Piping Engineering Tools and Information in a Single App. 1. Piping Engineering Calculators : a: Pipe Spacing Calculator. b: Allowable Design Pressure Calculator as per ASME B31.3 c: Pipe Wall Thickness Calculator as per ASME B31.3 d: Bend Wall Thickness Calculator as per ASME B31.3 e: Branch Reinforcement Calculator as per ASME B31.3 f: Pipe Support Spacing Calculator g: Bolt Length Calculator 2. Piping Fittings Dimensions: a: Steel Pipes b: Soc