Our certifications
Assuring quality
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Head of Machinery and Equipment
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SWR certifications
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DVGW GW 301
As per DVGW GW 301: Gas and water pipelines for all pressures and nominal sizes; certifications: G1 ge-pe-st, W1 ge-pe-pvc-st
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DVGW GW 302
As per DVGW 302: Group R 2, renewal of gas and water pipelines by pipe pull-in or pipe insertion with annular space as per GW 320-1
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AGFW FW 601
District heating pipelines for hot water systems of all nominal sizes, all delivery temperatures and all delivery pressure stages as per AGFW FW 601 Group FW 1: DK, ku, st
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DVGW TRGI G600
Authorised specialist in building gas installations
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Quality seal
Underground cable line construction RAL GZ 962/2
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Quality seal
Liquid soil RAL GZ 507 A1, H1
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Quality seal
Soil construction RAL GZ 961 AK 2
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ISO 9001 certificate
Introduction and use of a quality management systems as per EN ISO 9001:2015; area of application: Project engineering and implementation in civil engineering and pipeline construction and in electrical and telecommunications system construction
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ISO 3834-2 certificate
Introduction and use of a management system as per EN ISO 3834-2; area of application: Project engineering and implementation in civil engineering and pipeline construction and in electrical and telecommunications system construction
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Pressure Equipment Directive certificate from TÜV Hessen
Qualification as per EN ISO 3834-2: 2006 in conjunction with AD 2000 data sheet HP 0/HP100 R and EN 13480-4:2013
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TÜV Hessen
Qualification of welding procedures as per EN ISO 15614-1, DVGW GW 350, AFGW FW 432, AGFW FW 446
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TÜV Hessen
Specialist company as per German Water Resources Act based on Section 62 German Regulations on Installations Handling Substances Hazardous to Water (AwSV)
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SCC certificate***
Introduction and use of an SCC** safety, health and environment management system; area of application: Project engineering and implementation in civil engineering and pipeline construction and in electrical and telecommunications system construction in operational plants
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Umweltinstitut Offenbach
Asbestos demolition and maintenance work as per TRGS 519 Appendix 4c
Our employees’ qualifications
- Steel welder as per EN ISO 9606-1
- Sheather trained as per DVGW Work Sheet GW 15
- Pipelayer in plastic pipeline construction trained as per DVGW Work Sheet GW 326
- PE welder trained as per DVGW Work Sheet GW 330
- Welding supervisor trained as per DVGW Work Sheet GW 331
- Welding engineers trained as per EN ISO 14731
- Managers and executives trained as per SCC**
- Occupational health and safety specialist
- Safety officer
- First aider as per BGV A1
- Measurements as per DVGW Work Sheet GW 128
- Certified general foremen
- Trained civil engineering and pipeline construction workers
- Person instructed in electrical engineering as per BGR A3
- Specialist as per German Water Resources Act based on Section 62 German Regulations on Installations Handling Substances Hazardous to Water (AwSV)
- Liquid soil specialist
- Specialist as per DVGW Work Sheet GW 129
- Lineworkers up to voltage level of 30 kV
- NDT2 tester as per EN ISO 9712
- TRGS 519 Asbestos
- Instructed personnel as per RSA (ZTV-SA 97 MVAS 99)