![1974](../images/1974s.jpg)
- 05
- Founded Tong-Il Boiler Manufacturing Co.(private company)
![1974](../images/1981s.jpg)
- 05
- Established Tong-Il Boiler & Industries Co., Ltd
![1974](../images/1982s.jpg)
- 09
- Obtained production license from Korean government for marine equipment,
pressure vessels, industrial boiler
![1974](../images/1986s.jpg)
- 02
- Obtained production license from Korean government
for high pressure vessels & special tanks(e.g., gas tank)
![1974](../images/1987s.jpg)
- 04
- Shop approved by DNV, LR, GL, KR, ABS, BV
![1974](../images/1992s.jpg)
- 06
- Obtained ASME certificates(S, U, U2)
![1974](../images/1995s.jpg)
- 11
- Renewed ASME certificates
![1974](../images/1997s.jpg)
- 10
- Obtained ISO-9001 certificates for boiler and pressure vessel(DNV)
![1974](../images/2005s.jpg)
- 07
- Obtained DNV class I.
![1974](../images/2007s.jpg)
- 08
- Established an affiliated company, Y & S Co., Ltd.
![1974](../images/2014s.jpg)
- 01
- Extended a first factory