Method of fitting a cable into a pipe

1. A method of installing one of a cable and conduit into at least one plastic pipe of a fluid carrying pipeline system, comprising the following steps:

a) attaching a first saddle fitting at a first location on said plastic pipe by electro-fusion;

b) opening the pipe at the first location;

c) introducing the cable or a pull body through the saddle fitting into the pipe towards a second location or retrieving at least part of the cable or a pull body introduced at a second location;

d) pulling the cable directly or by means of the pull body through the pipe,

e) sealing of the cable ( 18 ; 31 ; 33 ; 38 ) in the saddle fitting by electro-fusion, wherein the saddle fitting comprises a saddle plate and a stem connected with said saddle plate, and said cable fed through said saddle fitting is sealed inside said stem of said saddle plate by electro-fusion of an annular electro-fusion fitting integrated with said stem.

2. Method according to claim 1 , wherein at the second location a second saddle fitting is attached by electrofusion.

3. Method according to claim 1 , wherein the pipe is opened by drilling at the first and/or second location.

4. Method according to claim 3 wherein a vacuum is provided during drilling.

5. Method according to claim 3 , wherein the drilling comprises the following steps:

a. opening a lower valve and launching the drilling system from a lock room into the saddle fitting region,

b. drilling a hole into the pipe wall,

c. pulling back the drilling system into the lock room,

d. closing the lower valve.

6. Method according to claim 1 , wherein the cable or pull body is retrieved by a catching device.

7. Method according to claim 1 , wherein the cable is sealed in both fittings by electro-fusion.

8. Method according to claim 1 , wherein the cable is introduced in a fluid-tight manner.

9. An electro-fusion saddle fitting, in particular for performing the method of installing a cable or a conduit into a plastic pipe, according to claim 1 , comprising a stem connected with a saddle plate arranged for attaching onto the plastic pipe by electro-fusion, wherein the stem comprises a pneumatic seal and/or an electro-fusion fitting integrated with the stem arranged for sealing a cable fed through the fitting by fusing the electro-fusion fitting to the cable by electro-fusion inside the stem.

10. Electro-fusion saddle fitting according to claim 9 , wherein the saddle fitting is connected to a hydraulic feeding system.

11. Electro-fusion saddle fitting according to claim 8 , wherein the saddle fitting is connected to a fluid-tight container system.

12. Lock system for installing a cable or conduit into at least one plastic pipe of a pressurized pipeline system, in particular for performing the method according to claim 1 , comprising a lock room and an upper valve, in particular a sphere valve, provided at one end of the lock room and a lower valve, in particular a sphere valve, provided at the opposite end of the lock room.

13. Lock system according to claim 12 , wherein the lock room comprises a driller and/or a pull body and/or a parachute and/or a catching device.

14. Lock system according to claim 12 , wherein the lock system comprises a fining, in particular a saddle fitting, wherein the lower valve is connected to the stem of the fitting.

15. An electro-fusion saddle fining according to claim 9 , wherein the saddle plate includes a fusion plate for attaching the fitting onto the plastic pipe by electro-fusion.