Production method of full-docking oil tank heater assembling pipe

Abstract

The invention relates to a production method of full-docking oil tank heater assembling pipes. The invention mainly solves the problems that cast assembling pipes have sand holes and the pipe joints on the assembling pipes pushed by a push bench are too short for flaw detection. The method comprises the following steps: producing a pair of molds with the same shape and size as a longitudinally-cut half of an assembling pipe or an assembling pipe with a tee joint at the lower end and also with the same shape and size as the other half, producing an assembling pipe with two half surfaces or an assembling pipe with two half surfaces that have a half tee joint at the lower ends of the half surfaces by a hot press molding method, and welding together the assembling pipe with two half surfaces or the assembling pipe with two half surfaces that have a half tee joint at the lower ends of the half surfaces. The advantages are that the problems that cast assembling pipes have sand holes and the pipe joints pushed by a push bench are too short for flaw detection are overcome, and the quality of the products are guaranteed.

Description

Technical field: [0001] The invention relates to a production method of a fully butted oil tank heater assembly pipe. Background technique: [0002] The existing oil tank heaters are connected by several groups of heaters, and each group of heaters includes a collection pipe (standpipe) and a horizontal heating row pipe, and the heaters of each group are connected by connecting pipes. The disadvantage is that the heating row The connection method of the pipe and the connecting pipe and the assembly pipe is to open an opening on the assembly pipe, and insert the heating pipe or the connection pipe into the opening for welding. The flaw detection machine cannot be used for this kind of fillet weld. I have tried the method of casting The advantage of producing the assembly pipe is that the connection between the assembly pipe, the heating pipe and the connecting pipe is cast with a pipe joint, and there is a tee at the lower end of the assembly pipe, so that they can be connect...

AI Technical Summary

Problems solved by technology

[0002] The existing oil tank heaters are connected by several groups of heaters, and each group of heaters includes a collection pipe (standpipe) and a horizontal heating row pipe, and the heaters of each group are connected by connecting pipes. The disadvantage is that the heating row The connection method of the pipe and the connecting pipe and the assembly pipe is to open an opening on the assembly pipe, and insert the heating pipe or the connection pipe into the opening for welding. The flaw detection machine cannot be used for this kind of fillet weld. I have tried the method of casting The advantage of producing the assembly pipe is that the connection between the assembly pipe, the heating pipe and the connecting pipe is cast with a pipe joint, and there is a tee at the lower end of the assembly pipe, so that they can be connected with the heating pipe, the connecting pipe and the connecting pipe. The welds at the joints with the bottom heating pipe and the bottom connecting pipe are all butt welds, which are convenient for flaw detection, but the disadvantage of casting is that there are sand holes and easy to leak; I have also tested that the connection between the assembly pipe and the heating pipe The joint of the pipe is ejected by the ejector, but because the ejected pipe joint is short, the butt weld is too close to the assembly pipe, which cannot meet the operating space of the flaw detection machine, so the flaw detection cannot be performed, resulting in products with potential leakage for production

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