When are bolted couplings typically used in pipeline repairs?

Bolted couplings are typically used in pipeline repairs on pipe sizes of 2 inches or larger due to their structural design and strength. These couplings provide a secure and robust connection that can effectively withstand the stresses and pressures typically encountered in larger pipelines. Such applications often involve higher pressures or fluid flow rates, which necessitate a coupling that can ensure a tight seal without risk of failure.

For pipes smaller than 2 inches, other methods, such as compression fittings or soldering techniques, are often more practical and economical. Bolted couplings involve a more complex installation process, which may not be justified for smaller diameter pipes. Additionally, smaller pipes may experience less stress and therefore do not require the added strength that bolted couplings offer.

The context of pipe pressure is also relevant; while bolted couplings can work in low-pressure scenarios, they are designed to handle the demands of standard and high-pressure applications, which is why they are recommended for larger pipes. Thus, their use is specifically targeted toward pipes that are 2 inches or larger, making them suitable for various repair situations in infrastructure where capacity and durability are critical.