QUALIFICATION OF WELDING PROCEDURES FOR WELDS CONTAINING FILLER-METAL ADDITIVES

This blog is based on following international standard API 1104.

Qualification-of-Welding-Procedures-for-Welds-Containing-Filler-metal-Additives

API 1104 provides guidelines for the qualification of welding procedures for welds containing filler-metal additives.

1. General

• Welding procedures for welds containing filler-metal additives shall be qualified in accordance with the requirements of the standard.
• The qualification of welding procedures for welds containing filler-metal additives shall include testing to determine the mechanical properties, impact properties, and corrosion resistance of the weld.

2. Scope

• This section applies to the qualification of welding procedures for welds containing filler-metal additives.

3. Definitions

• Filler-metal additives: Materials added to the filler metal to improve the properties of the weld.

4. Qualification of Welding Procedures

• Welding procedures for welds containing filler-metal additives shall be qualified in accordance with the requirements of the standard.
• The qualification of welding procedures for welds containing filler-metal additives shall include testing to determine the mechanical properties, impact properties, and corrosion resistance of the weld.

5. Welding Procedure Qualification Record

• A welding procedure qualification record shall be prepared for each welding procedure qualification.
• The welding procedure qualification record shall include the following information:
  • The base metal and filler metal used
  • The welding process and filler-metal additives
  • The joint design and weld size
  • The preheat and post-weld heat treatment
  • The testing performed
  • The results of the testing

6. Test Coupons

• Test coupons shall be prepared for the qualification of welding procedures for welds containing filler-metal additives.
• The test coupons shall be representative of the welds to be made.

7. Mechanical Testing

• Mechanical testing shall be performed to determine the tensile strength, yield strength, and elongation of the weld.
• The test specimens shall be taken from the weld and the base metal.

8. Impact Testing

• Impact testing shall be performed to determine the impact properties of the weld.
• The test specimens shall be taken from the weld and the base metal.

9. Corrosion Testing

• Corrosion testing shall be performed to determine the corrosion resistance of the weld.
• The test specimens shall be coated with the corrosion-resistant material and subjected to the corrosion test.

10. Acceptance Criteria

• The acceptance criteria for the qualification of welding procedures for welds containing filler-metal additives shall be in accordance with the requirements of the standard.

11. Requalification

• Welding procedures for welds containing filler-metal additives shall be requalified if there is a change in the base metal, filler metal, welding process, filler-metal additives, joint design, weld size, preheat, post-weld heat treatment, or the service conditions to which the weld will be subjected.

12. Welder Qualification

• Welders who will be performing welds containing filler-metal additives shall be qualified in accordance with the requirements of the standard.
• Welder qualification shall include testing to determine the welder’s ability to produce sound welds that meet the required standards.

13. Qualification of Welding Procedures for Repair Welding

• Welding procedures for repair welding of welds containing filler-metal additives shall be qualified in accordance with the requirements of the standard.
• The qualification of welding procedures for repair welding of welds containing filler-metal additives shall include testing to determine the mechanical properties, impact properties, and corrosion resistance of the weld.

14. Qualification of Welding Procedures for Welds in Corrosion-Resistant Materials

• Welding procedures for welds

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