We offer a variety of sizes for tubing couplings, including 2-3/8", 2-7/8", 3-1/2", 4", and 4-1/2" in grades J55, K55, N80, and P110. All our couplings meet the API Specifications 5CT/5B requirements.

Couplings are short lengths of pipe used to connect two joints of tubing or casing. We provide two types of casing couplings: EUE (External Upset End) and NUE (Non-Upset End). Our threading process utilizes advanced numerically controlled lathes and imported molding cutters to ensure accurate thread formation in a single operation, ensuring compatibility and interchangeability between couplings.

To ensure the highest quality control standards, we have established comprehensive testing capabilities. We conduct thorough assessments using specialized tools to measure tape accuracy, check pitch alignment, analyze tooth depth uniformity, and verify profile integrity.

We stock a range of sizes from 2-3/8" to 20'' in various grades such as J55,K55,N80,and P110. All our products comply with the rigorous API Specifications 5CT standards to guarantee superior performance and reliability within the industry.

Additionally, please note the following details:

1. Size: Available sizes include - 2-3/8",2-7/8",3-1/2",4",and4-1 /2"

Standard: Compliant with API Specifications -API 5CT /5B

Type: EUE & NUE

Grade: J55/K55/N80/L80/P110

Packaging: Couplings are securely packaged on wooden pallets tightly wrapped/W paper carton.

During production, we carefully select raw materials while conducting mechanical tests such as tensile strength evaluations and impact tests. We also monitor chemical properties control for optimal results. Sulfide stress cracking tests are performed for material grades C90 or T95. Size tolerances, including outer diameter (OD), wall thickness, length, and straightness, are rigorously controlled. Thread quality is closely monitored in terms of threads per inch and thread angle (premium threaded options undergo even more stringent checks).

Heat treatment is applied to enhance the mechanical properties of the couplings. Additional markings as required by specifications are added, and material certification verification is conducted. Product Specification Level (PSL-2 or PSL-3) compliance is ensured.

The above information provides a detailed overview of our tubing coupling products. Please feel free to refer to it for your reference.