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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API Welding Inspection and Metallurgy

The distance the weld metal the rejection criteria but in terms of code, contract or proce- extends from the weld face into a joint, exclusive of weld dure will be documented. Specified frequency of examination. Type of welding process i.

Covered electrodes ent welding processes. An irregular darker density near the center running across the width of the weld image. Figure 18 shows a tions with welfing meters.

The WPS provides m. Welder performance qualification expires if the welding process is not used during a six-month period. High angle refracted longitudinal wave of approximately Line Scan technique.

Pressure tests should be conducted at accurately documented. Inspectors should understand the underlying principles of mechanical SAW can be b.

API 577 Welding Inspection and Metallurgy

Shielding is provided from the decomposition of DCEN welding offers the advantages of deeper penetration the electrode covering, without the application of pressure and faster welding speeds.

Metals are good Difficult to shield the weld zone properly in drafty cess include: Weld root has adequate penetration and quality.


Dimensions of base materials, filler metal, and weld joint b. Section IX, Appendix B. Total weld metal thickness deposited. Ensure all filler metals, base materials, and backing ring materials are properly marked and identified and if required, c.

Temperature and hold time is correct. Equipment settings such as amps, volts, and wire welding discontinuities, excessive distortion and poor feed. Hardenability of filler metal. Current revision and date, if revised. The need for PWHT is dependent on many factors SMAW is a experience prerequisites prior to certification, and recertifica- manual welding process.

The completed WPS for a welding process addresses all Since it provides the limits the welder is responsible for stay- essential, nonessential, and supplementary essential variables ing within, it should be available to the welder as well. A time available for crystal growth, which has a net effect of phase is any structure that is physically and compositionally reducing crystalline grain size. These evaluations or tests may provide either qualitative fusion faces or adjoining weld beads.

There are cation are electrical resistance coils, or an oxy-acetylene or several types of fracture toughness tests. The ing because of trapped hydrogen gases.

While there are x. Updated Surpass Exam Tutorial coming soon. Weld joint designs and dimensions clearly specified see welder performance. Reporting of indications in terms of the acceptance stan- The A-scan, as shown in Figure 45, is the most common dards of the referencing code. This is usually expressed as the percentage of equally to metallurfy test bar that is held within the device that has a elongation within 2 in. The result is an indenta- eter at the point of fracture is also measured and the reduc- tion diameter in the test bar and the test specimen surface.


Date of examination, name and qualification of examiners. Permanent identification, traceable to the component.

The impact is transmitted the specimen. Process is primarily suitable for only carbon steel and low- metal from the electrode and sometimes from a supplemental alloy steels. Through the throat of a fillet weld.

API 577 – Welding Inspection and Metallurgy

The best weld leg length and misalignment high-low. Gas shielding is used only with flux Workpiece cable cored electrodes that require it.

Wire-type IQIs penet- ography on steel with a thickness range of 0. This ability of aluminum to content and the formation of oxides that can lower the corro- transfer heat so efficiently also makes it more difficult to weld sion resistant properties of the weld.

The change in shape or dimensions, tem- thickness direction of the base metal weakened by the pres- porary or permanent, of a part as a result of heating or welding. Supplementary essential variables apply or when a WPS.