Abstract: Methods of using induction heating and moisture barriers to seam weld tee fittings onto pipelines are disclosed herein. Benefits of the methods can include reducing the duration of the process, avoiding hazardous site conditions, and reducing the risk of hydrogen induced cracking in the circumferential fillet welds.

Abstract: The present disclosure provides a sealing plug assembly for stopping flow of a product in a pipe, the assembly having two sealing elements and having an isolation zone in the assembly which can be drained by a bleed lance to maintain pressure in the isolation zone within a safe limit. The present disclosure further provides sealing elements, bleed lances, systems, and methods of using the same. A benefit of the sealing plug assembly, and methods of using the same, can include forming safer seals during line stopping and the efficiency of recovering product.

Abstract: The present disclosure provides a sealing plug assembly, a line stop assembly, and a yoke for stopping flow of a product in a pipe as well as methods of using the same. The sealing plug assembly, the line stop assembly, and the yoke include one or more fluid pathways. A benefit of the sealing plug assembly, the line stop assembly, and the yoke can be to remove product from an isolation zone of a stopped pipe through the one or more fluid pathways.

Abstract: A system and method recover process gas from a source volume at a source pressure to a destination volume at an equal or greater pressure. A regulation process receive the process gas from the source volume and steps down the pressure. Each regulation uses one or more stage each using a pressure control valve for pressure step down and a heat exchanger for reheating the process gas thereafter. A gas scrubber receives the process gas from the regulation stages and collecting liquid from the process gas. A compression process receives the process gas from the gas scrubber and steps up the intermediate pressure to a final pressure. The compression can use one or more compression stages, each having a compression cycle for pressure step up and a heat exchanger for cooling the process gas thereafter. A discharge vessel receives the process gas from the compression process and discharges the process gas at the final pressure to the destination volume.