A53 seamless, steel pipe jẹ paipu irin boṣewa Amẹrika ti o pin si awọn oriṣi meji: A53A ati A53B.Lara wọn, A53-A jẹ deede si China 10 # irin, A53-B jẹ deede si China 20 # irin, ati A53-F jẹ deede si awọn ohun elo q235 China.ASTM A53 paipu irin jẹ o dara fun gbigbe awọn olomi ati gaasi ni epo, gaasi adayeba, ati awọn ile-iṣẹ kemikali.