φ330×43×6米以上的D6AC、D6AE钢管由八角形电渣钢锭直接在318周期轧管机组上进行轧制。为了探索钢管轧制后裂纹的敏感性,钢锭分两批装炉,第一批装2支,轧φ335×17,第二批装9支,轧φ330×43。通常,φ500八角形电渣钢锭每支重 φ330 × 43 × 6 meters above the D6AC, D6AE pipe by octagonal ESL ingot directly in the 318 cycle rolling unit rolling. In order to explore the susceptibility of steel pipe after the crack, ingot loading furnace in two batches, the first batch of 2, rolling φ335 × 17, the second batch of 9, rolling φ330 × 43. Normally, φ500 octagonal electro-slag ingots are each heavy