Asme Section V Article 6 Pdf

Asme Section V Article 6 Pdf Full
Asme Section V Article 6 Pdf 2017

Asme Section V Article 6 Pdf Full

Download Free PDF. Download Free PDF. Nondestructive Examination SECTION V 2019 ASME Boiler and Pressure Vessel Code An International Code. ASME Code Section V requires that NDE personnel be qualified in accordance with either: SNT-TC-1A (2006 Edition Addenda), or ANSI/ASNT CP-189 (2006 Edition).

ASME V Article 6 Liquid Penetrant Examination When specified by the referencing Code Section, the liquid penetrant examination techniques described in this Article shall be used. In general, this Article is in conformance with SE-165, Standard Test Method for Liquid Penetrant Examination. This document provides details to be considered in the procedures used. When this Article is specified by a referencing Code Section, the liquid penetrant method described in this Article shall be used together with Article 1, General Requirements. Definitions of terms used in this Article appear in Mandatory Appendix I of this Article and Article 1, Appendix I. General The liquid penetrant examination method is an effective means for detecting discontinuities which are open to the surface of nonporous metals and other materials. Typical discontinuities detectable by this method are cracks, seams, laps, cold shuts, laminations, and porosity. In principle, a liquid penetrant is applied to the surface to be examined and allowed to enter discontinuities. All excess penetrant is then removed, the part is dried, and a developer is applied. The developer functions both as a blotter to absorb penetrant that has been trapped in discontinuities, and as a contrasting background to enhance the visibility of penetrant indications. The dyes in penetrants are either color contrast (visible under white light) or fluorescent (visible under ultraviolet light). Written Procedure Requirements Requirements. Liquid penetrant examination shall be performed in accordance with a written procedure which shall as a minimum, contain the requirements listed in Table T-621. The written procedure shall establish a single value, or range of values, for each requirement. Procedure Qualification. When procedure qualification is specified, a change of requirement in Table T-621 identified as an essential variable from the specified value, or range of values, shall require requalification of the written procedure. A change of a requirement identified as a nonessential variable from the specified value, or range of values, does not require requalification of the written procedure. All changes of essential or nonessential variables from the value, or range of values, specified by the written procedure shall require revision of, or an addendum to, the written procedure. Visit our site to download http://goo.gl/5Q9I0M

The same as obtained on block 'A' during examination at 50°F to 125°F (10°C to 52°C), the proposed procedure shall be considered qualified for use. (b) If the proposed temperature for the examination is above 125°F (52°C), block 'B' shall be held at this temperature throughout the examination. Section I Section I permits UT in place of RT by utilizing Code Cases 2235, 2816, or by using PW-52.1. Code Cases 2235 and 2816 utilize fracture mechanics based acceptance criteria, while PW-52.1 references Section V, Article 4, Mandatory Appendix VII, which uses workmanship based acceptance criteria.

The liquid penetrant testing in ASME standards refers to theASME Code Section V Article 6, and it addresses the different methods andtechnique and corresponding requirements.

The requirements include to thecleaning methods, penetrant dwell time, developer dwell time, liquid penetrantmaterial specification, test object temperature requirements, techniciansqualification requirements, test procedure content requirements, test reportrequirements, etc.

The article 6 of ASME Code does not provide acceptancecriteria to evaluate test result. The construction code cover that section.

For example, if the test object is a component from powerboiler, then the acceptance criteria can be found in ASME Code Section I or ifthe test object is a part of the pressure vessel, then acceptance criteria canbe found in the ASME VIII Div 1 Appendix 8.

Liquid Penetrant Testing in ASME with Different Technique

The article 6 of ASME Code Section V introduces twotechniques with the total of 6 processes as followings:

Asme Section V Article 6 Pdf 2017

Color contrast Liquid Penetrant Testing
Fluorescent Liquid Penetrant Testing

Each of above-mentioned technique can be applied with one ofthe following methods

Water Washable Method
Post-emulsifying Method
Solvent Removable Method

For instance, based on written procedure (test procedure)you may perform the test with color contrast technique and with the removablesolvent method. So totally you have six types of liquid penetrant testing.

Obviously, the fluorescent technique has more sensitivitythan color contrast technique. You may be able to detect a defect byfluorescent technique but not with color contrast technique.

In general, the written practice (the test procedure) shallbe approved by certified ASNT Level III specialist and be conducted by LevelII. The test result can beevaluated/interpreted based on the acceptance criteria either by Level II orLevel III.

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