LYSF brand sanitary pipes, elbows, tees, and sizes are manufactured in strict accordance with foreign standards such as American 3A, BPE, German DIN, Swedish SMS, British BS, etc., using German imported production lines and advanced production techniques. The pipe fitting processing machine tools are all controlled by CNC to ensure the dimensional accuracy of each pipe fitting, and all pipe fittings are treated by bright solution treatment. So that LYSF brand pipe fittings fully meet the needs of the high-end market. 　　 In order to maintain the highest quality and ensure the consistency and interchangeability of product size, Yuning, cassette joints, flanges and other products of the same LYSF brand, so we all use CNC machine tools to process and pass strict inspections before handing them over to us. Customers.