Steam boiler systems are usually subject to compulsory monitoring and various legal framework conditions must be observed and complied with when manufacturing the components, during planning and construction and when operating the system. The following requirements are stipulated at all levels of the legislation (and monitoring):

  • European directives and ordinances, such as the Pressure Equipment Directive, Machine Directive, Low Voltage Directive, Gas Appliances Directive, EMC Directive, Hazardous Substances Directive and Explosion Protection Directive
  • National laws and ordinances, such as the German Health and Safety at Work regulation, Emission and Immission Control Act, Occupational Health and Safety Law, Hazardous Substances Ordinance, Water Resources Law
  • Regional and local regulations, such as building regulations, water conservation, fire safety, additional emission requirements

The most important laws, directives, ordinances and standards governing the installation and operation of a steam boiler system are described below. These are arranged in the following groups:

  • Manufacturing of boiler systems
  • Emission and immission protection laws
  • Approval regulations/operating permit
  • Operation of boiler systems

In this case it must be observed that further EU directives or national laws and regulations apply.

Using Germany as an example, the following diagram shows the basic procedure and is separated into two parts; manufacturing, for which European law applies and operation, for which national law predominantly applies.

Procedure for manufacturing and operation based on the Pressure Equipment Directive 2014/68/EU

Procedure for manufacturing and operation based on the Pressure Equipment Directive 2014/68/EU IV)


EU law


German law

DGRL: Pressure Equipment Directive 2014/68/EU
BetrSichV: German ordinance on industrial safety and health in relation to the use of equipment and materials
ZÜS: Approved notified body

IV) Rhineland Technical Inspection Authority (TÜV Rheinland)