JINGGONG.JINGGONG was established on April 19, 2006, with its registered location in the Jinnan Economic Development Zone, Tianjin. JINGGONG holds independent import and export rights for its products, which are exported to countries including the United States, Canada, Indonesia, Egypt, and South Korea. Monthly production capacity ranges from 40 to 50 containers. The company has invested heavily in constructing its own laboratory to conduct testing on raw materials and auxiliary materials that exceeds API standards. JINGGONG's product range encompasses tubing couplings from 2-3/8“ to 4-1/2” and casing couplings from 4-1/2“ to 20”, primarily in steel grades including J55, K55, N80, L80, and P110. Its production capacity for 20' casing couplings reaches 3,500 pieces monthly, achieving advanced domestic standards. Primary products include: tubing couplings, casing couplings, short sections, line pipe couplings, thread adapters, one-way valves, blowdown valves, and centralizers.