12197 verified suppliers listed

Best NDT Companies in California

California's NDT market spans two distinct but equally demanding sectors: aerospace and defense inspection concentrated in the Los Angeles Basin and San Diego, and industrial inspection serving the state's refineries, petrochemical facilities, and aging infrastructure. Aerospace NDT companies in California serve Boeing, Northrop Grumman, Raytheon, SpaceX, and hundreds of Tier 1 and Tier 2 suppliers requiring Nadcap-accredited NDT for flight-critical structure, engine components, and composite assemblies. Industrial NDT companies serve the Bay Area and Southern California refinery corridor, performing API inspection and corrosion monitoring. Both sectors demand rigorously certified technicians and documented inspection procedures.

Why these suppliers?

  • California's aerospace NDT market — centered on the LA Basin and San Diego — demands Nadcap accreditation, AS9100 integration, and ITAR compliance for inspection of flight-critical metallic and composite structures.
  • Southern California's refinery corridor and Bay Area industrial facilities generate consistent demand for API 510/570 inspection, corrosion monitoring, and fitness-for-service assessments.
  • California's size and industrial diversity mean NDT companies here have invested in the full range of advanced methods — PAUT, TOFD, digital radiography, and automated UT systems — giving buyers access to the latest inspection technology.

1475 verified suppliers found

Santa Ana, California1.0(1)

Hogin Machine, Inc. custom manufactures precision parts for the Aerospace, Defense, Automotive, Industrial, and Energy Industries. Our machine shops offer 5-axis machining, Swiss CNC, CNC Milling and Turning, Waterjet cutting, Welding and Fabrication. Locations in Orange County, California and Montana.

+1 714-754-1340Website
Fontana, California5.0(2)

Host Machine Inc manufactures oilfield tools, downhole tools, custom machine work and replacement parts for all of their tools

+1 909-573-3677Website
Fountain Valley, California

9100 (9001:2015) certified. Certification body: IAPMO SCB. Structure: Single Site.

Website
Paso Robles, California5.0(1)

Hubbell Machine Company, Inc. is a precision machine shop specializing in prototype, short run, and high-volume CNC milling and turning.

+1 805-434-9280Website
Huntington Beach, California5.0(2)

Huntington Beach Machining is a precision CNC machine shop in Huntington Beach, CA. ISO 9001 & AS9100D certified. CNC milling, turning, EDM, grinding for aerospace, defense, medical & industrial parts.

+1 714-894-1816Website
Vista, California

9100 (9001:2015) certified. Certification body: ABS Quality Evaluations, Inc.. Structure: Campus.

Garden Grove, California

9100 (9001:2015) certified. Certification body: ABS Quality Evaluations, Inc.. Structure: Campus.

Murrieta, California5.0(1)

Our machine shop offers CNC milling, CNC turning, & sawing. From small quantity to large scale production jobs, we are ready to meet your manufacturing needs.

+1 951-696-7736Website

Frequently Asked Questions

What NDT certifications are required for aerospace inspection in California?
Aerospace NDT in California typically requires Nadcap accreditation for the specific NDT methods being performed — particularly RT, UT, MT, PT, and ET. Individual technicians should hold NAS 410 or ASNT Level II/III certification. Many prime contractors and Tier 1 suppliers require technicians to be qualified under the customer's specific written practice, not just a general standard. ITAR registration may also be required for defense programs.
Do California NDT companies serve both aerospace and industrial clients?
Many larger California NDT companies serve both sectors, but it is common for companies to specialize. Aerospace NDT labs often focus exclusively on flight hardware and maintain Nadcap accreditation, while industrial inspection companies focus on API work, in-service inspection, and structural assessment. When sourcing, confirm that the company's written practice, certifications, and equipment are qualified for your specific application — aerospace and industrial procedures are governed by different codes and standards.
How do I find a Nadcap-accredited NDT company in California?
The Performance Review Institute (PRI) maintains the official Nadcap accredited supplier database at pri-network.com. You can search by commodity (NDT), country, and state to find currently accredited California companies. Nadcap accreditation is commodity-specific — confirm the accreditation covers the NDT method (RT, UT, MT, PT, ET, etc.) you require for your parts, not just a general NDT accreditation.

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