MAINLINE Kleiss MCS60-1016 System Manual page 6

Example I – Stopping Sequence: Stoppers Positioned Towards Each Other (Most Flexible) Example I – Stopping Sequence: Stoppers Positioned Towards Each Other (Most Flexible)
STOPPING TOWER DISTANCES
Nominal Pipe Size
10"
12"
14"
16"
18"
A = minimum distance between towers
B = stopper length
L1* = distance from stopper/tower to work area - use standard industry & company practices to minimize heat transfer & sparks
reaching the inflatable stopper
L2** = distance from stopper/tower to work area - measurement is a guide only, follow manufacturer's fitting recommendations
1) If a by-pass in the work area is being used (through our MCS tool or another), initiate the by-pass flow first.
2) Always insert first inflatable stopper WITH the flow of gas.
3) Always inflate the stopper as quickly as practical.
4) Suggested stopper setting sequence is tower #1, #2, #3, #4. Set all 4 stoppers.
5) First inflated stopper is now in a no flow condition. Reset stopper for best possible seal (deflate, reposition stopper
rod, inflate).
6) Always allow stoppers to settle for 10 minutes prior to beginning pipeline work. This allows the stopper to
acclimate to internal pipe conditions. Verify system pressures, inflation pressures, and any bleed-by before starting
pipeline work. Adjust as necessary.
7) Use the by-pass / vent port on tower #2 or #3 to purge the work area. Utilize the MCS vent stack to assist in
evacuating the work area. This connection can also be used to inject nitrogen into the work zone.
8) Keep by-pass / vent ports on towers #2 and #3 open to atmosphere during work to keep gas away from the work
area. Follow company procedures for venting and purging gas.
9) This set up can easily be used on both single feed and dual feed systems.
A
B L1* = Steel Welding
( )
minimum
88" 44"
106" 53"
106" 53"
114" 57"
114" 57"
L2** = PE, CI, and Mechanical
40"
40"
40"
40"
N/A
Kleiss MCS60-1016 System Manual v.15 June 2020
30"
36"
42"
48"
54"
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