2227 verified suppliers listed
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NDT Companies
Industrial NDT inspection technician

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Browse 500+ verified NDT inspection companies. Compare ASNT, API & Nadcap certifications. Request free quotes from certified UT, RT, MT, PT specialists.. Compare certifications, capabilities, and request quotes — all for free.

2227+

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51

States Covered

14

Certifications

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2227 suppliers found

GreenWorks Environmental LLC
Wall Township, New Jersey4.9(172)
(732) 655-2205Website
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Ground Penetrating Radar Systems, LLC
Conway, Arkansas4.0(1)
(501) 503-2877Website
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Ground Test Solutions
Grand Ledge, Michigan5.0(2)
(517) 898-3496Website
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GSC Maine LLC
Wales, Maine5.0(8)
(207) 215-4150Website
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GT Weld Testing
Port Neches, Texas4.0(6)
+1 337-287-5279Website
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GTS Inc
Fort Smith, Arkansas5.0(2)
(479) 434-6279Website
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Guardian NDT
Odessa, Texas5.0(1)

Guardian NDT. Protecting the Future, Testing Today. Ensuring safety, quality, and reliability with advanced inspection solutions. Client Portal Core Values Culture Safety integrity Who We Are Welcome to Guardian NDT. At Guardian NDT , Our mission is to deliver top-tier Services through professionalism, safety, and integrity. We invest in training and leverage our extensive experience […]

CWI (AWS)
+1 432-777-9729Website
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Guidedwave (FBS, Inc.)
Bellefonte, Pennsylvania5.0(3)
(814) 234-3437Website
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H & S Controls & Instrumentation LLC.
Grafton, West Virginia5.0(1)
(304) 265-4433
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H & S Inspection Service, Inc.
Troy, Michigan3.2(9)
(248) 362-8141
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H.B. Compliance Solutions
Tempe, Arizona5.0(12)
(480) 684-2969Website
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Hammitt & Associates Inc
Troy, Michigan4.6(14)
(248) 577-5801Website
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Hampshire Controls Corporation
Dover, New Hampshire5.0(7)
(603) 749-9424Website
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Haven Metrology Service
Grand Haven, Michigan4.8(43)
(616) 607-8095Website
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Hawai'i Corrosion Laboratory
Honolulu, Hawaii
Website
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Hawaii Inspection Services
Kailua, Hawaii
(808) 261-3805
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Hawaii Test & Balance
Pearl City, Hawaii
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Hawaii Test Borings Inc
Pearl City, Hawaii5.0(2)
(808) 456-7059Website
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HDL Engineering Consultants
Anchorage, Alaska5.0(2)
(907) 564-2120Website
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HDL Engineering Consultants, LLC
Kenai, Alaska
(907) 564-2120Website
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Browse by Certification

API 1104API 510API 570API 653ASMEASNT Level IIASNT Level IIICWI (AWS)ISO 17025ISO 9001Nadcap NDTNAS 410Nuclear NQA-1SNT-TC-1A

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Aerospace & DefenseConstructionInfrastructureManufacturingMarineMiningNuclearOil & GasPetrochemicalPipelinePower Generation

Top Cities for NDT Companies

Los Angeles, CAChicago, ILHouston, TXPhoenix, AZPhiladelphia, PASan Antonio, TXSan Diego, CADallas, TXSan Jose, CAFort Worth, TXJacksonville, FLColumbus, OHIndianapolis, INCharlotte, NCSan Francisco, CASeattle, WADenver, CONashville, TNEl Paso, TXOklahoma City, OKPortland, ORDetroit, MIMemphis, TNLouisville, KYMilwaukee, WIAlbuquerque, NMTucson, AZKansas City, MOAtlanta, GAOmaha, NE

Frequently Asked Questions

How do I choose the right NDT inspection company?
Start by identifying your project requirements: Verify ASNT Level II/III personnel certifications are current. Confirm they have experience with your specific NDT method. Check insurance and safety records for field work. Ask about equipment calibration and reporting standards. Our directory lets you compare NDT inspection companies side by side, filter by certifications and location, and request quotes from multiple suppliers at once — all for free.
What certifications should I look for in a NDT inspection company?
The most important certifications depend on your industry. Common ones include ASNT Level III (NDT expert), API 510/570/653 (pressure equipment), ISO 17025 (lab accreditation), Nadcap NDT (aerospace), CWI (welding inspection). Use our certification filter to find suppliers that meet your specific quality requirements.
How much does it cost to work with a NDT inspection company?
Pricing varies based on several factors: NDT method required, number of test locations, accessibility of the inspection area, certification requirements, urgency and scheduling. The best approach is to request quotes from multiple qualified suppliers through our free RFQ system to compare pricing and lead times.
Can I request quotes from multiple NDT inspection companies at once?
Yes. Our multi-supplier RFQ system lets you select up to 10 NDT inspection companies and submit a single quote request. Each selected supplier receives your project details and can respond with a quote. This saves you time and helps you compare offers.
What is the typical lead time for NDT inspection companies?
Most NDT companies can mobilize field technicians within 1–5 business days. Turnaround and shutdown support may require advance scheduling of 2–4 weeks. Lab-based testing typically takes 3–7 business days.

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