DIN SPEC 91322:2015-09

This DIN SPEC in accordance with the PAS procedure was developed within a workshop set up on a temporary basis. The DIN SPEC was developed and approved by the authors named in the foreword. This DIN SPEC covers Horizontal Directional Drilling-Radar (HDD-radar) procedures based on the HDD using fluids as the drilling agent. HDD methods are used for the trenchless installation of pipelines, ducts and cables, sewers and drains, geotechnical elements and other applications. NOTE Pipelines, ducts and cables, sewers and drains, geotechnical elements and other application are collectively referred to in this document as 'utilities'. To provide a consistent quality standard during the process, this document sets out the requirements, quality assurance and testing for HDD-radar. It applies to installation and replacement of existing and new underground utilities and associated surface features necessary for the operation of underground utility infrastructure. This DIN SPEC contains the requirements for HDD-radar equipment and is additional to those set out in DIN EN 16228-3, which is deemed to be included in this specification. This document is for use by practitioners, such as engineers, constructors, project managers and utility owners, who are responsible for the installation or replacement of underground utilities. It is intended for use by those who procure trenchless technology services for the installation of utilities. This specification will also be of interest to those involved in the specification of Trenchless Technology (TT) techniques and those choosing between TT and conventional techniques. DVGW GW 321 already provides an excellent basis for the application of HDD in the gas and water area. However, this DIN SPEC also targets the use of HDD methods in the wastewater industry as well as energy and communications lines.