How to Prepare for an NDT Inspection: A Practical Checklist

1. Define the Inspection Scope

The first step is identifying what needs to be evaluated and why.

For example, a manufacturing facility may need to inspect completed welds before shipment, while a maintenance team may need to evaluate corrosion or cracking in existing equipment.

Before requesting an inspection, determine:

• Which components, welds, or structures require testing
• How many inspection locations are involved
• Whether testing is part of fabrication, maintenance, or final acceptance
• Which discontinuities or conditions are of concern
• Whether the inspection must be completed by a specific deadline
• 
  

Providing this information helps the inspection provider understand the project and determine what additional details may be needed.

2. Identify Applicable Codes and Inspection Requirements

Inspection requirements are not identical across industries or projects.

The applicable code, specification, or customer requirement may determine which testing methods are permitted, how inspections must be performed, and which acceptance criteria apply.

For welded components, the American Welding Society provides guidance addressing different inspection methods and their applications.

Its Guide for the Nondestructive Examination of Welds is one example of an industry resource that discusses commonly used examination techniques.

Before scheduling testing, gather any available information about:

• Applicable codes and standards
• Project specifications
• Inspection procedures
• Acceptance criteria
• Required inspection coverage
• Personnel qualification requirements

If you are uncertain which requirements apply, discuss the project with your inspection provider before work begins.

3. Gather Drawings and Material Information

Technical documentation helps inspectors understand the components being evaluated.

Depending on the project, useful information may include engineering drawings, weld maps, material specifications, part numbers, and previous inspection records.

For example, an ultrasonic inspection may require information about material thickness, geometry, and the location of welds or suspected discontinuities.

Material composition can also influence the selection of an appropriate NDT method.

The American Society for Nondestructive Testing explains these differences in its overview of nondestructive testing methods.

Providing accurate documentation in advance helps the inspection team prepare for the specific application.

4. Confirm the Material and Inspection Method

Not every NDT technique is suitable for every material or defect type.

Magnetic particle testing, for example, is used with ferromagnetic materials, while liquid penetrant testing is intended to reveal surface-breaking discontinuities in suitable nonporous materials.

Ultrasonic testing can evaluate certain internal discontinuities and material thicknesses, while radiographic testing produces images of internal features using penetrating radiation.

Understanding the material and inspection objective helps determine which methods may be appropriate.

Steel City NDT offers a range of NDT/NDE inspection services for different industrial applications.

If the required method has not been specified, discuss the component and inspection objectives with the testing team before proceeding.

5. Prepare the Inspection Area and Component Surfaces

Inspection access and surface conditions can affect the effectiveness of testing

.

Depending on the method, surfaces may need to be cleaned or prepared to remove contaminants that interfere with examination.

For example, liquid penetrant testing requires suitable surface conditions so penetrant can enter surface-breaking discontinuities.

ASNT's technical article on liquid penetrant testing explains why surface cleanliness and proper processing are important.

Preparation may involve:

• Removing obstructing materials where required
• Providing access to inspection locations
• Identifying coatings or surface treatments
• Confirming whether equipment can be safely shut down
• Ensuring adequate space for inspection equipment

Do not remove coatings, dismantle equipment, or alter component surfaces without first confirming the applicable inspection requirements and obtaining appropriate authorization.

6. Coordinate Site Access and Safety Requirements

Industrial inspection work may involve active production environments, elevated work areas, confined spaces, or equipment requiring isolation.

Before the inspection team arrives, communicate any relevant site-specific safety requirements.

These may include:

• Facility access and visitor procedures
• Required personal protective equipment
• Equipment isolation or lockout/tagout procedures
• Work permits
• Elevated access arrangements
• Confined-space restrictions
• Other nearby operations that could affect testing

Certain methods, including industrial radiography, require specialized safety controls and coordination.

The inspection provider and facility representatives should establish the necessary arrangements before testing begins.

7. Confirm Scheduling and Reporting Expectations

Inspection planning should also address when testing will occur and what documentation the project requires.

Consider discussing the following details before the scheduled inspection:

• Desired inspection date
• Number of components or inspection locations
• Production or shutdown schedule
• Required report format
• Component identification and traceability
• Applicable acceptance criteria
• Report delivery expectations

Clear communication helps prevent misunderstandings about inspection scope and documentation.

Inspection reports can become important records for quality assurance, maintenance planning, and future evaluations.

What Happens After an NDT Inspection?

Following an inspection, the testing provider documents the examination and reports findings according to the applicable procedure and project requirements.

Depending on the method and scope, the results may identify relevant indications, measurements, or areas requiring further evaluation.

An indication does not automatically mean a component is unacceptable. Findings must be evaluated against the applicable acceptance criteria.

If additional examination or corrective work is required, the project team can use the inspection findings to determine appropriate next steps.

Steel City NDT supports industrial clients with professional testing and documentation to help them make informed decisions about their materials and equipment.

Why Does Proper NDT Preparation Matter?

An organized inspection process can help reduce avoidable disruptions.

When inspection requirements, component information, and site arrangements are established in advance, technicians are better positioned to perform the requested work efficiently.

Preparation also supports:

• Clear communication between project teams and inspectors
• Appropriate selection of testing procedures
• Better access to inspection locations
• More consistent documentation
• Reduced risk of unnecessary scheduling delays
• Improved coordination with manufacturing and maintenance activities

A successful inspection begins with a clearly defined scope and the information needed to perform the work.

Schedule Your NDT Inspection With Steel City NDT

Proper preparation helps your inspection proceed efficiently and provides the foundation for reliable results.

Steel City NDT offers nondestructive testing services for manufacturing, construction, infrastructure, and other industrial applications throughout Pittsburgh and surrounding regions.

Whether you need a single inspection or ongoing testing support, our team can help you understand the information required to get started.

Contact Steel City NDT to discuss your inspection requirements and request a quote.