Piping Guide

Transair™ Pipe System for Inert Gases

Argon, Nitrogen and Argon/CO2 Mixtures

Transair is a fast, flexible and easy to modify aluminum pipe system for inert gas and compressed air applications. Transair components are reusable and interchangeable, which enables immediate and easy layout modifications.

Push-to-fit quick connections and the elimination of soldering, threading and gluing helps reduce installation and maintenance time and costs when compared to traditional pipe.

Unlike the performance of steel or copper, which degrades over time due to corrosion, Transair provides clean air quality with optimum flow rate performance.

Transair aluminum pipe ensures a total absence of corrosion, prevents problems caused by rust, which affects galvanized steel systems, and helps ensure the longevity of equipment. The “full bore” design of Transair components, the low friction coefficient of aluminum pipe and the sealing characteristics of the system ensure optimal and constant flow throughout.

Praxair Piping Guide

Suitable Gases

  • Argon and Nitrogen


  • Pipe: Powder-coated aluminum
  • Hoses: Black SBR with synthetic braiding reinforcement
  • Connectors: Polyamide with fiberglass and plated brass
  • Made from 100% recyclable materials

Fire Resistance

  • All components are nonflammable, with no flame propagation
  • Working pressure: 29.6” Hg vacuum to 232 psi
  • Working temperature: -4° F to+ 140°F


  • Aluminum pipe: conforms to ASTMB241, EN 755.2 and EN 755.3 Meets the requirements of ASMEB31.1 and ASME B31.3
  • Connectors: conform to UL94HB
  • Mounting clips: conform to UL94V02

Additional Piping Options — Aluminum/HOPE and Copper Piping Systems

Duratec® Aluminum/HOPE

Modern process equipment, controls and instrumentation require a supply of clean, uncontaminated air, prompting new piping systems like Duratec.

Constructed of an inner and outer layer of HOPE sandwiched over an aluminum core, Duratec Air Line is a lightweight, clean, noncorroding compressed air and inert gas distribution system.

Duratec’s polyethylene inner liner provides a lifetime of smooth flow.
Unlike metal piping, Duratec will not scale, pit or corrode, delivering constant flow with no increase in pressure drop over time.

When engineered with a mix of polyethylene, the aluminum core provides strength, rigidity, flexibility and toughness. The outer polyethylene layer provides permanent blue color coding and chemical, corrosion, UV and moisture protection to ensure long system life.

Copper Piping

Copper grades K or L accept grade L fittings. The copper is annealed by the brazing process. Pipe must be washed, capped and cleaned for oxygen service to maintain low-hydrocarbon content of oxygen, nitrogen, argon, hydrogen, CO2, helium or mixtures of these gases.

Copper is brazed using a phos­copper silver alloy with a nitrogen internal purge to prevent copper oxide from forming inside the copper tube. Hydrocarbon out-gassing is essentially zero, and inboard diffusion of water is determined by the design of the valves used in the system.