Steel pipe expansion oil composition and its application

Abstract

The invention relates to a steel pipe expansion oil composition and its application, which mainly solves the problem that in the prior art, due to insufficient cleaning performance of the expansion oil, the remaining diameter expansion oil on the inner wall after processing large-diameter steel pipes is not easy to be emulsified and washed by water. The effect of the pipeline on the anti-corrosion process of the inner wall of the pipe fittings is greatly reduced, and it cannot meet the requirements of the oil cleaning performance after the diameter expansion of the large-diameter LSAW steel pipe. The composition of the present invention includes the following components in parts by weight: a) 5-10 parts of extreme pressure anti-wear agent; b) 30-60 parts of surfactant; c) 5-10 parts of anti-rust agent; d) 5 parts ~10 parts of thickener; e) 0.05~0.1 part of defoamer; f) 10~40 parts of base oil. It can be used in the industrial production of steel pipe diameter expanding oil composition.

Description

technical field [0001] The invention relates to a steel pipe diameter expanding oil composition and its application. Background technique [0002] Steel pipe expansion oil is mainly used for lubricating the working part of the expansion head in the production of steel pipes, such as the large-diameter longitudinal submerged arc welded pipes for the main line of the national key project of the West-East Gas Transmission Project. During the process of stress, steel pipe expanding oil, as a supporting lubricating material for this special process, can keep the two working surfaces of the sliding and guiding friction pairs of the pipe wall and expanding head lubricated. The oil film can keep all friction surfaces from being damaged under high pressure. At the same time, it is also required that the expansion oil of the steel pipe can be quickly detached from the inner wall of the steel pipe by water spraying after use, and the emulsion wastewater can be treated by chemical sedim...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that due to the lack of cleaning performance of the expansion oil in the prior art, after the diameter expansion of large-diameter steel pipes, the residual expansion oil on the inner wall of the steel pipe is not easy to be washed by water emulsification, and the subsequent anti-corrosion treatment process for the inner wall of the pipe The effect is greatly reduced, unable to meet the oil cleaning performance requirements of large-diameter longitudinal submerged arc welded steel pipes after diameter expansion

The technical solution of optimizing the combination of extreme pressure antiwear agent and surfactant solves the problem of insufficient oil cleaning performance caused by unilaterally focusing on lubricating performance in the existing technical solution, and provides a new steel pipe expansion oil composition

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