Speed-Up for Welding of High Pressure Natural Gas Transmission Pipelines on-site.

A Review of Manufacturing Process of Polyethylene Pipe and Connectors for Applying in High-Pressure Natural Gas Pipelines

In this article various pipes used for transporting of gas are introduced and pros and cons of each one are elucidated. The pipes are categorized in three different subgroups including metallic, polymeric and metallic-wire reinforced polymeric pipes. Metallic-wire reinforced polymeric pipes are nominated as the best option for usage in high pressure pipelines transporting natural gas. As a resu...

risk assessment of exposure to gases released by welding processes in iranian natural gas transmission pipelines industry

exposure to welding gases can cause health adverse effects. risk assessment is a useful tool for good assessment of exposed workers. the purpose of this study was to determine the risk levels for exposed welders to welding gases. welders (n=239) were selected from iranian natural gas transmission pipelines industry from four regions in iran including assaluyeh, omidieh, loshan, and borujen. ozo...

Natural Gas Pipelines

Numerical simulation of transient natural gas flow in pipelines using high order DG-ADER scheme

To increase the numerical accuracy in solving engineering problems, either conventional methods on a fine grid or methods with a high order of accuracy on a coarse grid can be used. In the present research, the second approach is utilized and the arbitrary high order Discontinues Galerkin Arbitrary DERivative (DG-ADER) method is applied to analyze the transient isothermal flow of natural gas th...

Metallurgical Analysis of High Pressure Gas Pipelines Rupture

On 6 July 2004, two parallel-running gas pipelines (18-inch and 24-inch diameters), in the main transmission network of SNGPL (a gas company in Pakistan) were ruptured. The ruptures occurred in the early hours of the morning about 8 miles downstream of the compressor station AC-4. The ruptures were indicated by the increased gas flow at the outlet of AC-4 [1], first at about 0648 hours and then...