从China供应商批发进口5in Od 127mm L80 Casing Pipe Btc R3 — FOB条款

This seamless steel casing pipe carries a 5-inch (127 mm) outer diameter and is manufactured from API 5CT Grade L80 carbon steel, a controlled-yield grade specified for sour service environments where hydrogen sulphide exposure is a risk. The BTC (Buttress Thread Connection) R3 length designation indicates a premium threaded and coupled configuration with lengths typically ranging 36-40 ft, designed for reliable make-up in deep-well completions. The L80 grade delivers a minimum yield strength of 80,000 psi, positioned between J55 and P110 in the API 5CT hierarchy, making it suitable for production casing and liner applications where moderate strength with controlled hardness is required to resist sulphide stress cracking.

The pipe body is produced as seamless, not welded, ensuring uniform wall thickness and structural integrity under high internal pressure and external collapse loads. API 5CT L80 specifies a maximum hardness of 23 HRC for sour service, with chemical restrictions on sulphur and phosphorus to enhance toughness. The buttress thread form provides superior resistance to jump-out compared with round threads, particularly valuable in deviated or horizontal wells where bending stresses concentrate at connections. R3 length tolerance is typically +6 in / -0 in per API 5CT, though confirm exact lengths with the supplierggc supplier.

Buyers for this product include national oil companies, independent operators, and drilling contractors operating in mature basins with sour gas or high-CO2 reservoirs. Typical applications include production casing strings, liners in depleted zones, and intermediate casing where P110 strength is unnecessary. The BTC connection allows for efficient running without premium coupling costs. Before ordering, confirm the pipe's compliance with API 5CT latest edition, request mill test certificates with Charpy V-notch impact values, and verify thread inspection reports (typically API round-robin or equivalent).

Tianjin Grand Victory Petroleum Equipment Co., Ltd is based in Jinghai District, Tianjin, China, at No.17 Guanghai Road with postal code 301600. The company holds a Harbor trust tier on the platform, though its response rate shows 0.00% with zero recorded average response hours, indicating limited or no engagement with inbound enquiries through this channel. The supplier's profile does not indicate verified on-site inspection, third-party audit status, or years in operation, so buyers should conduct independent due diligence.

The listing presents itself as an oilfield tubular goods supplier with focus on API 5CT-certified casing and tubing products. The company address places it within Tianjin's established petroleum equipment manufacturing cluster, a region with extensive OCTG production infrastructure. No workforce size, annual revenue, client references, or specific manufacturing accreditations beyond the API 5CT product claim are stated. Buyers should request API licence number, ISO 9001 certification status, and recent mill inspection records directly from the company before committing to orders.