Cold Welding
For the added safety, efficiancy and durability
Couplings
At Jarmo we provide installation of Lokring and Pyplok fittings as an alternative to on-site welding. The unique metal-to-metal seal of the connections provides extraordinary sealing integrity in both liquid and gas services. No other connector (flanged or threaded) is capable of passing helium leak testing anywhere close to the level of a Lokring fitting. In fact, the fitting meets all criteria of a welded connection, except that heat is not required to make the connection.
Check out some of our previous installations:
Repair Couplings
Repair Couplings are designed to join or repair two sections of pipe, allowing for a quick and easy fix. These couplings are made without a center pipe stop, which makes repairs more flexible as the pipe can move freely.
Regular Couplings
These couplings has a stopper on the inside, which allows for the pipe to stop inside the fitting at a certain point. This effectively places the pipes precisely in relation to each other, which is useful when you want to ensure the correct location and depth of the pipe connection.
More on Couplings
By eliminating the welding process, a significant portion of overhead costs related to safety, personnel, equipment, supplies, inspections, rework, and monitoring can be removed or greatly minimized. To name a few, the repair/installation process avoids the need for: Fire watch and hot work permits, scaffolding and regulated ventilation, designated welding-only zones, gas-free and weather-protected areas, welders, Non-destructive testing (NDT) and
maintaining and monitoring flanges for leaks.
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Lokrings come in four different material grades, suitable for A106B, A333 G6, A312/316, and CuNi pipes. Compatible pipe sizes go from 1/2" to 4", as couplings come in nine different sizes.
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Our couplings are supplied by our trusted supplier, Lokring Scandinavia (ScanLok AS). The Lokring Couplings offer a wide range of secure and reliable solutions to pipe connections, and Jarmo have years of experience with a broad selection:
Pyplok
The PYPLOK® connecting system is another weld-less, thread-less way to join pipes. It has a successful history in the most demanding environments where fire safety is essential as well as a quick and easy solution to maintenance repairs.
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Using a portable, hand-held installation tool, couplings are cold worked and permanently compressed onto the piping, thus forming a permanent leak-tight seal.
The couplings have three seals: a metal-to-metal seal, an inner o-ring seal and an outer o-ring seal.
Applications
PYPLOKs are used as a hybrid solution along with prefabricated pipe spools for both new installations, repairs and maintenance of pipe systems. The couplings qualify for pipe dimensions of 1/4'' to 4'', and has a wider selection of materials than lokrings: Stainless, Carbon, Copper Nickel, Duplex, Super Duplex, 6MO and Titanium among others.
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Allowable pressure range up to 9,300 PSI (640 BAR), with an operating temperature range of –26° C to 205° C.
Questions about couplings?
Contact our Coupling Departement