In the construction of long-distance pipelines, with a large proportion of steel lines, in general, the line pipe investment accounts for 35% to 40% of the total project investment. How to choose a reasonably priced, high performance pipe is particularly important, a reasonable choice to save investment in pipe construction, to facilitate the construction and safe operation of the pipeline system has a very important impact. The advantages of LSAW steel pipe allow it to be widely used for its unique long-distance oil and gas pipelines.

Advantages of LSAW steel pipe

(1) No need for unwinding process, less indentation and scratch of base material.

(2) Staggered edges, slotting, etc. facilitate perimeter control and excellent welding quality.

(3) Elimination of the flanged edge basically does not exist after the residual stress.

(4) Because it is straight line welding, the weld seam is short and the risk of defects is small.

(5) After flaring, the geometric accuracy of the pipe is improved, which greatly facilitates on-site welding.

(6) Because it is straight seam, it has less influence on the quality of anti-corrosion coating material.

LSAW steel pipe specification standards

JCOE steel pipe forming, a weld seam, submerged arc welding process, specifications range from 325mm - 1420mm. when the diameter of the LSAW pipe is greater than 914.4 standard provisions allow the steel pipe has two straight weld seams. LSAW pipe products implement GB/T3091-2008 low pressure fluid steel pipe standard, GB/T9711.1(2)-1997 petroleum and natural gas pipeline implementation standards, ASTM A252 welded structural steel pipe U.S. implementation standards.

Flexible production process of LSAW steel pipe

The production process of LSAW pipe is flexible to produce any specification and wall thickness within the range, and the production efficiency is lower than that of high frequency LSAW steel pipe and spiral welded steel pipe. The biggest advantage of LSAW pipe is that it can produce high frequency steel pipe, spiral steel pipe, and even seamless steel pipe can not produce the specifications. The production cost of LSAW pipe is higher than that of high-frequency steel pipe and spiral steel pipe, but there is a lot of room for price concessions compared to seamless steel pipe. LSAW pipe can produce high frequency steel pipe as well as spiral steel pipe can not produce the material, such as high frequency steel pipe is usually the production of common domestic specifications, and mass production inventory, usually material Q235B, Q345B, other harder steel plate material high frequency equipment and spiral equipment domestic can not be produced. Longitudinal submerged arc welded pipe in the domestic heavy steel structure engineering and fluid pipeline engineering, foundation piling project is widely used.