ASTM A179——– Standard ti Awujọ Amẹrika fun Idanwo & Awọn ohun elo
Ti a lo fun oluyipada ooru tubed, condenser ati iru awọn ohun elo gbigbe ooru; Ipele akọkọ: A179
ASTM A192——- Standard of American Society for Testing & Materials is used for high pressure min.Odi sisanra laisi erogba irin igbomikana ati tube Superheater;Ite akọkọ:A192