Pipes with a nominal diameter greater than 50mm should not use unions.
Fire pipelines, as the name suggests, are pipeline systems established for firefighting. Due to special requirements, the thickness and material of firefighting pipelines have special requirements, and red paint is sprayed to transport firefighting water.
Fire-fighting pipeline refers to the pipeline material used for fire-fighting, connecting fire-fighting equipment and equipment, and conveying fire-fighting water, gas or other media.
Since the fire pipeline is often in a static state, the requirements for the pipeline are relatively strict. The pipeline needs to be resistant to pressure, corrosion and high temperature.
