ASME B31

ASME B31 and Other ASME Boiler Codes     

The first meeting of the newly formed American Society of Mechanical Engineers (ASME) was held on February 16th, 1880. Its purpose was to provide a platform for the larger machine builders and designers to discuss concerns brought on by the industrialization of the USA. The predominant source of power in those days was steam that required the use of boilers. Boiler explosions were quite common and no legal boiler codes existed.

In 1905, a reserve boiler at The Grover Shoe Factory in Brockton, Massachusetts exploded. It propelled through the roof of the building and burning coals cascaded on the wreckage causing fires that were fueled by broken gas lines. 58 people were killed and over 100 more were injured. The ASME response was to create boiler codes that were first published in 1915. There are now over 600 ASME codes in effect today.

Many of these ASME codes are a way of life for the owners and employees of Aero-Flex Corporation, Aero-Flex was started in 2008 by Josh and Michael Deakter producing flexible metal hoses, piping systems, and bent pipe/tubing assemblies. With the company motto “Quality Without Question” Aero-Flex is now the world’s leading supplier of these and other products that are ASME compliant.

ASME B31 Categories

ASME B31 is the code for pressure piping and there are several different categories:

  • 1 – 2012 – Power Piping – The applies to industrial plants and marine applications with pipes and boilers that exceed 160 PSIG and 250°F
  • 2 – 1968 – Fuel Gas Piping
  • 3 – 2012 – Process Piping – This applies to the design of chemical and petroleum plants, chemical plants and many other industries including piping for cryogenic fluids and piping within a packaged assembly.
  • 4 – 2012 – Pipeline transportation systems for liquid hydrocarbons and other liquids. Think of this code when you are following a tanker filled with a chemical while driving on the freeway.
  • 5 – 2013 – Refrigeration piping and heat transfer components. Refrigerant chemicals under compression and very low temperatures require a piping system that can handle those conditions.
  • Several other categories under the B31 code include piping systems for gas transmission, gas pipeline maintenance, building services piping, slurry transportation piping systems, hydrogen piping and pipelines and finally a manual to determine the “remaining strength of corroded pipelines”.

More than Pipefitters

With over 75 years of designing and building piping systems, Aero-Flex has the expertise to create ASME compliant piping systems and components from ¼” to 14” diameter pipes to deliver all types of chemicals to their destination. Every weld is inspected by a Certified Welding Inspector (CWI) and each system is pressure tested and cleaned before delivery to the customer.

Aero-Flex has mastered tube/pipe bending with CNC mandrel bending or manual non-mandrel bends. If your facility has a mixer or other component that will move, vibrate or oscillate then Aero-Flex flexible metal hoses will be able to move along with the machinery without interrupting the flow of material.

If you have an application that calls for piping or piping systems built to comply with one of the ASME B31 standards your first step is to let Aero-Flex quote and advise on the best way to maximize your production. Call Aero-Flex at 561-745-2534 or click on the Free Quote button and let our team of experts go to work for you.

1 wire braid

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AS9100 Machine Shop

ASME 31.1

ASME 31.3

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CNC Machine

Custom Tube Bending

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Stainless Steel Flexible Hose

Stainless Steel Pipe