Casing is a large diameter pipe that serves as the structural retainer for the walls of oil and gas wells,Website:http://www.ausinpipeline.com, or well bore in oil drilling field. It is inserted into a well bore and cemented in place to protect both subsurface formations and the wellbore from collapsing and to allow drilling fluid to circulate and extraction to take place. Steel Casing Pipes have smooth wall & minimum yield strength of 35,000 psi.1. Casing pipe Product specification: O.D.: Casing: 4 1/2″-30″ (114.3mm-762mm)Tubing: 1.05″-41/2″(26.7mm-114.3m)Length:R1:4.88-7.62M R2:7.621-10.36M R3:10.36-14.63MW.T.: 0.205" – 0.875" (5.21mm- 22.22mm)2. Product standards: API 5CT, BS EN ISO11960, NFM87-207, JIS G3439, ISO 4270, GOST 632-80Material:H40, J55, K55, N80-1, N80Q, R95, L80-1, L80-9Cr, L80-13Cr, C90, T95, C110, P110, Q125, V150Annual output:150000 tons3. Thread type:Casing: STC, LTC, BTC, OTTM, OTTG, BTO, NEW VAM, VAM TOP, VAM FJL, VAM ACE, FOX, Hydril, Hunting etc.Tubing: NU, EU, XL, PH-4, PH-6, LTC, STC, BTC, NEW VAM, VAM TOP, VAM FJL, VAM ACE etc. 4. AssuranceAPI/ISO quality system, SGS, DNV, BV, Moody third party inspection welcomed