... seamless pipe: Standards:ASTM, DIN, EN, JIS, GB,etc. Grades: TP304/304L/316/316L/316Ti/347/347H/310S/321,etc ASTM ... .4307/1.4571/1.4541/1.4550 etc3Standard: ASTM A312/213/269, EN10216-5, DIN17456/17458, JIS34594Application widely used in petroleum ... : ISO9001-2000; PED97/23/EC hydraulic stainless steel seamless pipe (TP304/304L/316/316L)