... : ASTM/ASME A213, A269, A270 2. Product Specification: OD6-530mm, WT 08-30mm, Length 3mm-14mm Welded square Pipe: The description of ... Din17456, Din17458 and so on. 2. Product Specification: OD6-530mm, WT 08-30mm, Length 3mm-14mm 3. Material Grade: TP304/304H/304L ...