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FRM-22.1 Rev.G
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7. Positioning for Between the Seal Hydro Testing
CAUTION: Never install the GripSafe plug in a position where the
Gripping Wedge
would be located
over weld droop or ridge.
7.1 If using the plug to hydrostatically test a weld, ensure proper Depth of Insertion by
using the following method:
1.
Measure the
Weld Zone Depth Distance
from the pipe or fi tting end to the center of weld
area to be tested.
2.
Obtain the
Ported Spacer Center
from
Table 3
, distance from the top of the
Compression
Hex Nut
㉑
to the center of the
Ported Spacer
⑰
. Th e plug should be in the desired
installation orientation (
Method 1
or
Method 2
, see Section 5, Steps 5.2 and 5.3) while
measuring this distance.
3.
Subtract the
Weld Zone Depth
from the
Ported Spacer Center
.
4.
Insert the plug while measuring from the pipe or fi tting end to the top of the
Compression Hex Nut
㉑
and stop inserting when the reading on the measuring
tape matches the diff erence found - Step 3.
Example:
Testing a weld on a 2” Class 600 Weld Neck Flange
•
Ported Spacer Center 18.58”
•
Weld Zone Depth 2.88”
•
Ported Spacer Center – Weld Zone Depth = 18.58” – 2.88” =
15.70”
From the calculation and shown in Figure 5, the plug should be
inserted into the fi tting until the distance from the top of the
Compression Hex Nut
㉑
to the end of the fi tting is 15.70”.
Table 3: GripSafe DBB Ported Spacer Center
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