# 255.505 Strength test requirements for steel pipelines to operate at 125 psig (862 kPa) or more... **Citation:** 16 NYCRR 255.505 **Type / status:** regulation / current **Agency:** New York State Public Service Commission **Effective:** Not stated **Published:** Not stated Transmission and Distribution of Gas. (a) Each segment of a steel pipeline that is to operate at a pressure of 125 psig (862 kPa) or more must be strength tested in accordance with this section to substantiate the proposed maximum allowable operating pressure. (b) The test pressure shall be at least equal to 90 percent of SMYS or 1.5 times the maximum allowable operating pressure whichever is l ## Document text (a) Each segment of a steel pipeline that is to operate at a pressure of 125 psig (862 kPa) or more must be strength tested in accordance with this section to substantiate the proposed maximum allowable operating pressure. (b) The test pressure shall be at least equal to 90 percent of SMYS or 1.5 times the maximum allowable operating pressure whichever is less. (c) The test medium may be water, inert gas or air. For facilities to be operated above 20 percent SMYS in any class location or facilities to be operated at 125 psig (862 kPa) or more in a Class 4 location the medium may only be water unless there are no buildings intended for human occupancy within 300 feet (91.4 meters) of the pipeline facilities being tested and prior approval is granted by the department to use air or inert gas as the test medium. (d) Except as provided in subdivisions (f) and (g) of this section, the strength test must be conducted by maintaining the pressure at or above the test pressure for at least 12 hours after stabilization. (e) A calibrated recording pressure gauge that will indicate increments of five psig (34.5 kPa) or less, where practicable, 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, or equivalent device, attached to the test section. (f) For a short length of pipeline which has not been backfilled and where, throughout its entire length, its entire circumference can be readily examined visually for the detection of leakage, the duration of the test may be reduced to four hours following stabilization. (g) At least five business days prior to starting the test, the operator shall make notification. In order to maintain continuity of service during emergencies, shorter notice is permissible. (h) Tests under this section are not considered as satisfactorily accomplished unless certified by an inspector of the department. ## Provenance - Official: Yes - Source: - Source ID: `ny-dps-nycrr` - SHA-256: `04b57a8ffc69255008c7269bac4b5344b4e3c6a0e1d001fa1bedeab0e616e3ac` - Retrieved: 2026-08-12T06:20:40.894Z - Exported: 2026-08-26T10:52:24.161Z - Document slug: `ny-nycrr-255-505` ### Source metadata ```json { "jurisdiction": "US-NY", "title": 16, "part": "255", "partTitle": "Transmission and Distribution of Gas", "scopeKind": "gas-pipeline-safety", "tocPath": [ "Part 255 Transmission and Distribution of Gas", "Test Requirements" ], "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 255.505", "identityAnomaly": null, "references": [], "region": "NY" } ```