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Flowline Alaska is equipped to provide both pipe and
structural steel fabrication for a variety of applications.
A large majority of the fabrication work we produce
includes pipe spooling, pipe double joint welding, and
associated piping supports and structural steel assemblies
common to the piping industry. We have provided pipe
fabrications from 3/4" diameter to 60" diameters
in a variety of material grades up to 2" in thickness.
Flowline utilizes a number of welding processes and
equipment for both manual and state-of-the-art semi-automatic
welding that can be applied to the welding of carbon
steels, corrosion resistant alloys and high density
polyethylene materials. Welding processes currently
used by Flowline include: SMAW (Shielded Metal Arc Welding),
FCAW (Flux Core Arc Welding), GTAW (Gas Tungsten Arc
Welding), GMAW (Gas Metal Arc Welding), SAW (Submerged
Arc Welding), STT (Surface Tension Transfer), and HDPE
Fusion (High Density Polyethylene Fusion).
All fabrication work is conducted by qualified welders
working to client approved procedures qualified under
ASME, API and AWS Code requirements. We employ certified
welding inspectors and a third party NDE Inspection
company with the capabilities of VT (Visual), RT (Radiographic),
UT (Ultrasonic), PT (Penetrant), and MT (Mag Particle)
testing to monitor and document the quality of work
we perform. Post weld heat treatment processes are also
available.
SPOOL FABRICATION
Flowline staffs a full time Engineering, AutoCAD and
materials department to support the welding fabrication
operations. Client provided isometric drawings are translated
into “truckable” pipe spool shop drawings
for fabrication in our facility. We can build “on-pad”
and “cross country” pipeline spools up to
80’ in length. Typically pipe and fittings are
provided by the client for project specific fabrication.
Our spool fabrications are nicely complimented with
the corrosion coating and spool insulation services
we also provide. These additional capabilities allow
us to create “turn-key” spools for field
installation.
DOUBLE JOINTS
Flowline’s double jointing facility is state of
the art, with the ability to implement Surface Tension
Transfer (STT-GMAW), Submerged Arc (SAW) and Flux Core
(FCAW) welding processes. Located immediately adjacent
to a rail spur, this allows for easy offloading of client
supplied pipe for double jointing into 80 foot lengths
prior to application of our corrosion coatings, insulation
and cross country spool fabrication. The double jointing
work scope conveniently reduces the number of cost prohibitive
North Slope field installation welds, in addition to
reducing the number of field applied coating and insulation
weld packs which have historically been initiation points
for external corrosion.
DOWNHOLE CASINGS
Flowline has fabricated and insulated a number of 80’
long downhole well casings (conductors) and pump caissons
(up to 130’ in length) which are comprised of
a pipe-within-a-pipe geometry with an insulated annulus.
The casings are typically supplied for well pads that
have a number of wells in close proximity that may require
a thermal barrier to eliminate any thaw type phenomena
that can take place within a gravel well pad located
in an arctic climate.
ROAD CROSSINGS
Flowline has an extensive history in manufacturing turn-key
road crossing assemblies for the North Slope Oil fields.
Road crossings are fabricated to include the inner carrier
pipe that is built into the outer casing pipe. The pipe
system is fabricated, hydrotested, coated and insulated
with casing spacers. A number of various geometries
have been fabricated dependent upon client needs. The
turn-key road crossing assembly lends itself to ease
of installation by a single crane pick/placement into
a pre-trenched road crossing that can be immediately
backfilled. Flowline has provided and shipped road crossing
assemblies up to 125’ in length and 15’
in width.
VSM’s
Flowline performs double jointing and splicing activities
for pipeline VSM fabrication. VSM fabrication is conducted
to the AWS D1.1 Welding Code. Flowline’s on site
rail spurs lend to the convenience of shipping bulk
VSM pipe quantities.
PRESSURE TESTING
Flowline has the ability to pressure test piping systems
to client provided specifications prior to shipment.
Hydrostatic tests are typically performed in our climate
controlled shop environment with clean potable water.
Large volume testing can be conducted within Flowline’s
fabrication yard. Low Pressure pneumatic testing can
also be performed with clean dry compressed air if approved
by client provided specifications. Shop pressure tests
lend themselves to the convenience of eliminating cost
prohibitive pressure tests that are required to be conducted
at the remote installation site.
FINAL DOCUMENTATION & TRACEABILITY
Each project is completely documented from the receipt
of materials to the final shipment of fabrication. At
the end of each project a full set of records for the
services we applied to owner supplied pipe and fittings
are provided to our clients. Through this documentation
traceability of materials is easily pinpointed.
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