Uninstalling Yarn depends on how you initially installed it. If you installed Yarn via npm (Node Package Manager), you can uninstall it by running `npm uninstall -g yarn` in your terminal. This removes Yarn globally from your system. For those who installed Yarn through a package manager like apt for Ubuntu, or brew for macOS, you would use the corresponding remove command, e.g., `sudo apt-get remove yarn` or `brew uninstall yarn`. Remember, if Yarn was installed by another means, such as a direct download from the Yarn website, you'll need to refer to specific instructions or simply delete the Yarn files and folder manually. Always ensure to also remove any environment variables related to Yarn in your shell configuration files to prevent any conflicts or issues with other package managers.

Among the top polypropylene producers globally, leading companies include Sinopec Group, LyondellBasell, SABIC, PetroChina, and Braskem. Sinopec Group, a Chinese petroleum and chemical giant, holds one of the top spots due to its vast production capacity and extensive product range. Netherlands-based LyondellBasell is noted for its innovative polypropylene technologies and global reach. SABIC, headquartered in Saudi Arabia, stands out for integrating production processes from petrochemicals to polymers. PetroChina is another key player, leveraging China’s vast market and resources. Brazil’s Braskem leads in South America, emphasizing sustainable practices. These companies have distinguished themselves through technological innovations, market presence, and commitment to sustainability, addressing both commercial demands and environmental challenges.

To join galvanized pipe to PVC, an adapter is needed. This adapter typically involves threading one end to match the galvanized pipe and a slip end for PVC connection. First, ensure the galvanized pipe thread is clean. Apply thread sealant or plumber's tape to this thread for waterproof sealing. Screw the threaded side of the adapter onto the galvanized pipe tightly. Next, prepare the PVC pipe by cleaning its end. Apply PVC primer (if required by local codes) and glue on both the outside of the PVC pipe and the inside of the adapter's slip end. Quickly push and twist the PVC pipe into the adapter and hold it for a few seconds to ensure a solid seal. It's important to allow the joint to cure as per the PVC glue manufacturer's instructions before subjecting it to any pressure. This process integrates the strength of metal with the flexibility of PVC, offering a robust solution for mixed-material plumbing systems.