High standard of products from a good source - from the source, the control of raw materials into the factory inspection

 Our company produces all products, in every production process will strictly control the quality of products, from the source, we select raw materials must have production qualification, must issue the original product quality certificate, to ensure that the raw materials selected meet the requirements of gas cylinder production.

1. The appearance inspection of seamless steel pipe shall ensure that the product is free from any deformation, scratch, pitting and other defects affecting the product performance;  
2. The outer diameter of seamless steel pipe shall be ±1% of the nominal outer diameter (hot rolled) and ±0.75% of the nominal outer diameter (cold rolled) specified in GB/T18248-2021;  
3. The wall thickness of seamless steel pipe is hot rolled (-10%~+12.5%) and cold rolled ±10% according to the nominal wall thickness stipulated by GB/T18248;  
4. The analysis of metal chemical composition in seamless steel pipe shall be conducted according to the detailed provisions of GB/T18248-2021 and TSG23-2021 on chemical composition.  
5. Cylinder quality traceability from the source, each cylinder at the bottom of the imprint transplant number, to ensure the traceability of cylinder products.