Special-shaped flange for pipeline hard seal connection

Abstract

The invention provides a special-shaped flange for pipeline hard seal connection. The special-shaped flange for pipeline hard seal connection comprises a connecting male end, a connecting female end and an outer sleeve flange, wherein the connecting male end is arranged in the connecting female end in a penetrating way; a sealing layer is arranged between the connecting male end and the connectingfemale end; the outer sleeve flange sleeves the outer side of the connecting male end and is fixedly connected with the connecting male end. According to the special-shaped flange for pipeline hard seal connection provided by the invention, a sealed connection manner with the cooperation of the connecting male end, the connecting female end and the outer sleeve flange replaces an original weldingmanner so as to connect two groups of pipelines in a sealing way; through the special-shaped flange provided by the invention, sealed connection can be conveniently carried out on the spot, and the construction speed can be accelerated; the connecting male end and the connecting female end can be conveniently subjected to relevant preservative treatment, so that the problems of cracking and perforation of an original pipeline welding joint can be solved, and the giant loss caused by cracking and perforation of the welding joint is directly reduced; and in addition, the wall thickness of the part on which the connecting male end and the connecting female end crossing and sleeving mutually is larger, so that the overall preservative time is longer, and the pressure-resistant performance isbetter.

Description

technical field [0001] The invention relates to the hard-sealed connection of pipelines, in particular to a special-shaped flange used for the hard-sealed connection of pipelines. Background technique [0002] my country's pipelines often have problems such as pipeline bursts and perforations during long-term operation. According to statistics, more than 90% of pipeline perforation and bursts are caused by welds. This situation has caused serious environmental pollution. It also causes serious economic losses to the enterprise. [0003] Since the welding of long-distance oil and gas pipelines is carried out on the construction site, the welder's technology, pipe diameter, wall thickness, steel grade, and terrain and landform along the pipeline will cause defects in the weld seam during pipeline welding, such as pores, Slag inclusions, lack of fusion, lack of penetration, cracks and other welding defects. Due to the defects of the welding seam, there will be problems such ...

AI Technical Summary

Problems solved by technology

Due to the defects of the weld, there will be problems such as leakage and bursting in the later operation process. At the same time, the working environment of the welding operation on the construction site is harsh, and the entire construction period is also long.

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