Equipment and Material Specification According to API 1104

Here are the specifications used in API 1104, organized into 15 paragraphs with headings:

1. General Requirements

• Welding shall be performed by qualified personnel in accordance with a qualified welding procedure.
• Welds shall be made using an approved filler metal that is compatible with the base metal being welded.
• Welds shall be made using an approved welding process that is suitable for the base metal being welded.
• Welds shall be made in a manner that minimizes the formation of defects, such as porosity, cracks, and incomplete fusion.
• Welds shall be examined for defects using an approved method, such as radiographic inspection, ultrasonic testing, or magnetic particle inspection.
• Welds shall be repaired if defects are found. The repair process shall be in accordance with an approved procedure and shall result in a weld that meets the requirements of the standard.

2. Welding Process Selection

• Welding shall be done in accordance with the manufacturer’s recommendations and the applicable codes and standards.
• The welding process shall be selected based on the base metal, the thickness and geometry of the parts being welded, the location of the weld, and the service conditions to which the weld will be subjected.

3. Filler Metal Selection

• The filler metal shall be selected based on the base metal, the thickness and geometry of the parts being welded, the location of the weld, and the service conditions to which the weld will be subjected.
• The filler metal shall be compatible with the base metal and shall meet the strength and toughness requirements of the application.

4. Joint Design

• The joint design shall be selected based on the base metal, the thickness and geometry of the parts being welded, the location of the weld, and the service conditions to which the weld will be subjected.
• The joint design shall provide adequate strength, ductility, and fatigue resistance.

5. Weld Size

• The weld size shall be sufficient to provide the required strength and ductility.
• The weld size shall be in accordance with the applicable codes and standards.

6. Preheat and Post-Weld Heat Treatment

• Preheat and post-weld heat treatment shall be applied as required to control the cooling rate of the weld and the heat affected zone.
• Preheat and post-weld heat treatment shall be applied in accordance with the applicable codes and standards.

7. Welding Procedure Qualification

• Welding procedures shall be qualified in accordance with the requirements of the standard.
• Welding procedure qualification shall include testing to determine the mechanical properties, impact properties, and corrosion resistance of the weld.

8. Welder Qualification

• Welders 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.

9. Welding Equipment

• Welding equipment shall be properly maintained and calibrated.
• Welding equipment shall be selected and used in accordance with the manufacturer’s recommendations and the applicable codes and standards.

10. Welding Consumables

• Welding consumables shall be properly stored and handled.
• Welding consumables shall be selected and used in accordance with the manufacturer’s recommendations and the applicable codes and standards.

11. Nondestructive Examination

• Nondestructive examination shall be performed in accordance with the requirements of the standard.
• Nondestructive examination shall be used to detect defects in the welds.

12. Quality Control

• A written quality control plan shall be developed that addresses all aspects of the welding process.

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Equipment and Material Specification