• Compressor systems according to DVGW regulations
• Gas pressure regulating stations according to DVGW regulations
• Pipelines for the transport of raw gas according to BVOT
• Pipelines for the transport of flammable and water-polluting liquids according to BVOT in conjunction with the technical rules for pipelines (TRFL), Annex III
• Biogas plants according to DVGW regulations
• Acceptance and periodic inspections of pipelines and vessels according to AwSV