ASTM A53 Grade B, SMLS and Welded Pipe steelmax2019-01-19T15:52:33+09:006월 6th, 2018| ASTM A53 은 배관용 탄소강과 또는 압력배관용 탄소강관에 나타나는 규격입니다. For use conveying gas, water and oil for low pressure service 또는 Carbon steel pipes for pressure service under 350℃