Bolt
Tensioning and Torquing
Construction
bolting and post leak testing bolting - all part of the
service.
Everyone
wants a leak free system prior to start up and MCL has often
been at the forefront of finding and repairing leaks. The
next step is to provide a system that only requires two
schedule entries - "Bolting" and "Leak Testing". Where the
bolting has been completed to such a high specification,
that only one leak test is required to be certain that the
system is leak free. This solution has worked in a number
of situations and we are now actively marketing this through
our alliances. Offering this additional bolting service
as a part of one package saves time and money since one
sub-contractor can control a complete leak testing project
with fewer personnel on site.
All
flange bolts over 1" are hydraulically bolt tensioned and
all bolts below 1" would be hydraulically torqued or hand
torqued.
Procedures
are supplied including tensioning or torquing data sheets
on specific classifications of joints and bolt material
calculations. A flange record is kept and issued for each
joint repaired by this method.
We
can provide a controlled database management system, which
provides the status of each and every flange joint and coupling.
This would allow the operator the flexibility to call up
a host of reports and historical data for information or
post job analysis.
The
information / reports could contain a wide range of information
for example:
- Flange
description
- Size
and class
- Gasket
type, size and make
- Number
of bolts, dolt diameter and length
- Condition
of flange faces
- Grade
of lubricant used / condition of bolts
- Type
of joint (RF, RTJ)
- Tools
used and serial numbers Maximum tension / torque permissible
- Recommended
tension / torque
- Date
of make up
- Name
of operator and inspector / company representative
This
proposed technique for total leak and bolt tensioning management
will realise significant cost benefits over the total life
cycle of any facility.
Hydraulic
oil flushing is normally used on systems, which require
a high degree of cleanliness such as lubricating and seal
oils systems, hydraulic control systems and subsea hydraulic
pipework. The system oil is circulated round the piping
(and can be temperature controlled at temperatures up to
1000C) at velocities of 5m/sec. This flushing continues
until acceptable particle analysis count is obtained through
automatic, electronic or manual counting methods. The key
to providing a superior service is excellent filtration
and good pumping capacity.
MCL
have recently completed the construction of one of the world's
largest oil flushing units which was built specifically
for the flushing of multiple 1" subsea umbilical lines,
16 miles long and operating in water depths of up to 1000m.
The
key to providing a superior service is excellent filtration
and good pumping capacity.
