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 Rosa, California4.0(7)

Thank you for being patient. We are doing some work on the site and will be back shortly.

+1 707-544-6988Website
Ontario, California

9100 (9001:2015) certified. Certification body: Perry Johnson Registrars, Inc.. Structure: Single Site.

Sylmar, California

9100 (9001:2015) certified. Certification body: Amtivo (USA), Inc.. Structure: Single Site.

(818) 362-0371Website
San Jose, California

9100 (9001:2015) certified. Certification body: DNV Business Assurance USA, Inc.. Structure: Single Site.

(342) 256-7101Website
Santa Clara, California

9100 (9001:2015) certified. Certification body: Perry Johnson Registrars, Inc.. Structure: Single Site.

(254) 535-2419Website
Temecula, California

Long Machine has been in the machined parts industry for over ten years, serving the automotive, oil & gas, and various other industries. We guarantee precision and on time delivery. Send us your requirements today.

+1 951-296-0194Website
Cypress, California5.0(2)

LTP MODERN MACHINE, INC.

+1 562-795-1701Website
Huntington Beach, California

Precision CNC machining in Southern California. Aerospace, defense, and commercial. AS9100D, ISO 9001.

(714) 891-5551Website
Garden Grove, California

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

Bell Gardens, California

9100 (9001:2015) certified. Certification body: TUV USA, Inc.. Structure: Single Site.

Hawthorne, California5.0(4)

M&C Precision Machining: Expert machining for aluminum, copper, brass, steel, plastics, and more. High-quality, precision-engineered parts.

+1 310-644-5605Website

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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