Key Specifications/ Special Features:
Seamless line pipe operating environment of the pipeline, long lines, and not easy to maintain, the quality requirements are very serious.The main material of the tube is gr.b, X42, X46, X56, X65, X70, X80, X100 and other steel grades.
Many of the challenges facing seamless line pipe include:Most oil and gas fields are located in polar, ice sheet, desert and ocean areas, where natural conditions are relatively poor. Perhaps in order to move forward, the diameter of pipeline is expanding, the pressure of pipeline is increasing, and the corrosion of oil products in pipeline activities is also increasing.
From the development trend, pipeline laying conditions, primary failure methods and failure causes of oil and gas pipelines, it is concluded that pipeline steel should have excellent mechanical functions (thick wall, high strength, high resistance to wear and tear), large caliber, weldability, cold and low temperature resistance, corrosion resistance (CO2), seawater resistance, HIC and SSCC functions. And so on.
Mechanical properties:
StandardProduct LevelSteel gradeYield Strength (min), MpaTensile Strength(MPa)
API 5L GB/T9711.2 1A or L210210335
B or L245245415
x42 or L290290415
X46 or L320320435
X52 or L360360460
X56 or L390390490
X60 or L415415520
X70483565
PSL 2BR or L245R245~450415~760
X42R or L290R290~495415~760
BN or L245N245~450415~760
X42N or L290N290~495415~760
X46N or L320N320~525435~760
X52N or L360N360~530460~760
X56N or L390N390~545490~760
X60N or L415N415~565520~760
X65N or L450N425~566525~760
X70 or L480484~565565~768
X80552~690621~827