Joining Two Steel Pipes

Connecting together galvanized pipes that are non threaded uses a coupling that creates a sealed joint.

Joining two steel pipes.

In each description we will list the different plumbing systems and which pipe joining methods apply and finally the benefits and drawbacks of each. Screw both sections of pipe into their respective fittings. Even though push fittings are easy you still have to do your homework. Start by liberally coating the threads of the pipe with pipe dope or wrapping the threads with ptfe tape.

It is important to know the type of coupling to use for galvanized pipe and the fitting procedure so the pipe is leak free. Galvanized pipe has a zinc coating that is either rough or smooth depending on the type of zinc and steel heating process. Insert the ring nut over one of the sections of pipe. Two union nuts and a ring nut.

The union nuts attach to the replacement sections of pipe where they join together. Female gas pipe threads on both sides. Read the instructions on the type of fitting you re using to see how far the pipe needs to be inserted and make a mark on the pipe at that length to ensure. Make sure the pipe joint compound or tape go into the threads to ensure a water tight connection.

When the filler metal cools it bonds the two pieces of metal. Joining galvanized iron fittings to galvanized steel pipe requires pipe dope or ptfe tape and two pipe wrenches. Subsequent to the symposium asm international published a book joining of stainless steels. There are three main methods of joining pipes together and attaching fittings to them.

Smaller lines are usually joined by socket welding or screwing. The photo shows how to use common plumbing parts to join a new ball valve and a flexible stainless steel connector to steel pipe. The valve shown has 1 2 in. Read down below to find out how to join two pieces of metal without welding.

Lines of 2 inch or larger are usually butt welded this being the most economic leak proof method. Committee of stainless steel producers american iron and steel institute 1133 15th street nw washington dc 20005 u s a in co operation with asm international formerly american society of metals metals park oh 44073 u s a. Some of these alternatives to welding methods require heat while some don t require heat at all. Pipe joining methods soldered this is the process of joining pipe by melting a filler metal with a low melting point into a joint.

The union is a fitting that consists of three components. The ring nut acts to join the two pieces. There are numerous methods for joining metals without welding.