What Is the ASME U-1 Stamp and Why Is It Important?

Norm Hall
April 11, 2016
Printer Friendly (PDF)

The R. L. Deppmann team frequently mentions the need for an ASME U-1 stamp on heat exchangers, tanks, and air separators. What is the ASME U-1 stamp and why is it important? This week, the Monday Morning Minutes post shares the “The ASME Story,” which helps to clarify the ASME Code issue.

Subscribe to the Monday Morning Minute blog

American Society of Mechanical Engineers

ASME is the American Society of Mechanical Engineers. This organization pressure-tests vessels and tags them with a U-1 stamp that’s registered with a National Board number. In today’s world where so much product is coming from overseas, this feature needs to be specified. It provides a level of protection for your client. In addition, it’s required by code in 32 states in the U.S. and in the Canadian provinces.

You can read The ASME Story from Bell and Gossett. You’ll get helpful information on:

  • ASME code vessels
  • Identifying ASME code vessels
  • What a “U” symbol designation means
  • Why Bell and Gossett uses “U” versus the “UM” symbol
  • How these designations are used when writing specifications