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With the continuous increase in the delivery pressure and steel grade of oil and gas pipelines, the requirements of ERW steel pipes for oil and gas transportation are also increasing. The number of ER...

Petroleum special pipe is mainly used for oil and gas well drilling and oil and gas transportation. It includes oil drilling pipe, oil casing pipe, and oil suction pipe. Petroleum drill pipe is mainly...

In the construction of long-distance pipelines, steel pipes account for a large proportion. Generally, 35% to 40% of pipeline investment accounts for the total investment of the project. How to choose...

ERW steel pipe is in accordance with API-5L standard or GB / T 9711.1-1997 standard. These standards do not specify the temperature range of ERW welded pipe, and the discussion is as follows: 1. Regar...

Hot rolled seamless steel pipe: Hot rolling is relative to cold rolling, cold rolling is rolling below the recrystallization temperature, and hot rolling is rolling above the recrystallization tempera...

According to the function of petroleum casing pipe, it can be pided into surface casing, technical casing and oil layer casing. 1) Surface casing of petroleum casing: 1. It is used to block the unstab...