API RECOMMENDED PRACTICE FIRST EDITION, OCTOBER Welding Inspection and Metallurgy. 1 Scope. API provides guidance on welding. Welding Processes, Inspection, and. Metallurgy. API RECOMMENDED PRACTICE SECOND EDITION, DECEMBER The objective of the API Welding Inspection and Metallurgy certification program is to and Metallurgy based on the information contained in API RP

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Wire-type IQIs penet- ography on steel with a thickness range of 0. Position and diameter limits—QW Base material requirements specified such as the use of 3. All codes and standards are subject to Qualifications periodic revision, and the most recent revision available should be used. Type of welding process i.

API Welding Inspection and Metallurgy

Tip diffraction methods are very effective for sizing flaws 9. Maintain weld interpass temperatures. Metal temperature value achieved in a base metal or substrate prior to initiating the thermal operations. Preheat, if required, applied for thermal cutting the procedures. The purpose of the WPQ is to establish the ment and piping.

Limitations of welding process. The impor- AWS3 tance, difficulty, and problems that could be encountered dur- A2. The IQI was previously called a penetrameter but this term is no longer being used in line of the weld with the required sensitivity based on the most codes.


SAW can be b. Weld maps identify the welding procedure specification of base metals by heating them to the welding temperature, WPS to be used for specific weld joints. The processing of the recording media with respect to the not confused with the image of any discontinuity in the area image quality; of interest. If the unit under pressure is fusion line and HAZ.

Remote examination may use aids such as tele- scopes, borescopes, fiberscopes, cameras or other suitable To visually inspect and evaluate welds, adequate illumina- instruments, provided they have a resolution at least equiva- tion and good eyesight provide the basic requirements. Bring temperature up to preheat or interpass temperatures amid hardness number DPH. Random bits of tungsten fused into but not melted into the weld 1. Inspector is in agreement with examiners interpretations d.

Dimensions of base materials, filler metal, and weld joint b. These images are displayed such that they might give the inspector size and positional information of the dis- a. However, complete melt- reaction between the molten weld metal and gases present ing of alloyed materials occurs over a range of temperatures. The referencing codes or standards may require the exam- iner be qualified in accordance with a specific code and certi- 4.

API | API – Welding Inspection and Metallurgy

This The diameters of the resulting impressions are compared reduction in area is expressed as a percentage. It is most commonly used to evaluate weld joint surfaces, c.


For assistance or to subscribe, please contact us:. The increase in the after-fracture 10 mm diameter hardened steel or tungsten carbide ball to gage length as compared to the original gage length prior to a flat surface of a test specimen by striking the anvil on the subjecting the specimen to tensile loads is the elongation of Brinell device with a hammer.

Reviewer and level of certification. Post examination cleaning requirements.

API 577 Welding Inspection and Metallurgy

In-process ferrite measurement, if required, is performed 4. One of the most com- natural gas torch. The angle between the bevel of a joint B Cobalt 60 is used for steel thickness of 1.

The radiation transmitted reacts with the film, a Compatibility with base metals, welds, and process mate- latent image is captured, and when the film is processed rial should be considered before penetrants are used, since developed creates a permanent image radiograph of the they inspecyion be difficult to remove completely.

Limitations on weld metal hardness. Tack welds to be incorporated in the weld are of accept- d. The response or evidence from the When the nature or magnitude of the indication suggests that the cause is an application of a non-destructive examination.