We use a strict quality monitoring system to test the raw materials in the production process and test each product to ensure that each pipe meets the standard requirements and fully meets the requirements in the factory.


Our quality control system mainly includes the following steps:


1. in order to ensure that the raw and auxiliary materials used are all qualified products, the company evaluates and chooses the qualified suppliers according to the GB / T19001-2000-ISO9001:2000 and API standards. The quality control department inspecting the raw material inspectors, and the unqualified raw materials and accessories should not be put into use.


2. casing diameter test: this test is used to detect the straightness of the tube and detect whether the tube wall is concave or convex.


3, the quality inspection is aimed at the finished product inspection, the quality inspector needs to check to ensure that the product has no obvious defects, and all the pipes are in accordance with the required parameters and length.


4. pipe size and appearance inspection: the quality control personnel check the size and surface of the steel pipe to ensure that they meet the requirements.


5. hydrostatic pressure test: the tube is pressed into hydrostatic testing machine, and water is injected into the pipe body to ensure that the pipe can bear the internal water pressure and ensure that the pipe body does not leak water.


6. physical and chemical analysis of casing ring: this test is used to analyze the chemical composition, mechanical properties and metal structure of raw materials in pipes.


7. casing thread test: the production personnel will conduct physical examination after the yarn stage in the production process to ensure compliance.

USI employs a meticulous quality assurance framework to meticulously scrutinize raw materials and conduct thorough product testing throughout the manufacturing process. This approach ensures that every tube adheres to stringent quality benchmarks and is deemed fully compliant before leaving the factory. The quality control protocol encompasses several key stages:

 

Supplier Evaluation and Selection:

Adhering to GB/T19001-2000-ISO9001:2000 and API standards, the company meticulously evaluates and selects suppliers to ensure the raw and auxiliary materials used are of the highest quality. The Quality Management Department's raw material inspector conducts inspections to prevent the use of substandard materials and components.

 

Casing Pipe Diameter Inspection:

This procedure is designed to assess the pipe's straightness and identify any bulges or irregularities in the pipe wall.

 

Final Product Quality Check:

Quality control personnel meticulously examine the finished products to ensure they are free of visible defects and conform to the specified parameters and length requirements.

 

Tubing Collar Dimension and Appearance Audit:

Quality control staff meticulously inspect the dimensions and surface condition of the steel pipes to guarantee they meet the established standards.

 

Hydrostatic Testing:

The pipes are subjected to hydrostatic testing, where they are filled with water under pressure to verify their structural integrity and leak-proof nature.

 

Physical and Chemical Analysis of Casing Collars:

This examination involves analyzing the chemical composition, mechanical properties, and metal structure of the materials used in the pipes to ensure they meet the necessary quality criteria.

 

Casing Pipe Thread Verification:

Production staff conduct a physical inspection of the threads post-manufacturing to ensure they meet the required specifications.

 

By adhering to these comprehensive quality control measures, USI ensures the reliability and excellence of its products, maintaining a high standard of customer satisfaction and industry compliance.