voestalpine Böhler Welding

Fabrication welding of coke drums

Success Story | India

Critical refinery process equipment

Spring 2017, ISGEC Hitachi Zosen Ltd. in India achieved a milestone with the delivery of two coke drums from their Dahej construction site to the Indian Oil Corporation Ltd. refinery in Haldia in the state of West Bengal. The coke drums are a crucial component of the so called delayed coker unit which is part of IOCL’s Aishwarya distillate yield improvement project – a US$ 0.5bl investment. ISGEC Hitachi Zosen Ltd. specializes in the fabrication of critical process equipment for refineries, fertilizer & petrochemical industries, delivering across the world. Amec Foster Wheeler acted as EPC.

The coke drums - with a diameter of 9 m, a length of 38 m and a weight of 550 MT each - are constructed from roll-bonded plate consisting of ASTM SA387 Grade 11 (normalized & tempered) steel with a wall thickness of 50mm and an internal lining of 4mm thick AISI 410S martensitic stainless steel. The roll-bonded plate was supplied by our mother company voestalpine.

Observing the imposed technical requirements and based on previous experience with similar projects, the following filler materials were recommended by voestalpine Böhler Welding in India:

SAW wire/flux: Union S2 CrMo / UV 420 TTR
GTAW: Union I CrMo


Read the full Success Story with Hitachi Zoisen here on the right side!