TWI Frequently asked questions
The most common standard applicable to underwater welding is:American Welding Society
AWS D3.6M:1999
Specification for underwater welding
ISBN: 0-87171-542-2
The specification covers requirements for welding structures or components under the surface of the water. It includes welding in both dry and wet environments.
The standard sets out four, individual classes of weld:
Class A - Comparable to above-water welding
Class B - For less critical applications
Class C - Where load bearing is not a primary consideration
Class O - To meet the requirements of another designated code or specification
Copies of the standard are available from:
The American Welding Society
550 N.W. LeJeune Road
Miami, FL 33126
USAor via their website http://www.amweld.org
