API 5L Gr.B (L245) concepts
API 5L Gr.B (corresponding to ISO L245) is the most basic pipeline steel grade in the API 5L standard, with a minimum yield strength of 245MPa (35ksi). As an entry-level pipeline material, it is widely used in low pressure fluid delivery systems and is one of the most widely used steel grades in the oil and gas industry.
API 5L Gr.B (L245) features
Economical and practical: Selection of basic pipe with the best cost-benefit ratio
Excellent processing performance: excellent cold bending and machining performance. Good welding performance, suitable for field construction
Base strength: yield strength 245-450MPa, tensile strength ≥415MPa
Environmental adaptability: The operating temperature range is -29℃ to 427℃, and the service life can be extended by anti-corrosion treatment
Delivery condition: Hot rolled condition (HR) : The most commonly used form of delivery
Normalizing state (N) : Used to improve tissue uniformity
Welded pipe status (ERW/HFW) : straight seam or spiral welded pipe form
API 5L Gr.B (L245) application
Low pressure oil and gas gathering network
City gas distribution system (working pressure ≤4MPa)
Water mains for water works
Structural support pieces and pipe gallery brackets
Chemical medium low pressure transmission pipeline
