The operation was carried out on a DN426 pipeline made of L360 material, employing a technique involving eight hot-tapping and plugging actions—four suspended plugging and four cylinder plugging operations. The pipeline had a design pressure of 6.4 MPa, while the operating pressure of the medium inside was 3.5MPa.
After thorough preliminary preparations, the operation was performed using key equipment including the HT500 tapping machines, HT150 tapping machines, and TPP500 hydraulic power unit. The team systematically completed a series of procedures such as pressure welding, hot tapping, plugging, and installation of blanking plates, successfully accomplishing the task.

Four hot taps were made on the DN800 pipeline, and two hot taps were made on the DN700 pipeline. The pipe wall thickness is 13mm, with a design pressure of 1.0 MPa and an operating pressure of 0.8 MPa.After thorough preliminary preparations, the operation was performed using key equipment with the HT700 tapping machines.

Pipelines of the flare gas knockout drum V22310.
The medium in the pipeline is low-pressure fuel gas, with an outer diameter of 630 mm and a wall thickness of 12 mm. The pipeline has a design pressure of 1.0 MPa and an operating pressure of 0.1 MPa.The main work involves performing two plugging operations on DN600 pipelines and two hot tapping operations on DN500 pipelines .The primary equipment used is the HT700 hot tapping machine.

A 45-degree angled hot tap was performed on the 1520mm OD main pipeline to create a DN600 branch connection. The pipeline has a design pressure of 0.25 MPa and an operating pressure of 0.07 MPa, with a wall thickness of 12 mm.The pipeline material is 16Mn (equivalent to ASTM A572 Gr.50), and the medium conveyed is flare gas. The design temperature is 40°C, while the operating temperature is 25°C.The operation primarily utilized the HT700 hot tapping machine.

Performing a double plugging operation with pigging on the DN400 crude oil pipeline. The pipeline has a design pressure of 6.4 MPa and an operating pressure of 1.6 MPa, with a wall thickness of 7 mm. The main equipment used was the HT500-2G hot tapping machine.

The construction technique involved performing a single plugging operation with pigging on the DN377 pipeline. The pipeline conveys crude oil, with a design pressure of 6.4 MPa and an operating pressure of 1.6 MPa. The main equipment used was the HT500-2G hot tapping machine.

The construction technique involved performing a double plugging operation with pigging on the DN200 crude oil pipeline. The pipeline has a design pressure of 6.4 MPa and an operating pressure of 1.6 MPa. The main equipment used for the operation was the HT150G hot tapping machine.

The construction technique involved performing a double plugging operation with pigging on the DN559 crude oil pipeline. The pipeline has a design pressure of 6.4 MPa and an operating pressure of 1.6 MPa. The main equipment used was the HT500-2G hot tapping machine.