DN200 Double Line Stop Project Successfully Completed for Nanchang Gas
We are proud to announce the successful completion of a DN200 cylindrical double line stop project for Nanchang Gas in Nanchang.
The pipeline design pressure is 0.4 MPa, with an operating pressure of 0.35 MPa. The entire intervention was carried out using advanced Hot Tapping technology and a high-performance hot tapping machine, ensuring uninterrupted gas supply and zero shutdown throughout the operation.
Project Overview
Pipeline Size: DN200
Line Stop Type: Cylindrical Double Seal (Double Line Stop)
Design Pressure: 0.4 MPa
Operating Pressure: 0.35 MPa
Execution Method: Hot Tapping + Double Line Stop
The project required isolation of a live gas pipeline section while maintaining continuous operation. By deploying a precision-engineered hot tapping machine, we successfully performed hot tapping under pressure, followed by installation of a double line stop system for secure isolation.
Reliable Hot Tapping Under Gas Operating Conditions
Gas pipeline hot tapping requires strict control over sealing integrity, drilling stability, and operational safety. During this project:
The hot tapping machine delivered stable and controlled cutting under 0.35 MPa working pressure.
The hot tapping cutter maintained precise alignment to ensure smooth coupon removal.
The sealing assembly of the hot tapping machine provided reliable dynamic sealing during the entire drilling process.
No gas leakage or pressure fluctuation occurred during hot tapping.
The successful execution once again demonstrates the reliability of our hot tapping machine in municipal gas applications.
Double Line Stop for Enhanced Safety
After completing the hot tapping operation, a DN200 cylindrical double line stop system was installed. The dual-seal configuration provides enhanced redundancy and secure isolation performance, which is especially critical in gas pipeline environments.
Key technical highlights include:
Dual sealing structure for maximum safety
Stable mechanical locking mechanism
Excellent sealing performance under designed pressure
Suitable for repeated hot tapping and maintenance operations
The seamless integration between the hot tapping machine and the double line stop system ensured smooth transition from drilling to isolation.
Demonstrated Capability in Municipal Gas Projects
This DN200 hot tapping and double line stop project further validates our technical expertise in live gas pipeline intervention. The stable performance of our hot tapping machine under real operating pressure conditions reinforces our commitment to delivering safe, efficient, and zero-downtime solutions.
We will continue to provide advanced hot tapping technology and reliable hot tapping machines to support gas utilities and pipeline operators in achieving safe and uninterrupted operations.
