2227 verified suppliers listed

Best Manufacturing NDT Inspection Companies

Manufacturing NDT encompasses the full range of in-process and final inspection services that support quality assurance in metal fabrication, casting, forging, and precision component manufacturing. From weld inspection during structural fabrication to ultrasonic inspection of forgings for internal discontinuities to final PT/MT inspection before shipment, manufacturing NDT companies operate within production schedules and quality management systems designed to prevent nonconforming product from reaching customers. ISO 9001–certified NDT providers are common in manufacturing supply chains, while specialized sectors (pressure equipment, aerospace components, defense hardware) require higher-tier certifications including PED compliance, ASME stamps, and Nadcap accreditation.

Why these suppliers?

  • Manufacturing NDT companies integrate into production quality plans, operating on production-pace schedules and providing in-process hold-point inspection with same-day results that keep fabrication moving.
  • ISO 9001–certified NDT providers bring documented quality management systems with calibrated equipment records, certified personnel documentation, and nonconformance tracking that satisfies supplier quality audit requirements.
  • Companies with multi-method capability (UT, RT, MT, PT, VT) can serve as a single-source NDT partner for fabricators, eliminating the coordination burden of managing multiple specialty inspection subcontractors.

180 verified suppliers found

Cincinnati, Ohio

NDT Aeroservices is a provider of contracted liquid penetrant nondestructive testing NDT services.

(513) 259-2495Website
Houston, Texas5.0

NDTCS, An ISO Certified Comp., offers NDT Testing, training, NDT certification, auditing & NDT inspection, & Level III Consulting services in the field of NDT.

+1 832-237-2800Website
Brantford, Michigan4.6(10)

Discover reliable field and lab Non-Destructive Testing services in Grand Rapids with over 115 years of experience. Ensure integrity with cutting-edge techniques and certified personnel.

(519) 304-9199Website
Covington, Georgia1.0(2)

ndtmart.com Non Destructive Testing supplies NDT equipment, accessory and consumables to companies working in the field of Non Destructive Testing - hardness testers,coating thickness gauge,thickness gauge,ultrasonic thickness gauge,ultrasonic couplant,performa

+1 770-787-7002Website
Oak Creek, Wisconsin4.0(4)

Non-destructive testing services for multiple industries.

+1 414-483-9700Website
Nashua, New Hampshire1.0(2)

NDT Systems provides ultrasonic test equipment to a broad range of industries. Our products are suitable to test a wide variety of materials.

+1 714-893-2438Website
Houston, Texas

ISOFLEX supplies stable and radioactive isotopes. We lead in pricing, enrichment, processing, and customer service. ISOFLEX is your premier isotope supplier.

+1 832-834-5406Website
Fort Worth, Texas5.0(1)

NIA Consulting & Welding Inspection, LLC - Serving North Texas, Including Dallas, Fort Worth & Abilene

+1 903-491-9769Website
Crown Point, New York5.0(1)

North Country NDT provides non-destructive testing of anything – including pressure vessels, steam tanks, piping, storage tanks, paper drying machine mills, and more.

Website
Hurricane, West Virginia5.0(2)

For 60+ years, N.I.S. has led in nondestructive testing. Ensure safety, minimize downtime with expert inspections. Contact us today to support your needs.

+1 304-562-6835Website
San Diego, California5.0(4)

With over 100 years of combined experience supporting navy and commercial industries, Standard Ship Repair travels to shipyards for welding, fabrication, mechanical and other repair projects.

+1 619-231-3808Website
St Paul, Minnesota5.0(2)

Sound Transmission Loss - Sound Absorption - Sound Power - Acoustic Testing Services - ASTM E90 - ASTM C423 - ISO 3744 - ASTM E336 - Acoustic Lab & Field Tests

+1 612-355-1277Website
Aransas Pass, Texas4.4(7)

Through the excellence of our people and products, we provide specialized technical services to assess quality, verify standards and specification compliance, improve the performance, and extend the life of materials and processes for industries worldwide.

(985) 876-5559Website
Carlsbad, New Mexico4.3

Through the excellence of our people and products, we provide specialized technical services to assess quality, verify standards and specification compliance, improve the performance, and extend the life of materials and processes for industries worldwide.

+1 985-876-5559Website
North Hollywood, California3.6(9)

Pacific Magnetic and Penetrant Co., Inc. is a Non-Destructive Testing Facility for the Aerospace Industry.

+1 818-765-7266Website

Frequently Asked Questions

What NDT methods are most common in metal fabrication and welding shops?
Visual testing (VT) by certified inspectors is the first line of quality assurance for all welds. Magnetic particle testing (MT) and liquid penetrant testing (PT) are standard for surface inspection of welds, heat-affected zones, and machined surfaces. Radiographic testing (RT) is commonly specified for pressure piping, pressure vessels, and structural welds requiring volumetric inspection. Ultrasonic testing (UT), including PAUT, is increasingly used where RT is impractical or where weld volumetric data is needed for code compliance and quality records.
What is a Certified Welding Inspector (CWI) and when is one required?
An AWS Certified Welding Inspector (CWI) is qualified to review welding procedures, evaluate welder performance qualifications, and perform visual inspection and documentation of welds. CWIs are required on many structural steel, pressure vessel, and pipeline projects — often by contract specification or by code (AWS D1.1, ASME Section IX). CWI qualification requires passing a three-part AWS examination covering fundamentals, practical application, and code knowledge. CWIs work closely with NDT technicians on fabrication projects but hold a distinct role focused on visual and procedural compliance rather than volumetric inspection.
How do I set up an NDT program for a new fabrication project?
Start with the governing code or standard specified in the project contract (ASME, AWS D1.1, API 650, etc.) and identify the required inspection categories, methods, and acceptance criteria. Develop a quality plan or inspection and test plan (ITP) that identifies inspection hold points, required method and level, documentation requirements, and release authority. Select an NDT company whose scope of certification covers all required methods. Establish the inspection cadence early — NDT integrated into the fabrication schedule avoids the bottleneck of end-of-project inspection that compresses schedules.

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