Simbi pombi zvinhu isiri-alloy yakaderera kabhoni simbi.Kugadzira pombi tekinoroji nzira ndeye ERW yakasungirirwa nelongitudinal seam.Zviyero zvechigadzirwa zvinokwanisa kutevedzera ASTM A500, ASTM A53, ASTM A795, BS1387, BS EN10255, EN 10219, BS 1139, BS 39.