2 ways to cut into a pipe under pressure with and without welding

2 ways to cut into a pipe under pressure with and without welding

When upgrading a heating or water supply system, it may be necessary to cut into a pressurized pipe. This is more difficult than driving into a blocked highway, but it is quite possible, and without much risk of getting wet.

Materials:


  • steel thread for welding or clamp for insertion;
  • ball valve;
  • linen or fulenta.

Method 1. Insertion with welding


2 ways to cut into a pipe under pressure with and without welding

The pipe is stripped from paint to bare metal.
2 ways to cut into a pipe under pressure with and without welding

Then the thread is welded to it. This is done as carefully as possible without any omissions.
2 ways to cut into a pipe under pressure with and without welding

Flax or fumlenta is screwed onto the thread, and a ball valve is installed.
2 ways to cut into a pipe under pressure with and without welding

2 ways to cut into a pipe under pressure with and without welding

Next, you need to open the tap and drill a pipe through it. It is optimal to use a cordless tool and the widest drill bit that can fit without damaging the faucet ball. The drill or screwdriver is covered with a bag or cardboard. You need to wear a mask or goggles, as the pressure of the water after drilling will throw the drilling chips straight into your face.
2 ways to cut into a pipe under pressure with and without welding

As soon as water flows from the pipe, you must quickly remove the drill and close the tap. If there are smudges on the seam, you will need to drip a little welding.
2 ways to cut into a pipe under pressure with and without welding

Method 2. Tapping without welding


2 ways to cut into a pipe under pressure with and without welding

For this method, you will need to buy a special clamp for the insert.
2 ways to cut into a pipe under pressure with and without welding

It is clamped onto a pipe with a rubber gasket.
2 ways to cut into a pipe under pressure with and without welding

Then a tap is screwed onto it and drilling is performed in the same way.
2 ways to cut into a pipe under pressure with and without welding

Both methods are used by professional plumbers, but for a person without experience in welding or with inconvenient access to the pipe, it is better to use a clamp. The main thing is not to forget to install the rubber seal.
2 ways to cut into a pipe under pressure with and without welding

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Comments (4)
  1. Saveliy-house
    #1 Saveliy-house Guests 17 September 2020 21:19
    3
    Funny phrase: "Then the thread is welded to it."
    I'm not a professional plumber, but it looks like this piece of pipe with threads is called a squeegee.
    1. Guest
      #2 Guest Guests 19 September 2020 09:41
      2
      A squeegee is a piece of pipe with pipe threads at the ends. At one end the thread is short (5-6 threads), at the other it is long (20....30 threads). A bend is most often used to connect two fixed pipelines when neither of them can be rotated.
      And this is what is called carving.
    2. Raisa Krivenko
      #3 Raisa Krivenko Guests 22 October 2020 19:47
      0
      A “thread” is a short piece of pipe with a thread on one side, and a squeegee is a piece of pipe with a thread on both sides, and of different lengths.
  2. Guest Vasily
    #4 Guest Vasily Guests 18 September 2020 16:34
    3
    You can do without leakage at all if you make an adapter with a thread and an oil seal for the drill shank. important point! The oil seal must be located on the drill shank when the end of the drill is positioned outside the tap.