aquatherm 50341 Manuale di funzionamento e manutenzione - Pagina 7

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PART C: wELD-IN sADDLEs

aquatherm- weld-in saddles are available for pipe outer diameter of 40

- 630 mm.

Weld in saddles are used for

•

branch connections in existing installations

•

the substitution of a reduction-tee

•

branch connections in risers

•

sensor wells, etc.

1. Before starting the welding process, check whether the aquatherm-

welding devices and tools comply with the requirements of "Fusion Part A".

2. The first step is to drill through the pipe wall at the intended outlet point

by using the aquatherm- drill (Art.-No. 50940-50956).

3. IMPORTANT!

Only the oxgen barrier layer of the aquatherm blue pipe OT Art.-No.

2170708-2170138 must be removed with the mentioned aquatherm

special peeling drills mentioned in the table beside.

For this the special peeling drill is inserted into the bore hole and

swaied 2-3 times with light pressure and low rotating speed between

the pipe walls until the oxygen barrier layer is completely peeled off.

Remove burrs, debris and other dirts with a chamfering tool or the

aquatherm cleaning wipes. Do not touch the peeled surface any more

and protect it from new pollution.

When using aquatherm green pipe - stabi composite pipes remove

the rest of the aluminium remaining at the bore hole with the

aquatherm- chamfering device.

4. The welding device / saddle welding tool must have reached the

required operating temperature of 260 °C (check with reference to

"Fusion Part B, item 2").

5. The welding surfaces have to be clean and dry.

6. Insert the heating tool on the concave side of the weld in saddle tool

into the hole drilled in the pipe wall until the tool is completely in

contact with the outer wall of the pipe. Next the weld-in saddle tool is

inserted into the heating sleeve until the saddle surface is up against

the convex side of the welding tool. The heating time of the elements is

generally 30 seconds.

7. After the welding tool has been removed, the weld-in saddle tool is

immediately inserted into the heated, drilled hole. Then the weld-in

saddle should be pressed on the pipe for about 15 seconds. After being

allowed to cool for 10 minutes the connection can be exposed to its

full loading. The appropriate branch pipe is fitted into the sleeve on the

aquatherm- weld-in saddle using conventional fusion technology.

By fusing the weld-in saddle with the pipe outer surface and the

pipe inner wall the connection reaches highest stability.

Drilling through the pipe wall

Removal of the oxgen barrier layer from the aquatherm blue OT-pipe

aquatherm saddle peeling tools

Art.-No.

for

aquatherm blue pipe ot

50921

pipes ø 50-125 mm

50922

50924

50926

50928

aquatherm saddle peeling tools

Art.-No.

for

aquatherm blue pipe ot

50421

pipes Ø 160-250 mm

50422

50424

50426

50428

The welding tool is inserted into the pipe wall ...

...heating-up of the elements

Joining

Ready!

Dimension

for weld-in saddles ø 20 & 25 mm

for weld-in saddles ø 32 mm

for weld-in saddles ø 40 mm

for weld-in saddles ø 50 mm

for weld-in saddles ø 63 mm