Company News

Characteristic of casing pipe

Casing is important to oil drilling equipment, and its main equipment includes drill, core pipe and casing, drill collars and drilling small diameter steel pipe and so on. The casing is used to support oil and gas wall of the pipe, to ensure that th...

ERW Pipe's development prospects and facing issues

Resistance welding is short of ERW steel pipe with number of advantages, such as high productivity, low cost, good dimensional accuracy, beautiful appearance. However, in the past, due to the poor reliability of the weld, great limitations on the u...

Forging methods of alloy steel tube

Forged steel pipe can be divided into free forging, upsetting, extrusion, forging, closed die forging, and closed upsetting. Closed die forging and closed upsetting because there is no flash, material utilization is high. A process or several proces...

Analysis of pipeline welding defect

Groups hole At the time of the extinction, the protective effect of the arc and sla is weakening and easy to be prone porosity and other defects in the crater. The extent of the defects can be removed when the next track weld joints, eliminating the ...

Brinell hardness of carbon steel pipe

Brinell hardness (HB) with a certain diameter of the steel balls or tungsten carbide balls, pressed into the pattern surface of a predetermined test force (F), after the predetermined hold time after drop test force, the diameter of the measurement s...

Cement mortar lining anti-corrosion steel pipe

Cement mortar lining anti-corrosion steel pipe refers to a corrosion resistant treatment of the cement mortar in the steel pipe inside the tubular body. Lined with cement mortar lining anti-corrosion steel pipe, steel pipe filled with concrete, wich...