In this
case, please follow the same assembly procedure of Push-on joint in
general with additional to the following points:
- Check the presence and correctness of the
chamfer and welded-bead at the end of the pipe spigot (or flange
spigot piece).
- Carefully clean the split ring and the
gland, particularly at the points of contact.
- Place the gland and the split ring on the
end of the barrel of the pipe to be jointed beyond the welded bead.
(See fig.1). Since the internal diameter of split ring is less than
the external diameter of the diameter welded, its necessary for DN<400mm
to open up this ring by means of V shaped wedge inserted between the
two ends of split ring. (See fig. 2).
- Make a mark on the pipe to be laid at a
distance "a" from the weld bead. The value of
"a" is given opposite table. (See fig. 3 and table 1).
- Insert the spigot of the pipe to be jointed
in the socket, making sure that the party to be jointed are aligned,
until the marking on the barrel is directly in line with the end of
the socket. This operation is carried out with the aspect discussed
in "Push-on Assembly."
- Check that the gasket is always correctly
positioned in its recess, using the feeler as discussed before.
- Bring the split ring into contact with weld
bead, make sure that it makes good contact all the way round and
that it fits snugly against the pipe spigot.
- Bring the gland into contact with split
ring. Its essential to center the gland. This operation carried out
easily by means of three wooden wedges positioned around the
circumference of the pipe.
- Fit the bolts and tighten the nuts by hand
until they make contact with gland. Check the correct position of
the latter, then gradually tighten the nuts with a wrench proceeding
the same way as for car wheel nuts.
- Using a torque wrench, complete the
tightening of nuts until contact is made between the gland and face
of the socket.
- If necessary, deflect the joint by rotating
the pipe around the "spherical joint" within the limits
indicated in page 9.
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