Asme Section V Article 6 Pdf

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Product Scope / Abstract. This Section contains requirements and methods for nondestructive examination which are referenced and required by other BPVC Sections. It also includes manufacturer's examination responsibilities, duties of authorized inspectors and requirements for qualification of personnel, inspection and examination.

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 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.

Asme Section V Article 6 PdfAsme section v article 6 pdf download
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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:

  1. Color contrast Liquid Penetrant Testing
  2. Fluorescent Liquid Penetrant Testing
Asme section v article 6 pdf format

Asme Section V Article 6 Pdf Printable

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

  1. Water Washable Method
  2. Post-emulsifying Method
  3. Solvent Removable Method
Asme section v article 6 pdf full

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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