DIN SPEC 91322 [CURRENT] references following documents:
| Document number | Edition | Title |
|---|---|---|
| DVGW GW 329 | 2003-05 | Fachaufsicht und Fachpersonal für steuerbare horizontale Spülbohrverfahren - Lehr- und Prüfplan More |
| DIN 18127 | 2012-09 | Soil, investigation and testing - Proctor-test More |
| DIN 18129 | 2011-07 | Soil, investigation and testing - Determination of lime content More |
| DIN 18134 | 2012-04 | Soil - Testing procedures and testing equipment - Plate load test More |
| DIN 18137-1 | 2010-07 | Soil, investigation and testing - Determination of shear strenght - Part 1: Concepts and general testing conditions More |
| DIN 4020 | 2010-12 | Geotechnical investigations for civil engineering purposes - Supplementary rules to DIN EN 1997-2 More |
| DIN 4124 | 2012-01 | Excavations and trenches - Slopes, planking and strutting breadths of working spaces More |
| DVGW GW 321 | 2003-10 | Steuerbare horizontale Spülbohrverfahren für Gas- und Wasserrohrleitungen - Anforderungen, Gütesicherung und Prüfung More |
| EN 12007-4 | 2012-08 | Gas infrastructure - Pipelines for maximum operating pressure up to and including 16 bar - Part 4: Specific functional requirements for renovation More |
| EN 13380 | 2001-05 | General requirements for components used for renovation and repair of drain and sewer systems outside buildings More |
