Product Overview — API 5CT 5-1/2" (139.70mm)Oil Casing Pipe
Our 5-1/2 inch (OD 139.70 mm) oil casing pipe is manufactured in strict compliance with API 5CT / ISO 11960 and API 5B standards. This is a highly 
versatile size widely used for surface casing, intermediate casing, and production casing in shallow to medium-depth wells (up to 4,000 meters).

Key Specifications:
• Outer Diameter: 5-1/2" (139.70 mm)
• Wall Thickness: 6.20/6.98 / 7.72 / 9.17 / 10.54 / 12.70 / 14.27 /15.88/17.45/19.05/20.62/22.22mm
• Weight Range: 14.00 – 43.10lb/ft 
• Length: R1 (4.88–7.62m) / R2 (7.62–10.36m) / R3 (10.36–14.63m)
Steel Grades: J55, K55, N80, N80Q, L80, L80-1, L80-13Cr, C90, T95, P110, Q125
Connection Types:
• Standard: STC, LTC, BTC 
• Premium:HRJ,RJPC,HQRC,HCDC
 Manufacturing & Quality:
• Hot-rolled seamless with quench & temper
• 100% PMI, hydrostatic test per pipe
• UT + eddy current per API 5CT
• MTC EN 10204 3.1 / 3.2
• API 5CT Monogram licensed
Surface Protection: Black varnish / 3LPE / Internal epoxy / Custom
Delivery: EX-WORKS/ FOB / CFR / CIF
Capacity: 10,000 ton/month
MOQ: 25 tons
Lead Time: 10–25 days