Table of Contents
What is used to make a flare fitting?
Flare fittings are a type of compression fitting used with metal tubing, usually soft steel, ductile (soft) copper and aluminum, though other materials are also used. Tube flaring is a type of forging operation, and is usually a cold working procedure.
What is better flare or compression fittings?
Generally speaking, compression outlets are used for water and compressed air lines, where slight leakage isn’t going to cause too much of a problem. Flared outlets are used for gas and high-pressure lines, where even a little leakage can cause major problems if left unattended.
Are flared fittings made with a special tool?
Typically brass or steel, flare fittings are composed of a threaded body with flared ends, and a nut. They utilize a corresponding flare at the end of the pipe to create their highly secure connection. Creating that flared end is accomplished by using a special tool.
Do flare fittings need sealant?
The threads in a flare fitting are NOT tapered and do not need to be sealed. The seal is between the flared end of the pipe/tube and the tapered face of the other side of the fitting. All the threaded collar does is supply force to create a seal between the opposite tapers of the two ends.
How do you seal flare fittings?
What degree flare are an fittings?
Fitting Flare Angle AN Aircraft Flare fittings have a 37 degree flare angle. Many industrial fittings use a 45 degree flare angle. Most of the time, when you are working on aircraft, the hoses have a 37 degree flare and you don’t think about the flare angle.
Can you over tighten a flare fitting?
Fourth, don’t over-tighten the flare fitting, as this can cause leaks. Daikin offers preset flare torque wrenches that will allow you to properly tighten the flare fitting without over-tightening them. Always use a backup wrench when tightening any flare fitting.
What is the purpose of a flare fitting?
Flared fittings are also a good option for use with heavy machinery, and industrial and construction equipment. They are the fitting is most commonly used to connect tube or hose in high-pressure and high-temperature applications. The flare fitting is commonly used world-wide because it is a simple construction.
What is the first step in installing a flared fitting?
Proper 37° flare fittings assembly and installation steps: Step 1: Check your flared tube, if applicable. Step 2: Align the flare ends and tighten. Step 3: Mark the nut. Step 4: Tighten using recommended flats. Step 5: Make a second mark on the fitting.
What piece of hardware holds flared tubing against a flare fitting?
A flare nut screws into the threads and holds the flared tubing against the flare fitting.
Can Type L copper be flared?
It is possible to flare Types K, L or M rigid or hard temper tube, though prior to flaring it is usually necessary to anneal the end of the tube to be flared. The copper tube must be cut square using an appropriate tubing cutter.
Do you use Teflon tape on a flare fitting?
Do not use Teflon ® tape or pipe sealant on any flare ends because you will not obtain a leak-free seal. Keep flare end of fitting free of grease, oil and thread sealant. Use a wrench only on the hex surfaces of the fittings. tighten more if a leak is detected.
What actually seals the connection in a flare connection?
Design: The 37° flare AN seal is used for sealing tubing to end connections. It requires the end of the tube to have a nut slipped onto it and then flared out using a special tool. To seal properly, the nut is threaded into a flare fitting which clamps the flared tube in between the nut and flare fitting.
Why do flare fittings leak?
Bad flare, burrs on the pipe, wrong size flare, can all cause a flare fitting to leak. The most common reason they leak is because of us overtightening them. I once had a tech tighten one to the point that it blow off during pressure testing.
What type of flare is best for brake lines?
All brake lines need to be double flared, due to the high hydraulic pressure. If your brakes leak or the hoses crack, it could prove to be fatal. Single flared lines are suitable for low-pressure lines in other applications, but not your vehicle’s brakes.
How a leak free fitting is achieved with SAE flare fittings?
Leaking flare joints can be eliminated by installing a conical washer between the JIC nose and flare. The combination of the crush on the ribs and the sealant ensure that a leak-free joint is achieved and helps protect the sealing faces from fretting, galling and over-tightening.
ARE AN fittings the same as flare fittings?
Each AN size also uses its own standard thread size. AN fittings are a flare fitting, using 37° flared tubing to form a metal-to-metal seal. They are similar to other 37° flared fittings, such as JIC, which is their industrial variant.
Can you mix JIC and an fittings?
JIC Steps In The majority of the hydraulic population agrees, the JIC (or SAE) 37 degree fittings are generally interchangeable with AN fittings.
