Double Inflatable Purge Bag System x 30″


£484.00 ex VAT £580.80 inc VAT

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Double Inflatable Pipe Weld Purging System x 30″ 

Used for 90% of the traditional pipe weld purging applications to provide bright, shiny, oxide free weld roots. The Pipe Purge Bag Systems are quick and easy to use providing a very rapid weld purge. High quality materials are used in the manufacture of these systems guaranteeing perfect oxide-free weld roots in very little time. 

Due to the design of these systems, the volume of gas used to purge is minimised, resulting in significant savings in both time and the quantity of inert gas used. Return on investment can be achieved in as little as just one or two welds. These robust systems can be used over and over again paying for themselves in very little time.

Features and advantages 

• Inflatable Pipe Purging Systems dramatically reduce purging times leading to significant savings in labour costs. Typical purge times for 4” pipe = 1½ mins; 8” pipe = 4 mins; 12” pipe = 8 mins

• Ready to use, connects to a dedicated and regulated gas supply. Choose any flow rate up to 20l a min. Through the preset purge valve.

• Gas pressure control ensures an even positive root bead with no notching.

• Quick and easy to install simplifying the process of inert gas purging.

• Heat resistant up to 70ºc continuously.

• Use less inert gas. The volume of purge gas used is less than 2% of that required for a conventional purge.

4” Purge Bag System

Luminous strip allows the operator to locate the centre of the bag system to the weld gap with ease.

How it works 

The Purge Bag Systems in the range manufactured by PIPE Ltd are designed around the principle of using 2 dams to create a seal either side of the weld, just far enough away from the weld not to be effected by heat but close enough to the joint to provide the fastest weld purge time. These dams are connected by an armoured spinal tube.

Once ready to start purging, the system is inserted into the bore of the pipe using the luminous strip to centre the system to the weld gap.

When the gas flow is started, the dams inflate and, upon reaching the pre-set pressure, the valve releases the gas gently into the weld chamber, to purge the interspace without turbulence.

The Oxygen is removed from the weld chamber through the integral exhaust tubes in the bags.

Used in conjunction with PIPE Ltd’s Oxygen Monitors to indicate when the required low level of oxygen has been reached, welding can then commence, with the inert gas enabling the welder to produce an even oxidation free penetration weld bead. Afterwards, the dams are deflated simply by disconnecting the purge gas feed and the system easily withdrawn. The design of these systems means that only one gas connection is required for both dam inflation and weld purging.

Sizing and specification 


PB02            50 mm               2″             0.34 kg              44 – 57 mm

PB03             75 mm              3″            0.34 kg              58 – 84 mm

PB04          100 mm               4″             0.34 kg              80 – 110 mm

PB05          125 mm              5″            0.38 kg            103 – 135 mm

PB06          150 mm              6″             0.38 kg             124 – 162 mm

PB08          200 mm               8″            0.90 kg             175 – 213 mm

PB10          250 mm            10″            1.0 kg               230 – 265 mm

PB12          300 mm             12″            1.1 kg               265 – 305 mm

PB14          350 mm            14”            1.3 kg              330 – 355 mm

PB16          400 mm            16”            1.7 kg              380 – 405 mm

PB18          450 mm             18”            1.8 kg              430 – 455 mm

PB20          500 mm            20”            1.9 kg              485 – 510 mm

PB22           550 mm             22”            2.2 kg              535 – 560 mm

PB24           600 mm            24”            2.5 kg              585 – 610 mm

PB26           650 mm            26”            2.8 kg              635 – 660 mm

PB28          700 mm            28”            3.1 kg              685 – 710 mm

PB30          750 mm            30”            3.4 kg               735 – 760 mm

PB32          800 mm            32”            3.8 kg              785 – 810 mm

PB34           850 mm             34”            4.2 kg               835 – 860 mm

PB36          900 mm            36”             4.5 kg               885 – 910 mm

PB40        1000 mm           40”              5.0 kg              990 – 1015 mm

PB42        1050 mm           42”             5.5 kg            1040 – 1065 mm

PB48        1200 mm           48”             6.0 kg            1195 – 1220 mm

PBS401 30 metre argon feed hose assembly for connecting PIPE Purge Bag System to dedicated and regulated gas supply. Fitted at one end with a 3/8” female gas regulator connector and at the other end with a fitting to attach to the inflation hose.

Technical Data Sheet

A carriage charge is applied to orders, for standard 1-2 day shipments to mainland destinations within the United Kingdom. Other destinations and premium services are available but subject to additional freight charges.


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