TH14095B - Pipe welding method - Google Patents

Abstract

DC60 (11/10/43) Method for welding the ends of two pipes at an open base. Between the ends that have been spaced with STT's arc welding machine which consists of Selection of welding rods containing carbon 0.06 - 0.015% by weight, manganese 0.90 -1.40% by weight and silicon 0.45 - 0.75% by weight, as well as phosphorus, stainless steel alloys and sulfur. At the specified percentage ratio Of the selected wire In the specific size range 0.015 to 0.035% by weight and maintaining phosphorus at the specified percentage level of The wire that has been selected. In the specific range, which is approximately 0.015% less, the method of welding the ends of two pipes at the open base. Between the ends that have been spaced with STT's arc welding machine which consists of Selection of welding rods containing carbon 0.06 - 0.015% by weight, manganese 0.90 -1.40% by weight and silicon 0.45 - 0.75% by weight, as well as phosphorus, stainless steel alloys and sulfur. At the specified percentage ratio Of the selected wire In the specific size range 0.015 to 0.035% by weight and maintaining phosphorus at the specified percentage level of The wire that has been selected. In the prime range, which is approximately 0.015% less.

Claims (9)

1. A method of welding the ends of two tubes at an open base between the well spaced ends. The method consists of (a) selection of welding electrodes containing 0.06-0.15% carbon by 0.9-1.40% manganese weight by Weight and silicon, 0.45-0.75% wt, including phosphorus, copper, alloys of stainless steel and sulfur (b). Maintaining such sulfur at the specified percentage ratio of the wire at The phosphorus retention was selected in a specific range from 0.015-0.035% by weight (c). The phosphorus retention was at the specified percentage level of the wire. (D) The displacement of the selected electrode is directed at the specified wire feed rate to the base. Such an opening between the two pipe ends. To connect the ends of the pipes together by placing an open base. As mentioned in the first weld, (e) generates a controlled welding current with a controlled waveform. The waveform will Including the respective welding cycle, each of which will have a short circuit. And the plasma arc by section The plasma arc will include the plasma stimulation sector. The tail section and the background current, respectively (f) the movement of the welding wire along the open base while the welding current Through the wire to make the wire melt. And move that melted wire by It is transported with surface tension to the end of the tube in such open bases and (g) such current waveforming by the fast sequence current pulses generated by the oscillator at a rate of at least 18 k KHz, and with amplitude controlled by the pulse width modulator 2. The method is defined in Clause 1 where the percentage level is defined. The amount of phosphorus was in the range of approximately 0.006-0.008% by weight. 3. Method as defined in Clause 2. The amount of sulfur in the range is approximately 0.025-0.035% by weight. 4. Method as defined in Clause 2 in which the stainless steel alloys are At a specified percentage ratio of less than 0.50% by weight 5. Method as set out in Clause 4 in which alloy of stainless steel will It is selected from a group consisting of nickel, chromium, molybdenum, vanadium, and a mixture of these metals. 6. Method as set out in Clause 1, where the percentage ratio is defined. Of sulfur in the range of 0.025-0.035% by weight 7. Method as specified in Clause 6, where copper is at the percentage ratio 8. The method as defined in Clause 4 in which the alloy of stainless steel is located is less than 0.50% by weight. At the specified percentage ratio of less than 0.50% by weight 9. The method set out in Clause 8 in which the alloy of stainless steel will It was selected from a group consisting of nickel, chromium, molybdenum, vanadium, and a mixture of these metals 1 0. Method as set out in claim 1, where copper is at the ratio level. Percentage given that is less than 0.50% by weight 1. 1. Method as set out in Clause 10 in which the alloy of stainless steel In the percentage ratio set to less than 0.50% by weight 1 2. Method, as set out in Clause 11, which alloys of stainless steel Are selected from a group consisting of nickel, chromium, molibdenum, vanadium and a mixture of these metals. 3. Method as defined in Clause 1, which alloy of stainless steel In the percentage ratio set to less than 0.50% by weight 1 4. Method, as set out in Clause 13, which alloys of stainless steel Are selected from a group consisting of nickel, chromium, molibdenum, vanadium and a mixture of these metals. 5. Method as set out in Clause 1, which alloys of stainless steel Are selected from a group consisting of nickel, chromium, molibdenum, vanadium and a mixture of these metals. 6.Method as set out in claim 1, including filling of joints over metal. As said in such an open position After the first weld with the 1 added electrode 7. Method as set out in Clause 16 in which the filled welding rod breaks. Unlike the aforementioned welding wires 1 8.The method set out in Clause 17, in which the aforementioned welding electrodes shall be Welding rod with 1 core 9. The method set out in Clause 16, whereby the filled wire shall be wire. Welding electrodes with such a core.