Enerpac ATM-4 User Manual

Page 5

CAUTION: Do not exceed maximum

force rating. Maximum force on screw bolt

is 50 ft. lbs. [68 Nm]. Damage to tool will

result if maximum force rating is exceeded.

CAUTION: Do not use impact tool on

screw bolt. Severe damage to the tool will

result if impact tool is used.

7.0 ROTATIONAL OR TWIST MISALIGNMENT

This is a common problem on both onshore and

offshore pipeline installations (see Fig. 11). 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.

Fig. 11

Rotational or Twist Misalignment

The ATM-4, within its 4 Ton [40 kN] maximum

capacity, has the ability to manipulate the flanges

in various directions. The setting-up procedure is

the same as before with one possible exception.

The ATM-4 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.

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 4 in paragraph 6.0)

Fig. 12

2. In this situation when both flanges are aligned but

rotational misalignment is present, the ATM-4 is

used to push the flanges out of alignment until

one pair of bolt holes become parallel (see point

A, Fig. 12).

Fig. 13

3. Insert the bolt into the bolt-hole at Point A (see

Fig. 13) and then release the ATM-4. The load will

transfer onto the inserted bolt.

4. The ATM-4 can then be attached at another point

on the joint’s circumference (see Fig. 14) pushing

against the inserted bolt. Advance the screw bolt

until another, or all of the bolt-holes are parallel.

Once the remaining bolts are inserted, the ATM-4

can be removed.

Fig. 14

Please note that in some situations the operator may

have to ‘chase’ the misalignment around the joint’s

circumference and attach the ATM-4 at several

different positions to rectify the misalignment. On

each occasion the procedures outlined in steps 1 to

5 in paragraph 6.0 should be followed.