Non-destructive weld seam testing according to DVGW GW 350, requirement class D
type of weld ; NDT methods ; Amount of inspection
All welds ; VT; 100%
Stem; AUT / RT ; 100% / 30%
Connection, manual welding; RT / UT ; 30% / 100%
jointing, semi-mechanized or mechanized welding; AUT / RT ; 100% / 30%
Sonderbauwerke ; UT / RT bzw. AUT / RT ; 100% / 100%
SEL1: Heilbronn to Löchgau (2024 DN 1200, approx. 24 km)The following individual services are to be provided, among others:
- Construction site equipment for the described scope of services
- Non-destructive weld seam testing according to DVGW GW 350, requirement class D, the following methods:
Overview of the scope of testing for the respective type of weld seams (subject to justified changes):
type of weld; NDT method; Amount of inspection
All welds VT 100%
Stem AUT / RT 100% / 30%
Joint, manual welding RT / UT 30% / 100%
Joint, semi-mechanized or mechanized weld AUT / RT 100% / 30%
Sonderbauwerke UT / RT bzw. AUT / RT 100% / 100%
Garanatienähte UT / RT bzw. AUT / RT 100% / 100%
Stationsbau RT / OFR Stutzen 100% / 100%
Rohrschnitte UT-Dopplungsprüfung 100%
AUT ultrasonic testing using a certified, mechanized testing system consisting of a combined TOFD and phased array system according to DIN EN 12732
RT Durchstrahlungsprüfung DIN EN ISO 17636
UT Manual ultrasonic testing according to DIN EN ISO 17640
OFR surface crack testing according to DIN EN ISO 17638 or DIN EN ISO 3452
VT Visual inspection according to DIN EN ISO 17637
- Optional: Mobile Härtemessung (HV); Vakuumprüfung
SEL 2: Löchgau to Esslingen (2024/25, DN 1000, approx. 43 km)The following individual services are to be provided, among others:
- Construction site equipment for the described scope of services
- Non-destructive weld seam testing according to DVGW GW 350, requirement class D, the following methods:
Overview of the scope of testing for the respective type of weld seams (subject to justified changes):
type of weld; NDT method; Amount of inspection
All welds VT 100%
Stem AUT / RT 100% / 30%
Joint, manual welding RT / UT 30% / 100%
Joint, semi-mechanized or mechanized weld AUT / RT 100% / 30%
Sonderbauwerke UT / RT bzw. AUT / RT 100% / 100%
Garanatienähte UT / RT bzw. AUT / RT 100% / 100%
Stationsbau RT / OFR Stutzen 100% / 100%
Rohrschnitte UT-Dopplungsprüfung 100%
AUT ultrasonic testing using a certified, mechanized testing system consisting of a combined TOFD and phased array system according to DIN EN 12732
RT Durchstrahlungsprüfung DIN EN ISO 17636
UT Manual ultrasonic testing according to DIN EN ISO 17640
OFR surface crack testing according to DIN EN ISO 17638 or DIN EN ISO 3452
VT Visual inspection according to DIN EN ISO 17637
- Optional: Mobile Härtemessung (HV); Vakuumprüfung
SEL 3: Heidelberg to Heilbronn (2025/26, DN 1000, approx. 61 km)The following individual services are to be provided, among others:
- Construction site equipment for the described scope of services
- Non-destructive weld seam testing according to DVGW GW 350, requirement class D, the following methods:
Overview of the scope of testing for the respective type of weld seams (subject to justified changes):
type of weld; NDT method; Amount of inspection
All welds VT 100%
Stem AUT / RT 100% / 30%
Joint, manual welding RT / UT 30% / 100%
Joint, semi-mechanized or mechanized weld AUT / RT 100% / 30%
Sonderbauwerke UT / RT bzw. AUT / RT 100% / 100%
Garanatienähte UT / RT bzw. AUT / RT 100% / 100%
Stationsbau RT / OFR Stutzen 100% / 100%
Rohrschnitte UT-Dopplungsprüfung 100%
AUT ultrasonic testing using a certified, mechanized testing system consisting of a combined TOFD and phased array system according to DIN EN 12732
RT Durchstrahlungsprüfung DIN EN ISO 17636
UT Manual ultrasonic testing according to DIN EN ISO 17640
OFR surface crack testing according to DIN EN ISO 17638 or DIN EN ISO 3452
VT Visual inspection according to DIN EN ISO 17637
- Optional: Mobile Härtemessung (HV); Vakuumprüfung