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API 5L X42 (L290) medium and low pressure pipeline steel: performance characteristics and engineering applications
Concept
API 5L X42 (ISO standard L290) is a medium and low strength pipeline steel in the API 5L standard, with a minimum yield strength of 290MPa (42ksi). As a transition grade between basic Gr.B and high-strength steel, it occupies an important position in the field of oil and gas transportation, and is particularly suitable for medium and low pressure long-distance pipeline systems.
Features
Moderate strength:
Yield strength 290-495MPa
Tensile strength ≥ 415MPa
Excellent process performance:
Carbon equivalent is controlled in the range of 0.35-0.40
Good welding performance, suitable for a variety of welding processes
Economical and reliable:
Better cost performance than high-strength steel
Meet most medium and low pressure transportation needs
Environmental adaptability:
Working temperature range -20℃ to 400℃
Can adapt to different environments through anti-corrosion treatment
Delivery status
Hot-rolled state (HR): conventional delivery form
Normalizing state (N): used in special occasions
Controlled rolling and controlled cooling (TMCP): advanced process for optimizing performance
Welded pipe state (ERW/SAW): common pipe form
Application
Medium-pressure oil and gas gathering and transportation trunk line (4-7MPa)
Provincial natural gas transmission and distribution pipeline network
Refinery process pipeline system
Industrial gas transmission pipeline
Heat network system