil for contamination, which we conduct for you in collaboration with accredited lab partners according to DIN 51529. All you need to do is get in touch: You take the oil sample in a container we provide and we take care of the analysis and certificate. You’ll find a guide to oil sampling here.

Training for operators

Operate systems safely

Qualified operators help you get the most from your machinery. Our training helps your employees obtain practical expertise first-hand and learn to deal with issues and perform some maintenance and upkeep activities themselves. We can agree specific training content with you where required.

Systems hire

A flexible way to deal with downtime

Our systems for hire are flexible temporary solutions designed to help you restart operations rapidly and reliably during downtime. Top tip: If heat carriers are heavily contaminated, we recommend installing filter modules – a simple way to help ensure operational safety. Our systems for hire at a glance:

CPS 07-3-30-1

CPS 08-5-60-1

Filtering systems

WTE 12-27-375-2

WTÖ 100-50-1

WTÖ 500-30-1-H

WTÖ 700-30-1-H

WTÖ 1250-40-1-V

Existing system upgrades

Optimising safety and energy efficiency

Would you like to improve your trusty system’s energy efficiency and carbon footprint? Get in touch! We are here to provide our expertise throughout the entire upgrade process, from planning, engineering, installation and commissioning to the start of production. Examples:

  • Repair/replacement of coiled pipe, flue gas casing or boiler (WTÖ)
  • Expanding existing systems
  • Relocating existing systems
  • Retrofitting the ER-BOX for energy recovery from process water
  • Upgrading your oil or gas-fired heat generator in accordance with immission legislation
  • Redundant concepts with gas-fired and electrical heaters
  • Retrofitting air preheaters to save primary energy

Article 62 German Water Resources Management Act (Wasserhaushaltsgesetz, WHG)

Dealing with substances hazardous to water

Facilities for storing, filling, producing and treating substances hazardous to water and systems for using substances hazardous to water in the commercial sector and in public institutions must be designed and constructed, maintained, operated and decommissioned in such a way that there can be no adverse change in the properties of water. The same applies to piping systems that

  1. do not exceed the area of a factory premises,
  2. are accessories for a system for handling substances hazardous to water or
  3. connect systems that are in close spatial or operational relation to each other.

Commissioning and modifications

Extract from Table No. 4 of the German Industrial Safety Regulation (Betriebssicherheitsverordnung, BetrSichV)

The following inspection obligations apply before the equipment is put into operation and in the event of changes to your system that require inspection.   Inspection of pressure systems and system components before being put into operation and following changes subject to inspection

  1. Pressure systems according to No. 2.1, including their system components according to No. 2.2, must be inspected before they are initially put into operation and following changes which are subject to inspection. Steam boiler systems for generating steam or hot water that have been out of operation for more than two years may only be put back into operation once their system components have been subjected to an internal inspection in accordance with No. 2.2, letter b.
  2. During the inspection prior to putting into operation, it must be inspected whether a) the technical documents required for the inspection, such as the operating instructions, are available and their content is plausible. b) the pressure system, including the system components, was constructed in a proper way and is in a safe condition and c) the technical protective measures specified are suitable and functional and the organisational measures specified are suitable. The inspection following a change subject to inspection may be limited to inspecting whether the pressure system has been modified in a proper way and is functioning safely.

Periodic inspections

Extract from Table No. 5 of the German Industrial Safety Regulation (Betriebssicherheitsverordnung, BetrSichV)

The following inspection requirements apply to pressure systems and system components.   Periodic inspections of pressure systems and system components

  1. Pressure systems according to No. 2.1 and their system components according to No. 2.2 must undergo periodic inspection.
  2. During the periodic inspection, it must be determined whether a) the technical documents required for the inspection are available and their content is plausible, b) the pressure system is in a proper condition and can be used safely and c) the technical measures specified are suitable and functional and the organisational measures specified are suitable.
  3. The inspection period for the pressure system according to No. 2.1 to be determined by the employer as part of the risk assessment must not exceed 10 years.
  4. The inspection period to be determined in accordance with Section 3, paragraph 6 as part of the risk assessment must be determined for pressure systems in accordance with this section no later than six months after the pressure system is put into operation.
  5. Periodic inspections of system components in accordance with No. 2.2 consist of external inspections, internal inspections and strength tests.
  6. External inspections of system components can be omitted a) for pressure vessels according to No. 2.2, letter a, unless they are fire-heated, waste gas heated or electrically heated, b) for simple pressure vessels according to No. 2.2, letter d. For pipework according to No. 2.2, letter c, internal inspections may be omitted.
  7. When inspecting system components, a) inspection visits during internal inspections may be replaced by other methods and b) static pressure tests during strength tests can be replaced by non-destructive methods if the employer presents an inspection protocol confirmed by an approved monitoring body with which equivalent statements can be made in terms of safety. On the basis of an inspection protocol, measures may also be defined on the basis of which an inspection statement can be made without the pressure system or system components needing to be taken out of operation. An inspection result may not be transferred from one pressure system to another pressure system. In deviation from sentence 1, the inspection protocol may be confirmed by a person qualified to perform the inspection if the relevant system components according to No. 6 or 7 may be periodically inspected by a person qualified to perform the inspection.
  8. The maximum periods specified in Table 1 apply to system components requiring periodic inspection by an approved monitoring body according to No. 6, Tables 2 to 11.

Useful information

Did you know? Interesting background information.

Product comparison

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CO2 neutrality

What your production’s environmental footprint? And how can we work together to make your systems more sustainable?

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