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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

Vianh Company, Inc.
Garden Grove, California

9100 (9001:2015) certified. Certification body: International Standards Authority. Structure: Single Site.

AS9100 Rev D
(714) 590-9808Website
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Vinatech Engineering
San Diego, California4.2(5)

Quick-turn precision sheet metal and machining services

+1 858-635-9655Website
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Vineburg Machining Inc
Sonoma, California5.0(4)

Vineburg Machining, Inc. VMI is a full service cnc job shop machine shop that manufacturers custom made products for many industries

+1 707-938-8523Website
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Viper Technologies Inc
Torrance, California
+1 310-781-8200Website
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Visalia Machine And Tool
Visalia, California
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Vishnu machining and fabrication
Van Nuys, California
+1 818-336-8893
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VM Services, Inc.
Milpitas, California

9100 (9001:2015) certified. Certification body: DQS Inc.. Structure: Single Site.

AS9100 Rev D
Website
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VMHC Aerospace
Anaheim, California

9100 (9001:2015) certified. Certification body: International Standards Authority. Structure: Single Site.

AS9100 Rev D
Website
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Von Giese and Son - Machining, Metal Production, Machine Shop in Morgan Hill CA 95037
Morgan Hill, California5.0(1)
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Vortec Machine Shop
East Los Angeles, California2.8(10)
+1 323-209-8148
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VT Fabrication
Anahiem, California

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

AS9100 Rev D
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Vulcan Metal Group, LLC
Torrance, California

9100 (9001:2015) certified. Certification body: National Quality Assurance, USA. Structure: Single Site.

AS9100 Rev D
Website
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W M Machine Co
Gardena, California5.0(1)
+1 310-329-0260
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W Machine Works Inc
San Fernando, California4.7(3)

WMachine.com - a great premium domain available for sale.

AS9100 Rev D
+1 818-890-8049Website
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W precision machining & maintenance service
Riverside, California
+1 909-418-1733
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Wagner Machine
Fullerton, California5.0

Wagner Machine delivers precision machining services and CNC metal fabrication for custom, high-tolerance metal parts.

+1 714-738-4411Website
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Ward Automatic Machine Products
Tehachapi, California
+1 661-822-7543Website
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Warner National Machinery Supply
North Hollywood, California
+1 818-765-6141
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WARP13 CORP dba San Diego Machine Group
San Marcos, California

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

AS9100 Rev D
760 262 1000Website
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Watson Machine Shop
Yuba City, California
+1 530-755-2059
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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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