Without etiquette, a man cannot be born; without etiquette, a matter cannot be accomplished; without etiquette, a country is not at peace--Xunzi's “Cultivating one's moral character”.

In order to ensure the quality of welding, the galvanization of the weld should be treated, first of all, the galvanized layer of the weld should be polished off, and the galvanized layer should be cleaned up by a hand wheel or sandpaper, or the galvanized layer should be cleaned up by a gas welding flame. Otherwise, it will produce bubbles, trachoma, false welds, etc.. It will also make the weld brittle, rigidity decline, etc. .

Spiral steel pipe is a low carbon carbon structural steel or low alloy structural steel steel strip rolled into a billet according to the angle of a certain spiral line (called the molding angle), and then made by welding the pipe seam, it can be made with a narrower strip to produce a large diameter steel pipe. Its specifications are expressed in terms of the outer diameter * wall thickness, welded pipe should ensure that the hydrostatic test, tensile strength of the weld and cold bending properties to comply with the provisions.

The basic principle is to install two fixed-length grating scales on the outside of the two ends of the straight seam steel pipe, the grating scales are driven by the rods near the ends of the steel pipe, and the length of the straight seam steel pipe is measured by the interference phenomenon of light. It is characterized by high accuracy. However, the scale is expensive and difficult to maintain, so it is sensitive to the effects of dust and site vibration.

“Firmly establish and practice the concept that green mountains are golden mountains, and plan for development at the height of the harmonious coexistence of man and nature.” Centerway Steel actively take action to “innovation” as a breakthrough, “quality” as the overall goal, and continue to promote carbon reduction, emission reduction, energy saving and other environmental protection and governance measures, writing the sky is more blue and the mountains are greener, high-quality and efficient development of the iron and steel answer sheet.

Spiral steel pipe production process is simple, high production efficiency, into the material to produce a larger diameter welded pipe, but also with the same width of the billet to produce a different diameter welded pipe. However, compared with the same length of straight seam pipe, the length of welded seam increases by 30~100%, and the production speed is lower.

The reason why LSAW steel pipe is widely used in the market is due to its own unique characteristics. The relatively low cost of the process used in the welding process and the fact that straight seam steel pipes can be manufactured using the fabrication processes of forging steel, extrusion, rolling and drawing steel, and that their specifications are relatively defined, offer the possibility of wide application.

Dubai five industry exhibition - Middle East Dubai building materials exhibition (BIG5) is the Middle East region's most influential and is the largest construction, building materials and services exhibition. Started in 1980, while its derivative exhibition Middle East five industry construction machinery, vehicles and equipment exhibition (BIG 5PMV) is focused on the Middle East region construction equipment, machinery, tools and vehicles of professional exhibitions. Nowadays, the hot and continuous development of the construction market in the Middle East has driven the strong demand for construction equipment, materials, construction machinery and vehicles, and attracted more global attention.

Underwater welding square tube, the equipment and power supply used should have good insulation and waterproof performance, its insulation resistance value shall not be less than 1MΩ, and should have anti-salt spray corrosion, atmospheric corrosion and seawater corrosion resistance.

By detailing the welding process and precautions for 304 stainless steel pipe, some key knowledge and guidance is provided. Material preparation Preparation: before the welding of 304 stainless steel pipe, it is necessary to carry out adequate material preparation. This includes cleaning the surface of the pipe to ensure that there is no grease, oxides and other dirt present.