# Safety Standards-Liquefied Natural Gas Facilities

**Citation:** 20 CSR 4240-40.033  
**Type / status:** regulation / current  
**Agency:** Missouri Public Service Commission  
**Effective:** 2020-07-30  
**Published:** 2025-10-31

PURPOSE: This rule prescribes safety standards for liquefied natural gas (LNG) facilities used in the transportation of gas by pipeline that is subject to the pipeline safety standards in 20 CSR 4240-40.030. This rule adopts the federal regulations on this subject matter that apply to operators of l

## Document text

PURPOSE: This rule prescribes safety standards for liquefied natural gas (LNG) facilities used in the transportation of gas by pipeline that is subject to the pipeline safety standards in 20 CSR 4240-40.030. This rule adopts the federal regulations on this subject matter that apply to operators of liquefied natural gas facilities used in the transportation of gas by pipeline that is subject to the federal pipeline safety laws and pipeline safety standards.

PUBLISHER'S NOTE: The secretary of state has determined that the publication of the entire text of the material which is incorporated by reference as a portion of this rule would be unduly cumbersome or expensive. This material as incorporated by reference in this rule shall be maintained by the agency at its headquarters and shall be made available to the public for inspection and copying at no more than the actual cost of reproduction. This note applies only to the reference material. The entire text of the rule is printed here.

(1) As set forth in the Code of Federal Regulations (CFR) dated October 1, 2018, 49 CFR part 193 is incorporated by reference and made a part of this rule. This rule does not incorporate any subsequent amendments to 49 CFR part 193. The Code of Federal Regulations is published by the Office of the Federal Register, National Archives and Records Administration, 8601 Adelphi Road, College Park, MD 20740-6001. The October 1, 2018 version of 49 CFR part 193 is available at www.gpo.gov/fdsys/search/ showcitation.action.

(2) The commission adopts the federal pipeline safety regulations for liquefied natural gas facilities, 49 CFR part 193, as rules of the commission.

(3) For purposes of this rule, the following substitutions should be made for certain references in the federal pipeline safety regulations adopted by reference in section (2) of this rule:

(A) The references to "state agency" in sections 193.2017, 193.2019, and 193.2515 of 49 CFR part 193 should refer to "the commission" instead;

(B) The reference to "state procedures" in section 193.2017 should refer to "commission procedures" instead;

(C) The reference in 49 CFR 193.2011 to "Part 191 of this subchapter" for reporting of incidents, safety-related conditions, and annual pipeline summary data for LNG plants or facilities should refer to 20 CSR 4240-40.020 instead;

(D) The reference in 49 CFR 193.2605 to "Part 191.23 of this subchapter" for reporting requirements for safety related conditions should refer to 20 CSR 4240-40.020(12) instead;

(E) The reference in 49 CFR 193.2001 to "Part 192 of this chapter" for applicability of the standards should refer to 20 CSR 4240-40.030 instead;

(F) The reference in 49 CFR 193.2629 to "section 192.461 of this chapter" for protective coatings should refer to 20 CSR 4240- 40.030(9)(G) instead; and

(G) The references in 49 CFR 193.2629 and 193.2635 to "section 192.463 of this chapter" for cathodic protection should refer to 20 CSR 4240-40.030(9)(H) instead.

(4) The federal pipeline safety regulations for liquefied natural gas (49 CFR part 193) adopted in section (2) of this rule contain subparts on general, siting requirements, design, construction, equipment, operations, maintenance, personnel qualifications and training, fire protection, and security.

(A) The general subpart contains sections on: scope, applicability, definitions, Department of Transportation (DOT) rules of regulatory construction reporting, documents incorporated by reference, plans and procedures, and mobile and temporary liquefied natural gas facilities.

(B) The siting requirements subpart contains sections on: scope, thermal radiation protection, flammable vapor-gas dispersion protection, and wind forces.

(C) The design subpart contains sections on: scope, material records, structural requirements for impoundment systems, dikes, covered systems, water removal and impoundment capacity, and requirements pertaining to nonmetallic membrane liners in storage tanks.

(D) The construction subpart contains sections on: scope, construction acceptance, corrosion control, and nondestructive tests for welds.

(E) The equipment subpart contains sections on: scope, control center, and sources of power.

