Import Bi Metal Liner — Buy in Bulk from Supplier in China

The Bi Metal Liner from Jinan Tianwei Innovation Oilfield Equipment Enterprise is a centrifugally cast premium chromium liner designed for mud pump cylinders in oilfield drilling operations. It combines a forged steel outer shell with a high-chrome iron inner sleeve, with the bore machined and heat treated to a minimum uniform hardness of 62 HRC. The inner diameter is honed to a mirror-like finish to promote smooth, even wear during service. This liner is manufactured to API 7K quality standards and is available for all major pump brands including Emsco, Ideco, National, Gardner Denver and Oilwell series.

The bi-metal construction addresses the conflicting demands of structural strength and abrasion resistance. The forged steel outer shell provides the hoop strength required to contain high pumping pressures, while the high-chromium iron sleeve (typically 25 to 28 percent chromium) offers superior resistance to the silica and garnet abrasives common in drilling mud. Centrifugal casting ensures metallurgical bonding between the two layers without mechanical joints that could fail under fatigue. The mirror-finish honed bore reduces initial break-in wear and helps maintain consistent piston seal contact, extending both liner and piston packing life.

This liner type suits standard drilling environments where service life exceeds 1000 hours under normal conditions. It is positioned between conventional hardened liners (shorter life, lower cost) and full ceramic liners (longer life, higher cost, more brittle). Buyers running Emsco F-1600, National 12P160, Gardner Denver PZ11 or comparable pumps should specify the exact pump model, cylinder bore and pin or key configuration when requesting compatibility confirmation. The supplier also lists chromium-plated and hardened liner alternatives for buyers with different wear profiles or budget constraints.

Jinan Tianwei Innovation Oilfield Equipment Enterprise is located at No.13 Shunshi Road, Jinan, Shandong Province, 250002, China. The supplier holds an imported supplier tier and a harbour trust tier on the platform, with a response rate of 0.00 percent and zero recorded average response hours. This lack of response data means buyers cannot rely on platform messaging alone and should establish direct email or telephone contact for technical discussions and order follow-up.

The company specialises in mud pump liners and spare parts for oilfield drilling equipment. It offers four liner types: premium chromium (bi-metal), ceramic, chromium-plated and hardened. The listing provides extensive pump model compatibility data but does not state year of establishment, factory floor area, number of employees, annual production volume, ISO certification status, or API licence number. No client references, field performance data or third-party inspection certificates are mentioned. Buyers should request an API 7K compliance certificate, material test reports for the forged steel shell and cast iron sleeve, and a factory audit report before placing a trial order.