J55 casing pipe specifications Standard: API Spec 5CT Product scope: 4-1/2"-13-3/8" Length: R1, R2, R3 Thread: LTC, BTC, STC Steel grade: J55 End protection: Couplings, thread protector made from rubber and steel Packing: black painting to avoid corrossion Production capacity: 100,000 tons per year Market: Mid East, Europe, Africa, Southeast Asia Contact person: Ms. Catherine Li Tel: +86-635-2946188 Fax: +86-635-2935599