# 255.199 Requirements for design of pressure relief and limiting devices. **Citation:** 16 NYCRR 255.199 **Type / status:** regulation / current **Agency:** New York State Public Service Commission **Effective:** Not stated **Published:** Not stated Transmission and Distribution of Gas. (a) Except for rupture discs, each pressure relief or pressure limiting device must: (1) be constructed of materials such that the operation of a device will not be impaired by corrosion; (2) have valves and valve seats that are designed not to stick in a position that will make the device inoperative; (3) be designed and installed so that it can be readi ## Document text (a) Except for rupture discs, each pressure relief or pressure limiting device must: (1) be constructed of materials such that the operation of a device will not be impaired by corrosion; (2) have valves and valve seats that are designed not to stick in a position that will make the device inoperative; (3) be designed and installed so that it can be readily operated to determine if the valve is free, can be tested to determine the pressure at which it will operate, and can be tested for leakage when in the closed position; (4) have its support made of noncombustible material; (5) have discharge stacks, vents, or outlet ports designed to prevent accumulation of water, ice, or snow, located where gas can be discharged into the atmosphere without undue hazard; (6) be designed and installed so that the size of the opening, pipe, and fittings located between the system to be protected and the pressure-relieving device, and the size of the vent line, are adequate to prevent hammering of the valve and to prevent impairment of relief capacity; (7) where installed at a district regulator station to protect a pipeline system from overpressuring, be designed and installed in compliance with subdivision (b) of this section to prevent any single incident such as an explosion in a vault or damage by a vehicle from affecting the operation of both the overpressure protection device and the district regulator; (8) except for a valve that will isolate the system under protection from its source of pressure be designed to prevent unauthorized operation of any stop valve that will make the pressure relief valve or pressure-limiting device inoperative; and (9) where gas pressures are reduced in two or more stages to supply pipelines except field regulators, be designed and installed in compliance with subdivision (b) of this section so that any single incident in one stage will not adversely affect another stage. (b) For new installations, and for existing aboveground stations supplying low-pressure pipelines, the minimum separation distance between the overpressure protection device and the regulator or between stages of regulation shall be: (1) 50 feet (15.2 meters); or (2) where it is impracticable because of interfering subsurface structures, not less than 25 feet (7.6 meters) upon approval of the department. (c) The requirements contained in subdivision (b) of this section do not apply to those existing stations which, due to their locations or other station protection design features, are adequately protected against any credible single incident affecting the operation of both the overpressure protection device and the district regulator, or which supply integrated distribution systems employing multiple overpressure protection devices of sufficient capacity to prevent overpressuring of the distribution system. (d) Notwithstanding the installation date or the retroactivity provided by section 255.2(a) of this Part, when overpressure protection is provided by a monitor regulator, a means must be provided to verify that the regulator is functioning properly. ## Provenance - Official: Yes - Source: - Source ID: `ny-dps-nycrr` - SHA-256: `8c19dbd57922e2c26b56a0ce93a73bad57f79cd2ab6df61c1ae5f93d5fe91cc7` - Retrieved: 2026-08-12T06:20:40.894Z - Exported: 2026-08-26T23:38:21.436Z - Document slug: `ny-nycrr-255-199` ### 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", "Overpressure Protection" ], "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 255.199", "identityAnomaly": null, "references": [ { "citation": "16 NYCRR 255.2", "referenceType": "new-york-administrative-code", "url": "https://govt.westlaw.com/nycrr/Document/I505bfa9bcd1711dda432a117e6e0f345?viewType=FullText&originationContext=documenttoc&transitionType=CategoryPageItem&contextData=(sc.Default)" } ], "region": "NY" } ```