What are the specific applications of spiral steel pipes in pipeline transportation?

With the development of society and the development of offshore oil and gas, submarine pipelines have experienced rapid growth, which of course places increasingly high demands on pipelines. The large diameter and high strength of spiral pipes make them the preferred pipeline for long-distance pipelines due to their practical characteristics. In fact, spiral pipe transportation has many advantages, but one is the lack of volumetric strain capacity. However, due to the high solidification point and waxy crude oil content exceeding the design capacity, the existing pipeline's pressure bearing and pumping capabilities are limited; Below the design, adjust the existing pipeline thermal conditions. To overcome fixed points, only drag reducers and pour reducers can be used. At present, there is a summit on the development of China's secondary pipeline industry. The development of spiral steel pipes in Fuzhou will also invest in improving pipeline transportation capacity.

With the increase of the strength and diameter of the spiral tube, due to the lack of awareness of the importance of impact toughness, there are fragile and elastic pipeline rupture accidents in many parts of the world. The toughness index of steel pipes and welded pipes has actually become an important indicator. Unstable propagation and expansion of ductile cracks in spiral welded pipes. How to avoid pipeline fracture methods, including base and welding metal flattening tests, bending tests, drop tests, impact tests, and many other toughness indicators. Not only does it require high toughness for pipelines, but in recent years the industry has also put forward higher requirements for impact toughness. It is very difficult to avoid cracks in long-distance pipelines, and spiral steel pipes are actually difficult to achieve both domestically and internationally. This is because pipelines are hundreds of kilometers or even over 1000 kilometers long, with too many welding joints and nozzles, as well as damage caused during construction and transportation, which increases the construction and risk.