What does K mean on Compression fittings?
Pipe fittings, valves and bends usually have some associated K factor or local loss coefficient, which allows the calculation of the pressure loss through the fitting for a particular fluid flowing at a specified velocity. Manufacturers of pipe work fittings and valves often publish a fitting’s associated ‘K’ factor.
What is a Conex fitting?
Conex Compression fittings are designed to minimise flow restriction. They are designed with a symmetrical compression ring which provides a seal within the cone of the fitting and capnut providing a two point seal on the tube.
Can you use Compression fittings on carbon steel pipe?
These fittings are suitable for connecting a wide range of tubes, including copper tubes in accordance with EN 1057, carbon steel to EN 10305, stainless steel to EN 10312 and plastic pipes to BS 7291, EN 15875 and EN 15876. Conex Compression fittings are designed to minimise flow restriction.
What is the thread size for a 3/8 compression fitting?
9/16″-18
3/8″ Brass Nut Compression Fitting
| Tube Outer Diameter | 3/8″ Tube |
|---|---|
| Length | 0.56″ |
| Working Pressure | 400 psi |
| Head Type | Hex |
| Thread Size | 9/16″-18 |
What is K in pipes?
The K-value, Resistance Coefficient, Velocity Head, Excess Head or Crane method allows the user to characterise the pressure loss through fittings in a a pipe. The K-value represents the multiple of velocity heads that will be lost by fluid passing through the fitting.
What is the difference between type L and K copper?
Each type represents a series of sizes with different wall thicknesses. Type K tube has thicker walls than Type L tube, and Type L walls are thicker than Type M, for any given diameter. All inside diameters depend on tube size and wall thickness.
Are solder joints better than compression?
Compression fittings are not nearly as robust as soldered fittings making them much more sensitive to powerful stresses. They are not ideal for applications where they could be potentially exposed to lots of flexing, bending and excessive vibration or tube movement.
Can I use brass compression fittings on steel pipe?
It is important to bear in mind that brass compression fittings are better suited to use with copper tubing, and that stainless steel fittings are used for stainless steel tubing. If you do try to use a brass fitting with stainless steel tubing, you will struggle to obtain a proper seal.
How many PSI can a compression fitting hold?
In combination with a high pressure tubing material like steel, large compression fittings can often be used at pressures in excess of 10,000 psig.
What is Type K copper pipe used for?
Type K Copper Pipe Best for: Main water lines, underground installations. Type K copper pipe has the thickest wall of all the common types. It is used for water distribution, fire protection, oil, HVAC, and many other applications in the construction industry. Type K pipe is available in rigid and flexible forms.
Is K or L copper thicker?
Type K is the heaviest. Type L is medium weight and used most often for water lines in homes. Type M is thinner and is used underground or for light domestic water lines if local codes allow.
Should you use Teflon tape on compression fittings?
On NEW compression fittings, PTFE tape is NOT REQUIRED although there are many people that still use it as an added layer of protection against leaks.
How tight should you do up a compression fitting?
Hold the compression fitting body tightly with a pair of grips and tighten the nut with a spanner. Its often said in the trade to not over tighten a compression fitting, leaving you more thread in the case of a leak and not distorting the olive or fitting. Generally a nut will need one whole turn after hand tightening.
Can you use plastic pipe compression fittings?
Compression fittings on plastic pipe A compression fitting works in the same way on a plastic pipe as it does on a copper pipe except that you need to put in a liner, which is there to keep the end of the pipe perfectly round.
Can you over tighten compression fittings?
Is NPT the same as compression?
NPT (ends) look very different than compression (ends). NPT has no nuts or ferrules, but instead relies entirely on a thread connection. Like plastic tubing, the product designation for NPT (and pipe in general) is the internal diameter (ID), not tubing OD like compression.