Overview of Liquid Penetrant Inspection and Magnetic Particle Inspection Specifications

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Understanding ASTM and SAE/AMS specifications to select the corresponding Magnaflux product for Liquid Penetrant and Magnetic Particle Inspections

By Cheri Stockhausen, Product Applications Manager

ASTM E1417

“Standard Practice for Liquid Penetrant Testing” governs the liquid penetrant inspection process used in manufacturing and maintenance operations.

ASTM E1417 addresses personnel requirements, equipment requirements, penetrant application, and penetrant removal methods. ASTM E1417 also establishes the required tests and testing frequency for in-use penetrant materials.

 

SAE AMS 2644

“Inspection Material, Penetrant” covers the qualification, classification, and test procedures for all liquid penetrant test materials. QPL-SAE-AMS-2644 is the Qualified Products List of the penetrants, emulsifiers, cleaners, and developers that have been qualified and approved to SAE AMS 2644.

 

ASTM E1444

“Standard Practice for Magnetic Particle Testing” is the guiding document for magnetic particle inspection. ASTM E1444 establishes magnetic particle inspection guidelines and quality control requirements.

 

ASTM E709

A supporting document that may be used with ASTM E1444. ASTM E709 is used as a reference guide for preparing inspection procedures. ASTM E709 describes magnetic particle inspection techniques that are recommended for various sizes and shapes of ferrous parts.

There is no qualified products list for magnetic particle materials. However, several AMS specifications provide the guidelines for magnetic particle materials. These AMS specifications cover the technical requirements and quality assurance provisions of various forms and methods of magnetic particle materials:

  • dry method
  • wet method
  • fluorescent
  • non-fluorescent
  • oil vehicle

These AMS documents are used together with ASTM E1444. The following chart lists the specification, description and the corresponding Magnaflux product.

 

Specification

Description

Magnaflux Product

AMS 2641

MPI Vehicle, Petroleum Base

Carrier II

AMS 3040

Magnetic Particles, non-fluorescent, dry method

1 Gray, 2 Yellow, 8A Red

AMS 3042

Magnetic Particles, non-fluorescent, wet method, dry powder

7C​ Black

AMS 3043

Magnetic Particles, non-fluorescent, wet method, oil suspension, ready to use, aerosol package

7HF

AMS 3044

Magnetic Particles, fluorescent, wet method, dry powder

14A

AMS 3045

Magnetic Particles, fluorescent, wet method, oil suspension, ready to use

14AM

AMS 3046

Magnetic Particles, fluorescent, wet method, oil suspension, ready to use, aerosol package

14AM

 

Copies of ASTM specifications may be ordered from ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959 Phone: (610) 832-9585
Website: www.astm.org

Copies of AMS/SAE specifications may be ordered from SAE World Headquarters, 400 Commonwealth Drive, Warrendale, PA 15096-0001 Phone: (724) 776-4841
Website: www.sae.org

 

 

Regular upkeep on mag particle equipment is critical for non-destructive testing to safe guard inspections & reduce downtime. Learn How to Do Preventative Maintenance for Magnetic Particle Equipment.

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