# Regulus search export

- Query: `70 FR 46569`
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- As of: Current corpus
- Results: 2
- Exported: 2026-08-23T20:13:40.524Z

## 1. Pipeline Safety Advisory Bulletin; Inspecting and Testing Pilot-Operated Pressure Relief Valves

**Citation:** 70 FR 46569  
**Type / status:** guidance / guidance  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective / published:** Not stated / 2005-08-10

This notice announces a pipeline safety advisory bulletin about pilot-operated pressure relief valves installed in hazardous liquid pipelines. The bulletin provides pipeline operators guidance on whether their inspection and test procedures are adequate to determine if these valves function properly. Malfunctioning of a pilot-operated pressure relief valve was a contributing factor in an accident involving a petroleum products pipeline in Bellingham Washington.

### Provenance

- Official: Yes
- Source: <https://www.federalregister.gov/documents/2005/08/10/05-15758/pipeline-safety-advisory-bulletin-inspecting-and-testing-pilot-operated-pressure-relief-valves>
- Source ID: `federal-register`
- SHA-256: `11b2d10c7068ecf8e74bd25956fb4ea1206d2b5b24cd65d87a3c64dad1127a15`
- Retrieved: 2026-08-20T06:04:51.294Z
- Document slug: `federal-register-05-15758`
- Related records: 2

## 2. NTSB Safety Recommendation P-02-004

**Citation:** P-02-004  
**Type / status:** guidance / guidance  
**Agency:** National Transportation Safety Board  
**Effective / published:** 2002-10-11 / 2002-10-11

The National Transportation Safety Board therefore makes the following safety recommendation to the Pipeline and Hazardous Materials Safety Administration (Originally issued to RSPA): Develop and issue guidance to pipeline operators on specific testing procedures that can (1) be used to approximate actual operations during the commissioning of a new pumping station or the installation of a new relief valve, and (2) b

### Provenance

- Official: Yes
- Source: <https://data.ntsb.gov/carol-main-public/sr-details/P-02-004>
- Source ID: `ntsb-pipeline`
- SHA-256: `439a70ea80379a7f560db0a8bc6362b301cbc1f58ac915ae49b42be2c7f064d4`
- Retrieved: 2026-08-20T04:57:24.741Z
- Document slug: `ntsb-recommendation-p-02-004`
- Related records: 3