DN200 Double Line Stop Project Successfully Completed in Guangzhou
We are pleased to announce the successful completion of a DN200 cylindrical double line stop project in Guangzhou.
The pipeline design pressure is 1.6 MPa, with an actual operating pressure of 0.35 MPa. The entire operation was executed using advanced Hot Tapping and line stopping techniques, ensuring safe intervention without shutdown or service interruption.
Project Overview
Pipe Size: DN200
Line Stop Type: Cylindrical Double Seal (Double Line Stop)
Design Pressure: 1.6 MPa
Operating Pressure: 0.35 MPa
Method Applied: Hot Tapping + Double Line Stop Installation
The objective of this project was to isolate a section of the pipeline for modification while maintaining continuous operation. By utilizing Hot Tapping technology, we successfully performed live pipeline intervention under pressure, followed by the installation of a double line stop system to achieve secure isolation.
Application of Hot Tapping Technology
Hot Tapping played a critical role in this project by enabling:
Zero downtime execution — No shutdown required
Continuous pipeline operation during construction
Controlled and safe pressurized drilling
Precise alignment and cutting accuracy for DN200 pipeline
The Hot Tapping machine ensured stable cutting under the 0.35 MPa working pressure, while maintaining full system integrity throughout the drilling process.
Double Line Stop for Maximum Safety
Following the Hot Tapping operation, a cylindrical double line stop system was installed. The double sealing structure provides enhanced safety redundancy and reliable isolation performance.
Key advantages include:
Dual sealing mechanism for increased operational safety
Stable performance under designed pressure conditions
Effective sealing integrity during pipeline intervention
Suitable for repeated industrial maintenance operations
The combination of Hot Tapping and double line stop technology ensured that no leakage occurred and that pipeline service remained uninterrupted during the entire procedure.
Project Significance
This successful DN200 Hot Tapping and double line stop execution once again demonstrates our technical capability in live pipeline intervention under pressure. The project validates the reliability, sealing performance, and operational stability of our equipment under real working conditions.
We remain committed to delivering professional Hot Tapping and line stopping solutions that ensure safety, efficiency, and zero downtime for pipeline operators worldwide
