The Sichuan Hebang hydrogen sulfide (H2S) gas production project, located in in Leshan, Sichuan, China, has a capacity of 15,000 tons/year and covers 6,500 square meters with a cost of US$300 million (2 billion RMB).
One of the world’s top five engineering companies, JGC of Japan, licensed the production technology for H2S, one of the main materials of methionine, and partnered with Zhejiang Engineering Design Company (ZEDC) for the detail design work.
The project includes the following facilities:
- H2S plant
- Sulfur melting and purifying plant
- Sulfur warehouse
- Refrigeration plant
There are 95 pieces of equipment and 400 pipelines totaling 5,800 meters of stainless steel, carbon steel, galvanized steel, and PE pipe with diameters of DN15 to DN500 and a total of 21 pipe classes.
For this project, JGC needed to review ZEDC’s detail design 3D model at the 30 percent, 60 percent, and 90 percent stages.
“The project’s 3D model complexity and JGC's detail requirements were major challenges,” explained Miaoyan Jin, 3D administrator at ZEDC, “plus, many young engineers lacked experience using 3D design and had to learn it on the job.”
ZEDC had used other design software previously. Because of the importance of accurate material accounting and easy visual design reviews, it decided on 3D design using Intergraph® CADWorx® because of the software’s fast learning curve and ease of use plus its easy integration with CAESAR II® for pipe analysis.
Without CADWorx, more collisions in the design can occur, adding to expenses, and the bills of material would be less accurate. The design review meetings would typically uncover more errors resulting in costly rework, causing customer satisfaction to suffer.
By using CADWorx, ZEDC completed the database and 3D model independently and translated the 3D model of pipelines to CAESAR II to conduct the piping stress analysis.
CADWorx helped eliminate errors and customer complaints, and the detail design reviews were more intuitive and efficient, delivering higher customer satisfaction.
ZEDC increased its accuracy from 90 percent to 95 percent.
“Modeling totaled about 1,000 man-hours, a 20 percent reduction thanks to CADWorx and CAESAR II,” Jin added, “and man-hours will continue to decrease as staff members become more skilled.”
ZEDC received the 2016 CADWorx Drivers of Success Runner-Up Award for its use of the software. The annual Drivers of Success competition recognizes innovative applications of Intergraph products, impressive project results, and significant benefits from collaboration among disciplines and the integration of the products.