This natural gas pipe sizing calculator is based on the 2009 Uniform Plumbing Code and the 2009 Uniform Mechanical Code

Based on the 2009 Uniform Plumbing Code and the 2009 Uniform Mechanical Code, published by IAPMO. For sizing pipe systems carrying natural gas of 0.60 specific gravity at approximately eight (8) inches water column pressure. All capacities shown are maximum and in cubic feet per hour.