Welding technology for hydrogenation reactor end socket connecting pipe
A hydrogenation reactor and welding process technology, which is applied in welding equipment, metal processing equipment, manufacturing tools, etc., can solve the problems of high equipment cost, low production efficiency, and complexity
Inactive Publication Date: 2015-05-20
QINGDAO XUSHENG HEAD
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Problems solved by technology
[0004] At present, the welding process of the head of the hydrogenation reactor is complicated, the equipment cost is high, and the production efficiency is low.
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment
[0013] The process includes: dry magnetic particle inspection of welding groove → preheating → assembly, spot welding → submerged arc automatic welding of outer groove → welding of outer groove → post-heating. The preheating temperature is ≥200°C, the interlayer temperature of the welding outer groove is 200-250°C, the post-heating temperature is 200-300°C, the post-heating time is 2h, the welding current is 500-550A, the welding voltage is 28-30V, and the welding The speed is 360-400mm / min.
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The invention discloses a welding technology for a hydrogenation reactor end socket connecting pipe. The technology includes the steps of groove welding dry magnetic powder detecting, preheating, assembling and spot welding, outer groove union melt welding, outer groove welding and after-heating. The preheating temperature is larger than or equal to 200 DEG C, the interlayer temperature for outer groove welding is 200-250 DEG C, the after-heating temperature is 200-300 DEG C, the after-heating time is 2 h, the welding current is 500-550 A, the welding voltage is 28-30 V, and the welding speed is 360-400 mm / min. Equipment cost is low, the production efficiency is high, operation is simple and convenient, and the welding precision is high.
Description
[0001] technical field [0002] The invention belongs to a welding process for a head joint, in particular to a welding process for a head joint of a hydrogenation reactor. [0003] Background technique [0004] At present, the welding process of the head of the hydrogenation reactor is complicated, the equipment cost is high, and the production efficiency is low. [0005] Contents of the invention [0006] In order to overcome the above-mentioned defects existing in the prior art field, the object of the present invention is to provide a hydrogenation reactor head joint welding process, which is easy to operate. [0007] The welding process of the head of the hydrogenation reactor provided by the present invention includes: dry magnetic particle inspection of welding groove → preheating → assembly, spot welding → automatic submerged arc welding of outer groove → welding of outer groove → post-heating. The preheating temperature is ≥200°C, the interlayer temperature of...
Claims
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Patent Timeline
Login to View More IPC IPC(8): B23K9/18B23K9/235
CPCB23K9/18B23K9/235
Inventor 杜学梅
Owner QINGDAO XUSHENG HEAD