Performance characteristics of L450 pipeline steel pipe
L450 (also known as X65) is a pipeline steel plate, and it produces wide and thick steel plates with a thickness of 6 mm to 40 mm for straight welded pipes for oil and gas transportation and other fluid transportation. L450 is mainly used for gas, water and oil transportation in natural gas industry. The delivery status of steel plate is hot rolling or controlled binding.
L450 pipeline steel pipe is a kind of high-strength steel pipe specially designed for oil and gas transportation. It has high compressive strength, low-temperature toughness and excellent weldability, and is widely used in long-distance transportation pipeline systems such as oil and natural gas. This steel can meet the requirements of long distance, large diameter and high pressure transportation. L450 pipeline steel has become one of the preferred pipes in the fields of offshore oil platforms, onshore oil field gathering and transportation, and long-distance natural gas pipelines. For example, the chemical composition of X65/L450 pipeline steel pipe includes carbon (C)≤0.18%, manganese (Mn)≤1.70%, silicon (Si)≤0.45%, phosphorus (P)≤0.025%, sulfur (S)≤0.015% and carbon equivalent ≤43%. In terms of mechanical properties, the yield strength is 450-600MPa, the tensile strength is 535-760MPa, the elongation at break is ≥17%, the transverse bending test at 180 degree is D=2a, and the impact energy at -20℃ is ≥ 120 J.
The steel tube material L450 is equivalent to low-alloy high-strength steel. Specifically, L450 is the tubing material code in API standard, which is a standard English strength grade and may represent a certain specification 1. In addition, L450 is also the standard steel grade for seamless steel pipes and welded steel pipes, and its standard number is GB/T 9711.22.
Therefore, L450 steel pipe is a kind of steel with high strength grade, which is often used in the manufacture of long-distance pipelines such as oil and natural gas.
In terms of production, the production of L450 pipeline steel pipe involves many processes, including high frequency straight seam welded steel pipe and submerged arc welded straight seam steel pipe. These steel pipes can be delivered in different supply States, such as hot rolling, normalizing, normalizing rolling, TMCP and so on, which affect the final performance and application scenarios of steel pipes. For example, L450/X60 steel plate should be delivered in hot rolling, normalizing, normalizing rolling and TMCP state.
With the growth of global energy demand and the continuous expansion of energy supply chain, the market prospect of L450 pipeline steel pipe is broad. In the next few years, the global demand for oil and natural gas will continue to grow, and correspondingly, the pipeline construction market will continue to expand. As an important material for pipeline construction, L450 pipeline steel pipe will usher in a bigger market.
