Arc striking is the process of igniting welding arc at the beginning of arc welding.

During and after welding, the welding parts will deform. The thermal deformation during welding and the rigid condition of the parts to be welded are the basic factors affecting the deformation.

High carbon steel refers to the carbon steel with w (c) higher than 0.6%, which has a greater hardenability tendency, is sensitive to the formation of cold cracks, and the weldability of high carbon steel is poor. Special welding process is needed to ensure the joint performance. In welding structure, it is rarely used.

Affected by various factors, it is expected that in 2023, China's steel market demand will be strong internally and externally weak, the release pressure of steel production is still relatively large, and the price will continue to fluctuate in a wide range. There is no overwhelming unilateral tendency. It is estimated that there is a difference of about 1,000 RMB/Ton between the trough and the peak of the steel products price in the whole year, but the price center position may move up.

Generally, the common cutting method of straight seam steel pipe is gas cutting. Gas cutting is to use the heat generated by the combustion of oxygen and acetylene to melt the cut metal at high temperature to produce iron oxide slag, and then blow the slag away from the metal with high-pressure oxygen flow.

Now, Let's us discuss the technical terms of steel pipes with you

The technical requirements galvanized steel pipe should reach. 1, grades and chemical composition. Galvanized steel grades and chemical composition shall comply with the stipulated GB3092 standard of black steel pipe steel. 2, the manufacture method: the manufacturing method of black steel pipe (furnace or electric welding) should be selected by the factory. Galvanized by hot dip galvanizing.

Process equipment distinction: cold drawn seamless steel pipe is usually 0.5 ~ 100T single-chain or double-chain cold drawn machine. Finished seamless steel tubes are usually carried out on a two-roll mill where the steel pipe is rolled in a ring-shaped bore formed by a variable cross-section round hole and a stationary tapered head.

ERW welded steel pipe: High frequency electric resistance welded pipe, raw material is hot rolled steel plate, through the continuous forming, bending, welding, heat treatment, sizing, straightening, cutting process.

Working pressure and diameter of oil and gas pipelines, are first identified in pipeline design framework technical parameters. Working pressure directly determine the number of pumping stations and compressor stations, steel consumption in the power station unit and piping.