Variations and connection pipes at an angle

welding Standards angle

Normally, welding steel pipes are mounted.The same method pipeline connecting portions if the valve is made of structural steel or high alloy pipe.Different metals welded fit various technologies and electrodes.Welding or soldering connected as copper and aluminum elements, but this will require a special TIG machine that produces an electric arc in an argon gas environment, as well as an electrode used aluminum and copper wire.

Welding is suitable for plastic pipes, but in this case, special - thermal pressure.This compound was used in the production of fittings which are assembled from pieces cut pipes.

main normative documents regulating the corner welding of pipes is to GOST 16037-80.Pairing an angle for welding pipes is realized with the help of some varieties of joints:

1. angular pair of pipes of the same diameter, edge chamfering not by unilateral weld (GOST-U16).The edges of the pipe is necessary to grind off and adjust to each other without a gap.
2. pipe Pairing with a nipple without sided seam section (GOST-U17, U18).Minimum clearance between the edges.
3. Corner welding with beveling with one-sided seam, which represent cipher U19.The edge of the lower pipe is almost in welding without processing, and on the upper chamfered.
4. welding at an angle with a bevel on the edge of the cylindrical truncated.Running a one-sided seam (U20).The lower edge of the pipe is in operation without treatment.
5. Corner mate section.Inside the tube is placed an annular liner, and make the seam from the outside (U21).

square pipe welded together by the same rules.

Species corner welding

All kinds of welds, whether argon, arc or gas, begins with the fact that it is necessary to adjust the ends.The gap between the elements must be in the range from 0.5 mm to 1.5 mm.

chamfer edges without welding is applied only on the tubes in which the wall thickness is sufficiently small - from 1 to 6 mm.The process of connecting begins with tacking elements spot welds, and then continue to edit the position of the pipe and make ring seam welding on the outer edge.

Corner pair having one-sided end requires a chamfer angle 50 ° made.In section two bilateral chamfer must be at an angle of 30 °.Clearance say 1-2 mm in the first case and 5.2 mm in the second.Therefore, in these cases, an ideal edge elements is not important.This method pipes are joined with a wall thickness of 2 to 20 mm.

At the corner welding with beveling and partition wall thickness should be from 6 to 60 mm, the width of the section - from 18 to 48 mm.Pipes such dimensions are welded by means of a special technique crater fill.