1. 16″ K55 BC API 5CT Casing Couplings.

2. Technical Standard: API 5CT 9th or API 5CT 10th, API 15B or API 16B, according to the customers’ need.

3. We will have every strict inspection on each product in the process of production, and each piece of casing coupling or tubing coupling keeps its related processing records.

4.  Invoice: Based on actual quantity shipped.

5. Quantity: According to the customers’ need.

Every processing procedure of each product is strictly controlled, and the processing and testing records of each product are recorded and archived in detail, to realize the traceability of the whole process.Continuous optimization of product quality management system is our consistent purpose. Through our unremitting efforts, we have passed APT on-site audit with excellent performance for many times and we have obtained the American API product certification with the number of 5CT-1368.In 2018, we were awarded as “China online marketing reputation enterprise” by the Ministry of Commerce and State-owned Assets Supervision and Administration Commission of the State Council.