Pressure Vessels - Difference Between KEA, KGS, and KOSHA in Korea. In Korea, pressure vessels, boilers, and industrial process equipment are regulated by different authorities depending on the equipment type, fluid characteristics, operating conditions, and applicable legislation. The three major organizations are as follows: Korea Energy Agency (KEA) Korea Gas Safety Corporation (KGS) Korea Occupational Safety and Health Agency (KOSHA) 1. Korea Energy Agency (KEA) KEA mainl