(F) The operations subpart contains sections on: scope, operating procedures, cooldown, monitoring operations, emergency procedures, personnel safety, transfer procedures, investigations of failures, purging, communication systems, and operating records.

(G) The maintenance subpart contains sections on: scope, general, maintenance procedures, foreign material, support systems, fire protection, auxiliary power sources, isolating and purging, repairs, control systems, testing transfer hoses, inspecting storage tanks, corrosion protection, atmospheric corrosion control, external corrosion control, internal corrosion control, interference currents, monitoring corrosion control, remedial measures, and maintenance records.

(H) The personnel qualifications and training subpart contains sections on: scope, design and fabrication, construction, installation, inspection and testing, operations and maintenance, security, personnel health, operations and maintenance training, security training, fire protection training, and records training.

(I) The fire protection subpart contains a section on fire protection.

(J) The security subpart contains sections on: scope, security procedures, protective enclosures, protective enclosure construction, security communications, security lighting, security monitoring, alternative power sources, and warning signs.

## Provenance

- Official: Yes
- Source: <https://www.sos.mo.gov/CMSImages/AdRules/csr/current/20csr/20c4240-40.pdf>
- Source ID: `mo-sos-20-csr-4240-40`
- SHA-256: `b7de79ddb54c11a1f75c2d1c74f2f7a722904dcb2d21d265c60bef6127471945`
- Retrieved: 2026-08-20T09:00:17.567Z
- Exported: 2026-08-24T11:33:50.531Z
- Document slug: `mo-csr-20-4240-40-033`

