# National Transportation Safety Board — Pipeline Safety Interpretation

- **operation:** document
- **citation:** PI-22-0008
- **title:** National Transportation Safety Board — Pipeline Safety Interpretation
- **source type:** guidance
- **agency:** Pipeline and Hazardous Materials Safety Administration
- **status:** guidance
- **official:** true
- **published on:** 2022-06-13
- **effective on:** Not available
- **summary:** PI-22-0008 response to National Transportation Safety Board concerning 192.801, 195.501.
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- **app url:** https://regulus.evalyn.ai/document/phmsa-interpretation-pi-22-0008
- **source url:** https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/docs/standards-rulemaking/pipeline/interpretations/76536/ntsb-pi-22-0008-06-08-2022-part192801-and-part195501.pdf
**body:**

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U.S. Department
of Transportation
Pipeline and Hazardous
Materials Safety
Administration
1200 New Jersey Avenue, SE
Washington, DC 20590
June 8, 2022
Ms. Sara Lyons
Pipeline Investigator
National Transportation Safety Board
490 L'Enfant Plaza, SW
Washington, D.C. 20594
Dear Ms. Lyons:
In a letter to the Pipeline and Hazardous Materials Safety Administration (PHMSA), dated
May 12, 2022, you requested an interpretation regarding qualification of pipeline personnel to
perform covered tasks on pipelines under 49 Code of Federal Regulations (CFR) Part 192,
§ 192.801 and Part 195, § 195.501.
You stated the National Transportation Safety Board is investigating a natural gas-fueled
explosion that occurred during routine maintenance on a gas transmission line. You stated the
operator did not designate launching and receiving pigs as a covered task prior to the incident
and relied on on-the-job training for pigging-specific operations. You stated, similarly, industry
standards such as API 1161, Recommended Practice for Pipeline Operator Qualification (OQ),
and ANSI/GPTC Z380.1, Guide for Gas Transmission, Distribution, and Gathering Piping
Systems, may not prompt operators to identify launching and receiving pigs as a covered task.
You requested PHMSA’s interpretation of the applicability of the Federal pipeline safety
regulations for several questions. Your questions are reprinted and PHMSA’s responses follow
your questions at the end of this letter.
Applicable Regulations:
The Part 192, Subpart N—Qualification of Pipeline Personnel and the Part 195, Subpart G—
Qualification of Pipeline Personnel have identical scope requirements and are reprinted below.
§ 192.801 Scope and § 195.501 Scope
(a) This subpart prescribes the minimum requirements for operator qualification of
individuals performing covered tasks on a pipeline facility.
(b) For the purpose of this subpart, a covered task is an activity, identified by the
operator, that:
(1) Is performed on a pipeline facility;
(2) Is an operations or maintenance task;
(3) Is performed as a requirement of this part; and
(4) Affects the operation or integrity of the pipeline.
The Pipeline and Hazardous Materials Safety Administration, Office of Pipeline Safety provides written clarifications of the Regulations (49 CFR
Parts 190-199) in the form of interpretation letters. These letters reflect the agency's current application of the regulations to the specific facts
presented by the person requesting the clarification. Interpretations are not generally applicable, do not create legally-enforceable rights or
obligations, and are provided to help the specific requestor understand how to comply with the regulations.

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2
Background
Buildup of internal pipeline debris (i.e., produced sand, salt, or water, metal shavings, grease,
etc.), corrosion, and buckles or denting within a pipeline are serious problems that affect product
transportation, and pipeline integrity that can result in accidents or incidents. There are special
in-line tools, known as pigs, that can be used to help prevent these problems, to ensure optimal
flow of products, for cleaning, and internal integrity inspection of pipelines. A pigging system
consists of a pig, a launcher, and a receiver. Cleaning pigs remove debris, liquids, scale from the
internal wall, etc. Gauging pigs identify if dents or other obstructions are in the pipeline. More
sophisticated and sensitive in-line inspection (ILI) tools, often referred to as smart pigs, identify
and measure the severity of anomalies in the pipe such as wall loss due to corrosion, cracks,
dents, gouges and buckles. Each pig type has a purpose and is used after initial construction and
for maintenance or inspection of the pipelines.
Analysis
The operator qualification regulations cover operation and maintenance (O&M) tasks of a
pipeline system. As pipeline pigs are used for O&M pipeline activities and are integral to
meeting the integrity management requirements of Parts 192 and 195, the launching and
receiving of pipeline pigs is a task that meets the “four-part-test” in § 192.801(b) or
§ 195.501(b). In addition, while industry standards, such as the ones you mentioned, may
provide a useful starting point for identifying industry-accepted covered tasks, the absence of a
task within these industry standards does not mean that the task is not covered under the operator
qualification requirements in § 192.801(b) or § 195.501(b). It should be noted that ASME
B31Q, Pipeline Personnel Qualification, does identify and provide guidance for the covered task
of launching or receiving internal devices (pigs) using traps. To meet the OQ requirements,
operators must evaluate each task they perform and determine whether the task is a covered task
using the four-part-test.
Your questions are reprinted and PHMSA’s responses to your questions follow each question:
Question 1 - Must activities be specifically prescribed in the regulations to be “performed as a
requirement of this part” in accordance with 49 CFR 192.801(b)(3)?
Response 1 – No, the four-part-test is applicable for regulated pipeline activities under 49 CFR
Parts 192 and 195. Any activity meeting the four-part test is considered a covered task,
including activities that are integral to meeting the requirements of the regulations.
Question 2 - Is “launching and receiving pigs” a covered task as defined in 49 CFR 192.801(b)
and 49 CFR 195.501(b)?
Response 2 – Yes, as explained in the analysis section, the described pipeline task meets the
four-part-test.
Question 3 - Does it matter which regulation the activity is being performed to meet (i.e., 49
CFR 192.493, 192.632, 192.710, 192.750, 192.921, 192.937, 195.11(b)(10), 195.416, 195.452,
195.579(a), or any other requirement of 49 CFR Parts 192 or 195)?
The Pipeline and Hazardous Materials Safety Administration, Office of Pipeline Safety provides written clarifications of the Regulations (49 CFR
Parts 190-199) in the form of interpretation letters. These letters reflect the agency's current application of the regulations to the specific facts
presented by the person requesting the clarification. Interpretations are not generally applicable, do not create legally-enforceable rights or
obligations, and are provided to help the specific requestor understand how to comply with the regulations.

