This specification establishes minimum acceptable requirements for weld joint detail and fabrication by welding of rotating elements in new equipment. This specification also applies to the modification or repair by welding of rotating elements in existing equipment. Equipment types covered by this specification include, but are not limited to: crushers, fans, impellers, centrifugal impellers, kilns, pulpers, gears, sheaves, drive trains, crankshafts, flywheels, power transmission shafts, air moving devices, blowers, and rotating elements of hydroelectric generating equipment. The intent of this specification is not to include steam or combustion turbine rotors, blading, or camshafts. This specification also applies to such products and procedures that are agreed to by the Manufacturer, Fabricator, or Repair Organization and the Buyer.
Requirements contained herein are not intended to nullify or void the requirements of any law or governmental agency regulation or other codes applied to components. Additional requirements may be invoked by contract documents. The specification establishes the minimum acceptable practice at the time of its publication. It is not intended to restrict new developments or in any way to inhibit advances in the art and science of welding.
This specification is intended to promote the following:
(1) High quality construction and repair of welded rotating elements of equipment;
(2) Adequate initial and sustained performance of welded rotating elements of equipment;
(3) Clear, concise fabrication practices that will be readily understood by the Manufacturer, Fabricator, Repair Organization, or Buyer; and
Conservation of human and material resources in the fabrication of welded rotating elements of equipment.
The Manufacturer, Fabricator, or Repair Organization’s adherence to this specification shall include responsibility for the following:
(1) Welding, as defined in 1.1, in accordance with this specification;
(2) Producing welds as designated on drawings by appropriate symbols and notes, with sufficient detail to show joint preparation compatible with applied processes;
(3) Providing written welding procedure specifications (WPSs);
(4) Recording and maintaining results of all welding procedure and welder performance qualification tests;
(5) Controlling use of designated base metals and welding consumables;
(6) Inspecting the welds to the requirements of this specification;
(7) Having a welding quality program in place (see 8.1.4). The requirements of AWS B5.17, Specification for the Qualification of Welding Fabricators may be used as a guide in establishing this welding quality program. Accreditation of quality systems of welding fabricators may be obtained through the AWS Certified Welding Fabricator (CWF) or equivalent programs.
Buyer’s Responsibility.
The Buyer shall:
(1) Specify in the contract documents, and prior to manufacture, any additional fabrication or testing requirements (see Clauses 7 and 8.4).
(2) Specify in the contract documents the conditions under which the Buyer, User, or both may conduct in-plant or onsite inspection to meet this specification.
(3) Ensure, when Inspectors are provided by the Buyer, that they meet the personnel requirements of Clause 8.
Additional Responsibilities.
For modification and/or repair, additional responsibilities are listed in Clause 9.