### Source metadata

```json
{
  "jurisdiction": "US-MO",
  "chapter": 40,
  "division": 4240,
  "titleNumber": 20,
  "rule": "033",
  "category": "lng-pipeline-safety",
  "corpusScope": "bounded-missouri-chapter-40-pipeline-safety",
  "selectedRuleCount": 4,
  "chapterInventoryCount": 12,
  "sourceRevisionOn": "2025-10-31",
  "currentEffectiveOn": "2020-07-30",
  "effectiveDateBasis": "Latest explicit effective date in the official rule authority/history text; no date is inferred from compilation placement.",
  "authorityHistory": "AUTHORITY: sections 386.250, 386.310, and 393.140, RSMo 2016.* This rule originally filed as 4 CSR 240-40.033. Emergency rule filed Dec. 19, 2018, effective Dec. 29, 2018, expired June 26, 2019. Original rule filed Dec. 20, 2018, effective July 30, 2019. Moved to 20 CSR 4240-40.033, effective Aug. 28, 2019. Amended: Filed Dec. 12, 2019, effective July 30, 2020.\n\n*Original authority: 386.250, RSMo 1939, amended 1963, 1967, 1977, 1980, 1987, 1988, 1991, 1993, 1995, 1996; 386.310, RSMo 1939, amended 1979, 1989, 1996; and 393.140, RSMo 1939, amended 1949, 1967.",
  "references": [
    {
      "citation": "20 CSR 4240-40.020",
      "referenceType": "missouri-regulation",
      "url": "https://www.sos.mo.gov/CMSImages/AdRules/csr/current/20csr/20c4240-40.pdf"
    },
    {
      "citation": "20 CSR 4240-40.020(12)",
      "referenceType": "missouri-regulation",
      "url": "https://www.sos.mo.gov/CMSImages/AdRules/csr/current/20csr/20c4240-40.pdf"
    },
    {
      "citation": "20 CSR 4240-40.030",
      "referenceType": "missouri-regulation",
      "url": "https://www.sos.mo.gov/CMSImages/AdRules/csr/current/20csr/20c4240-40.pdf"
    },
    {
      "citation": "20 CSR 4240-40.030(9)(H)",
      "referenceType": "missouri-regulation",
      "url": "https://www.sos.mo.gov/CMSImages/AdRules/csr/current/20csr/20c4240-40.pdf"
    },
    {
      "citation": "20 CSR 4240-40.033",
      "referenceType": "missouri-regulation",
      "url": "https://www.sos.mo.gov/CMSImages/AdRules/csr/current/20csr/20c4240-40.pdf"
    },
    {
      "citation": "49 CFR 191.23",
      "referenceType": "federal-regulation-section",
      "url": "https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-D/part-191/section-191.23"
    },
    {
      "citation": "49 CFR 192.461",
      "referenceType": "federal-regulation-section",
      "url": "https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-D/part-192/section-192.461"
    },
    {
      "citation": "49 CFR 192.463",
      "referenceType": "federal-regulation-section",
      "url": "https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-D/part-192/section-192.463"
    },
    {
      "citation": "49 CFR 193.2001",
      "referenceType": "federal-regulation-section",
      "url": "https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-D/part-193/section-193.2001"
    },
    {
      "citation": "49 CFR 193.2011",
      "referenceType": "federal-regulation-section",
      "url": "https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-D/part-193/section-193.2011"
    },
    {
      "citation": "49 CFR 193.2017",
      "referenceType": "federal-regulation-section",
      "url": "https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-D/part-193/section-193.2017"
    },
    {
      "citation": "49 CFR 193.2019",
      "referenceType": "federal-regulation-section",
      "url": "https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-D/part-193/section-193.2019"
    },
    {
      "citation": "49 CFR 193.2515",
      "referenceType": "federal-regulation-section",
      "url": "https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-D/part-193/section-193.2515"
    },
    {
      "citation": "49 CFR 193.2605",
      "referenceType": "federal-regulation-section",
      "url": "https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-D/part-193/section-193.2605"
    },
    {
      "citation": "49 CFR 193.2629",
      "referenceType": "federal-regulation-section",
      "url": "https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-D/part-193/section-193.2629"
    },
    {
      "citation": "49 CFR 193.2635",
      "referenceType": "federal-regulation-section",
      "url": "https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-D/part-193/section-193.2635"
    },
    {
      "citation": "49 CFR Part 193",
      "referenceType": "federal-regulation",
      "url": "https://www.ecfr.gov/current/title-49/part-193"
    },
    {
      "citation": "RSMo § 386.250",
      "referenceType": "missouri-statute",
      "url": "https://revisor.mo.gov/main/OneSection.aspx?section=386.250"
    },
    {
      "citation": "RSMo § 386.310",
      "referenceType": "missouri-statute",
      "url": "https://revisor.mo.gov/main/OneSection.aspx?section=386.310"
    },
    {
      "citation": "RSMo § 393.140",
      "referenceType": "missouri-statute",
      "url": "https://revisor.mo.gov/main/OneSection.aspx?section=393.140"
    }
  ],
  "scopeCaveat": "This is a bounded current Chapter 40 pipeline-safety corpus, not all Missouri pipeline law and not every gas-utility rule in 20 CSR 4240-40. It includes the complete selected Rules .020, .030, .033, and .080. Price-volatility, accounting, rate-schedule, depreciation-study, and renewable-natural-gas program rules are inventoried but excluded; three rescinded affiliate rules remain inventory-only.",
  "applicabilityCaveat": "Applicability depends on Missouri Public Service Commission jurisdiction, operator and facility status, the particular rule, federal preemption, exemptions, waivers, and Commission orders. The PSC states that its pipeline-safety jurisdiction covers operators of intrastate natural-gas pipelines, including covered municipal and investor-owned systems. Interstate gas pipelines are generally under PHMSA jurisdiction, and the PSC states that it does not have safety jurisdiction over hazardous-liquid pipelines or liquefied-petroleum-gas systems.",
  "incorporationCaveat": "The selected rules parallel, adopt, or incorporate federal requirements including 49 CFR Parts 40, 191, 192, 193, and 199, sometimes as editions fixed by the rule and with Missouri substitutions or additions. They also reference federal forms, manuals, technical standards, and other external material. This connector preserves explicit references but does not reproduce incorporated material or independently determine its licensing, current content, or legal effect.",
  "publicationCaveat": "The Missouri Secretary of State describes the CSR as updated monthly and warns that a rule printed in the current compilation may not yet be effective; the authority section supplies the effective date. This connector uses the October 31, 2025 official Chapter 40 compilation retrieved from the current URL and records only dates expressly stated in each selected rule's authority/history text.",
  "rights": "Official Missouri rule text and government source pages are retained with attribution and cryptographic provenance. Public availability does not determine rights in state seals, site presentation, incorporated federal or privately authored standards, forms, manuals, or linked third-party material; downstream redistribution requires a separate rights review.",
  "rightsReviewRequired": true,
  "region": "MO"
}
```