Rotational Or Twist Misalignment; Dismantling The Atm-9 - Enerpac ATM-9 Hoja De Instrucciones

6. When alignment is completed, the flange bolts may
be inserted and tightened. After replacing all of the
bolts in all open bolt holes (except for the bolt hole in
which the tool lift hook is inserted), remove the tool
by reversing steps 1 through 5.
CAUTION: Open pump release valve and be
sure that all hydraulic pressure is relieved
before disconnecting any hoses or fittings.
7. After removing the tool from the flange, insert and
tighten the last flange bolt in the remaining bolt hole.

8.0 ROTATIONAL OR TWIST MISALIGNMENT

This is a common problem on both onshore and
offshore pipeline installations (see Fig. 8). Quite often
the flanges are in alignment but the operator is unable
to fit the bolt into any two corresponding bolt holes on
the joint's circumference. The ATM-9, with its 90 kN [9
ton] capacity, has the ability to manipulate the flanges
in various directions.
The set-up procedure is the same as before with one
possible exception. The ATM-9 can be attached to
the most accessible point on the joint's circumference
because the misalignment occurs at all bolt holes to the
same degree.
8.1 The recommended operating procedures are:
1. Select the most convenient or accessible point on
the joint's circumference and attach the tool there.
(Follow steps 1 thru 5 in section 7.0).
2. In the situation when both flanges are aligned but
rotational misalignment is present the ATM-9 is used
to push the flanges beyond alignment until one pair
of bolt holes become parallel (see point A in Fig. 8).
Fig. 8
A
3. Insert the bolt into the bolt hole at point A and
then release ATM-9. The load will transfer onto the
inserted bolt.
4. The ATM-9 can then be attached at another point on
the joint's circumference (see Fig. 9) pushing against
the inserted bolt. Advance the hydraulic cylinder until
another, or all the bolt holes are parallel (see Fig. 10).
5. Once the remaining bolts are inserted, the ATM-9
can be removed.
Fig. 9
A
Fig. 10
Please note that in some situations the operator may
have to 'chase' the misalignment around the joint's
circumference and attach the ATM-9 at several different
positions to rectify the misalignment. On each occasion
the procedures outlined in steps 1 to 7 in section 7.0
should be followed.

9.0 DISMANTLING THE ATM-9

• Once alignment is achieved, all work on the joint
finished, and bolt-up completed (apart from the bolt
hole in which the ATM-9 is located), the tool can be
removed from the joint by reversing steps 1 thru 5 in
section 7.0.
• Care should be taken not to drop any of the
component parts when removing them from the
aligned joint. This action will prevent injuries
personnel.
Note: Refer to the ATM-9 repair parts sheet for
complete parts list and assembly diagrams.
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