UN Stock Pressure Vessels

Available at our storefront.

UN Certification Testing

Built in compliance with UN/DOT 49 CFR, parts 172-178 (latest revision), all UN vessels manufactured by Alloy Products undergo the following tests:

• Drop Test Subpart M, Section 178.603
• Leak-Resistance Test Subpart M, Section 178.604
• Hydrostatic Test Subpart M, Section 178.605
• Stacking Test Subpart M, Section 178.606
• Vibration Test Subpart M, Section 178.608
• Periodic Retesting Subpart M, Section 178.601(e)

Customers must provide Alloy Products with the specific gravity of their product for the design phase, the proper shipping name of the chemical and/or the United Nations identification number of the product. For initial design qualification, six samples of all new UN pressure vessel designs must be tested on the initial production run before use. Periodic retests are then required on two samples from subsequent production runs at least once every 12 months from the date of the original design qualification.

Thanks to the rugged construction of our tanks, Alloy Products has been certified to ship pressure vessels into the People's Republic of China. In addition, all Alloy Products vessels also fully comply with the requirements of the American Society of Mechanical Engineers (ASME) for Unfired Pressure Vessels, Section VIII, Division 1.