API Oil Casing & Tubing – Product Introduction‌

‌Material Standards‌
Manufactured in compliance with API SPEC 5CT (10th Edition, 2018), covering grades from H40 to Q125 with seamless (S) or electric-welded (E) production methods5. The steel composition includes Cr-Mo-V microalloying for enhanced mechanical properties.

‌Key Features‌

• ‌Corrosion Resistance‌: Special grades like L80-13Cr with 12.5-14.5% chromium content resist H₂S environments per NACE MR0175.
• ‌Thread Types‌: Includes short/long round threads (CSG/LCSG), buttress threads (BCSG), and premium connections like XCSG.
• ‌Dimensional Control‌: OD tolerance ≤±0.5% and wall thickness uniformity ≤10%.

‌Applications‌

• Conventional/extreme wells (150°C, 120MPa)
• Sour gas fields (H₂S >0.01%)

‌Certifications‌

• API Monogram Program (effective Jul 2019)
• ISO 11960 for dimensional compliance