# 255.191 Design pressure of plastic fittings.

**Citation:** 16 NYCRR 255.191  
**Type / status:** regulation / current  
**Agency:** New York State Public Service Commission  
**Effective:** Not stated  
**Published:** Not stated

Transmission and Distribution of Gas. (a) The design pressure of polyvinyl chloride (PVC) Schedules-40 and 80 thermoplastic fittings must be obtained from the following table:

PVC Type II Class Location
Size inches | Schedule | 1 | 2 & 3 | 4 | 1 | 2 & 3 | 4
½ | 40 | 100 | 100 | 100 | 100 | 100 | 100
80 | 100 | 100 | 100 | 100 | 100 | 100
¾ | 40 | 100 | 100 | 96 | 100 | 100 | 100
80 | 100 | 100 

## Document text

(a) The design pressure of polyvinyl chloride (PVC) Schedules-40 and 80 thermoplastic fittings must be obtained from the following table:

PVC Type II Class Location
Size inches | Schedule | 1 | 2 & 3 | 4 | 1 | 2 & 3 | 4
½ | 40 | 100 | 100 | 100 | 100 | 100 | 100
80 | 100 | 100 | 100 | 100 | 100 | 100
¾ | 40 | 100 | 100 | 96 | 100 | 100 | 100
80 | 100 | 100 | 100 | 100 | 100 | 100
1 | 40 | 100 | 100 | 90 | 90 | 100 | 100
80 | 100 | 100 | 100 | 100 | 100 | 100
80 | 100 | 100 | 100 | 100 | 100 | 100
1¼ | 40 | 100 | 92 | 74 | 100 | 100 | 100
80 | 100 | 100 | 100 | 100 | 100 | 100
1½ | 40 | 100 | 83 | 86 | 100 | 100 | 100
80 | 100 | 100 | 94 | 100 | 100 | 100
2 | 40 | 89 | 69 | 55 | 100 | 100 | 100
80 | 100 | 100 | 81 | 100 | 100 | 100
2½ | 40 | 99 | 76 | 61 | 100 | 100 | 100
80 | 100 | 100 | 85 | 100 | 100 | 100
3 | 40 | 84 | 66 | 53 | 100 | 100 | 100
80 | 100 | 94 | 75 | 100 | 100 | 100
3½ | 40 | 77 | 60 | 48 | 100 | 100 | 96
80 | 100 | 86 | 69 | 100 | 100 | 100
4 | 40 | 71 | 56 | 44 | 100 | 100 | 89
80 | 100 | 81 | 65 | 100 | 100 | 100
5 | 40 | 82 | 49 | 39 | 100 | 97 | 78
80 | 93 | 72 | 58 | 100 | 100 | 100
6 | 40 | 56 | 44 | 35 | 100 | 88 | 71
80 | 89 | 70 | 56 | 100 | 100 | 100

These pressure ratings are the same value as the design pressure of the corresponding pipe size and schedule in the same class location, as determined by the formula given in section 255.121 of this Part.

## Provenance

- Official: Yes
- Source: <https://govt.westlaw.com/nycrr/Document/I505c9708cd1711dda432a117e6e0f345?viewType=FullText&originationContext=documenttoc&transitionType=CategoryPageItem&contextData=(sc.Default)>
- Source ID: `ny-dps-nycrr`
- SHA-256: `2eeb2ab1d538573f6dcf02cf679f6171a0126d4aa392871c6ec7b51bdf7dcc3e`
- Retrieved: 2026-08-12T06:20:40.894Z
- Exported: 2026-08-23T17:01:24.900Z
- Document slug: `ny-nycrr-255-191`

### Source metadata

```json
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  "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",
    "Design of Pipeline Components"
  ],
  "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 255.191",
  "identityAnomaly": null,
  "references": [
    {
      "citation": "16 NYCRR 255.121",
      "referenceType": "new-york-administrative-code",
      "url": "https://govt.westlaw.com/nycrr/Document/I505c6fe9cd1711dda432a117e6e0f345?viewType=FullText&originationContext=documenttoc&transitionType=CategoryPageItem&contextData=(sc.Default)"
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```