manually welded joints fully automatic welded joints
mechanical connections
6.3. Insulation carried out
in the workshops
on site
6.4. pipelaying
a) length below ground _______________________ m.
b) for excavation use of explosive necessary? Yes No
c) description of laying method ____________________________________________________
d) max. length of open trench ________________________Km.
e) Max. time of open trench __________________________ days
6.5. testing length of tested sections ____________________________km.
Hydrostatic test, pressure ______________________bar
High yield test , pressure ______________________ bar
7 Crossings a) rivers, canals by syphon double syphon
pipebridge existing bridge
no. of crossings ______________________________________
b) of roads, railways by thrust bore protection tube
tube bridge
no. of crossings ______________________________________
c) of service lines ( water, gas, oil, electricity)
thrust bore protection tube pipebridge tunnel
no. of crossings ______________________________________