Established in 1991, Young jin flex has been manufacturing pipes required for construction or plants such as Expansion joint, Flexible joint, Rubber connector, and materials for extinction of fires such as Flexible sprinkler hose, Sprinklers (Head), of which the company received ISO9001, KS, KFI, UL, FM, VdS, Gost certification.

Our company receives a good reputation for its professional technology and high quality products by providing solutions for the problems such as thermal expansion, contraction, vibration that frequently occurred in pipeline systems. Furthermore, our company preserves its strong status in the industry as a leading manufacturer for pipes and materials for extinction for fires by constructing the automatic production line equipped with new equipments.

Metallic expansion joint and Flexible joint can be produced up to 8000A while rubber expansion joint can be up to 3000A .
For Sprinkler flexible fitting (Sprinkler flexible hoses), we are able to manufacture from 500mm to 3700mm, which finished the testing by Korea Fire Equipment Inspection Corporation and from 700mm to 1800mm availalbe approved by UL, FM, VdS.

Currently, our company is providing Expansion joint and parts for vehicles to the Ministry of National Defense and to the government institutions. Our business partners such as Samsung Semiconductor, Hynix, Posco and Hyundai Engineering & Construction Co. Ltd. are practically using our company's products such as Flexible, Expansion, SP joint and our customers show strong satisfaction toward our products.