Australian Pump Industries has developed a new trailer mounted hydrotest
rig designed for Australia’s gas pipelines and processing plants. The Hydrotest
Wagon is a fully self-contained mobile unit capable of executing the entire
hydrotest function without ancillary equipment.
Aussie Pumps’ Project Engineer, Jeremy Shelton explains that the Wagon
carries its own water supply, a high pressure pump for fast-filling pipes and a
hydrostatic test pump that enables pipelines and other equipment to be tested
at up to 350 Bar (5,000 psi). The entire equipment has been mounted on a super
heavy duty off-road trailer built rugged enough to be used on remote sites
around the country.
The heart of the hydrostatic test system is a 350 Bar ‘Big Berty’
Bertolini triplex pump driven by a 23hp Kohler twin cylinder diesel engine. The
Bertolini RA series slow speed pump runs at 1450 rpm and features heavy duty
solid ceramic pistons for wear resistance, a unique long-lasting sealing system
and a 1-piece forged brass pump head. Stainless steel valves are enclosed within
bronze valve caps featuring bottom mounted O-ring seals to prevent leaks and
provide an overall stronger and better seal.
The pump is driven through a heavy duty 2:1 reduction gearbox oil filled
and sealed to prevent the ingress of dust. The ‘Big Berty’ pump comes with a
die-cast, anodised crankcase to provide more lubrication for pump cool running.
The pump motor group is fitted with Aussie Pumps’ ASP (Aussie Safety Protection)
system consisting of a safety valve that protects both the machine and the
operator from pressure spikes.
The machine is fitted with a double gauge double lock off valve system mounted
on a handy control console to simplify the hydrotesting process. An emergency
E-Stop is a standard safety feature on the control panel.
A Rapid 3,000-litre poly tank featuring a large opening for fast filling,
sealed with a lid with a built-in breather, a filter basket and moulded
calibration marks, is part of the equipment. The pipe fill function is carried
out with an Aussie Fire Chief high pressure pump powered by a big Kubota OC95
9.5HP air cooled diesel engine. The pump is close coupled to the electric start
Originally designed for firefighting, the pump is ideal for this
application with its capacity to pump water at up to 100 psi, allowing pipes located
away from the Hydrotest Wagon to be filled. The maximum flow of 450 lpm allows the
pipes to be filled up fast before the actual hydrotest function.
Shelton observes that the Hydrotest Wagon’s robust single unit design will
be accepted within the Australian gas industry for its ability to carry out the
entire hydrotest function without water carts and separate fill pumps. The
system can also be easily converted into a mobile 5,000 psi water blaster.
Aussie Pumps is receiving enquiries for the Hydrotest Wagon from the
Middle East as well as from hire and rental companies who can see the product’s