Flame-free Refrigerant Connector, Flame-free Pipe Joint, Non-welding Refrigerant Fitting. "We Will Redefine Refrigerant Piping Standards with Weldless, One-Touch Solutions"... Evertech Corporation CEO Woo Ji-hyun

The world's first and best highly flexible stainless steel piping for refrigerants (PossFD) and the one-touch "HookJoint" connection system.

Technical Seminar on STS Refrigerant Piping and Weldless Hook Joint Technology with POSCO

Ministry of Land, Infrastructure and Transport of the Republic of Korea Notification No. 2025-599 Revision of the Standard Specifications (KCS 31 20 15) for Piping Installation Works

We’re looking for reliable partners in each country to help bring our hook joints to a wider global market.

Participating in the 2025 Korea Machinery & Equipment Exhibition (HVAC)

2024 POSCO Sustainable Materials Forum

Environmental Product Declaration Certificate

STS refrigerant piping signed an OSC market development business agreement using national new technology

Participated in the 2024 Korea Refrigeration and Air Conditioning Exhibition (HVAC)

Participated in ISH International Air Conditioning, Heating and Cooling Exhibition in Germany in March 2023

POSCO,& two partner companies , develop new technology. Acquired certificates.