Asme Section V Article 9 ⏰ 🌟

ASME Section V, Article 9 is a part of the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code (BPVC), which provides guidelines for the nondestructive examination (NDE) of welds. Article 9 specifically deals with the "Radiographic Examination" of welds.

Here are the complete features for the topic ASME Section V Article 9:

Article 9: Radiographic Examination

Scope: This article provides requirements for the radiographic examination of welds in boiler and pressure vessel components.

Responsibilities:

• The Owner/User is responsible for specifying the radiographic examination requirements.
• The Manufacturer is responsible for performing the radiographic examination.

Radiographic Examination Techniques:

• Article 9 describes the radiographic examination techniques to be used, including:
  • X-ray and gamma-ray radiography
  • Film and digital radiography
  • Computed Tomography (CT) scanning

Radiographic Examination Procedures:

• The radiographic examination procedure must be written and must include:
  • The type of radiation to be used
  • The energy level of the radiation
  • The focal spot size and distance
  • The exposure time and technique
  • The type and size of the radiographic film or digital detector
  • The sensitivity and accuracy requirements

Image Quality Indicators (IQIs):

• IQIs are used to evaluate the quality of the radiographic image.
• Article 9 describes the types of IQIs to be used, including:
  • Wire type IQIs
  • Hole type IQIs
  • Duplex IQIs

Radiographic Acceptance Criteria:

• Article 9 provides the acceptance criteria for radiographic examination, including:
  • The types of defects that are acceptable and unacceptable
  • The size and location of defects

Evaluation of Radiographs:

• The radiographs must be evaluated by a qualified Level I, II, or III Radiographic Interpreter.
• The evaluation must include:
  • Verification of the weld joint configuration and location
  • Detection and characterization of defects
  • Comparison of the radiographs to the acceptance criteria

Reporting and Records:

• A report must be prepared for each radiographic examination, including:
  • The date and identification of the radiographic examination
  • The type and size of the weld
  • The type and energy level of the radiation used
  • The results of the radiographic examination
  • Any defects or anomalies detected

Personnel Qualification:

• Personnel performing radiographic examination and interpreting radiographs must be qualified and certified according to the ASME Recommended Practice, SNT-271.

Referenced Standards:

• Article 9 references several standards, including:
  • ASTM E94, Standard Practice for Radiography of Materials
  • ASTM E142, Standard Test Method for Determining the Radiographic Quality of Welds

Mandatory Appendices:

• Article 9 has several mandatory appendices, including:
  • Appendix I: Radiographic Examination of Welds in Boiler and Pressure Vessel Components
  • Appendix II: Guidance for the Use of Digital Radiography

Nonmandatory Appendices:

• Article 9 has several nonmandatory appendices, including:
  • Appendix A: Radiographic Examination of High-Energy X-Ray (HEX) Welds
  • Appendix B: Computed Tomography (CT) Scanning for Weld Examination

ASME Section V, Article 9 establishes the mandatory requirements for conducting Visual Examination (VT) on pressure vessels, piping, and components, defining procedures for direct, remote, and translucent techniques. It mandates written procedures covering surface preparation, specific lighting intensities, and personnel certification including annual vision tests. For a deeper dive, review this Scribd document on ASME Section V Article 9 Overview. ASME Section V Article 9 Overview | PDF | Lighting - Scribd asme section v article 9

Here’s a draft of content about ASME Section V, Article 9, suitable for a technical blog post, training summary, or internal procedure overview.

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Report: ASME Section V — Article 9 (Non-Destructive Examination — Radiographic Film Interpretation)

A. Visual Acuity (T-921(a))

Examiners must demonstrate vision capability with at least one eye (either natural or corrected) of:

• Jaeger J2 at 12 inches on a standard chart, or
• 20/20 Snellen (or equivalent) at 16 inches.

Crucial detail: This test must be administered annually.

10. Summary Checklist for ASME Section V Article 9 Compliance

Before signing off on a Visual Examination, ensure your team can answer "Yes" to the following:

• [ ] Is the examiner's vision test (Jaeger J2) dated within the last 12 months?
• [ ] Does the light meter have a valid calibration sticker?
• [ ] Is the illumination measured at the surface (not the source) above 100 fc?
• [ ] Is the surface clean (free of rust, paint, moisture)?
• [ ] Is the examiner’s eye distance ≤ 24 inches with angle ≥ 30 degrees?
• [ ] Does the report cite the referencing Code Section for acceptance (e.g., Sec. VIII UW-35)?
• [ ] Is a written Visual Examination procedure available on site?

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Radiograph evaluation procedure

1. Verify film identification, exposure data, and acceptance of technique.
2. Check film and processing quality (base density, contrast, absence of processing artifacts).
3. Review image quality indicators and verify sensitivity meets required standards for the examined thickness/material.
4. Systematically inspect film for indications: note location relative to weld, orientation, size, and appearance (shape, density, multiplicity).
5. Classify indications by type (e.g., porosity, slag, lack of fusion, crack) using characteristic image features.
6. Measure indications using magnification calibration or measurement standards on film; record linear dimensions or equivalent area.
7. Compare indications against acceptance criteria (see next section).

5. Evaluation of Indications

Article 9 defines how to look, but it generally does not define acceptance criteria. The acceptance criteria come from the referencing Code Section (e.g., Section VIII, Div 1, or B31.3). ASME Section V, Article 9 is a part

• Relevant Indications: An indication is considered "relevant" if it is caused by a discontinuity (crack, porosity, undercut).
• Non-relevant Indications: These may be caused by surface conditions, reflections, or geometry and must be re-examined to prove they are not flaws.