Installation scheme of stainless steel water supply pipe (ring pressure installation)

1, materials and equipment

Main materials: thin-walled stainless steel pipes for building water supply and special fittings for ring pressure connection.

Main machines and tools: electric or manual pipe cutter, ring pressing tool, etc.

2. Process flow?

Inspection of pipes and fittings → pipe cutting → ring pressure connection → pipe laying → pressure test flushing.

3. Inspection of pipes and fittings?

Pipes and pipe fittings shall have the product inspection report of the product inspection institution recognized by the state and the product ex-factory quality guarantee. ?

Drinking water pipes and fittings should also have the approval documents of the health department. ?

The wall thickness of the pipeline shall meet the design requirements.

4. cut the pipe?

1) Electric or manual pipe cutter shall be used for pipe cutting. When cutting or grinding with grinding wheel, special grinding wheel should be used. ?

2) After the pipe is cut, the burrs inside and outside the pipe end shall be removed. ?

3) When the end face of the pipe is not round and the pipe fitting cannot be inserted, a special shaper should be used to shape the pipe section until the bottom end of the socket of the pipe fitting can be inserted. ?

4) The end face of the incision should be smooth, without cracks, burrs, bulges, necking and residues. The deviation of the inclination (perpendicular to the central axis of the pipe) of the end face of the incision should not be greater than 5% of the outer diameter of the pipe and should not exceed 3 mm; The concave-convex error shall not exceed 65438 0 mm. ?

5. Ring pressure connection?

1) For the annular pressure connection of stainless steel pipes, the annular pressure pliers of corresponding specifications and models shall be selected according to the nominal diameter of the pipes. ?

2) Install the pressure ring mold on the chuck, assemble the fixture and the press block, and conduct the pressure ring connection operation. Before crimping, every 3 ~ 5 pipe fittings, add a little lubricating oil to the pressure teeth at the four corners of the upper and lower pressure blocks, and keep the molds in the upper and lower ring crimping pliers clean before operation. 7 The pipe shall be inserted vertically into the pipe fitting, and shall not be skewed.