DOT Approved                          32 years!!

Authorized Testing, Inc. currently provides Inspection services to many high-pressure cylinder manufacturers whose product range from Toroid Pressure Vessels for missile guidance systems to large multi-component cylinders for natural gas and hydrogen vehicle use.

 We also provide Cylinder Re-qualification Facility Inspection under the authority of the U.S. Department of Transportation Approvals Branch and Transport Canada, and have provided Cylinder Qualification Inspections to the U.S. Federal Aviation Administration and US military installations around the world.

 Authorized Testing, Inc. has experience in the inspection and testing of many types of pressure vessels. These types include:   Seamless Extruded and Drawn Aluminum  Seamless steel, Billet Pierced, Extruded tube and sheet drawn Welded and seamless Stainless Steel, Inconel, Titanium Alloy  Full composite wrap with glass, aramid, or hybrid fibers Full composite and hoop wrap with carbon or glass fibers  High pressure and ultra high-pressure components for military/aerospace applications and private industry

 The U.S. Department of Transportation, Transport Canada, and the Health and Safety Executive (UK), currently recognizes Authorized Testing, Inc. as an Independent Inspection Authority. 

 Additional provisional approvals have been granted by many other entities to allow us to inspect and test various composite pressure vessels for import into those countries:


Authorized Testing, Inc. has two test lab facilities in southern California. The main office facility is staffed by 5 full time technicians and is equipped to perform Qualification and production testing as required by the various cylinder specifications. These test include Hydraulic and Hydrostatic Pressure Testing, Environmental Exposure Testing, High and Low Temperature Cycling, Ambient Cycle Testing, and Thermal Cycle Testing.

 The Riverside facility is also capable of performing Mechanical properties Testing of all types of metals as well as carbon and fiberglass strand testing and short beam shear composite testing.  

 Our other test facility is located in a remote area of the California high dessert. This 100-acre test sight is used exclusively for all types of destructive testing such as bonfire and gunfire testing of compressed gas cylinders. The ATI test technicians who perform these potentially dangerous tests have many years of experience in this type of testing and are fully HAZMAT trained and qualified. Listed below are some of the tests routinely performed at the ATI Test Lab.

 ·         Tensile Testing per ASTM E8

·         Flattening and Bend Tests - DOT/ TC

·         Hydrostatic Water Jacket Testing to 125,000 psi

·         Proof Pressure Testing to 125,000 psi

·         Burst Testing to100,000 psi

·         Pressure Reversal Cycling to 35,000 psi

·         Gunfire Testing –DOT, NGV2 and MIL Spec

·         Thermal and Environmental Cycling – DOT/TC, NGV2, EN Standards, all CNG and Hydrogen Standards

·         Bonfire Testing – Wood, Chimney, Diesel and Propane

·         Pendulum Impact,  –NGV2, all CNG and Hydrogen Standards

·         Flaw Tolerance – NGV2, all CNG and Hydrogen Standards

·         Glass Strand and carbon fiber Testing – ASTM D2343 & ASTMD4018

·         Short Beam Shear Testing – ASTM D2344

·         Drop Testing – DOT, EN and NGV2,all CNG and Hydrogen Standards

·         Salt Spray Fog, and Salt Water Immersion  Tests - ASTM B117-97, ISO/TC 58/sc

 Tests in accordance with other specifications and customer requirements are also performed. 

 We also provide consultation on pressure vessel design as well as specification interpretation for all applications.  ATI has assisted many clients in obtaining Exemptions to DOT Hazardous Materials Regulations to allow the use of new materials and pressure vessel designs.

 Our Corporate goal is to provide the highest level of independent inspection and testing services available to our clients and to promote the continued safe use of pressure vessels and components.