New York Codes, Rules and Regulations › Title 16 - DEPARTMENT OF PUBLIC SERVICE › Chapter III - GAS UTILITIES › Subchapter C - Safety › Part 255 - Transmission And Distribution Of Gas › Transmission Pipeline Integrity Management › Section 255.937 - Continual process of evaluation and assessment

Current through Register Vol. 46, No. 28, July 10, 2024
(a) General. After completing the baseline
					 integrity assessment of a covered segment, an operator must continue to assess
					 the line pipe of that segment at the intervals specified in section
					 255.939  of
					 this Part and periodically evaluate the integrity of each covered pipeline
					 segment as provided in subdivision (b) of this section. An operator must
					 reassess a covered segment on which a prior assessment is credited as a
					 baseline under section
					 255.921(e) 
					 of this Part by no later than December 17, 2009. An operator must reassess a
					 covered segment on which a baseline assessment is conducted during the baseline
					 period specified in section
					 255.921(d) 
					 of this Part by no later than seven years after the baseline assessment of that
					 covered segment unless the evaluation under subdivision (b) of this section
					 indicates earlier reassessment.
(b)
					 Evaluation. An operator must conduct a periodic evaluation as frequently as
					 needed to assure the integrity of each covered segment. The periodic evaluation
					 must be based on a data integration and risk assessment of the entire pipeline
					 as specified in section
					 255.917 
					 of this Part. For plastic transmission pipelines, the periodic evaluation is
					 based on the threat analysis specified in section
					 255.917(d) 
					 of this Part. For all other transmission pipelines, the evaluation must
					 consider the past and present integrity assessment results, data integration
					 and risk assessment information (section
					 255.917 
					 of this Part), and decisions about remediation (section
					 255.933 
					 of this Part) and additional preventive and mitigative actions (section
					 255.935 
					 of this Part). An operator must use the results from this evaluation to
					 identify the threats specific to each covered segment and the risk represented
					 by these threats.
(c) Assessment
					 methods. In conducting the integrity reassessment, an operator must assess the
					 integrity of the line pipe in the covered segment by any of the following
					 methods as appropriate for the threats to which the covered segment is
					 susceptible (see section
					 255.917 
					 of this Part), or by confirmatory direct assessment under the conditions
					 specified in section
					 255.931 
					 of this Part.
(1) Internal inspection tool or
					 tools capable of detecting corrosion, and any other threats to which the
					 covered segment is susceptible. An operator must follow ASME/ANSI B31.8S (as
					 described in section
					 10.3 
					 of this Title), section
					 6.2 in
					 selecting the appropriate internal inspection tools for the covered
					 segment.
(2) Pressure test
					 conducted in accordance with the testing requirements of this Part. An operator
					 must use the test pressures specified in table 3 of section 5 of ASME/ANSI
					 B31.8S, to justify an extended reassessment interval in accordance with section
					 255.939  of
					 this Part.
(3) Direct assessment to
					 address threats of external corrosion, internal corrosion, or stress corrosion
					 cracking. An operator must conduct the direct assessment in accordance with the
					 requirements listed in section
					 255.923  of this
					 Part and with as applicable, the requirements specified in section
					 255.925,
					 255.927
					 or
					 255.929 
					 of this Part.
(4) Other technology
					 that an operator demonstrates can provide an equivalent understanding of the
					 condition of the line pipe. An operator choosing this option must notify the
					 department and OPS 180 days before conducting the assessment, in accordance
					 with section
					 255.949 
					 of this Part.
(5) Confirmatory
					 direct assessment when used on a covered segment that is scheduled for
					 reassessment at a period longer than seven years. An operator using this
					 reassessment method must comply with section
					 255.931 
					 of this Part.