of pig valves in other markets is bright. The most common
installations are:
)
)
In crude lines, to prevent or to clear clogging due to heavy
amounts of solids such as sands or paraffin was.
)
)
In gas lines, to clear collection of moisture/water for
improving product quality.
)
)
In consideration for ‘salt/brackish water’, H
2
S, CO
2
, ethanol
and other critical services.
)
)
Pig valves can be placed in multiple sections of a pipeline.
What are qualifications/specifications for the
SHPV?
Every SHPV pig valve is manufactured and tested to the
strictest API 6D requirements. TVC’s manufacturing facilities
are certified to ISO standards, Q1, and API certified and
stamped. All facilities are integrated and auditable. The
SHPV pig valve has a forged body (A350-LF2), trunnion design
complete with ‘block and bleed’ vents and drains. Each SHPV
is tested to API 6D and API 598 requirements. All SHPV’s are
constructed and certified by NACE. Fully traceable MTR’s are
furnished for every valve. Other features of the SHPv include:
)
)
Large button head grease fittings with buried checks.
)
)
Pig entry cap with vent and pressure relief safety device.
)
)
Lockable stop plates for 2 - 6 in.
)
)
ISO mounting pads.
)
)
Accepts TVC bullet, spherical and double dish pigs.
How does a SHPV pig valve work?
The SHPV pig valve follows a typical design of an API 6D
internal trunnion flanged ball valve and includes a cap access
to either install or remove a pig. It is bolted into the pipeline
similar to a trunnion ball valve. Typical of a ball valve, the
SHPV requires a quarter turn operation for open and close.
The valve is in the closed position when launching a pig, with
the safety relief valve used to vent the access cavity. The cap
is then removed, the pig is installed, and the cap is replaced
and secured. The valve is turned into the open position to
launch the pig. An integral catcher plate prevents the pig
from travelling upstream. The same procedure is used in a
receiving valve as the valve is in the open position to allow
the pig to arrive. The downstream ‘catcher plate’ stops the
pig in the ball, the valve is turned to the closed position, the
cap is vented and the pig is removed. The cap is replaced
and secured. The launching valve is also available without
the catcher plate for use in selected locations within the
pipeline.
SHPV features
)
)
The Tiger Valve SHPV is available as a launcher, launcher/
catcher, and receiver.
)
)
Available sizes are 2 - 16 in. TVC can engineer and
manufacture up to 36 in.
)
)
Pressure classes available are 150#, 300#, 600#, 900# and
1500#.
)
)
Standard seals are HNBR, with options for Viton.
)
)
Standard seat rings are furnished with Devlon Inserts.
)
)
Easily operated closures and 8 in. and larger have a closure
davit.
)
)
IOMs and pig sizing charts available on all shipments.
)
)
Regional Sales Managers and Product Manager for training
and sales support.
)
)
Onsite training available and troubleshooting available if
required.
SPHV vs conventional launcher/receiver trap
A major joint venture was formed by two prominent
midstream companies to engineer, design and construct a
grassroots gathering system to collect and deliver massive
amounts of crude, condensate, and natural gas production in
this newly developed shale play in the US Midwest region.
Tiger Valve Co. and its representatives were invited initially to
present the SHPV shut off pigging valve for consideration for
the project. There were several critical factors to be included
in the evaluation process, including valve design, function,
quality and performance, right-of-way and geographical
demands, project economics, and construction timeline
demands. TVC was required to successfully respond to all
factors to qualify for approval.
Figure 1.
SHPV Shut-Off Pigging Valve.
56
World Pipelines
/
JUNE 2015
