# 2026-15819: DOT lets gas cylinders chill longer with fancy ultrasound checks

2026-15819, Hazardous Materials: Adoption of Department of Transportation Special Permit 14175, is a Federal Register rule from Transportation Department, Pipeline and Hazardous Materials Safety Administration published 2026-08-04, effective 2026-09-03; PRIA reads it as touching household money (as of 2026-08-11).

- Canonical: https://policyrisk.com/federal-register/2026-15819
- As of: 2026-08-11
- Plain-text twin of the page above; the HTML and this file carry the same facts.

## Facts
- Document number: 2026-15819
- Title: Hazardous Materials: Adoption of Department of Transportation Special Permit 14175
- Type: Rule
- Agencies: Transportation Department; Pipeline and Hazardous Materials Safety Administration
- Citation: 91 FR 49354
- Published: 2026-08-04
- Effective: 2026-09-03
- Comments close: not stated
- Significant: no
- Touches household money: yes
- Regulation identifier numbers: 2137-AG17
- Last updated: 2026-08-11

## In one line

DOT lets gas cylinders chill longer with fancy ultrasound checks

## Summary

This final rule removes undue regulatory burdens by adopting the provisions of U.S. Department of Transportation (DOT) special permit (SP) 14175 to authorize a 10-year requalification period and the ultrasonic examination (UE) testing method for DOT specification 3A and 3AA cylinders in flammable and non-flammable, nonpoisonous gas service. This adoption reflects advances in testing technology and will relieve stakeholders of the burden of performing more frequent cylinder requalification.

## Effects PRIA read

- 10-Year Requalification Allowed for 3A/3AA: benefit, medium. If you own or operate DOT specification 3A or 3AA cylinders (water capacity 56.7 kg / 125 lb. or less), those cylinders may be requalified every 10 years instead of every 5 years when requalification uses ultrasonic examination (UE) or hydrostatic testing with visual inspection. The rule applies to…
- No Special Permit Needed; Paperwork Reduced: benefit, low. Holders of DOT Special Permit 14175 will no longer need that special permit to requalify DOT 3A or 3AA cylinder bundles using ultrasonic examination effective 30 days after publication (effective September 3, 2026). PHMSA estimates the change reduces annual respondents by 30, annual responses by 30…
- Federal Rule May Preempt State Cylinder Rules: benefit, low. This final rule addresses requalification, inspection, and testing of cylinders and will preempt State, local, and Tribal requirements on related subjects (such as the design, manufacture, inspection, marking, maintenance, repair, or testing of packagings) if those requirements are not "substantive…

## Related documents

- [2026-13805](https://policyrisk.com/federal-register/2026-13805): Pipeline Safety: Repair Criteria for Hazardous Liquid and Gas Transmission Pipelines, 2026-07-08
- [2026-10969](https://policyrisk.com/federal-register/2026-10969): Pipeline Safety: Breakout Tank Inspection Rule, 2026-06-02
- [2026-10782](https://policyrisk.com/federal-register/2026-10782): Pipeline Safety: Class Location Change Requirements; Correction, 2026-05-29
- [2026-08144](https://policyrisk.com/federal-register/2026-08144): Administrative Rulemaking, Guidance, and Enforcement Procedures, 2026-04-27
- [2026-08058](https://policyrisk.com/federal-register/2026-08058): Pipeline Safety: Safety of Gas Transmission Pipelines: MAOP Reconfirmation, Expansion of Assessment Requirements, and Other Related Amendme…, 2026-04-24
- [2026-06323](https://policyrisk.com/federal-register/2026-06323): Pipeline Safety: Class Location Change Requirements; Response to Petition for Reconsideration, 2026-04-01

## Sources
- [2026-15819 on federalregister.gov](https://www.federalregister.gov/documents/2026/08/04/2026-15819/hazardous-materials-adoption-of-department-of-transportation-special-permit-14175)
- [2026-15819 as published (PDF)](https://www.govinfo.gov/content/pkg/FR-2026-08-04/pdf/2026-15819.pdf)

## Related
- [Previous: 2026-15818, Hazardous Materials: Adoption of Department of Transportation Special Permit 21…](https://policyrisk.com/federal-register/2026-15818)
- [Next: 2026-15820, Hazardous Materials: Adoption of Department of Transportation Special Permit 21…](https://policyrisk.com/federal-register/2026-15820)
- [All Federal Register documents](https://policyrisk.com/federal-register)

Source: PRIA, https://policyrisk.com/federal-register/2026-15819 (as of 2026-08-11).