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3
Response 3 – No, the pipeline activity meets the four-part-test as explained in the analysis
section.
Question 4 - Does it matter if the activity is being performed in preparation to meet the
regulatory requirement (e.g., a gauge pig is being launched in preparation for a required in-line
inspection tool)?
Response 4 No, the pipeline activity meets the four-part-test as explained in the analysis section.
Question 5 - Does it matter if the activity is being performed to meet a performance-based
requirement (e.g., a cleaning pig is being launched to prevent and/or mitigate internal corrosion)?
Response 5 – No, the pipeline activity meets the four-part-test as explained in the analysis
section.
Conclusion
A regulated pipeline pig launching and receiving task, whether cleaning, product batching, or
integrity inspections, is an O&M activity that is performed as a requirement of Parts 192 and 195
and, therefore, is an operator qualification activity under the four-part-test. Not identifying this
task under its O&M does not exempt a pipeline operator from meeting the operator qualification
requirements. Regulations for operator qualification are not intended to explicitly identify all
possible pipeline tasks that require operator qualifications. Rather, the regulations have
established the four-part-test for which pipeline operators are to screen their activities for
operator qualification criteria. Operators must evaluate each task they perform and determine
whether the task is a covered task using the four-part-test. In addition, industry standards not
identifying launching and receiving pigs as a covered task does not exempt operators from
meeting the Federal pipeline safety regulations including the operator qualification requirements.
If we can be of further assistance, please contact Tewabe Asebe at 202-366-5523.
Sincerely,
John A. Gale
Director, Office of Standards
and Rulemaking
The Pipeline and Hazardous Materials Safety Administration, Office of Pipeline Safety provides written clarifications of the Regulations (49 CFR
Parts 190-199) in the form of interpretation letters. These letters reflect the agency's current application of the regulations to the specific facts
presented by the person requesting the clarification. Interpretations are not generally applicable, do not create legally-enforceable rights or
obligations, and are provided to help the specific requestor understand how to comply with the regulations.

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National Transportation Safety Board
Washington, D.C. 20594
Office of Railroad, Pipeline and Hazardous Materials Investigations
May 12, 2022
John Gale
Director, Office of Standards and Rulemaking
Office of Pipeline Safety
Pipeline and Hazardous Materials Safety Administration
1200 New Jersey Avenue, SE
Washington, DC 20590-0001
Dear Mr. Gale:
I am requesting a formal interpretation of PHMSA’s Operator Qualification (OQ) Rule.
The National Transportation Safety Board is conducting an investigation of a natural gas-fueled
explosion that occurred during routine maintenance on a gas transmission line.1 The operator did
not designate launching and receiving pigs as a covered task prior to the accident; they relied on
on-the-job training for pigging-specific operations. Similarly, industry guidance such as API
1161, Recommended Practice for Pipeline Operator Qualification (OQ), and ANSI/GPTC
Z380.1, Guide for Gas Transmission, Distribution, and Gathering Piping Systems, may not
prompt operators to identify launching and receiving pigs as a covered task.
Please answer the following questions to clarify how the federal regulations apply:
 Must activities be specifically prescribed in the regulations to be “performed as a
requirement of this part” in accordance with 49 CFR 192.801(b)(3)?
 Is “launching and receiving pigs” a covered task as defined in 49 CFR 192.801(b) and 49
CFR 195.501(b)?
o Does it matter which regulation the activity is being performed to meet (i.e., 49
CFR 192.493, 192.632, 192.710, 192.750, 192.921, 192.937, 195.11(b)(10),
195.416, 195.452, 195.579(a), or any other requirement of 49 CFR Parts 192 or
195)?
1 See the public docket at https://data.ntsb.gov/Docket/Forms/searchdocket and search for NTSB Accident ID
PLD21FR002. Because this investigation is open, the docket will be updated in the future.

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o Does it matter if the activity is being performed in preparation to meet the
regulatory requirement (e.g., a gauge pig is being launched in preparation for a
required in-line inspection tool)?
o Does it matter if the activity is being performed to meet a performance-based
requirement (e.g., a cleaning pig is being launched to prevent and/or mitigate
internal corrosion)?
The NTSB staff appreciates PHMSA’s continued support of our ongoing investigation and your
timely response to this request.
Sincerely,
Sara Lyons
Investigator-in-Charge
2
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