DIN 4140:2023-05

Properly perform insulation work on industrial installations

DIN 4140 specifies requirements for the installation of thermal and cold insulation on industrial installations and in building services engineering. It covers the planning, selection and application of insulation systems and supports the proper execution of insulation work on pipes, vessels, equipment, ventilation systems and energy supply systems. The standard therefore provides a consistent basis for energy efficiency, system protection and operational safety.

What does DIN 4140 cover?

The standard defines requirements for thermal and cold insulation systems for industrial installations and describes their proper installation under industrial and building-services conditions. It focuses on the selection and application of insulation materials, requirements for insulation thicknesses, load-bearing and support structures, moisture protection and corrosion protection, and the safe installation of insulation systems under different operating conditions. The standard also includes provisions for quality assurance, inspection and maintenance.

Topics covered

• Thermal and cold insulation of industrial installations
• Requirements for insulation systems and insulation thicknesses
• Application and selection of different insulation materials
• Protection against moisture ingress and corrosion under insulation (CUI)
• Insulation of pipes, vessels, fittings and air ducts
• Load-bearing and support structures and insulation supports
• Cladding, vapour barriers and corrosion protection
• Acoustic and fire protection requirements for insulation systems
• Inspection, maintenance and quality assurance

Practical relevance

Thermal and cold insulation makes an essential contribution to the energy efficiency of industrial installations, personnel protection and the prevention of energy losses. DIN 4140 helps planners, plant engineers and specialist insulation contractors design and install insulation systems properly and maintain compliance with operational requirements over the long term.

The expanded requirements for moisture and corrosion protection, energy efficiency and the proper installation of modern insulation systems are particularly relevant. The standard therefore supports the safe, economical and energy-efficient operation of technical installations over the long term.

Changes compared with DIN 4140:2014-04

The 2023 edition was comprehensively revised. The most important changes include:

• Alignment with the German Buildings Energy Act (GEG)
• Updated normative references and terminology
• Expanded recommendations on insulation thicknesses and energy efficiency classes
• Inclusion of new insulation materials and supports for cold insulation
• Consideration of revised AGI worksheets
• New provisions relating to inspections, air duct penetrations and heat transfer systems using organic heat transfer media
• Expanded requirements for corrosion under insulation (CUI) protection and moisture protection

Target audience

• Building services engineering (MEP) specialists
• Engineers and plant designers
• Specialist insulation contractors and insulation companies
• Operators of industrial plants
• Energy consultants
• Energy efficiency and plant safety professionals
• Experts and inspection bodies
• Industrial and building services engineering companies

Conclusion

DIN 4140 provides the central basis for the proper installation of thermal and cold insulation on industrial installations. Through its requirements for insulation materials, moisture and corrosion protection, energy efficiency and quality assurance, it supports the safe, economical and durable installation of modern insulation systems in industry and building services engineering.

This document replaces DIN 4140:2014-04 .