AWS D3.6M PDF

This specification covers underwater welding in both dry and wet environments. Operations required at the surface related to and in support of underwater welding are within the scope of this document, but welding above the surface is not. All provisions of this document apply equally to new construction and to modification and repair of existing structures underwater.

Purpose

This specification addresses fabrication and quality standards for underwater welding. This document may be used in conjunction with other applicable codes or specifications for design, construction, or repair.

Application

All references to the need for approval shall be interpreted to mean approval by the duly designated person acting for and behalf of the Customer on all matters within the scope of this specification. The Customer may designate an engineer, inspector or other(s) to act in the Customer's behalf to assure that the requirements of this specification are fulfilled. The Customer should specify the authority of the authorized representatives. Hereinafter, the term Customer shall be used to mean the party contracting for the work or the authorized representative.

In this specification, the term "shall" indicates a mandatory requirement and has the significance of excluding the idea of discretion. The word "should" indicates a nonmandatory recommended practice. The word "may" implies no obligation and expresses liberty or permission.

For Class O welds (see 2.1.7 and 5.6), conflicts between referenced documents and this document shall be brought to the attention of the Customer for disposition. In general, the referenced documents may take precedence in matters not affected by the underwater environment. However, this document shall take precedence in matters concerning