Any Inflatable Bag Weld Purge System

We are a well-reputed firm that manufacture, export, distribute and supply an extensive range of Inflatable Bag Weld Purge System in Chennai, Tamil Nadu, India.

Backing Gas and Purging solutions for high quality oxide free welds.

Our Inflatable Pipe Purging Systems are designed to maximise time and minimise cost. Two inflatable bladders are joined by a braided gas hose. Using inert gas(such as argon) to first inflate both bladders on either side of the weld before releasing the gas(via a pre set valve) into the chamber they have created, forcing the oxygen out through exhaust tubes built into the bladders. The Oxygen is removed so the welder can weld the pipes without the risk of oxidisation. Once the gas flow is stopped the bags deflate and are easily removed from the pipe. Used in conjunction with our Oxygen Monitors, these systems enable the welder to produce highest quality welds in very little time and with no Oxidisation.

Range 2" to 48"

INFLATABLE PIPE STOPPERS
Inflatable Pipe Stoppers are supplied as standard with no through tube. Through tubes can be supplied when the stoppers are required for weld purging applications.
When deflated, the inflatable stoppers can be inserted and withdrawn with ease.
Each inflatable stopper comes with an inflation hose fitted with a schrader valve enabling inflation with a standard airline, bicycle or foot pump.
We offer a range of shapes and sizes of inflatable stoppers, suitable for all applications. Made from a natural rubber bladder covered in waterproof polyurethane coated nylon to prevent friction and static electricity build up.

There are six different types available

a c Cylindrical
These are generally used for blocking pipes where access is restricted.

a c Spherical
These stoppers have less contact area than cylindrical stoppers, and are most suited to applications where access is further limited. Due to its shape the spherical inflatable stopper can be used at any angle.

a c Square / Rectangular
These stoppers have a variety of applications, including in air conditioning ducting and venting.

a c Doughnut
These stoppers require minimal space and are perfectly suited to larger diameter pipes as there is less inflation required.

a c Sausage
The design of this type gives more contact area between the stopper and the pipe wall enabling these stoppers to hold back more pressure.

a c Heat Resistant
These stoppers are made from a specially designed kevlar and mix material to withstand temperatures up to 932A f/500A c for applications involving higher temperatures such as pre heating.

EXPANDING PIPE STOPPERS

A central spindle/shaft on which two plates are fitted with a natural rubber tyre (ring) between them, a wing nut on the shaft moving the two plates together compressing the tyre and making the seal in the pipe. Natural rubber tyres which can be substituted for different rubbers where additional chemical and/ or heat resistance is required. Alternative rubber ring options are: Silicone, Nitrile & Viton) These can also be supplied with a hollow shaft version for screwing on standard hose connections or for using fixed or free nipple caps. Expandable Pipe Stoppers are available manufactured from Nylon, Aluminium and Steel.

TUBE EXPANDERS
Tube Expanding is the art of reducing a tube wall by compressing the outer diameter of the tube against a fixed container such as rolling tubes into tube sheets, drums, ferrules or flanges.

Construction of heat exchangers, boilers, and surface condenser tubes is mainly limited to copper, steel, stainless steel, and cast iron with exceptions such as the use of titanium in ultra high pressure vessel applications.

To assure a proper tube joint, the tube wall must be reduced by a predetermined percentage dependent upon the material the tube is constructed of. Pneumatic or hydraulic torque rolling devices with an expander are used to expand the end of the tube so it seals against the tube sheet of the vessel.