# 258.6 Hydrostatic testing. **Citation:** 16 NYCRR 258.6 **Type / status:** regulation / current **Agency:** New York State Public Service Commission **Effective:** Not stated **Published:** Not stated Transportation of Liquid Petroleum (Hazardous Liquid Pipelines). (a) Each new, reconstructed, relocated, replaced, or reactivated segment of pipeline must be hydrostatically tested in accordance with this section to substantiate the current or proposed maximum operating pressure. Any pipeline, or segment thereof, for which the maximum operating pressure is to be increased must also be tested in accordance with this sectio ## Document text (a) Each new, reconstructed, relocated, replaced, or reactivated segment of pipeline must be hydrostatically tested in accordance with this section to substantiate the current or proposed maximum operating pressure. Any pipeline, or segment thereof, for which the maximum operating pressure is to be increased must also be tested in accordance with this section. (b) Notwithstanding the requirements of 49 CFR 195.302(c), the minimum test pressure at the lowest point of the test section shall be the lesser of: (1) 150 percent of the maximum operating pressure; or (2) the pressure that produces a pipe stress equivalent to 90 percent of the specified minimum yield strength of the pipe. (c) Except as provided in subdivision (d) of this section, the test pressure must be maintained throughout the pipeline segment for at least 12 hours following stabilization. (d) For a short segment of pipeline (100 feet or less) which is completely exposed and where its entire circumference may be readily examined visually for the detection of leaks, the test duration shall be at least four hours following stabilization and the test shall precede coating of the welds. (e) A calibrated recording pressure gauge that indicates increments of five pounds per square inch or less shall be attached to the test section. The gauge must be calibrated at least hourly for the first and last two hours of the test. Calibration is against a dead-weight tester attached to the test section. (f) At least five business days prior to starting a test, the corporation shall notify the office of gas and water of the department in Albany in writing. In order to maintain continuity of service during emergencies, shorter notice is permissible. The corporation shall also notify the officials of the municipalities wherein the test is to be conducted. Tests conducted under this section are not deemed satisfactory unless certified by an inspector of the office of gas and water of the department. ## Provenance - Official: Yes - Source: - Source ID: `ny-dps-nycrr` - SHA-256: `4fcffb251cfa16ff290721ce64b2d6efc8eaac3f9ae67cba08f5d1b9043a53e9` - Retrieved: 2026-08-12T06:20:40.894Z - Exported: 2026-08-24T03:23:58.649Z - Document slug: `ny-nycrr-258-6` ### Source metadata ```json { "jurisdiction": "US-NY", "title": 16, "part": "258", "partTitle": "Transportation of Liquid Petroleum (Hazardous Liquid Pipelines)", "scopeKind": "hazardous-liquid-pipeline-safety", "tocPath": [ "Part 258 Transportation of Liquid Petroleum" ], "legalScope": "Complete current terminal legal unit exposed by the DPS-designated Title 16 NYCRR pipeline-safety part inventory.", "applicabilityCaveat": "Applicability depends on the part and section, Commission jurisdiction, commodity and facility type, intrastate or interstate status, operator and activity, exemptions, waivers, federal preemption, Commission orders, and incorporated law. DPS inspects portions of interstate systems for PHMSA, but PHMSA retains federal enforcement authority. DPS states that all jurisdictional Part 256 gas-holder and Part 257 LPG-plant facilities have been decommissioned even though those regulations remain unrepealed.", "incorporationCaveat": "These parts incorporate or rely on federal pipeline regulations, federal and New York statutes, Commission rules and orders, and privately authored technical standards. Part 10 supplies incorporation details. References metadata preserves explicit citations but does not reproduce external material, determine licensing rights, or decide whether a particular incorporation is static or dynamic.", "publicationCaveat": "The New York Department of Public Service identifies these eleven Title 16 NYCRR parts as its state pipeline-safety regulations and links to the public DOS/Westlaw NYCRR reading copy. That site labels the online text unofficial and directs users needing evidentiary accuracy to the Official NYCRR maintained by the Department of State Division of Administrative Rules. Each section's 'Current through' date is the most recent official NYCRR supplement covering that section, not a uniform corpus-wide amendment date.", "rights": "New York government-edict text is preserved with DPS, Department of State, and publisher attribution. The public reading site's presentation and enhancements, agency marks, forms, annotations, and incorporated federal or privately authored standards require separate rights review; this connector does not claim rights in those materials.", "rightsReviewRequired": true, "currentThrough": "2024-05-31", "historyEvents": "No event is emitted because the section reading copy does not supply an explicit adoption, filing, or effective-date history.", "publisherCitation": "16 CRR-NY 258.6", "identityAnomaly": null, "references": [ { "citation": "49 CFR 195.302", "referenceType": "cfr", "url": "https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-D/part-195/section-195.302" } ], "region": "NY" } ```