لوله فولادی Astm A53 چین
ASTM A269 316 Stainless Steel Tubing, ASTM A213 ASME SA213 TP 316L Stainless Steel Tube, ASTM A312 ASME SA312 TP 316L Stainless Steel Pipe, 316L U bend Tubes, ASME SA 213 TP316 / 316L / ASTM A213 A312 TP316 TP316L EN 10216 – 5 1.4401 / 1.4404 Stainless Steel Tubes.