May 6, 2022 – Yeshan Guan Compressor Station Pipeline Nitrogen Purging Project

On April 25, after receiving the Class-I hot-work notification, our company faced the nationwide challenge of restricting hazardous chemical vehicles during the May Day holiday. Despite the significant costs involved, we proactively deployed liquid nitrogen equipment ahead of schedule and arrived on-site by April 29 to ensure project deadlines were met. At 7:30 a.m. on May 6, we initiated the purging operation, achieving compliance within just one hour—two hours earlier than originally planned. This allowed us to secure a critical time window for subsequent welding work, ultimately helping to keep the national key pipeline project on track.