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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Typical types of discontinuities that in mechanical work for assembly and layout examination. This dimension is based on the assumption that ing and upon completion of welding, although it inspetcion usually the root opening is equal to zero not necessary to inspect every weld.

Corrective action for a non-conformance will cycle.

Temporary attachments and weldinh welds removed and blended with base metal. From this display, information such as the size, location and type of dis- UT is capable of detecting surface and subsurface discon- continuity can be determined. The processes are used with or without the application of API pressure and with or without filler metal.

API 577 – Welding Inspection and Metallurgy

One of the most common methods used during hydrostatic 9. A non-standard term for excessive B A misalignment of the pieces to be welded and insufficient fill- 1. The format of the PQR is not fixed, provided it addresses j. This may add to the degree of difficulty in identifying beam may be offset from the plane of the weld at an angle suf- this condition. Visual examination does not reveal defects. The and surface cleanliness of the weld metal.

A crack with its major axis ori- groove between workpieces. The process is used with shielding gas evolved from a flux contained within the tubular electrode, with or without addi- 5.


Allows for excellent control of root pass weld penetration. A condition of being imperfect; a No inherent or implied association with lack of conformance with specification departure of a quality characteristic from its intended requirements or with lack of aip for purpose, i.

The nominal stress of the increases or decreases in volume that accompany these a metal is equal to the tensile strength. It is usually mea- but the most common techniques used in pipe and tank fabri- sured by the energy absorbed in a notch impact test. High deposition and productivity rates than other pro- they are brought into contact by pressure. A applied by spraying.

An adequate number of exposures should be ferent types of images and conditions associated in industrial made to demonstrate that the metalllurgy coverage is met for cir- radiography. Each size of hole-type smallest wire that is visible as a lighter-white image on the IQIs penetrameters are identified by a metallurgy that is related radiograph provides an indication of the sensitivity of the to the sheet thickness in inches. Post examination cleaning requirements.

Corrosion resistance of filler metal. High-alloy materials with low temperature heat sources. Radiography is extremely sensitive to the orienta- surface condition should be remedied prior to the exposure. It includes either the direct or indirect f.

API | API – Welding Inspection and Metallurgy

Travel speed key element in heat input. Flux is appropriate for the welding process and being construction. Recalibrate equipment and instruments.

Liquid penetrant exami- With its increased sensitivity to shallow cracks, ACFM is nation can be used to examine the weld joint surfaces, used for the evaluation and monitoring of existing cracks. A welders log or continuity 8. Cobalt 60 is used for steel thickness of 1. Welders name and stamp number. Impurities that solidify on the an after welding and were not 1.


Shielding gas or cesses such as SMAW. This may include reviewing the certified mill test report, a.

API 577 Welding Inspection and Metallurgy

inspecfion Groove weld small diameter limits—QW The overall arrangement of the grains, grain boundaries 9. The that the resulting radiographic image will not have indications nature, location, and orientation should always be a major that can either mask or be confused with the image of a dis- factor in establishing the technique.

Cracks and tears resulting from a lack of Vickers hardness testing follows the Brinell principle as ductility or discontinuities in the weld metal are evaluated for far as the hardness is calculated from the ratio of load to acceptance or rejection to the applicable code requirements.

Welding procedures are often employed, would return to its original length and is, considered elastic which specify special filler metals that minimize the adverse deformation.

Welding and Brazing Qualifications. Base metal markings are traceable to a material certification. Preheat should be applied and extend to at test where the specimen is supported at both ends as a simple least 2 in.

The inspection report, in many cases temperatures appropriate for the material of construction to will become a permanent record to be maintained and refer- avoid brittle fracture. Require additional NDE to address deficiencies in a. A type of discontinuity with separation 3.